US2732139A - shaff - Google Patents

Description

Jan. 24, 1956 E. H. SHAFF TOOL FOR APPLYING A CONDUCTOR TO A TERMINAL Filed April 4, 1952 2 Sheets-Sheet 1 Jan. 24, 1956 E. H. SHAFF TOOL FOR APPLYING A CONDUCTOR TO A TERMINAL 2 Sheets-Sheet 2 Filed April 4, 1952 CJQDO Nvsrvrok, svneuk Qfhqfr T001). A @QNDUCTQR To A signments, t Ga ing-D nver 'Qe i aii a'e pera eti of Delaware Arnfieafieu Audi. 4,. A952,. Ser al Ne: 1280,55 1. C ms- (6. 2 -7) -p e p ea i aSer a f e-"' QSAQLfiL d Nevemr 4 ber 30, 1950 now abandoned,

It is a er l Qbieet q the a emien. to provid a wire coiling or wrapping mechanism especially con d to feeilitete he n er i n. inte its t p. Qt the Wi e te be pp d, n t p r or the wra ng eperefien peedily and effectually.

Another iee lie n. the p isien in a 201 oi the goin e e ef means efiee iv 1 9 .4 h lt r minal against twisting as the conductor is wrapped t ghtly about it. A

Still another object oi the invention is to provide in a wire. r pp teel me ns. er a pl n du t is; n e on a d e m Pe t a at -ele te P nea r t us na in he ep li etiea ef. e p. 1 of eendueters o the t r fi el e er! x a l s ee'ed ti ne thereof. A g

A u h r re ne i e biee s t r -tee in. e tool of this type having gonductor regeivin'g ineans which is rotatable with respect to the terminal receiving means, means to insure resetting of the former with respect to y ide vat enel i artly in isl o the to l. llustrat d the pree dmsfieures a pt e l te a erminal pest n sh... .ngaw r ein'e-wrei iied abeu it- 5 i s at to i 4? but omp ises t at en retie the ppli e io q e 1 post received. th t p pe etien tak n subs aat l n the F 6. is a. tra p1ane9t iae Fig at an... etan ie ly tberlti ie. Qt l. .e' z-fl e' i 1 Fig. 8 is a fragmentary longitudinal section .ot a QQd if tied. form .o t p. nertienef ea embod ng fe ures of the ns ant ia iee Pie 9 i a erse se tien. aken subs an ll in h P an 9 line a B 8- Fles- .1 tl 1 ate-enei'e evat ne iew o l. 91 o .medified te m-9t t p port on and. .resp e iv ly i ust .e t ve. o pone t elationship n d iete t. an lar esit eas thereet, F 2 a r gmentar e pl ed ers eetiv view f the mo fied ti P 11 in. F 10 a d t ausyerse s etie i taken set t en t ere ereeh n in the dra ings am. wi l he in be. eti ed iu det i he are: tented embod s b it is etthe eb a th 'in ent eu ter the. o ms e le e ed, "but it. isintended t e e all med fieethe latter to the same relative initial angular position A related object ijs'toprovide a constructign and arrangernent by rheans of :whi"ch the initial angular position of the conductor receiiiingjmeans 'with'respeet to the tool: axis can be readilyadjusted according to the convenience of the operator using the toot.

It is also an object of the invention to provide in a e pp ng b et ns a ne er unit and e wrap in unit, a n ll disen ge slr vies eenaeet pn b t een su h units Wh e i en er d e cti e. an ineieieim. t the application of powe .6 act 7 n ber' e i t i to P eu e time fere 9n' l lot pp un t r' t p ieileprl e ees et i; en ra fl terminals et eeb a eemonr hereet a id t rms the w re e esel y ab. A.

he ebieet pe the. uvet t en t u gene all ee rth together with other objects and Qmiliaryadyant-ages are attained by the construction and; arra m t, shown y way of illustration .in the accompanying drawings, in which: h

Figure tie a central longitudinal section through a wire Wrapping tool embodying the present invention.

Fig. 2 is'a transyerse sectieig taken substantially in the piano of line -2 -2 in'Fi g. 1,

ea the erwe isi en of. the easiee 1. Ihe. s i 1 1s dri en y t e tq re "eh. med um at it dri e. me han sm. e' tdme, e e u b. requ s e en ally t .1 ?he. elmsh eetndl s. a eri iea lemeti 15 ea e s i eu em at' e latter the resent n te e eing, t rm d in sr'e 'w th spi dle The s l i journ'al ed lwitljin a barrel 17 and 1s driying ly connected we f r rde d we eenee w a p ng me e 18 journal ed within a'sleeve 19 which 'fixed within the erw' d en i the ba l 117 i In the illustrative tool-the motor 11 is of; the type adapt ed me en by Pres u fl d su h as e n r s andincludes a vanedrotor 29 'mounted-within-an eccenl y d sp se ham e 1 defi e y g e a y ey na u in havin i s; ends 'e by s bl n plates 23 and 24;, Therotor 29 is carried by a hollow shaft 25 which journ a led atjts opposite ends in bearings wh h. a e t i ed y t ddplat s- Pressure fluid: in this iiistancg compressed air is supplied to the toothy way of a fitting disposed at the lower t t a han le. fi a nsa a ed passage e Wh eh omtn m eates i h. the me er; ehambe by ay o 2 e 'per 0 in the rear nd Pl te :2 As l n the handle is' formed integral with "the rnain casing 10 and is equipped with a suitable trigger 31 for operating the valve (not shown) controlling the supply of pressure fluid through the passage 29. jSpent pressure fluid is e haysted from the inotorcharnber'by way of exhaust ports 2 n t h H EB 12 a en xhau t ee s 33h! e esin casing 1 0. M

' 1 ut s to the e h th iviae a teen; iatween the motor 11 and the spindle 12 includes planetary speed reduction gearing interposed between the upper t it clutch block and the motor 11. Thus, the motor shaft has rigid with its forward end a driving or sun gear'34 which meshes with planetary gear elements 35 rotatable within a stationary ring gear 36. The planetary gear elements are supported on pins 3.8..which are'carried by a disklike spider 39. The spider 29 is journaled in an antifriction bearing 40. Interposed between the driving clutch element and the spider 39 is a splined stub shaft 41 which is rigid with the spider and affords a driving connection for the driving clutch element 15, constraining the same to axial movement with respect thereto.

The clutch is normally disengaged, and. for this purpose an expansion type spring 42. is interposed between the driving clutch element 15 and the driven clutch element 16. As shown, the spring is supported on the forward end of the stub shaft 41 and bears at its rear end against an internalshoulder 15a in the driving .clutch element and the inner face of an external shoulder 41a on the stub shaft.

The clutch is arranged to be engaged as an incident to the application of powerto the tool. This is accomplished in the illustrative tool .by the application of pressure fluid to the rear face of the driving clutch member 15 so as to move the same forwardly on thestub shaft 41 and into engagement with the driven clutchelement 16. For this purpose pressure fluid is suppliedto a chamber 44 defined in part by the rear'face of the driving clutch elementlS and in part by a clutch housing sleeve 45 which, as shown, is screw-threaded into the forward end of the main casing 10. Pressure fluid from the motor chamber 21 is supplied to the clutch chamber 44 by way of a bleeder port 46 in the forward end plate 23 of the motor assembly. The bleeder port 46 is located in angular relation to the supply port and the exhaust ports 33 in such a manner that it is intermediate the same, thus insuring the presence of at least one of the rotor vanes 2011 between it and both of these ports (Fig. 3). municates with the space between the planetary gear elements, and pressure fluid. supplied therethrough tosuch space finds its way through-the interstices between the antifriction elements of the bearing 40 to the clutch chamber 44.

At its forward end the bleeder port 46 com- Upon application of pressure fluid" to operate the tool,

motor rotation is initiated, and a part of thepartially spent fluid from the motor chamber 21 -is supplied behind the driving clutch element 15 to move it forwardly against the action of the spring .42 into engagement with the driven clutch element 16. To; prevent entrapment of air ahead of the pistonlike driving clutch element, which would hinder engagement of the clutch, the clutch housing is vented to the atmosphere by means of a port- 48. It will beapparent thatupon interruption of the g supply of pressure fluid to the tool, when the trigger 31 'i5 released, pressure fluid supply tothe clutch chamber: 44 is interrupted, and the clutch spring42 becomes efiective to re'tract'the driving clutch element 15 the clutch chamber being vented by way of theinterstices between the antifriction elements of the bearing 40, the space between the planetary gear elements 35 and withihthe ring gear 36, the bleeder port 46, themotorexhaust port 32 and the casing exhaust passage 33.

It will be appreciated that when a conductor is wrapped about a terminal considerable torsional force is applied thereto in wrapping the conductor tightly enough so that it will grip the terminal. 'An important feature of the present invention lies in the provision of means to prevent the terminal from being twisted as the conductor is wrapped about it. In the first form of the invention illustrated, this means includes a stationary terminal receiving member 54 which is of thick-walled tubular form diametrically slotted adjacent its forward end to define the terminal receiving recess 52. The terminal receiving member, as shown, extends in coaxial relation entirely through the tool, its tip portion and its power unit, and is held in fixed relation thereto by means of a set screw 55 disposed adjacent the rear end of the main casing 10.

Upon reference to Figs. 1, 5 and 6, it will be seen that by cross-slotting the forward end of the terminal receiving member, the recess 52 is provided with flat parallel side walls which when a terminal is inserted therein are adapted to engage the opposite sides thereof. Thus the member 54 effectually prevents the terminal from being twisted as a conductor is wrapped about it.

To retain the terminal within the recess 52 and to retain the conductor within the slot 50 in the wire wrapping member 18, a sleeve 56 is provided on the outer end of the terminal holding member 54. This sleeve may be press-fitted or otherwise rigidly secured to the end of the member 54.

The operation of the illustrative tool will be apparent from the foregoing. However, it may be briefiy summarized as follows. When it is desired to wrap the end of a conductor about a terminal post, the operator first inserts the end of the conductor into the recess 50 in the wire wrapping member. Then, holding the conductor in one hand and the tool in the other, the operator places the tool-over the terminal so that it is disposed within the recess 52. Upon operating the trigger 31 to admit pressure fluid to the tool, rotation of the motor 11 is initiated and pressure fluid'from the motor chamber 21 is supplied to the clutch chamber 44 and the driving clutch element 15. ismoved into engagement with the driven clutch element 16. Thereuponthe spindle 12 and with it the wire wrapping member 18 are rapidly rotated and the conductor is wrapped about the terminal post, the conductor being withdrawn from the notch as it is wrapped. It will be apparent that the amount of conductor that is wrapped about the terminal post is-determined by how much of the conductor is inserted in the conductor receiving recess 50 in the wire wrapping member 18.

It will be appreciated that in wrapping the conductor about the terminal post by means of the present tool the helical coil form assumed by the conductor is partly the result of the winding operation 'and partly the result of actual deformation of the metal constituting the wire as it is. withdrawn over the edge of the wire receiving recess 50 during the windingoperation. It has been determined that by controlling the shape of the edge of the notch over which the wire is withdrawn during the winding operation,

Turning now to the wrapping it has hereinbefore 1 been noted that rigid with the spindle 12 and rotatable within the sleeve 19 is thewire wrapping member 18. This member is of tubular form and has provided therein a longitudinal slot 50 which, with the adjacent portion of the sleeve 19, defines a recess for the reception of the end of a conductor which is to be wrapped about a terminal post. To receive the terminal post in a manner whereby a conductor can be wrapped thereabout, the wrap to start in spaced relation to the end of the terminal, the forwardend of the tip portion of the tool is prothe degree of tightness with which the wire is wrapped about the terminal post can be controlled. More particularly, if the edge 58 of the notch (Fig. 4) is of rounded configuration having a relatively large radius of curvature, the wrapping of the wire about the terminal post will not be as tight as it would be if the corner were made relatively sharper since a rounded corner would produce less stretching of the side of the wire not in contact therewith as compared to that which would result upon withdrawing the wire over a sharper corner.

In many applications where conductors are applied to terminal posts, it is desirable that more than one conductor be applied to a single terminal post. It is usually desirableunder these circumstancesgthat the conductors be attached at points axially spaced along theterminal post To this end, means is provided for varying the extent to which the terminal post can .be inserted into the ss' ll m s ret i ns, em r den he present instance this means inchides a rod: 60 which extends axially through the tubular terminal receiving member 54 and which has its forwardend adapted to be adjustablyprojected into the terminal receiving recess 52 from the rear end thereof-for engagement by the outer end of a terminal upon insertion the terminal in the recess. Means is provided for axially adjnsting the position of the limit rod 60 from a fully retracted posit-ion wherein its forward end is withdrawn so. as notto project into the recess 52, through an intermediate position wherein its forward end assumes a position medially of the recess, to a position in the forward end of the recess. In the present instance this means comprises an adjusting screw 62 equipped at its outerend with a finger piece 63 which is secured to the rear end of the limit rod 60. The adjusting screw has a shank portion which projects into a coaxially disposed sleeve 64 fixed in the rear end ofthe main casing 10. In the outer surface of the shank portion of the adjusting screw there is provided a helical groove 65 adapted for cooperation with a ball detent- 66 carried by the fixed sleeve 64. ,A split annular spring 67 mounted on the outer end of the sleeve and engageable with the ball detent servesto maintain the ball detent in the helical groove of the adjusting screw. Manual rotation of the screw 62 by means oi the finger piece 63 results in an axialshifting ofthe screw whichfbeing rigid with the limit rod 60, serves to shift the limit rod axially within the terminal receiving member 54 and Qthe forward end thereof within the terminal receiving recess 52'. Preferably a plurality of detent receiving recesses 65g are provided, in spaced relation along the'helical groove 65' which serve to denote a plurality of predetermined positions for the limit rod so that the extent to which the terminal post is to he received in the recess 52 of the terrninal receiving member 54 can bepaadily adjusted to permit successive wrapping operations onto a terminal post at predetermined spaced positions therealong.

As hereinbe'fore set forth, preparatory to performing the wire wrapping operation, theoperator using the tool inserts one end of "the wire in to the longitudinal wire receiving recess 50 provided in the forward end of the wire wrapping member -18. Thereafter the tool with the conductor received in the recess is placed over the terminal so that the conductor can 'be'wrapped there about. However, the tool can be placed over the ter minal prior to the insertion of the wire therein, as is frequently found to be desirable in assembly line operations on electric relays and electronic devices where the opposite end of the conductor has previously been secured to another terminal post. In'either instance it is necessary for the operator to first locate the recess into which the conductor is to be inserted and thereafter ,to make the insertion. It will -be appagent, therefore, that it is particularly desirable forl'efiicient manipulation of the tool and to enhance work production therewith, especially over an extended period of use, that the: wire receiving recess be normally positionedin definite angular relationship to the axis of the tool, For example, if the operator who is to use the tool is right handed, so that he normally holds the tool in his right hand; itprobably will be morefconvenipnt for to have the conductor receiving recess nor na y-disposed to the right of the tool axis when viewed-from theforward end thereof (as seen in (Fig; 6) so that with his left hand he can conveniently insert theconductor end into the recess without having to reach around the tip portion of the tool to do so. To this end, means is provided for automatically repositioning the Wire wrapping element to a predetermined angular position with respect to the tool axis after each winding operation has been completed.

In the illustrative tool and forming apart of the aforesaid means, the spindle 12 has associated therewith means which permits the spindle to be: rotated within the barrel 19 when turning more. direction, as upon its being driven by the power unit oi the tool, but which, when the spindle is" turned in the opposite direction, is eifective to stop rotation of the spindle in such direction at a particular angular position of the spindle with respect to the remainder of the tool. It'will be apparent, of course, that control of the angular position of the spindle will also result in the control of 'the angular position of the conductor wrapping member 18 since these elements are secured together.

As shown, the spindle is provided with a drop-oil notch or shoulder 73 in the periphery thereof for cooperation with a pawl 72. The latter is disposed in a transverse slot 7-3 formed in the barrel 19. and is pivoted therein for movement into and. out of engagement with the dI'OPrOfi notch 70 on a pivot pin '74. The pawl is normally biased toward engagement with the notch by means of an expansion type spring 75 which is received within a suitable recess 76 provided therefor in the barrel 19. It will be apparent, therefore, that, as viewed in Fig. 2, the spindle can be freely rotated in a counterclockwise direction but is limited in clockwise rotation by engagement of the shoulder or drop-off notch 70 with the pawl 72.

The repositioning means for the spindle and conductor wrapping member also includes a mechanism for imparting reverse rotation to the spindle upon completion of a winding operation so as to return the spindle 12 and wire wrapping member 18 to their initial positions as determined by the engagement of the shoulder 70 with the pawl 72 and thus reposition the conductor receiving recess 50 in the wire wrapping 'mernber at the desired angular position with respect to the tool axis. In the present instance, this mechanism includes a torsional coil spring 78 which is disposed about the spindle 12 and within the barrel 17. The spring 78 has one end thereof anchored to the spindle as at 79. and it is arranged to be conditioned during the driving operation to enable it to impart the desired reverse rotation to, the spindle upon comp ion of a w ndi pe at on Fo h s purpo e, a P t n of the sprin is a ranged to frictional y n a e th n r wall of the ba rel 1. and he spring is so me h it tends be nwound du g th d i n o th spindle by the power unit 9f the tool by yirtue of such frictional engagemen Morep rt cula y, w n t ut h 14 is e g d nd t dr es. elemen .16 an h p dle are r tated in a co n e clock "se d re t o a v e e in Fig. 2 .80 as to periorrn a winding operation, the spindle 12 and with it t conducto di me b r 8 a b free y a d. Duri uch at n, be ause of the fricional drag of he. en a ed port on o t i sp in 8 on the. b rre .7 i its r ati n w th th p dl the c p in 78. tends o e. unwound, The i subst ia sl pp ss betwe n the sprin and t e ba re 03 h sp in is. n t dam ed s o n as e lu ch s, released, uneni ter upti n f the s ppl of pr sur fl d to the tool, the spring 78 tends to return to its normal condition. n so do n i applie a re erse rotat n o th S l 12 an conscnu l to h c ndu tor d n m b r unti uch t me a he n t h 79 is Pos ion d o ceive h spr n ia ed. p l. n h ch P s tion e du t receiving re ess 50 i th conduc W nd n memb 18 ass m s, i ia Pot n, h ri h de o t e ool a se n F 6 who it -asait e y cce b for a uccee in conductor ins o Sln e he i ly ic nal en emen b t e n the return s in 78 n the barrel 17, any further energy stored in the spring is s mply d ss a ed by ip g b w en these two elements- The Pr se t co struction n a an m nt i uc that the tie parties Qt he insta t to c n e r adi h n t r exam le, o ac mm date str am si e clucts s or; terminal p. t an al o it tasilitat s adju t ment of the angular initial position of the wire receiving recess with respect to. the tool axis according to the convenience of the operator using the tool, without neces:

sity for altering or adjusting the driving means therefor. It will be seen from Fig. 1 that the tip portion of the tool, including the barrel 17 and sleeve 19 with the spindle 12 and conductor wrapping member 18 journaled therein, can be readily removed from the tool simply by loosening a single retaining collar 80 by means of which the barrel is attached to the clutch housing 45 when the collar is loosened. The aforesaid components can then be separated by axial movement from the power unit. To release the terminal receiving member-54 it is only necessary to loosen the set screw 55 disposed adjacent the rear end of the main casing 10 and it, too, can be withdrawn by forward axial movement.

It will be noted that in eifect the tip portion of the tool is comprised of two main separable parts, namely, the conductor receiving member 18 with the means for rotating it, and the stationary terminal receiving member. From the foregoing it will be noted that the angular positions of either or both of them can readily be changed with respect to the tool axis and thus with respect.to

each other; the former by simply loosening the set screw 55, and the latter by simply loosening the retainingcollar 8t) whereupon the necessary angular adjustment can be readily efiected.

Turning now to the form of the tool'illustrated in Figs. 7 and 8, there shown is a modified formof' tip portion for the instant tool intended primarily for the application of a conductor to a round terminal post or to a terminal post where it is not necessary to hold the same against being twisted as the conductor is wrapped about it. Thus this form of wire wrapping tip is of substantially simplified form as compared to that previously described. It includes a wire wrapping member 18A which is adapted to be rigidly secured in coaxial relation to the spindle 12. This wire wrapping member has a central bore therethrough which at its outer end defines the terminal receiving recess 52A. To receive the conductor this wire wrapping member is provided with a longitudinal notch 50A in its side wall. This notch, together with a stationaryouter sleeve 19A, within which the member is journaled, defines the conductor receiving recess. Like the first form of the invention hereinbefore described, a terminal insertion limit rod 60A can be employed with this form of wrapping tip. This limit rod 60A is adapted to extend coaxially through the tool and can be made axially adjustable within the bore 52A.'-'

In Figs. 10 to 12, inclusive, there is illustrated yet another form of tip portion for'the wire wrapping tool. This form, like the first form of the invention illustrated,

is adapted to receive and'hold a terminal against detip portion defining" a terminal receiving recess" 52B shaped to engage the Sideso'f'a terminal"insertedtherein to hold it against twisting.

This wrapper tip also includes a wire'wrapping member 18B which is adaptedto be rotated by suitable connection with the spindle 12 and within a stationary outer sleeve 19B. The sleeve 19B is adapted to be rigidly secured within the forward end of the barrel 17.

In this form of the invention the wrapper" tip is not only adapted to'receive the 'end of a conductor, but is constructed so as to lay the 'same closely about a flat terminal received in the recess 523 as it is rotated. For this purpose the conductor wrapping member is equipped with a resilient, fingerlike follower 90 which is disposed in a longitudinal slot 91 in the side wall'of the wire wrapping member 18B. The follower is rigidly"'secured at its rear-"end in the rear end of the slot'inth'wi're wrapping member and is of tubular form havingan' outer open 'end' to" define a"conductorreeeiving" recess 5013. The forward end of the follower extends" into the interior of the 'conductorfwra'pping member 18B so-that at its forward end it bears against the forward end of the terminalreceiving member 54B. Because of its resiliency, as the wire wrapping member is rotated about the terminal receiving member, the forward end of the follower, bearing against the forward end of the terminal receiving member, is moved in and out of the slot 91, as it follows the flattened contour of the terminal receiving member 54B. Thus, as a conductor received therein is withdrawn upon winding it about a terminal inserted in the terminal receiving member, the conductor is laid closely about the terminal.

As with the form of wire wrapping tip illustrated and described forthe'first of the illustrative forms of the invention, tension control in the conductor can be effected by appropriately curving the outer end of the conductor receiving recess.

From the foregoing, it will be apparent that a wire wrapping tool constructed in accordance with the present invention is capable of quickly and efiiciently applying a conductor to a terminal post to the end that one or more turns of the conductor are wrapped tightly thereabout so as to intimately engage the same. Even though comparatively large torsional stresses are applied to the terminal post during the wrapping of the conductor about it,-the terminal post is eflectively held against twisting. Furthermore, an operator using the tool can control the axial position at which theconductor is applied to the terminal post.- Also the present construction and arrangement facilitates alteration of the "at restposition of the conductorreceiving recess according to his convenience and by the same token tip changes to accommodate different applications can readily be efiected.

I claim as my invention: 1

l. in a power operated tool for applying a conducting wire to a terminaL-the combination of a hollow spindle, drive means for-rotatingsaid spindle in one direction, a normally disengaged driving connection interposed between said drive means and said spindle engaged in response to application of power-to the tool to actuate said drive means, a wire wrapping member rigid with said spindle forrotation therewith, said wire wrapping member being adapted to bev telescoped over the terminal and having a forwardly open recess therein eccentrically disposed with respect to its rotational axis for receiving the wire, means effective upondisengagement of said connection in response to interruption of power supply to saiddrive means for.reversely rotating said spindle, and stop means operative upon reverse rotation of said spindle to define a particular angular reset position of said spindle, wire wrapping member and its wire receiving recess with respect to the tool axis.

2. In a tool for applying a conducting wire to a terminal, the.combination of a spindle, drive means for said spindle, a wire wrapping member rigid with said spindle for rotation therewith, said Wire wrapping member having a forwardly .opening recess therein eccentrically disposed with respect to its rotational axis for receiving the wire, a stationary terminal holding member having a coaxially disposed and forwardly opening recess therein for receiving-andholding the terminal against twisting as said wire wrapping member is rotated upon rotation of said spindle and the wire .is wrapped about the terminal, stop means engageablewith said spindle and defininga normal angular position thereof with respect to the tool axis, and means operatively connected to said spindle and conditioned during the operation of said drive means for reversely rotating said spindle for engagement by said stop means whereby said spindle is reset for a subsequent wire wrapping operation.

3. In a tool for applying a conducting wire to a terminal, the. cornbiuation ofla stationary barrel a hollow spindle journaled within said barrel, drive means for rotating said spindle in one direction, a wire wrapping member-rigid withsaid spindle for rotation therewith, said wire-"wrapping memberbeing adapted to be-telescoped over the terminal and having a forwardly open recess therein eccentrically disposed with respect to its rotational axis for receiving the wire, a pawl mounted on said barrel for movement transaxially of said" spindle, said spindle having a shoulder thereon for cooperation with said pawl, and means for reversely rotating said spindle upon completion of a wire wrapping operation, said pawl being engageable with said spindle shoulder during reverse rotation only of said spindle so as' ft'o determine a particular angular reset position of said} spindle, wire wrapping member and its wire receiving recess with respect to the tool axis.

4. In a tool for applying a conducting wire to a terminal, the combination of a stationary barrel, a hollow spindle journaled within said barrel, drive means for rotating said spindle in one direction, a wire wrapping member rigid with said spindle for rotation therewith, said wire wrapping member being adapted to be telescoped over the terminal and having a forwardly open recess therein eccentrically disposed with respect to itsrotational axis for receiving the wire, a pawl mounted on said barrel for movement transaxially of said spindle, said spindle having a shoulder thereon for cooperation with said pawl, and means including a torsional spring interposed between said barrel and said spindle conditioned during the operation of said drive means for reversely rotating said spindle upon completion of a wire wrapping operation, said pawl being engageable with said spindle shoulder during reverse rotation only of said spindle so as to determine a particular angular reset position of said spindle, wire wrapping member and its wire receiving recess with respect to the tool axis. U

5. In a tool for applying a conducting wire to a terminal, the combination of a stationary barrel, a hollow spindle journaled within said barrel, drive means for rotating said spindle in one direction, a wire wrapping member rigid with said spindle for rotation therewith, said wire wrapping member being adapted to be telescoped over the terminal and having a forwardly open recess therein eccentrically disposed with respect toits rotational axis for receiving the wire, a torsional spring frictionally engaging said barrel and having one of its ends secured to said spindle, said spring being tensioned during the oper ation of said drive means and operative upon completion of a wire wrapping operation to reversely. rotate said spindle, and stop means effective upon reverse rotation of said spindle to determine a particular angular reset position of said spindle, wire wrapping member and its wire receiving recess with respect to the tool axis.

6. In a tool for applying a conducting wire to a flat terminal post, the combination of a rotatable wire wrapping sleeve having a longitudinal slot in one side thereof, a resilient follower fixed at one end to said sleeve and having a free end extending into said slot;'said follower having a forwardly opening recess thereinfor receiving the wire, and a stationary tubular terminal holding member in said sleeve having a flattened forward end portion defining a coaxially disposed and forwardly opening recess for receiving the terminal, the free end of said follower bein'g-biased toward said member adjacent the forward end thereof and movable in and out of said slot upon its rotation with said sleeve to follow the contour of said member, said terminal receiving recess having flat side walls adapted to engage corresponding sides of the terminal to hold the terminal against twisting as said wire wrapping sleeve is rotated and the wire is wrapped about the terminal, said follower laying the wire closely against the terminal during the wrapping operation.

7. In a-tool for connecting a wire to a terminal, the combination comprising a casing having a forward tubular extension, a tubular member rotatable in said extension and having a passage disposed eccentrically thereof and opening forwardly for the reception of a wire, a terminal holding member extending axially through said member and secured to said casing, said terminal holding member defining a coaxially disposed and flat-sided terminal-receiving recess in its forward end, said terminal holding member further having an axial bore therethrough opening into said recess, a stop rod disposed in said bore and having its forward end extending into said recess for engagement with the outer end of a terminal received therein, a fingerpiece rigid with the other end of said stop rod, and means fixed with respect to said terminal holding member and engageable with said fingerpiece for axially adjusting the position thereof and of said rod within said bore whereby to limit the extent of insertion of said terminal in said recess to determine the axial position of the wire connection along the terminal.

References Cited in the file of this patent UNITED STATES PATENTS 789,941 Sibley May 16, 1905 1,634,801 Schneider July 5, 1927 2,199,113 Pierce Apr. 30, 1940 2,375,861 Martin et al May 15, 1945 2,585,010 Hickman et al Feb. 12, 1952 2,635,819 Bennett Apr. 21, 1953 2,648,356 Beaulien et al Aug. 11, 1953 2,649,121 Reck Aug. 18, 1953

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