US2611414A - Machine for twisting fan spiders - Google Patents

Description

Sept. 23, 1952 P. M. sAMPATAcos 2,611,414 l MACHINE POR TWISTING FAN SPIDERS /NvE/vrok PETER M sAMPArAcos A T TOPNEV Sept. 23, 1952 P. M. sAMPATAcos MACHINE FOR TwrsTING FAN SPIDERs 5 Sheets-Sheet 2 Filed Feb. 3, 1950 R M SAMPATACOS ATTORNEY By' MM Spt. 23, 1952 P. M. sAMPATAcos 2,611,414

' MACHINE FOR`TNISTVING FAN SPIDERS 5 Shec-:ias-SheerI 5 Filed Feb. 5, 1950 8 /Z ez I ze 7% M? f6 NVENTOR PETER MSAMPATACOS ATTORNEY Sept. 23, 1952 P. M. sAMPATAcos MACHNE OR TWISTING FAN SPIDERS 5 Sheets-Sheet 4 Filed Feb. 3, 1950 l N VEN TOR PETER M. SAMPATACS @y x (M /J ATTORNEY Sept@ 23 1952 P. M. sAMPATAcos 2,611,414

MACHINE FOR TWISTING FAN SPIDERS A TTORNEY Patented Sept. 23, 1952 MACHINE FOR TWISTING FAN SPIDERS Peter M. Sampatacos, Torrington, Conn., assignor to The Torrington Manufacturing Company, Torrington, Conn., a corporation of Connecticut Application February 3, 1950, Serial No. 142,328

40 Claims. (Cl. 153-78) The invention relates to a machine primarily adapted and intended for twisting the arms o-f spiders such as those used for carrying the blades of rotary air impellingl fans.

A fan spider of the type for which the machine is adapted to be used initially comprises a flat metallic plate having a centrally apertured main or central portion and having a plurality of integral arms extending outward from the central portion. The central portion serves as a hub or support which is adapted toI be mounted on a suitable driving shaft such as the shaft of an electric motor. The blades of the fan are connected with the several arms of the spider by riveting or otherwise, and in order that the blades may be positioned at suitable pitch angles it is necessary for the spider arms to be positioned at corresponding angles with respect to the main or central portion of the spider.

It has been the customary prior practice to first stamp or blank the spider to the required shape, and to then subject it to a pressing operation between suitable dies in order t bend the arms to the required angles. The pressing procedure is expensive and otherwise objectionable.

In the manufacture of fans it is not only necessary to provide numerous sizes of spider but also necessary for each size to provide a wide variety of pitch angles and to provide for rotation in either direction as required. This necessitates the making of a large number of sets of expensive pressing dies each useful for only a single size and for a single angle and for a single direction of rotation. Furthermore, considerable loss of time is required in changing the set-up even when the size remains the same, it being necessary to remove'one set of diesfrom the press and to install and adjust another set of dies whenever the angle of the spider-arms is to be changed. A further objection to the pressing procedure is that the arms frequently shift circumierentially and erratically to limited extents during pressing, the result being that two supposedly opposite arms are not exactly opposite. This circumferential shifting of the arms produces an unbalance in the completed fan, which unbalance must be compensated by expensive balancing procedure.

In a machine embodying the invention, the central portion of the spider' is firmly clamped and pairs of jaws are provided for gripping the several spider arms. When the jaws of the several pairs are in firm gripping engagement with the arms, the said jaws are turned simultaneously and to the samevextents about fixed axes which are ordinarily radial. The axes of move=y ment of oppositely disposed pairs of jaws are exactly opposite. As the pairs of jaws are turned the spider arms are twisted to the required angles.

By a simple adjustment of the machine the extent of twisting can be quickly set atany angle within the capacity of the machine. The direction of twisting canbe readily changed. Only one set of tools is required for each spider size.

Inasmuch Ias the opposite spider arms are rmly grippedby the jaws and inasmuch as the axes of turning are exactly opposite, there is no possibility of any circumferential shifting of the arms and they remain exactly opposite after twisting.

The machine includes many novel features of construction and operation which are shown in the drawings and described in this specification.

In the drawings I have shown in detail a preferred embodiment of the invention, but it will be understood that various changes may be made from the construction shown, and that the drawings are not to be construed as dening or limiting the scope of the invention, the claims forming a part of this specification being relied upon for Vthat purpose.

Of the drawings:

Fig. l is a plan view of a machine embodyin the invention.

Fig. 2 is a front view.

Fig. 3 is an enlarged fragmentary vertical sectional view taken along the line 3-3 of Fig. 1.

Fig. 4 is an enlarged bottom view of the spider clamping tool. I

Fig. 5 is ya fragmentary plan View taken in the direction of the arrows 5-5 in Fig. 3.

Fig. 6 is a view somewhat similar toI Fig. 3 but showing the parts in different relative positions and showing additional parts in section.

Fig. 7 is combined plan and sectional view taken along the line 'l-l of Fig. 6.

Fig. 8 is a fragmentary View taken along the line 8--3 of Fig. 6.

Fig. 9 is a View similar to Fig. 8 but showing the parts in different relative positions.

Fig. 10 is an enlarged fragmentary plan view showing a spider and one set of twisting jaws in engagement therewith.

Fig. 11 is a schematic view showing the various hydraulic parts of the machine and also showing certain parts of the electrical control system.

' Fig. 12 is a diagram o-f electrical connections.

General organisation The machine comprises la suitable main base ing parts are supported, although some of the parts of the control system may be separately supported.

Each spider S to be twisted has a centrally apertured central portion and has a plurality of arms extending outward from the said central portion. Means is provided -at or near the center of the base for supporting and clamping the central portion of the spider S, the said spider being clamped in a iixed position. Preferably and as shown, the spider is clamped in a horizontal position, but it will be understood that such terms as "horizontaP and vertical areherein usedmerely for convenience of description and areA not intended to limit the scope of the invention. Each successive spider is manually put in place prior to twisting. The base has a large recess at the front to enable the operator to stand in a convenient position for reaching the spider supporting and clamping means.

Pairs of jaws I2, I2 arey provided for engaging the respective arms of the spider S', the jaws corresponding in number and in angular spacing to the spider arms. As shown the spider S has four arms which are equally spaced angularly, and there are therefore four pairs of jaws I2, I2 which are equally spaced angularly. When the spider has a different number o-f arms, the pairs of jaws correspond to the number of arms. When the arms are angularly spaced otherwise than equally, the pairs of jaws are similarly spaced angularly. The pairs of jaws I2, I2 are initially spaced outward from the spider but they' are movable inward into spider arm engaging positions, and they are then engaged with the respective arms. After the pairs of jaws have been engaged with the spider arms, the said pairs of jaws are turned simultaneously and to the same extents about horizontal axes to twist the spider arms, the direction and extent of such turning being dependent upon the required direction and extent of twisting of the spider arms.

After twisting, the spiderY is released by the clamping means and the pairs of. jaws I2, I2 are disengaged from the spider arms and are moved horizontally outward and are turned to their initial positions. The spider with the arms thereof twisted is then manually removed by the operator.

The various parts of the machine are preferably operated hydraulically as will be described. Any suitable operating liquid may be used, and this will for convenience be referred to as oil.

For convenience of description, movements of parts to their operative positions and operative movements of the parts will be referred to as forward movements. Movements in the opposite directions will be referred to as return movements.

Spider supporting and clamping mechanism Secured to the top of the base I6 at or near the center thereof is a block I4 having a central vertical hole therein. Carried by the block I4 and extending upward therefrom is a spider locator which includes a vertical post I6. The lower end of the post enters and nts the central hole in the block, the post being releasably held in place by a set screw I8. The post I6 has an upper face from which projects a short central centering stud 20. The upper face of the post I6 may be flat or it may be otherwise shaped to conform to any desired bending or forming of the central portion of the spider. The locator preferably has means projecting above the upper face '4 thereof for engaging the spider arms to approximately locate the spider in a predetermined angular position. As shown, the last said means comprises at least two upward projecting lugs 22, 22 secured to the sides of the post I6.

The above-described locator is adapted to support and preliminarily locate the spider S, the spider ordinarily being initially flat as shown in Fig. 3. The several parts of the locator are of such size and shape as to be adapted to receive and t a spider of a particular size and shape. The centering stud 20 enters and closely fits the aperture in the central portion of the spider. and the locating lugs 22, 22 are shaped and positioned so that' each of them engages the spider between two of the arms thereof to approximately locate the spider in a predetermined angular position. The lugs 22, 22 while serving to approximately locate the spider are so shaped and positioned as to permit a subsequent minor angular movement of the spider for the final accurate locating thereof. The machine is or may be provided with a plurality of alternately useable locators, each adapted for use with a spider having. a particular size and shape. When the machine is to be used for a. spider having a diierent size or shape, a different locator is substituted.

arched bridge 24 is provided having its lower end portions secured to the base I0 adjacent opposite sides thereof. Carried by the bridge 24 at the center thereof and vertically aboveI the post I6 is a vertically movable clamping tool 26 adapted to cooperate with the locator to clamp the spider in a predetermined horizontal position. The tool 26 has a lower face adapted to engage the top of the spider S, and a central recess 28 is provided in thev said lower face to provide clearance for the centering stud 20. The lower face of the tool 26 may be flat or it may be otherwise shaped to conform to any desired bending or forming of the central portion of the spider. The upper face of the post I6 and the lower face of the tool 26 are shaped to conform with each other.

Suitable spider marking projections are preferably provided which engage one or both faces of the central portion of the spider when the spider is clamped between the locator and the clamping tool. The said marking projections may he on the lower face on the tool 26 or on the upper face of the post I6 or on both. Fig. 4 exemplies marking projections such as may be provided on the lower face of the tool 26. These marking projections are adapted, upon the application of suflicient pressure, for entering the corresponding face or faces of the spider to mark the said face with any required data, such as an arrow indicating the direction of fan rotation, or the manufacturers name, or patent numbers or the like.

For operating the clamping tool 26 there is preferably vprovider-1 a hydraulic unit which comprises a vertical cylinder 3D and which also comprises a vertically movable piston 32 as shown in Fig. 1l. A pipe 34 is provided for supplying oil under pressure to the cylinder 30 above the piston and pipe 36 is provided for supplying oil under pressure to the cylinder 30 below the piston. Connected with the vertically movable piston 32 is a. plunger 38 which extends through and nts a hole in the bridge 24. The plunger 38 has a central aperture therein and the clamping tool 26 is vreleasably held in the said aperture by means 0f a set screw 40.

As hereinafter explained in detail, the hydraulic unit initially causes the tool 26 to apply only a low pressure to the spider, this pressure being insufficient to mark or bend the spider. Subsequently, after the jaws have been moved into engaging relationship with the spider arms, the hydraulic unit causes the tool 26 to 4apply a much higher pressure to the spider, this higher pressure being sufficient to cause the `marking projections to enter and mark the spider and sufficient to cause the tool 26 and the post I6 to bend or form the spider in the event that the faces o-f the tool and post are otherwise than flat.

,Spider arm gripping jaws and associated mechanisms As has been stated, pairs of jaws l2, i2 are provided for engaging and gripping the respective arms of the spider S. The jaws and the support ing and actuating mechanisms therefore are identical in construction and a detailed description of one pair of jaws and ci one supporting and actuating mechanism will suffice.

Each pair of jaws I2 is carried by the inner end portion oi a horizontally extending carrier which is preferably a cylindrical plunger 42, the carrier or plunger d2 being supported for both endwise and rotative movement in a bearing bracket 44 secured to the base lli. rEhe axis or each plunger is preferably radial, but somedeparture from a radial position is permissible provided that the departure is exactly the same for each two oppon sitely disposed plungers. The axes of each two oppositely disposed plungers are in any event exactly opposite, and when the axes are radial they are in exact alignment.

For longitudinally moving the plunger 42 there is preferably provided a hydraulic unit which comprises a horizontal cylinder 46 secured to the bearing bracket 44 at one side thereof, and which also comprises a horizontally movable piston 48. Flexible pipes 59 and 52 are provided for supplying oil under pressure to the cylinder 46 at opposite sides of the piston 48. Connected with the piston 4B and extending in the outward direction is a piston rod 54 carrying a yoke 5E. The yoke 56 extends into an annular groove 58 formed in a member 60 secured to the plunger 42 at the outer end thereof. It will be seen that when oil is supplied to the cylinder 13S at one side or the other of the piston 4B, the piston rod 54 and the yoke 56 serve to move the plunger 42 longitudinally inward or outward. The yoke 56 permits the cylinder to move rotatively as hereinafter described.

In operation, the operator manually places the spider S on the locator with the centering stud 20 entering the aperture in the central portion of the spider and with arms of the spider at opposite sides f the locating lugs 22, 22. The spider is thus at least approximately located for subsequent operations thereon, Thereafter, by means to be described in detail, oil under pressure is supplied to the cylinder 3!! above the piston 32, thus forcing the plunger 38 downward so that the tool 26 is engaged with the tcp of the central portion of the spider. In order that the spider may be subsequently adjusted angularly, only a low pressure is initially applied by the tool 26. This initial pressure is insuiiicient to cause the before described marking projections to enter and mark the spider.

For accurately limiting the movement of the plunger 42 and of the jaws in the inward direction the yoke 56 is provided with an adjustable stop screw 62 which is engageable with a suitable iixed abutment at the outer end of the bearing bracket 44. By adjusting the screw 52 the limit of inward movement can be changed in accordance with the size or shape of the spider.

A control device is associated with each carrier or plunger 42. The control device is preferably an electric limit switch 64, this being suitably mounted in xed position on the bearing bracket 44. The switch 64 is normally open and it has an operating arm carrying a roller 66. A disc S8 is secured to 'the stop screw 62 in relatively fixed position thereon, the roller G6 of the switch being in position to be engaged by the said disc 68. As the plunger 42 approaches its innermost position, the disc 68 engages the roller 66, as shown in Fig. 7 so as to move the roller 66 toward the left and to thus close the circuit through the switch. The disc t3 is so located on the screw 62 that the circuit is closed substantially simultaneously with the engagement of the end of the screw with the abutment on the bearing bracket. Inasmuch as the disc 68 is carried by the screw 'B2 and is at a fixed distance from the inner end thereof, the action of the switch is not affected by the adjustment of the screw to change the inner limit of movement of the plunger 42.

The pairs of spider arm engaging jaws have heretofore been referred to collectively as l2, i2. Each pair of jaws comprises opposed lower and upper jaws 'l0 and l2. The lower jaw le is directly carried by the plunger 42 at the inner end portion thereof and in fixed relation thereto. rEhe upper jaw l2 is pivotally connected with the plunger for movement about a transverse horizontal axis. Preferably the jaw 'f2 is carried by a lever 'i4 which is pivotally connected with the plunger 42 by means of a transverse horizontal pivot pin 76, the upper portion of the plunger being cut away and centrally grooved to provide space for the said lever. Interposed between the plunger 42 and the lever 'i4 at the inner side of the pivot pin l5 is a coil spring 18 which tends to move the lever 'I4 and the jaw 12 upward away from the jaw l0.

The lower jaw 10 has an upper face which approximately registers with and is adapted to engage the bottom face of the corresponding arm of the spider S. A supporting member 8d is provided for the upper jaw l2, this supporting member being connected with the lever v74. The jaw 'l2 is pivotally connected with the supporting member 8!) by means of a transverse horizontal pin 82. The jaw l2 has a lower face which is adapted to engage the top face of the spider arm and it is automatically adjustable about the pivot pin 82 for proper engagement with the said top face.l When the plunger 42 is moved forward, the lower and upper faces of the jaws i9 and l2 are respectively positioned underneath and above Y the spider arm.

Carried by at least one of the carriers 42, and preferably by each of them, is a means for engaging the sides of the corresponding spider arm as the carrier moves inward, this means serving to turn the spider on the stud 20 and to accurately locate the spider in its predetermined angular position. The initial angular locating of the spider by means of the locating lugs 22, 22 is only approximately correct, and the accurate locating thereof is effected by the last said means on one or all of the carriers. As has been stated, the clamping tool 2B initially has only a light pressure against the spider, this pressure being such that the spider is permitted to turn to a slight extent, if required.

Preferably the said means for angularly locating the spider is formed integrally with one of the corresponding jaws. As shown the lower jaw T has two `opposite upstanding flanges 84, 84 which are best shown in Fig. 10, these flanges having beveled faces 86, 86 at their inner ends. The flanges 84, 84 are spaced apart by a distance equal to the width of the spider arm, and as the jaw moves inward the beveled faces 86, 86 engage the spider arm to accurately locate it angularly, the entire spider being turned, if necessary, with respect to the centering stud 20. The said flanges 64, 04 and beveled faces 86, 86 may be formed on all of the jaws 10, '10, but this is not essential.

The lower jaw l0 is detachably connected with the plunger 42 by means of a removable bolt 88, a clip 90 serving to prevent movement of the jaw about the axis of the bolt. The supporting member 80 for the upper jaw 12 is detachably connected with the lever '|4 by means of a removable bolt 92, a clip 94 serving to prevent movement of the supporting member about the axis of the bolt. It will be understood that the jaws 'I0 and '|2 must be of such size and shape as to be adapted to engage the arms of spiders having a particular size and shape. When the set-up of the machine is to be changed for spiders of a different size and shape, one set of jaws is removed and a dii'erent set of jaws is substituted.

The upper and lower faces of the jaws 'l0 and l2 may be flat, but they may be otherwise shaped when the spider arms are initially otherwise than ilat or are to be subsequently bent or formed. The spider arms may have been bent or formed so as to be otherwise than flat before the spiders reach the machine. When the spiders have been previously so bent or formed, the faces of the jaws are shaped to conform to the forming of the spider arms so as to properly engage them. In other instances, the spider arms may be flat when they reach the machine, but subsequent bending or forming is required during the operation of the machine. When the spiders are to be bent or formed by the machine, the upper and lower faces are shaped in accordance with the required bending or forming of the arms. By reason of the shapes of the jaw faces, the spider arms are bent or formed when the jaws are engaged with the spider arms as hereinafter described.

When the plunger 42 is in its retracted position, as shown in Fig. 3, the jaws and 'l2 are separated, as shown, and they remain so separated until the plunger is moved inward to position the jaws at opposite sides of the corresponding spider arms and in gripping relationship therewith. Then the jaws are relatively moved to cause them to grip the corresponding spider arm. With the construction shown the lever 'I4 is moved about the pivot pin 16 to move the upper jaw 'i2 downward so that the spider arm is firmly gripped between the said upper jaw 'l2 and the said lower jaw 10. For moving the lever '14 a plunger 96 is provided which is longitudinally movable within an aperture in the plunger 42. The plunger 96 has a beveled front cam face 98 which engages a roller |00 at the outer end of the lever '|4. As the plunger 96 moves relatively inward, the lever 14 is turned in the counterclockwise direction to move the jaw 12 downward.

Connected with the plunger 96 at the outer end thereof is a piston |02 which ts and is movable in a cylindrical hole |04 in the plunger 42, the outer end portion of the plunger 42 thus constituting a cylinder for the piston and the said piston and plunger constituting a hydraulic unit.

The rend of the hole |04 in the plunger is closed by the before-said member |60. A iiexible pipe |06 is provided which communicates with a hole |08 in the member 60, the pipe thus serving to supply oil under pressure to the outer side of the piston |02. A flexible pipe ||0 is provided which communicates with holes ||2 and ||4 in the member 60 and in the plunger 42, the pipe thus serving to supply oil under pressure to the inner side of the piston |02.

By means of the control system to be described oil is supplied through the pipe |06 immediately after the plunger 42 and the jaws 10 and 'l2 have reached their innermost spider engaging positions. The oil pressure forces the piston inward to engage the cam face 98 with the roller |00 and to thus move the jaw '|2 downward to rmly grip the spider arm. When the spider arms are initially flat and when the faces of the jaws are shaped as previously described, the arms are bent or formed by the jaws when the jaws grip the arms.

Spider twisting mechanism After the several carriers or plungers 42 and the jaws 'l0 and 12 carried thereby have been simultaneously moved to their innermost positions and after the jaws have been engaged with the respective spider arms, the said plungers are turned simultaneously and to the same extents about their horizontal axes to eiect twisting of the said spider arms. The mechanism for eecting the rotative twisting movements of the plungers and jaws will now be described.

A rotatively movable annular member ||6 is provided, this being supported on an annular bearing face ||8 on the base. The said member |6 is centrally guided by means of a bearing |20 carried by the central block |4. A retaining disc |22 serves to prevent relative upward movement of the said member ||6.

The member |6 carries gear segments |24, one such segment being provided for each plunger 42. The lower portion of each plunger 42 is formed with straight longitudinal gear teeth |26 which mesh with the teeth of the corresponding gear segment |24. The teeth of the segment |24 are so formed as to properly mesh with the straight gear teeth |26 on the plunger 42, the plunger thus being free to move longitudinally without disturbing the proper meshing of the gear teeth. It will be seen that when the annular member ||6 and the segments |24 thereon are turned about the central vertical axis, the several plungers 42 are correspondingly turned. The jaws 10 and 12 are turned with the plungers, thus twisting the spider arms with which the jaws are engaged. All of the plungers 42 are turned in unison and to the same extents and thus all of the spider arms are twisted in unison and to the same extents.

For rotatively moving the annular member I6 at least one hydraulic unit is provided and preferably there are two such units connected in parallel with each other. The two hydraulic units and the connecting means associated therewith are identical in construction and a detailed description of one of them will suffice.

Each hydraulic unit comprises a cylinder |28 and also comprises a piston |30 in the cylinder. One end of the cylinder is pivotally connected at |32 to a bracket |34 secured to the base. A connecting Irod |36 projects from the cylinder at the opposite end, this rod being connected with the piston 30. The connecting rod 36 is pivotally connected at |38 with a bracket |40 connected to and depending from the annular member |6. An

l piston rod |36 move the annular member I ||6 and the gear segments in the counterclockwise direction, as indicated by the arrow in Fig. 9, the spider arms being thus twisted in the desired clockwise direction. If it is desired to twist the spider arms in the opposite direction, fluid is supplied through the pipe |46 and the above-described action is reversed. A suitable manually operable reversing valve |48 is provided, as shown in Fig. 11, for enabling the oil to flow through the pipe |44 or the pipe |46 as desired.

For determining and limiting the angle of twisting, an adjustable stop mechanism is provided for limiting the movement of the annular member |6. As shown in Fig. 1, the member |6 carries an outward projecting lug |50, which is movable between two oppositely disposed horizontal stop screws |52 and |54 carried by the base l0, preferably on two of the brackets 44, 44. Assuming that the annular member is to be moved inthe counterclockwise direction, the screw |52 is adjusted so that it engages the lug |50 when the said lug is in its initial or neutral position, as shown in Fig. 1. The screw |54 is adjusted to permit the lug |50 to move toward the left to an extent corresponding to the required angle of twisting. By properly adjusting the screw |54 it is possible to obtain any desired angle of twisting within the limits of the machine. Iftwisting in the opposite direction is desired, the screw |54 is adjusted to engage the lug |50 when in its initial or neutral position, and the screw |52 is adjusted to permit the lug to move to the required extent toward the right.

Upon the completion of twisting, oil is supplied through the pipe and through similar pipes for the other hydraulic units so as to release the jaws from their clamping engagement with the spider arms. Oil is supplied through the pipe 50 and through similar pipes for the other hydraulic units so as to withdraw the plungers 42 and the jaws in the outward direction, and at or about the same time oil is supplied through the pipe 36 to raise the clamping tool 26 out of engagement with the spider. Finally oil is supplied through the pipe |46 or the pipe |44, according to the position of the reversing valve, to restore the member ||6 and the parts connected therewith to their initial or neutral positions. When the jaws 10 and 12 have been su'iciently withdrawn from the twisted spider, the said twisted spider is manually removed and an untwisted spider is put in place for the next following operation.

Hydraulic control system The several before described valve and piston units and also the hydraulic control elements associated therewith are shown schematically in Fig. 11, and the electrical connections are shown diagrammatically in Fig. 12. Many of the hydraulic and electrical elements are not mounted on the base I0 but are mounted on a separate panel. The hydraulic elements shown in Fig. 1l will rst be described with some general references to the electrical elements.

A tank |56 is provided for containing a supply of operating liquid which as before stated, is referred to as oil. Associated with the tank |56 'is an electric motor |58 which drives a duplex pump unit, the said pump unit comprising a low pressure pump |60 and a high pressure pump |62. Both of the pumpswithdraw oil from the tank |56.

The low pressure pump |60 is connected by means of pipes |64 and through check valves |66 and |68 with a main control valve |10. Connected with the pipes |64 between the check valves |66 and |68 are pipes |12 which lead to accumulators |14, |14. As will presently appear, the demands of the system are widely variable and at certain periods the oil requirements exceed the capacity of the pump |60. By providing the accumulators |14, |14, theoil requirements are integrated. Under some conditions excess oil flows from the pump |60 into the accumulators and under other conditions oil from the accumulators flows into the control system.

The high pressure pump |62 is connected by means of pipes and through a check valve |02 with an electrically operated valve |84. By means of a pipe |86 the high pressure pipes |80 are connected to an electrically operated valve |88. An accumulator |90 is connected with the high pressure pipes |60, this being similar in function to the accumulators |14, |14 for the low pressure system.

The valve |10 is operated by solenoids |96 and |98, and it has a neutral position to which it automatically moves when neither solenoid is energized. When the valve is in its neutral position no connections are established through it. For purposes of explanation it may be assumed that the valve |10 is in the position which it normally occupies during operative or forward movements of the several parts of the machine. Movement of the valve to this position is effected or controlled by the solenoid 95. During return movements of the several parts of the machine the valve has another position, movement of vthe valve to the last said positionbeing effected or controlled by the solenoid |98. While the movements of the valve are controlled by the said solenoids, the valve may be operated by hydraulic connections leading from the high pressure pipes |80. These hydraulic connections are omitted from the drawing for simplicity.

Connected with the main valve |10 is a pipe 200 for supplying low pressure oil to certain of the cylinders and a pipe 202 for the return of the oil from certain of ther cylinders. Also connected with the valve |10 is a pipe 204 for the return of oil from the valve to the main tank |56. When the main valve is in itsforward position,the pipes |64 are connected with the pipe 260 and the pipe 202 is connected with the return pipe ,2 04.

Connected with the pipe 200 are pipes 206 which connect with the before-mentioned pipe 34 leading to the upper end of the .cylinder 30. The before-mentioned pipe 36 connected with the lower end of the cylinder 30 is connected by means of a pipe 208 with the pipe 202 which leads to the valve |10.

A pipe 2|0 connects the pipes 206 with a pressure controlled valve 212 which valve is connected with the before-mentioned pipe 50 leading to the outer end of the cylinder 46. In addition to the pipe'50 connected with one cylinder 46, there are other similar pipes 50a, 50b and 50 connected with the other similar cylinders. The valve 2 I2 11 is initially closed, but it is so constructed that it will open when'the pressure applied through the pipe 2|0 rises above a small predetermined amount.

' The'before-mentioned pipe 52 connected with the inner end Vvoi? the cylinder 46 is connected with the pipe 202 leading to the valve |10. In addition to the pipe 52 connected with one cylinder 46', there are other similar pipes 52a, 52b and 52c connected with the other similar cylinders.

'With the valve |10 in its forward position low pressure 'oil flows through the pipes |64, 200, 208 and 34 to the upper end of the cylinder 30, thus moving the piston 3.2 downward so as to press the tool 26 against the top ofthe spider to initially hold it in'place, Inasrnuch as the oil pressure is low, only small pressure is applied to the spider and the spider can bead-justed angularly as heretofore described( As the piston 32 moves downward oil flows fromV the bottoml ofthe cylinder 30 through the pipes 3 6, 208, 202 and 204 into the tank |56.

When the tool 26 is seated against the spider, downward movementfof the piston 32 is stopped and pressure builds 'up in the cylinder 30 and in the pipes 34, 206 and 2|0. When this pressure reaches a predetermined amount, the valve 2|2 is'open'edl thus permitting oilto flow through the pipes 50, 50B, 50? I"and 50.c into the outer ends of the cylinders 46. The pistons 48 are moved inward or toward the` left as viewed in Fig. 11, thus moving the corresponding plungers 42 in the inward directions. As the pistons 48 move inward, oil flows from the inner ends of the cylinders 46 throughthe pipes 52. 52?, 52h, 52, 202 and 204 intothe tank |56..

The valve |84 is connected as before-stated with the high pressure pipes. |30. A pipe 2|.4 is also connected with the valve |84J this. pipe leading` to the main |56, `In addition, a pipe 2 6 is @Qnlected with the valve |84. which leads tu the pipe. 206., a check valve 2 I8 being included in the "saidl pipe'ZlIB, Whenthe valve |84 is in its initial position. a connection is established between the pipes 2 |6 and `2|4, but the check valve 2|8 prevents low pressure oil from the pipes 205 from flowing through these pipes 2|6 and 2|4.

When the piston y4-8.i s moved to its extreme inner position, the befor'efmentioned'limit switch 64 is closed. There arefour similar. limit switches 64 for the four piston and valve units, these limit switches being connectedin series. and being connected in series with the said electrically operated valve |84. When all four of the. limit switches `are closed, the valve |84 is electrically actuated to establish a connection between the high pressure pipes |80 and the pipe 2|6, the connection with the pipe 2|4 being closed. Thereupon high pressure oil ows througl'i the pipe 2| 6 to the pipe I34, thus applying high pressure to the cylinder 30 above the piston 32. T-he tool 26 is then pressed downward with greatly increased force so as. to. more firmly hold the spider and so as to force the projections on the tool 26 into the spider to effect the marking thereof as heretofore described. Furthermore, when the faces of the tool 26 and the postV |6 are shaped or formed so as. to be. otherwise than flat, the central portion of the spider is shaped or formed in conformity with` the shapes of the said faces. At the same time, the high pressure oil ows through the pipes 206, 2|0, 50, 50.3, 50b and 50ste the outer ends of the cylinders 46, thus applying increased pressure to the pistons 12 48 and more positively holding the plungers 42 in their innermost positions.

It will be seen that if, for any reason, lany one of the pistons 48 fails to move the corresponding carrier or plunger suilciently to close the corresponding switch 64, the val-Ve |84 remains in its initial position and the cylinders 30 and 46, 46 are not connected with the high pressure system, This may happen, for instance, when one of the spider arms has been previously bent so that the corresponding jaws 10. and 'I2A will not clear it. High pressure is applied` only when all of the carriers or plungers are moved bythe low pressure sufhciently to close all of the switches G4, 64, and therefore no excessive. pressure can be applied to force any carrier orplunger against an obstruction encountered by-it.

Pipes 220 and 222 connect the ypipe 200 with a valve 224 which is initially closed but which is opened upon the application of sufficient pressure thereto. It will be seen that low pressure is initially applied to the valve 224, but this low pressuieis insufficient to open thevalve, Connected. with the valve 224v is a pipe 225i4 which leads to a pressurereducing valve 228. The beforementioned pipe |06 connects the valve 228 with the outer endoffthefcylinder |04. In addition to the pipe |06 connected with, the cylinder |04, there are other similar pipes |965, |05.b and |06A connected with the other similarcylinders. The valve 228 is soconstructedthat-it will trans.-y mit only a predetermined limited pressure,y not.. withstanding 'a4 much* higher pressure in the pipe 226. The pressure transmittedthrough the valve 22B must be sufficient to cause-the jaws .toproper- 1y grip the spiderarms and tobendor-fonnthemwhen this. is required.

The before-mentioned fppe |10, connected-with the inner end of the cylinder |04: is connected. with the pipe 202;'1eading tothe valve H0.. III.

addition to thepipe Hconneetedfwith one cylinder |04, there. are other similar pipes une. U09 and ||0c connected with the other Similar cy1.. inders.

When high pressure is establishedn the` pipes 206 as previously described, this pressure iS. transmitted through the pipes ,2 20 and:2.2.2fto the valve 2.2.4- TheV cheek valve lliprevents backs werd.. ow of the. high. pressure oil intothe low. pressure system. The high pressure applied to the valve 224A serves to openit, thus permitting oil to flow through.. the pine. 2.12.6.; through the.

valve 2 2 6 and through thepipesd .0.6. Imis. instand |06?- to the cylinders. |94... AS Stated. the valve 228 prevents pressure above a. predetermined amountto be. applied to thecylinders |04, The pistons |02- are moved inward. or toward theleft.. as viewed in Fig. 11, thus forcingv the jaws-12. into engagomentwith the spider arms, thespiden arms being gripped between thejaws '|2-J and the. jaws. 10. As the pistons. |02v move inward, oil from the inner ends. of thecylinders |04- flows through the pipes ||0, lla, H01"r |109, 202: and 204 into the tank |56.

Oil under pressure is supplied tothe cylinders |04 only afterY the carpiers or plnngers have beenmoved inward to` their innermostpositions so 'as to close the several switehes` G4, 64; TheA jaws 10 and 12 therefore cannot-prematurely grip the spider arms.

The valve |88; isfconnected as-before stated with the high pressurepipe |86. A pipe 2 30 is also connected .with the valve1|88v this pipeleading to the-maintank lss. pipes-lzsz-.are also connected with the valve/188,', thesel pipes-leadingto the before-mentioned manually operable reversing valve |48. A flow control valve 234 is connected in the pipes 232. When the valve |88 is in its initial position, a connection is established between the pipes 230 and 232, but there is no pressure to cause oil to flow through the said pipes.

When the valve |48 is in one position, the pipes 232 are connected with the pipe |44 which is connected with one end of the cylinder |28. In addition to the pipe |44 connected with the said end of the cylinder |28, there is another similar pipe |446 connected with the other similar cylinder. When the valve |48 is in its other position, the pipes 262 are connected with the pipe |46 connected with the opposite end of the cylinder |28. In addition to the pipe |46 `connected with the last said end of the cylinder |28, there is another similar .pipe |46a connected with the corresponding end of the other similar cylinder.

Also connected with the valve |48 is another pipe 236 which is connected with the pipe 208. When the valve |48 connects the pipes 232 with pipes |44 and |4411, the .pipes |46 and |46a are connected with the pipe 236. Conversely, when the valve |48 connects the pipes 232 with the pipes |46 and |464, the pipes |44 and |444 are connected with the pipe 236.

Connected with the pipe 226 is a pipe 238 which leads to a pressure operated switch 246. The switch 246 is so constructed that it will operate only when the pressure .applied through the pipe 238 reaches a predetermined high amount, the required high pressure being reached only after the pistons |02 have reached their limits of inward movement and after ilow of oil through the pipes 226 and |06 has been stopped. When the pressure in the switch 248 rises suticiently. the switch vis closed and a circuit is established to electrically operate the valve |68 so as to establish a connection between the high pressure pipe |86 and the pipes 232, the connection with the pipe 238 being closed.

When the valve |88 has been operated to admit high pressure oil to the pipes 232, the pistons |30 are moved in .one direction or the other according to the setting of the reversing valve |48. Thus the jaws are turned to twist the spider arms in the manner previously described.

It will be observed that the valve |88 is not op` erated until after sufficient pressure has been established to move the pistons |02 which engage the jaws with the spider arms, and it will be further observed that the last said pressure cannot be established until after the several carriers or plungers 42 have been move-d to their inner positions. The twisting mechanism cannot operate prematurely and can operate only jafter the jaws have been properly eng-aged with the spider arms.

A pipe 242 connected with the pipes 232 leads to .a pressure switch 244 which is set to operate only upon the application thereto of a high pressure. Only when the pistons |30 reach their limits of movement, :as determined by the stop |52 or |54, is the pressure in the pipes 232 and 242 increased to such an extent that the pressure switch 244 is operated. Thereupon the solenoid |96 is de-energized and the solenoid A|68 is energized, the switch |10 being moved from its described forward position to its described return position. At the same time the valve |84 is operated so as to be returned to its initial position. With the switch |10 in Iits return position and with the valve |84 operated as described, the low pressure supply pipes |64 are connected with the pipe 202 ,and the pipe 200 is connected with the return pipe 204.

With the valve |16 in the last said position low pressure oil iloWs through the pipes |64, 202, 208 and 36 to the cylinder 30 below the piston 32, the piston moving upward to withdraw the tool 26 from engagement with the spider. Oil from the upper portion of the cylincler 30 flows through the pipes 34, 206, 280 and 204 into the tank |56.

Simultaneously with the foregoing, oillows through the pipes 202, H0, Ulla, ||l|b and ||0c to the inner ends of the cylinders |04, thus moving the pistons |02 outward. As the pistons move outward, the jaws 10 and 12 :are released from gripping engagement with the spider arms. By-pass pipes 246 are provided with a check valve 24B included therein, these pipes connecting the pipe |06 with the pipe 220. Oil from the outer ends of the cylinders |04 flows through the pipes |66, |0623 |06b and |060, 246, 220, 200 Iand 204 into the tank |56.

Simultaneously with the foregoing, oil ows through the pipes 202, 52, 52e, 52b and 52 into the inner ends of the cylinders 46, the pistons 48 being moved outward to move the plung-ers 42 and the jaws 10 and 1,2 outward from their positions of engagement with the spider arms. A by-pass pipe 250 is provided having la check valve 252 therein, the said pipes 250 connecting the pipes 50, 56a, 50b and 50c. with the pipe 2|0. As the pistons 48 move outward, oil flows from the outer ends of the cylinders 46 through the pipes 50, 50a, l50b .and 50C, 250, 2|0, 206, 200 and 284 into the tank |56.

Connected with the pipe 208 is a pipe 254 which leads to .a normally closed pressure switch 256. The switch 256 is so adjusted as to open its circuit only when the pressure applied thereto is increased to a predetermined amount, this pressure only being reached when all of the pistons 26, |02 and 48 have reached their limits of return movement. The switch 266 is connected to control the electrically operated valve then moves to disconnect the pipes 232 from the pipe |86 and to connect the pipes 232 with the pipe 230. This releases the high pressure previously applied to the hydraulic twisting units. Assuming, as before, that the valve |48 is set to connect the pipes |46 Iand |469' with the pipe 236, low pressure oil flows through the pipes 236, |46 and |46a to move the pistons |30 in the direction to return the plungers 42 and the jaws 10 and 12 to their initial positions. When the pistons |66 move as last above-Idescribed, oil flows from the cylinders |28 through the pipes |46, |464, 232 and 230 into the tank |56. rPhe provision of the pressure switch 256 and its electrical connection with the electrically operated valve |88 insu-res the maintenance of pressure in the cylinders |28 until all of the other pistons have been moved to fully release the spider, thus holding the pistons |30 in their spider twisted positions. Only after the spider has been fully released are the pistons |30 moved to restore the plungers 42 and the jaws 10 .and 12 to their initial rotative positions. rFhis prevents any possible untwisting of the spider .arms which might occur if -the pistons |30 were moved prior to the complete release of theA - jaws 10 and 12 from the spider arms.

Electrical' system Referring particularly to Fig. 12, main leads 258, 260 and 262 are provided for the motor |58. Connected with the leads 260 `and 262 are leads 264 and 266 between which extend connections 268, 210, 212-, 214-, 216; 218, 280 and 282 with which various control switches and devices are connected. The contacts of the various switches are shown inthe separated or engaged positions which they occupy when the machine is idle.

Included in the connection 268- is a motor starter coil 284 and a normally` open manually operable starter switch 286. Connected inA parallel with the switch 286v is a shunt 288. Inter-- posed in the main leads 258, ZBO-and 262 and in the shunt 288 are pairs ofnormally separated The last said contacts 284, 284D, 284cr and 2849. contacts are mechanically connected for oper-ation by the coil 284, the contacts of all' of the pairs being engaged when the coil' is energized and separated when the coil is` de-energized.

When the starter switch 286 is closed'J the-coil 284 is energized and contacts'of the severalpairs are engaged tostar-t the motor |58 and to establish a shunt circuit which keeps the coil.l 284:

energized after the switch 2861 has been permitted to open. A manuallyl operatedv normally closed stop switch 290 is provided in the connection 268, this switch when openedservingtostop the motor.

Included; in the connection 218. isa forward relay coil 292 and two normally openmanually. operable push button switches.. 2.9'4-l and: 296-.' Connected in paralleliwith the switcheszZMaand. 296.is` a shunt 298. Interposed in the` shuntzZ-Sl:

sure switch 244: Whenthe switches 4294- and 296:2 are manually closed the coili292fis energized-and the contacts of the` last said several-pairs. are'- engaged, the contacts` 2824L establishinga shunt circuit which keepsthe coil- 292.-. energized.: after theswitches 294 rand-.296eareL opened- A manu--v ally-operatedswitch 388-is provided havingnormally engaged-contacts. inthe -connectiorr 218-.A

The same switch has normally'separatedfconr tacts 300EL in the connection 280:

The forward solenoid |96 for the-valve |10-:is` included in the connection4 212.: When-thee relay f coil 292` is energized to -causethe-engagementofthe contacts 2929, the solenoid |96is energized .to-

move the valve |18 to its `forward position..

The electrically operated valve |84 is included in the connection 214 as are also -theswitches-.BM- 64a, 64b and 64C. the engagement of the contacts.- 292.c andwhen the switches 64, 649, 64D and. 64c arey closedby-thc carriers or plungers as-previously described, thevalve |84 is operated to provide highpressure.

for certain ofthe hydraulicunits. as .previously described.

The connection 216` is .not connected directly withthe lead 264-but is connectedindirectlyl therewith through `the switches 64; 64a, 6412andvv Included in thecOnnection 2-16..is a relay coil 302. Also includedfin the connection 216.are-

normally separated contacts 240a forminga part ofthe pressure switch 240- andA normally engagedcontacts 256cforminga partof.` the pressure. switch 256. Connected, inzparallelz with4 the..

Alsov When the. relay.T coil 292 causes..

switch contacts 248it is a shunt 304. Interpsed in the shunt 304 and in the connection 218 are pairs of normally separated contacts 302a and 302b. When the coil 302 is energized the last said contacts are engaged, the contacts 302a establishing a shunt circuit which keeps the coil energized with the contacts 240EL separated.

The electrically operated valve |88 is included in the connection 218. The relay coil 382 is energizedv only after the switches 64, 64a, 64b and |54c are closed and only after the contacts 240'of the pressure switch 248 are engaged. When the relay 302 is energized the contacts 302b are engaged as previously stated and the valve |88 is operated. The valve |86 controls the twisting operation as previously described.

Included in the connection 280 is al return relay coil 306. Also included in the said connection andv in parallel with each other are the beforementioned normally separated switch contacts 300e, normally separatedcontactsf244b forming a partof thev pressure switch 244, and normally separated contacts 3068. Normally separated contacts 386|D are included in the connection 282. The contacts 306a and 386b areV mechanicallyconnected for operation by the relay coil 306. When the coil is energized the said contactsI are engaged, and the contacts 306a keep the coil energized when the contacts 300.- and 244b are separated.

The return solenoid` |98 for the valve |10- is included in the connection 282'. When. the contact'sv 30Gb are engaged by the action of the relay coil`308 the solenoid I98is energized to move-the. valve 98 to its return position. Preferably, norfmally engaged contacts 292d are also included in the connectionV 2801 These contacts are mechanically connected with the relay coil 292'andv are separated when. the coil is energized'. This prevents any energization of the relay. coil 30'6 except when the relay coil 292' is de-energized. It is thusirnpossible to energize the solenoid |88l whilethe solenoid |96 is energized.`

A' manually operable emergency stop switch is provided having normally engaged contacts-308` and 3081.1 in the leads 204" and 206. The stop switch may be connected'foroperation by a suit'- ably` located foot' treadle which is not shown. Theopening of the stop switch' willstop all action of' the machine, excepting only'tlie' main motor and-the pumps.

General summary of operation' Initially the several-parts of the machineare in the positions-shown in Figs: 1, 2, 3 and'5', and the-switch |10 is in-its neutral position with'no hydraulic connections` established through it; The operator places-a' spider on the centrallo-4 catorand thenA closes-both push button switches 294-1 and 296-. The provision-of twolswitcl'ies insures the location of the operators hands atposi-l clam-pY Vitand 1- theseveral carriers or plungers: 42

are .moved inward to position the jaws -18- and 12 offthe several pairs at-opposite sides of the-'spiderA arms and in gripping relationship therewith. As: the carriers and jaws move inward theflangesonY the Jaws 10, ..10-l engage the spider .arms-to' slightly:

turn'the spidenif necessary, soas to accurately locate it in position for twisting.

When the' carriers vor plungers move inward, they close the series switches 64, '64s, 64b and 64C. The contacts 292c havejbeen previously engaged by the action of the relay coil 292 and as soon as all lfour of Vthe *series switches have been closed the valvev |84 lis operated toA supply high pressure asl previously described. The contacts 292c in lthe circuit of the valve |84 which are controlled by the relay coil 292, make it impossible for the valve to be operated except when the relay is *energized to maintain the main valveV in its forwardposition. `The high pressure from the Y 'valve |84 serves to press the tool 26 downward vto eiect themarking of the spider and to more Vfirmly clamp it. lTheA high pressure also presses increased sufficiently to operate the said switch,

'-the contacts 240si thereof being engaged to enerfgize the relay coil 302. The relay coil 302 when @energized-causes the engagement of the contacts 30211, and the electrically operated valve |85?.` is 'operated to permit high pressure oil to flow to ftheV hydraulic twisting units which thenact. to iti'nn-"theA carriers orlplungers 42 andthe jaws 10 fand 12 so as to twist the spider arms as pre- ',viously described. Y Y y lWhen the twisting is completed the pressure :fat the switch 244 is increased sufficiently to `opierate `the said switch, the contacts 244a thereof being-ll separated and `|the contacts 244b thereof -bei'ngfengaged The separati-on ofthe contacts 244a dei-energizes the relay coil 292 which in turn fde-ene'rgizes the .solenoid |96 :and operates the pressure vvalve |88. The de-energizing of the relay coil 292 Valsolservesto re-engage' the contacts 292d to permitthe return relaycoil 306 to 'be'energized The engagement of the contacts i244b energizes the return relay coil 306 which in .turn energizes the return solenoid |98: The sole- Vruiiidllil' movesfthe valve' |10 'to vits return posi- `tion,.and low pressureV oil is then supplied as previously described to withdraw the'tool 26 from the spider,` to disengage the jaws 10 and 12 from Athe spider arms and to return the carriers or 'gplungers'and the jaws to their outermost positions.V Pressure at the switch 240 is reduced so that the contacts 240e thereof are separated but the relay coil 302 is not immediately de-energized v:as the said coil is connected in series with the mormallyengaged contacts 256i1 of the pressure switch 256. When the several parts have been 4fully moved to their return positions the pres- -fsu're at the switch 256 is increased sufliciently to'operate it, and the contacts 256EL thereof are Athereupon separated. This de-energizes therelay coil 302 which thereupon separates the contacts 302|. The separation of the contacts 302b `vpermits the valve"|88 to return to' its original position, thusV establishing a connection between 'the pipes 232 and 230. High pressure is thus 'released at the hydraulicv twisting units, and the low pressure voil is'permittedv to operate the said lunitsA as previously described so to return the v'twisting mechanism to its initial position.

flAs the result of the foregoing, Athe'parts'of ythe have been engaged with scribed-are then repeated.` l

lportionL th'ereof.

vmachine lare"restored to their original positions 'and the operator can'remove thetwisted spider from therlocatorand place an untwisted spider thereon. Thef various operations previously de- The operator rat any time during the cycle of operations can stop the functioning of the machine by openingthe emergency stop switch having the contacts 308 and 308e. At any time-during the forward movements of the several parts of the machine, the operatori can .operate the switch 300 to de-energize the forward relay coil 292 and the forward solenoid |96 and energize the return'relayA coil 306 and the return solenoid |98. When this isdone, the forward movements of the parts are stopped and the parts are moved to their return positions. f

During the twisting movements of the spider arms. the metal thereof is in a condition of ow yand the twisting movement is relatively slow and is continuous from the beginning thereof to 'the endv thereof. `By reason of the ilow condition of the metal and the steadyV continuous movement thereof, vthere is no tendency of the spider arms to untwist afterbeing released by .the jaws.

The jaws which engage opposite spider arms are exactly oppositei each other and are turned about axes which are exactly opposite and preferably exactly in alignment.. This. prevents Yany Ypossible circumferential shifting ofthe Vspider arms during twisting.

The extent of twisting'can be accurately de- -terminegiby the setting of the stops |52 and |54 as previously described.- The direction of twisting can 'bei c'hanged'bymanually changing the positionv of the reversing valve |48 and by correspondingly adjusting the stops |52 and'l54.

While the machine is primarilyintended for the twisting of previously untwisted spiders, it will beobvious that the machine may be used, if

desired, for increasing or decreasing the twist Yof previously twisted spiders. jbe done, oneof the stops |5201' |54 is so adjusted .that the carriers and jaws, when in their returned positions, are at angles corresponding to When this is to the angles to. which the ,spider arms were previously twisted. Theother stop is set to deter- '.minefthe amount of additional twisting or untwisting which is required.

The invention claimed is:

1. In a machine for twisting fan spiders each having a central portionv and a plurality of angu- .larlyspaced arms extending outward therefrom,

the combination of means-for clamping the cen- .tral portion of a spider to hold it in a fixed hori- .zontal position, a plurality of carriers movable horizontally inward and outward and correspond- `ing in numberand in` angular spacing to the spider arms, a pair of gripping jaws individual to and mounted onthe inner end portion of each carrienmechanism'for. moving the several car- -riers inward tov bring the jaws of the correspond- Ving pairs into opposed gripping relationship with the respective spider arms, mechanism for relativelymoving the' jaws of the said pairs when in their said grippingrelationship to cause them to grip the respective spider arms, and mechanism operable With the jaws in gripping engagelmentfor turning the said Vcarriers and jaws in Agripping engagement for turning the )said carriers and jaws about horizontal axes to twist thearms of the spider relatively to the central gipln amachine. for twisting `fan spiders each -having'a centralportion and-,a plurality of'langularly spaced arms extending outward therefrom, the combination of means for clamping the central portion of a spider to hold it in a iixed horizontal position, a plurality of carriers movable horizontally inward and loutward and corresponding in number and in angular spacing to the spider arms, a pair of gripping jaws individual to and mounted on the inner end portion of each carrier, mechanism operable independently of the clamping means for moving the several. carriers inward to bring the jaws of the .corresponding pairs into opposed gripping rela- -tionship with the respective spider arms, means normally dependent upon the prior action of the clamping means for actuating the last said mechanism, mechanism for relatively moving the '.iaws.` of the said pairs when in their said gripping relationship to cause them to grip the respective spider arms, and mechanism operable -with the jaws in gripping engagement for turning the said carriers and jaws about horizontal axes to twist thearms Vof the spider relatively to the central portion thereof.

3. In a machine for twisting fan spiders each having a central portion and a plurality of angularly spaced arms extending outward therefrom, the combination of means for clamping the central portion of a spider to hold it in a iixed horizontal `position, a plurality of carriers movable horizontally inward and outward and corre- -sponding in number and in rangular spacing to .the spider arms, a pair of gripping jaws individual to and mounted on the inner end portion -of each carrier, mechanism for moving the several carriers inward to bring the jaws of the corresponding pairs into opposed gripping relationship with the respective spider arms, mechanism operable independently of the jaw and carrier moving mechanism for relatively moving the -jaws of the said pairs when in their said gripping relationship to cause them to grip the respective spider arms, means dependent on the prior inward movement of the carriers and jaws for actuating the last said mechanism, and 'mechanism operable with the jaws in gripping Vvengagement for turning the said 4carriers Yand `laws about horizontal 'axes to twist the Varms of the spider relatively to the 'central portion thereof.

4. In a machine for vtwisting fanspiders each `havinga central portion and a plurality of angularly spaced arms extending outward therefrom, the combination of means for clamping the central portion of a spider to hold it in a xed horizontal position, a plurality of carriers movable horizontally inward and outward and-corresponding in number and in angular spacing -to the spider arms, a pair of gripping jaws individual to and mounted on the inner end portion of each carrier, mechanism for moving the sev- `eral carriers inward to bring the jaws of the corresponding pairs into opposed gripping relationship with the respective spider arms, mechanism forv relatively moving the jaws of the said pairs when in their said gripping relationship to cause them to grip the respective spider arms, mechanism operable with the jaws in gripping engagement and operable .independently of the.

jaw moving mechanism for turning the Vsaid carriers and jaws about horizontal axes to twist the-arms of the spider relatively to the central portion thereof, and means normally dependent upon the prior action of the jaw .movngmechanism forY operatingy the mechanism flor turning the carriers andjaws.'V 'Y 5. In a machine for twisting fan spiders-each having a central portion and a plurality of angularly spaced arms-extendingl outward therefrom, the combination of means for clamping the central portion of a spider to hold it ina fixedfhorizontal position, a plurality of carriers movable horizontally inward and outward and corresponding in number and in angular spacing to the spider arms, a pair of gripping Jaws indi.- vidual to and mounted. on the inner end portion of each carrier, mechanism operable independently of the clamping means for moving the several carriers inwardly to bring the jaws of the corresponding pairs into opposed gripping relationship with the respective spider arms, means normally dependent upon the priorl action of the clamping means for actuating the last said mechanism, mechanism operable independently of the jaw and carrier moving mechanism for relatively moving the jaws of the said pairs when in their said gripping relationship to cause them to grip the respective spider arms, means dependent on the prior inward movement of the carriers and jaws for actuating the last said mechanism, and' mechanism operable with y,the jaws in gripping engagement for turning the said carriers and jaws about horizontal axes to twist the arms of the spider relatively to'the central portion thereof. s

6. In a machine for twisting fan spiders each having a central portion and a plurality of angularly spaced arms extending youtward therefrom. the combination of means for clamping the ccntral portion of a spider to hold it ina iixed horizontal position, a plurality of carriers movable horizontally inward and outward and corresponding in number and in angular spacing to the spider arms, a pair of gripping jaws individual to andmounted on the inner end portion of each carrier, mechanism for moving the several carriers inward to bring the jaws of the corresponding pairs into opposed gripping-rela.- tionship with the respective spider arms, mechanism operable independently of the jaw and lcarrier moving mechanism for relatively moving the jaws of the said pairs when in their said gripping relationship to cause them to ,grip v the respective spider arms, means'dependent on the prior inward movement of the carriers andiaws for actuating the last said mechanism, mechanism operable with the jaws in gripping engagement and .operable independently of the 'jaw moving mechanism for turningv the said carriers and jaws about horizontal axes to twist the arms vof the spider relatively to the central portion thereof, and means normally dependent upon the prior action of the jaw moving mechanism for `operating the mechanism for turning vthe carriers and jaws. Y

7. Ina machine for twisting fan spiders Ieach having a central portion and a plurality of angularly spaced arms extending outward therefrom, the combination of means for clamping the central portion of a vspider'to hold itin aiixedghorizontal position, a plurality 0f carriers movable horizontally inward. and outward and CQii'esponding in number and in angular lspacng to the spider arms, a pair of gripping jaws-indi'- vidual to and mounted on theinner end portion of each carrier, mechanism for moving the' several carriers inwardvand outward, meansacting successively ,to operate .theclamping mcanSi-n the forward 'directionrso as lto eiect lrnning 21 and tocperate the carriermovingmechanism in'theforward direction so as to bringthe jaws into opposed gripping relationshiprwith theA respective spider arms and to operate the jaw moving mechanism in the forwardl direction so as to cause the jaws to grip the respectivespider arms and to operate the carrier turning mechanism in the forward directionso asto cause the jaws to twist the` spider arms, and meansl subsequently acting successively uto v.operate the clamping means in theoreturnddirectionLto release the spider and to operate the jaw movmg mechanism in the return direction soas to re-A lease-the spider arms and to operate the carrier moving mechanism in the return direction so as to move the jaws out of grippingA relationship with the spider arms and to operate the carrier turning mechanism in the return direction so as to restore the carriers and jaws to their initial rotative positions. e o y v 8. A machine for twisting fan spiders asset forth in claim 7, wherein means is provided which normally serves to prevent the return movement of the carrier turning mechanism until aiter the' it to move the tool downward to clamp the spider,

a plurality of carriers movable horizontally inward and outward and corresponding in number and in angular spacing to the spider arms, a pairA of ygripping jaws individual to and mounteduon the Linner end portion of each carrier, a plurality of hydraulic units for moving the several carriers, means for supplying oil under pressure to the last said hydraulic units to cause themy ,toy

move the several carriersV inward and to thereby bring the jaws of the correspondingpairs into gripping relationship with thevrespective spider. arms, means causing the last said oil supplying means to be dependent for its operation upon the prior application to the first said hydraulic unit of oilpressure suicient to effect clamping, mechanism for 'relatively moving the jaws of the said pairs when `in 1their said gripping relationship to cause them to grip the respective spider arms, and mechanism operable with the jaws in gripping engagement for turning the said carriers and Jaws about horizontal axes ,to twist the arms ,ofthe spider relatively to `the central portion thereof.

10. In a machine for twisting fanspiders each having a central portion and a plurality of angularly spaced arms extending outward therefrom, the combination of means for clamping the central portion of a spider to hold it in a ilxedhorizontal position, a plurality of carriers movable horizontally inward and outward and corresponding innumber and inangular spacing Atothe spider arms, a pair of gripping jaws individual to and mounted on the inner end portion ofV each carrier, a plurality of hydraulic unitsy for moving the several carriers, meansfor supplying oil under relatively low pressure to the hydraulic units to cause them to move the carriers inward and .to

thereby bring the jaws of the corresponding pairs. into opposed gripping relationship,v with the re. spectivespider arms, means dependent upon the` movement ofthe carriers approximatelyto theirinner positions for applying a relatively rhigh pressure tothe oilV in the hydraulic units so as to rmly hold the carriers in their said inner positions, mechanism for relatively moving 4the jaws of the said pairs when `in their said gripping relationship to cause them to grip the respective spider arms, and mechanism operable with-the jaws in gripping engagement for turning, the said carriers and jaws about horizontal axes to twist: the arms of the spider relatively towthe central.

' portion thereof.v 1

11.*,1n a machine `for twisting fan spiders each. having a central portion and a plurality of angu-4 larly spaced arms extending outward therefrom: the combination of means for clamping the c'en-.l tral portion ofka spider to hold it in a xed hori zontal position, a plurality of carriers movable horizontally inward and outward and correspond-I ing in number` and in angular spacing yto theV spider-arms, apair of gripping jaws individual tol and mounted on theinner end portion of each carrier, a plurality of hydraulic units'for moving the several carriers, means for supplying oil under relatively low pressure to the hydraulic units to cause them to move the carriers inward and to' thereby bring the jaws of the corresponding pairs into opposed gripping relationship withfthe-re-V spective spider arms, a plurality of normally open electricswitches connected in series, means for* closing the respective switches by the several car-l riers upon movement thereof approximately to" their inner Y positions, an electrically operated'A valve `connected in series with the switches: the

said valve serving upon the closing of all ofthe'` Y switches to apply a relatively highpressure totheJ oil in the hydraulic units so as to `firmly hold the carriers in their inner positions, mechanism forV relatively moving the jaws of thesaid pairs whenin their said gripping relationship to cause themto grip the respective spider arms, yand mechanism operable with the jaws in gripping engage-I ment for turning the said carriers and jaws about horizontal axes to twist the.` arms of the spider relatively to the central portion thereof. Y Y f l2. In a machine for. twisting fan yspiders each having a central portion and a plurality of angularly spaced arms extending outwardtherefrom, the combination of means for clamping the central portion of-a spider to hold it in a -flxed horizontal position, a plurality of carriers movable horizontally inward and outward and correspond-v ing in number and in angular spacing to they spider arms, a-pair of gripping jaws individual to and mountedA on the inner end portion of each carrier, mechanism formoving the several car-` riers inwardto bring the jaws of the corresponding pairs into opposed gripping relationship with the respective spider arms, aplurality of hydraune units for relatively moving the jaws of the said*- pairsmeans for supplying oil under pressure to* the said hydraulic units to cause them to rela-f tively move the jaws of the said pairs to causeI them to grip the respective spider arms, means' causing the said oil supplying means to be de-' pendent for its operation 'uponA the prior movement of the carriers and jaws to their inner positions, and mechanism operable with the jaws in gripping engagement for turning the said carriers and jaws about horizontal axes to twist the arms of the spider relatively to the lcentral portion thereof. l

13. In a machine for twisting fan spiders each having a central portion and a plurality of an# gularly spaced armsextendingoutwardl 'there-;

from; @mei-compitiendo lofiincase`v for damping thecentra'l'portion oflaspidertoholdlit ina 'iied-` horizontal? position, a plurali-typt? carriers-inevablehorizontally inward and'V outward/and corresponding: in number and iins'angular* spacing 'to the; spider-arms. apair of1 gripping; jaws indi-- vidual itc.- andmounted on' tha inner` end-portion oifeac'lr carrier; mechanism Yfor Ymoving -thessev-v eral carriers."inward to- -bring the-- jaws2 of thel corresponding ,pairsJ into opposed' gripping relationship avith ,the :respectiva spider arms; a-p1u rality of hydraulic units for relativelymoving. theigiaws:ofthe-said-pairs; a plurality:of'fnormally' open:electric?switchesiassociated with therespec- 'tivercarriersand connected? in series; means aforiolosing; the several; switches byl the' respectivel lcarriersnipon movementithereof approximately-to t: grip;.-the1 respectiverspiderarms,A andY mecha nisrnioperablefwith the jaws .in gripping engage-- mentfforgturningithesaidparriers fand jaws about' horizontaliaxes.- toxtwistlthearms of the spider relatively' to theaV central, portion thereof.

14;. ,-azmachinefor twisting fan spiders Aeachy haring :a centralportion; andra plurality of an gularly Aspaced?` armsnextendingf. outward. therefrom; theV combination; of means-ior Y,clampingthe; central portionpf.; a; spider# to'lhold Eit in= a fixeddiorizontal.,position; apluralityofcarriers movablel horizontally .1 inwardf and'. outward andcorrespondingfin number.:.and':in angular spacingA to; the'r spider; arms; a pair. ofgrippingrjaw-s indi--Y v-idual toY and'. mountedon thezinnenend portion orf-:eachfcarrier.;` mechanism for moving the-several carriers;- inward;y to; bring.'` theV jaws ofE the correspondingpairs into-opposed gripping relationship; with theI respective'spider armsf mecha--V nismxi'or relatively movingthejaws of the said pairswhen in their said gripping relationship kto cause them to grip thelrespective spider'jarms, ay hydraulicunit for turningfthe saidcarriers .and

jaws-labouthorizonta'laxes 1 to ttwist the arms ofthefspider: relatively tofthe;.centralportion there'- .of, and means normally dependent 'upon the prior A action of thejaw moving mechanism for supply-V ingg oilnnder' pressure :to .the said hydraulicunit L toccauseit to turn lthe carriers andtjzalws lastafore said.

15.*- 1naimachinerior:twistinggfanfspiders eachv havingza central portion and a pluralityofangualarlyA spaced arms extendinggj outward therefrom, thev combination of means Y ior Vclamping thecentralportion of aspiderto hold itin aixed horizontal position; afplurality of carriers movablev horiZonta-llyinward and outward 'andcorrespondf ing,in.number andinangular spacing tothe spider arms,- apair of gripping jawsindivi'dual ,tot and. j mountedonfthe., inner end portionA of eachJ carrier, mechanism-.for'moving the several car-Y riers inward tobringj thejawsof the correspond ingpai1s ,into Aopposed :gripping relationship with the respective .spider arms, aY-plurality of-hydraulicz units ,for relativelymovingthe Y jaws -of the said-pairs,l means ,fon supplying -oil underfpres sure. tothey said hydraulicaunits to cause them totv relatively :move the jaws-tocause themato 'gripe the respective spider arms, a hydraulic unit for;

turningthe said carriers and jaws-aboutizhorizontal axes to twist the arms-of the spideryrelai-y tivelyY to thet central vportion thereof;` meansgfor.4

tion` upon the prior application to the-first saidl` hydraulic 4uriitslofy oil n pressuresufilcient toeiectv gripping: Y

i6: In arf-machine-'foritwisting fan spiders eachI havingaicentral"portion and a-plurality offangu larl'y spaced arms-extending outward therefrom;- theY combina-tion of means Vfor clamping the centra-llportion-oia-r spidereto holdit in a fixed-V horizontal 'position/,- a' plurality` of carriers lmovable horizontally'inward and'outward and correspondingn in num-ber f andinV angular spacing A to the spider'arrns; apairof gripping jaws individualfto i-andflmounted'iorrthe 'innerend 'portion of each carrier, mechanism for'moving; the several" carriersrinward 4to `lbringitherjaws Yof the corresponding pairs-into-'opposedgripping relationshipl with the respective 'spider arms, aVplurality-'of hydraulic units y for relatively moving the jaws of thesaid pairsmeans f0rsupplying oil-'under pressure 'to the said vhydraul-icunits tocause them to relativelymovethejaws toY cause themto `grip the respective' spider arms, means causing thesaid oilsupplying means tobe dependent for'its operation uponv the "-prior'movement ofv the carriers andljawsf-to their innerl positions, ahydraulic unit frm-turning' the said carriers and jaws "about horizontal-axes to- =twisttheA arms; of y the spider'- relativelytofthe)central-portion thereof; means for@ supplyingl oil lunder pressure 4to the last said hydraulicunit; 'and means causing; the lastl saidi oil'supplyingfmeans-to=bedependentffcr itsfoperation-uponftheI priorfapplication to the` rst said' hydiaulic-unitsof foil-v pressure suilicient to effect gripping? v 17;" In asmacliinevforltwistingfan spiders each` having afcental portion` and aplurality of angu larlyspaced varms eXtendin-gyoutward therefrom, thef-combinationpf-"a locatorfror engaging thel bottbmoithecentral portion of a spider, a clamp-- ingt toolaljove-'the locator," a hydraulic unit for moving the =clamping ftool, aplurality A of carriers` movable horizontally: inward and outward and corresponding: in number `andy in angular Ispacing toSthe1spiderarms, a pai-r opgrippingj'aws individual to and `Vmounted`l onithe. inner end Yportion ofl eachcarrier; a pluralitylofhydraulicunita ior'frr'ioving-y th'e: several carriers, al plurality :of hydraulic units lfor relativelyvmoving` the." jaws-of the-saidA pairs when' in` their saidf gripping rela'- tionshipitogrip'; thejrespective spider arms, a. hydraulic unit operablewith theijaws in grip-l ping; engagement for turningf the said carriers and'. jaws .about v'horizontal axes,- means includ'-J ingpipes and valves vfor supplying oil under pres sure .to' alli .of 'the hydraulicz units ,to cause them toact: successively .inthe forwardA directionsl to move'. the 'clamping tool into engagement with thelgspideriand"to-move .the several carriers in ward so= as toxbring'ithe jawsy into L gripping` relationship; with the spider arms and to i relativelyl moveithe rjaws; of the/saidxpairs to'cause .themA to-'gripthefrespective .spider arms and ytoA turn ther'carrierszsonas:tocause i-,hejawsto twist the spider-farms;v means fin'cluding..V pipes Y and yvalves for "supplying" oiliunder pressure to all of theV hydraulicunits to causefthem. to: actsuccessively inxthe freturnfdirectiOnsLtoH move the clamping tool-f out*- of. engagement I with" the .spider and to relatively-move thezjaws. of the said pairs -to canse' themttogreleasewthe respective. spider 'arms and tournove4 the.i several carriers `'outward' -so astoobringrthee jawn-out roflgrippingrelationshipV 25 'with' the spider arms and -tof turn the carriers in the opposite direction to restore the carriers and jaws to their initial rotative positions, and a main valve having forward and return positions for causing the two said forward andreturn oil supplying means to act alternately.

18. A machine for twisting fan spiders as set forth in claim 17, wherein an electrical pressure switch is provided operable by increased pressure resulting from the completion of movement of the hydraulic unit for turning the lcarriers and jaws, and wherein means is provided Iwhich iscontrolled by the pressure switch and which serves after the operation thereof to move the main 'valve from its forward position toits return position.

V19. A machine for twisting fan spiders as set forthin claim 1'7, wherein the rst said oil supplying means includes an electrically operated valve, wherein an electrical pressure switch is provided operable by increased pressure resulting fromv the completion of movement of the hydraulic units for relatively moving the jaws, wherein means is provided which is controlled by the pressure switch and which serves to operate the last said valve to supply oil in the forward direction to the hydraulic unit for turning the carriers and jaws, wherein a second electrical pressure switch is provided operable by increased pressure result- 'ing from the completion of movement of the hydraulic unit for turning the carriers and jaws,

and wherein means is provided which is controlled by the second pressure switch and which serves after the operation thereof to move the main valve from its forward position to its return position.

20. A machine for twisting fan spiders as set forth in claim 19, wherein a third electrical pressure switch is provided operable by increased pressure resulting from the completion of the return movements of all of the hydraulic units except that for turning the carriers and jaws, and wherein means is provided which is controlled by the last said pressure switch and which serves upon the operation thereof -to operate the said valve in the iirst said oil supplying means to release the pressure previously applied to the hydraulic unit for turning the carriers and jaws and to thereby permit the last said unit to operate in the return direction.

21. In a machine for twisting fan spiders each having a centrally apertured central portion and a plurality of angularly spaced arms extending outwardly therefrom, the combination of a spider locator having an upper face for engaging the bottom of the central portion of a spider which locator has a central stud projecting above the said upper face for entering and tting thecentral spider aperture, a clamping tool above the said locator, means for moving the clamping tool downward to engage it with the said central spider portion so `as to clamp the spider in its v said position on the locator, a plurality of car-` riers corresponding in number and in angular zontally inward to bring the jaws of the said ,pairs into opposed gripping relationship with the 'respective spider arms, means carried by at least oneof the carriers 'for engaging the sides of the corresponding spideri arm as the carrierv l,moves fjinw'ard-which means serves to turn'thespider se tagesgeld te seeehr www. 10Q-eist@ in an'gular spacing to thesp'ider arms, apair-of gripping jaws individual to and mounte''l'4 onthe spider in a predetermined angular position, mechanism operable after inward movement of 'the carriers and jaws for relatively moving the jaws of the said pairs when in their said gripping relationship to4 cause them to grip the respective 4spider arms, and mechanism operable with vthe angular position is carried by a jaw ofY at least one of the said pairs.

23. In a machine for twisting fan spiders each having a centrally apertured central portion and a plurality of angularly spaced arms extending outward therefrom, the combination of a=spider locator having an upper face for engagingthe bottom of the central portion of a spider which locator has a central stud projecting above the said upper face for entering and fitting the central spider aperture and has means projecting above the said upper face for engaging the spider arms to at least approximately locate the spider in a predetermined angular position, a-clamping tool above the said locator, means for moving the clamping tool downward to engage it with the said central spider portion so as to clamp the spider in its said position on the 1ocator, -a plurality of carriers corresponding in number-and inv angular spacing to the spider arms; ay pair-gef gripping jaws individual'to and mounted on-the inner end portion of each carrier,mechanisrn for moving the several carriers and-pairs of jaws horizontally inward to bring the jaws of the said vpairs into opposed gripping relationship with-the respective spider arms, mechanism operable `atte-5r inward movement'of i' the carriers and 'jaws f or -relatively moving the jaws of the said pairs when in their Said gripping relationship to cause them to grip the respective'spiderarms, and mecha'- nism operable 'with thejaws in gripping. engage'- ment for turning the said carriersl and' jaws about horizontal axes to twist'the arms ofthe spider relatively tothe centralportion'thereof. i

: 24. In a machine for twisting fan 'spiders each having a centrally apertured central portiori'an'd a-plurality of angularl'yspaced armsfextending outward therefrom, the combination of a spider locator havingan upper face forte'ngaging'the bottom of the central portion of a spider which locator has a'central fstudp'rojecting abovethe said upper face for enteringand tting the central spider aperture andhas means projecting above the said upper face rfor engaging the spider arms to approximately locate the spiderin apredetermined angular position, a clamping tool above the said locator, means for moving'kt'he clamping tool, downward to engageV it withfthe said central spider portion so as to clamp the spider in its said position on thelocator, apluralityV of carriers corresponding in number'and inner end portion of, .each carrier mechanism forl moving the several carriers andpairaofaws horizontally inward to bring thejaws of th said pairs into opposed gripping relationship withfthe respective spiderarms, means carried bylatle'ast inward which means serves to turn the "spiderlfon `the stud and :to thereby 'rfaccurately locate "th'e ispiderinf its said vpredetermined lposition, r-means ^loper-able after inward-'movement of the carriers "aridfjawsvfor relatively'moving the jaws of the fa's'ai'dlpairs' 'when in f' their said gripping relationship -to'cause'them to `grip the Vrespective 'spider 'Sai-ms, landmechanism operable with the fjaws in @gripping `engagement 'forv turning the said lcarrlers'an'dj'aws abouthorizontal axes totwist the arms of the spider relatively to the central por- Iltionth'ereof.

.525. l'In-a machinefortwisting fan spiders Veach "having'ia centrally I apertured central portion and 3Aapluralityof ang-ularly spaced arms extending outwardth'erefrom, the'combination-'of a spider locator having an upper face`for engagingthe :bottom -of..the central portion of 1a spider which lcatorfhas a centralT stud for entering-andtting .fth'e central" spiderlaperture, a clamping toolabove thef-said `locator,means for moving the clamping ltoladownward to cause it to applyV a relatively "lowpressure to 'the topof the central spider por- -tlon ^so Las '-to lightly 'clamp 'the spider on the locator, aplurality of carriers corresponding in nmb'erffand'-in-angular spacing vto vthe spider -arms,'`a"pair of gripping jawsindividual to and Tmounted-v on the inner end portion of each carf'rler, mechanism for moving the several carriers fan'dipalrsof jaws horizontally inward to'bring fth'e jaws' ofthe said pairs into opposed-gripping "relationship `-with the respective -spider arms, Imeans'carridfbyfat least one of the carriers for l'engagin'g the sides of the corresponding spider larm as the 'carrier moves inward 'which 'means se'rve's to turn the spider on the lstud and toi l '-tlierebyaccurately locate' the spiderk in a lprede- ?terminedangularposition, means' operable after illirward movement ofthe carriers Land jawsfor l:causing the clamping'toolto apply Va relatively '.'highpre's'sureto`the1`spider^tormly clamp it in lits said-'predetermined position, mechanism oper- Iabie after inward .movement of the' carriersV and r-,iaws fforfrelativelymcving the jaws of the said pairsfwhen .lntheir Said-'gripping relationship to cause them togrip the'srespective' spider arms, iandfmechanism operable with thev jaws ingriplfping` engagement for turning the said lcarriers and jaws' abouthorizontalaxes to twist 'the arms -of Vthe spider-'relatively to the centralportion =thereof.

+26. A machine for twisting fan spiders asset A:forth in-claim .25, wherein the spider locator has-means projecting above the upper face thereof-forengaging the spider Varms to' atleast ap- C proximately:locate the spider in the said predetermined-angular position prior to .the en- ...gagement of `the clamping tool with the spider.

27. .A machine fortwisting fan spiders as set forth .in.claiml25, wherein marking projections are provided whichengageat-least one -face of vvthe spider when it is lightly clamped between "'the'locator and .the clampingr tool which projections' 'are of such character that the light clamp- "ingpressuredoes not cause them to enter and .'rrfark the spider and are of such character that they'en'ter'and'mark the spider when relatively `high`"pressure is "applied to vthe spider vby .the -"clampingool *28. `A 'machine for 'twisting fan. spidersas set forth'in'claim' 25, wherein a plurality of control de'vlce's'is, provided `for'actuating the said means fior-causing theclampingtool to apply arelatively"highfpres'sure to'the spider,'the said .control "devicesb'eing 'operated bythe respective carriers *"Up'n. movement' thereof approximately .to Vtheir' "innermostpsi'tions andthe said control devices' 28 :actuating the lastesaid .means .only '-whenz-allzof them have .beenisoroperated 29.1n va .machine for twisting -.fa;n spiders eachv havinga centrally apertured central portion `and a pluralityotfangularly spaced'arrnsextending outward therefrom, .the-.combinationxof Aa -spider `locator havingran upper facev for fengaging .the bottom of the vcentral portion .of a.- spider which-locator has .-a/central stud for entering 'and fitting the centralspideraperture, ai clamping toolabove'thefsaid locator, acylinder and pistoni-unit Yfor .moving the clamping tool vertically, meansfor supplying oil .under low. pressure Ato causethe piston 'of the-saidy :unit to Y.movethe vclampingtool downward'to causeiit-to apply a relatively low pressure to the top of the central -spider portion :solas to .lightly clamp .the .spider .on'thexlocaton .a ,plurality vof .carriers corresponding..inmumber .and in angular spacing to .the spiderarmsfapair of gripping ljaws .individual to and mountedon. the .inner .endpor- .tion of eachv carrier,--mechanism for .moving the several carriers and .pairs `of jaws horizontally .inward vto bring Vthe jaws of the'said pairs .into voizvposedgripping relationship with the respective spider arms, means carried by at least one of the carriers for lengaging'the sides of the rcorresponding spider :armas the carrier moves inward which means serves `to turn 'the spider on thestud and to thereby accurately locate the spider in a predetermined angular position, means operable after. inward movement of the carriers and jaws for applying a relativelyihigh pressure to the oil in .the cylinder and piston unit for causing thel clamping tool to applyna relatively high pressure to the spider to firmly clamp it in its said predetermined position, .mechanism operable afterv inward movement .of the vcarriers andjaws for relatively. moving .the jaws of thesaid pairs tocause them to grip. the respective spider .arms'and -mechanism voperable with the jaws in gripping-engagement lfor turning the said carriers and jaws about horizontal axes to twist the .arms of the spider relatively to the central portion thereof.

30. .In a machine for twisting fan spiders each having acentrallyapertured central portion and a plurality of angularly spaced arms extending outward therefrom, the combination of a spider locator having an upper face for engaging .the vbottom 'of the centralportion of .va spider which locator has .a central stud for entering Aand .-tting the central spider aperture, a Aclamping tool abovethe said locator, a cylinder andpiston unitformoving the clamping tool vertically, means forsupplying oil under `low pressure `to cause ythe vpiston of the said unit to move the clamping tool downward and to cause it to apply `a relatively low pressure .to the .top ofthe -central spider portion .so as to lightly clamp ythe spideron .the locator, ,a` plurality of. carriers corresponding .in .number and in `angular ,spacing to the ,spider.arms,.a pair of gripping jaws individual to andmountedonvthe inner end .portion. of each carrier, .mechanism .for moving .the several carriers .and pairs of jaws horizontally inward to bring the .jaws ofthe said pairs .into opposed grippingrelationship with therespective spider arms, means carried by at leastone of the carriers for engaging the sides lof .the corresponding spider arm as the tcarrier moves inward :which means 'SerVes to turn the. spider `on`the .stud and to "thereby accuratelyj locate fthe "spider in a predetermined'angular"position,

agplurality Aof control devices operated Ybythe "respective carriers rupon 'movement `Jthereof laliproximatelyto their innermostl positions, means actuated by the control devices when all of them have been operated and thereupon serving to apply a relatively high .pressure to the oil in the cylinder and piston unit for causing the'clamping tool to apply a relatively high pressure to the spider so as to iirmly clamp it in its said predetermined position, mechanism operable after inward movement'of the carriers and jaws for relatively moving' the jaws'of the said pairs to cause them to grip the respective spider arms, and -mechanism' operable lwith Jthe jaws in gripping engagement for -turning the said carriers and' jaws abouthorizontal axes: to twist the arms of the spiderrelatively to theY central portion'thereof.'

31. In a machine for twisting fan spiders each having a central portion and a plurality lof angularly spaced arms extending outward there-- from, the combination of means for clamping .the central portion of a spider to hold-it in a fixed horizontal position, a plurality of carriers corresponding in number -and in angular spacing to the spider arms, a plurality of gripping jaws mounted on the inner end portions .of the respective carriers and in iixed relation thereto, a second `pluralityof jawsA mounted, on the inner end portions of the respective carriers and located respectively vin opposed relationship .to the rst said jaws, the second said jaws being pivoted to the respective carriers for movement about transverse horizontal axes, mechanism for moving the several carriers and the corresponding jawsl horizontallyinward to bring theVv jaws into opposed gripping relationship with the .respective spider arms, mechanism operable when the jaws are in their said .gripping relationship for moving the second said jaws about their pivotal axes to grip ,the respective'spider arms, and mechanism operable with the jaws in gripping engagement `forturning thesaid carriers `and jaws about horizontal axes to twist the arms thereof.v Y y 32. In--a machine for twisting fan spiders. each havingf'av central portion and a pluralityf of angularly spaced arms extending outward therefrom, the combination of means for clamping the central portion of a spider to hold it in a iixed horizontal position, a plurality of carriers corresponding in number and in angular spacing to the spider arms, a plurality of gripping jaws at the inner endl portions of the respective carriers and in fixed `relation thereto, a second plurality of jaws at the inner end portion-sof the respective carriers and located respectively in opposed relationship'to the iirst saidv jaws, 'the second said jaws being pivoted to therespecvtive carriers for movement` about transverse horizontal axes, mechanism for moving the several carriers and the corresponding jaws horizontally inward to bring the jaws into opposed gripping relationship with the respective spider arms, hydraulic units associated with the respective carriers for moving the second said jaws about their pivotal axes to grip the respective spider arms, means for supplying oil under pressure to the said units to cause them to move the jaws as aforesaid when the carriers have been moved inward to bring the jaws into the said relationship with the spider-arms, and mechanism operable Ywith the jaws in gripping engagement for turning the said carriers and jaws about horizontal axes to twist the arms of the spider relatively to the central portion thereof.

kof the spider relatively to the central portion 33. In amachlne for twisting fan spiders each havingV a central portionv and a plurality' kof angularly spaced arms extending outward therefrom, the combination of -means for clamping the central portion of a spider to hold it in a xed horizontal position, a plurality of carriers corresponding in number and in angular. spacing; to the spider arms, a plurality of gripping jaws; at the inner end portions of thelrespective carriers and in iixed relation thereto, -a second. plurality of jaws at the inner end portions vof: the respective carriers and located respectively lirr opposed relationship to the iirst saidjaws, the: second said jaws being pivoted tothe respective` carriers for movement about transverse hori-I zontal axes, mechanism ior moving the several.

carriers and the corresponding jaws-horizontally' inward to bring the jaws into opposed gripping relationship with the respective spider arms mechanisms associated with the respective ca rriers and each comprising a cylinder and piston unit and an inwardly movable plunger having a cam face for moving the corresponding pivoted jaw into gripping engagement with the corre.- sponding spider arm, means for supplying oil under pressure to the said units to cause them to move the jaws as aforesaid when the carriers have been moved inward to bring the jaws into the said relationship with the spider arms, and mechanism operable with the jaws in gripping engagement for turning the said carriers and jaws about horizontal axes to twist. the arms of the spider relatively to the central portion4 thereof. I n

34. In a machine for twisting ian spiders each having a central portion and a plurality of angularly spaced arms extending outward therefrom, the combination of means for clamping the central portion of a spider to hold it ina fixed horizontal position, a plurality of carriers movable horizontally inward andr'outward and corresponding in number and in angularV spacing to the spider arms, a pair of gripping jaws individual to and mounted onthe inner end vportion of each' carrier, mechanism for moving the several carriers inward to bring the jawslofthe corresponding pairs into opposed gripping,v relationship with the respective spider arms, mechanism for relatively moving the jaws of the said pairs when in their said gripping relationship to cause them to grip the respective spider arms, mechanism operable with the jaws in gripping engagement for turning the said carriers and jaws about horizontal axes to twist the arms of the spider relatively to the central portion thereof, and adjustable means for limiting the extent of movement of the last said mechanism to vary the angles of twisting of the spider arms. Y Y y y* 35. In a machine for twisting fan spiders each having a central portion and a plurality of angularly spaced arms extending outward therefrom, the combination of means for clamping the cenl tral portion of a spider to hold it in a iixed horizontal position, a plurality vof carriers movable horizontally inwardand outward and corresponding in number and in angular spacing to the spider arms, a pair of gripping jaws individual to and mounted on the inner end portion of each carrier, mechanism for moving the several carriers inward to bring the jaws of the corresponding pairs into opposed gripping relationship with`

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