US1793487A - Apparatus for making electric cables - Google Patents

Description

Feb. 24, 1931.

G. A. JOHNSON APPARATUS FOR MAKING ELECTRIC CABLES Filed. March 22. 1.929 3 Sheets-Sheet l I N VEN TOR.

Feb. 24, 1931. G. A. JOHNSON 1,793,487

fAPPARATUS FOR MAKING ELECTRIC CABLES F'iled. March 22. 1929 3 Sheets-Shee't 2 I JNVENTOR. GZ/STHI/E fl JOHNSON Feb. 24, 1931. G, A, JOHNSQN 1,793,487

APPARATUS FOR MAKING ELECTRIC CABLES Filed. March 422. 1929 3 Smeets-Sheet 3 I j '55 l 80 Jl y Y Y @46' INVENTOR. "C, awr/:IVE H. JOHNSON ATTORNEY.

Patented4 Fel.- 24, 19.131 i 'UNI-TED STATES PATENT OFFICE ausm-Avisa JoHNsoN, .orIBvnreT/ON,

Arranamus :Fon MAKING minerale cABLEs appncatibn mea maren 22, 192s. serial No. 349,078.

This invention relates, generally, to a i 10 cable.' One apparatus has been used to put a desired twist on the insulated conducting strands or wires. Another independent apparatus has been employed Vto braid thetwisted wires with an insulating tape -or tapes and still another apparatus has been used to i apply as uitable water-prooiing agent to the l twisted and wrapped wires. A fourth apparatus is then employed toput the armored or flexible metallic casing over the twisted,

wrapped, and water proofed wires. The use.

of such a plurality of apparatuses not only requires a relatively highvinitial equipment investment but also results in hlgh operating the. material worked upon from one apparatus toA another during the manufacturing process.`

vention to/provide a novel method and apparatus for producing armored. electric cables, Awhich consists employing but a wrapping, Awaterpregning`A and 'armoring av plurality ofinsulated-electrical conductors. Another o ject ofthe, present invention liesA -Y in the provision ofrv means forautomatically stoppingV the functioningof thenovelfapparatus or machineef this 'invention lin the event -that the, tapes of mjaierial supplied@ vt0 vthe fail to feed a'sfvdesired.. i

. .sen .anota objea' ef nvm' which ispositiveand reliable in operation.

' Other objects of this invention,not atV this ducing the armored cable'.v

costs owing to the necessity for transferring' n is the pfincipaiobjea ef the present fin- Y and isirotatablysupported in pedestals 3 and 4 mounted en the supporting. lioor 20. The

driven sprocket 9 is v A n is to provide a novel apparatusef-the above char' acter which 'is of simple lconstruction -and illriven sprocket- 17 is somewhat smaller The invention is clearly illustrated in the accompanying drawings, in which Fig.v 1 is a view in front elevation of the novel .armoredcable making machine of this invention and illustrates themethod of pro- Fig. 2 isl a plan view of the structure shown in Fig. vl;

Fig. 3 is a sectional viewtaken along line 3-3ofFig.2; Y .760

Fig. 4 is a perspective view of the cable' die employed in producing the cable armor;

Fig. 5 is an enlarged sectionalview taken along line 5-'5 of Fig. 2; l

Fig. 6is a fragmentary sectional view taken 65 along line 6-.6 of Fig. 3; and

Fig; 7 is an enlarged lfragmentary sectional j -view taken along line 7-7 of Fig. 3.

' Similar charactersv of reference are em ployedl in all ofthe hereinabove described.

views, toindicate corresponding parts. Referrmg now to the several figures of the "drawings, the reference numeral 1 designates amachine frame or table which serves-as `a support for the novel armored cable making apparatus or machine of this invention. Ac-

cording to the preferred arrangement, a

power shaft2extends under the top of table 1 power shaft 2 carries'a iixed pulley 5 anda a power belt 7. A driving sprocket 8 is keyed tothe shaft 2 and is adapted to drive a driven 85 sprocket 9 through a s rocket'chain 10. The Xed upon a rotatable l. hollow shaft that' extends through'a bear ing pedestal 12 and has a reel carrier 13 fixed Same shuld. accidentuybmak mi. therwiS-e.. to lts outer -end.- The reel carr1er 13 carries 90 a bolt 1.5.`

A second driving sprocket 16 is also-keyed to the shaft 2and is adapted. to drive a driven ssprocket 17 through a sprocket vchain 18.

procket vwheel 17 is keyed l'upon' a hollow shaft 19 that has its'inner end rotatably supported in fabe'aring pedestal l21 and its outer end likewise supported a bearing pedestall than driven sprocket 9, so that with driving sprockets 8 and 16 of the same size, shaft 19 rotates at a higher speed than shaft 11. For example, these sprockets may be designed so that during a period while shaft 19 makes 48 revolutions, shaft 11 will make only 45% revolutions. This difference in speed of shafts 19 and 11 produces the desired twist in the cable conductors as will later appear. The shaft 19 extends outwardly of pedestal 22 and has the hub 23 of a winding drum 24 keyed on the outer end portion of the shaft 19. Winding drum 24 is of substantially cylindrical shape and has an open outer end which is adapted to be closed by a cover plate 25. Cover plate 25 is removable from the drum 24 and is attached to this drum when desired by means of slide bolts 26. These slide bolts are adapted to be inserted into socket plates 27 that are lixed to the outer periphery of the drum 24. The slide bolts '26 have a bayonet connection 28 with their bolt casings 29 so that when these bolts are inserted into the socket plates 27,the

bayonet connections serve to lock these bolts in such position and thereby prevent accidental removal or displacement of the cover plate 25 from the drum 24. Centrally positioned upon the cover plate 25 and adapted to project into the drum 24, is a boss or projection 30 having a round shield plate 32 carried on its free end. Vith the cover plate 25 mounted upon the drum 24, the shield plate 32 extends centrally within the drum 24 for the purpose of deiecting the armored cable outwardly toward the inner periphery of the drum in a manner to be further described.

A sprocket 33 is fixed upon the inner end of the shaft 19 and is positioned adjacent the bearing pedestal 21. Sprocket 33 is adapted to drive a sprocket 34 by means of a. transmission chain 36. The sprocket 34 is keyed upon a stub shaft 35 that is rotatably supported by bearing pedestals 37 and 38. The stub shaft 35 has keyed thereupon a pinion 40 which meshes with and is adapted to drive a beveled gear 41. The beveled gear 41 is keyed upon the end of a shaft 42 that is rotatably mounted in bearing supports 43 and 44. The shaft 42 carries a flanged forming roller 45 that is positioned between the bearing supports 43 and 44. AA gear 46 is keyed to that end of shaft 42 that is adjacent the bearing support 44. Gear 46 meshes with a similar gear 47 that is mounted on a shaft 39 (see Fig. 6) extending parallel to and positioned below the shaft 42. This latter shaft carries a forming roller 50 that is adapted to cooperate with the forming yroller 45 to form suitable longitudinally extending concavo-convex grooves in a metallic tape or cover strip 48 in a manner well known in the art. The periphery of forming roller 50 is adapted to engage the under surface of tape 48 while the forming roller 45 engages the upper surface thereof,

49 during its passage between the forming rollers 45 and 50. The guide block 49 carries a bracket plate 51 at its outer end. The bracket plate 51 has removably secured thereto, as by bolts 54, the two halves 52 and 53 of an armor-die (see especially Figs. 4, 5

and 6). This armor-die has a lead in clearance opening-3l and a central aperture 55 provided with an internal helical thread 56 of suitable shape for conforming to the metallic cover strip 48 as deformed by the forming rollers 45 and 50. The armor-die is adapted, through the medium of its helical thread 56, to form the metallic cover strip 48 as it 1s fed from the forming rollers into a flexible metallic cover 69 for the cable produced by the machine. The bracket plate 51 has an aperture 57 in alignment with the aperture 55 of the arlnor-die.

The metallic tape or cover strip 48 is supplied to the armored cable making machine from a suitable spool or reel (not shown). The metallic cover strip thus fed from this reel is adapted to pass under a guide roller 58 that is partially immersed in a suitable lubricant 59 contained within a vessel 60. From the roller 58, the metallic cover strip 48 passes upwardly and over a guide roller 61 that 1S rotatably mounted upon a shaft 62 carried by a pedestal 63. From the guide roller 61, the cover strip 48 extends into the guide block 49, passing between the forming rollers 45 and 50 and is gripped by these rollers, and thence moves to the armor-die. The forming rolle;` 45 has a portion of its periphery serrated, knurled or otherwise roughened as shown in Fig. 2 for the purpose of increasing its frictional grip on the cover strip 48 so that this roller may readily drive the cover strip through the armor-die.

The cover strip guide roller 58 is rotatably mounted upon a pin 64 that is carried by an arm 65 of a bell crank lever 66. Bell crank lever 66 is fixed upon a supperting shaft 68 that is rotatably carried by the frame l, the other arm 67 of bell crank lever 66 having an offset portion 70 overlying the forward end of a trip lever 71. A desired tension is mainllo tained in the cover strip 48 by the action of a tension spring 79 that has one end connected to a lever 109 which is fixed upon shaft 68 and its other end attached to machine frame 1. Spring 79 acting through lever 109, shaft 68, arm 65 and roller 58 causes this roller to tension cover strip 48.

The trip lever 71 is pivoted upon a pin 72 carried by a pedestal 73. Trip lever 71 extends through a rectangular aperture 75 in a trip-cam 74 (see Fig. 7). Trip-cam 74 is of substantially rectangular shape and has a bearing aperture provided near one of its ends. A pivotal pin 76 extends through this bearing aperture and this pin has its ends supported in brackets 77 and 78. The brackets 77 and 78 are mounted upon and secured plate 89 extends through longitudinal guides 81 and 82 fastened to the supporting floor 20. Belt shifter plate 80 has an upstandln flange 84 carrying shifter rollers 85 and 86 t at are positionedadj acent opposite edges of one run of the transmission belt 7. A tension spring 87 has one end secured to the upstanding flange 84 and its other end secured to the machine frame 1. 'The tension spring 87 tends to shift the belt shifterA plate longitudinally through the guides 81 and 82,'and by urging roller 85 against the edge of belt 7, move this belt onto the loose pulley-6, thereby f cutting olf the supply of power tothe cable gmmaking machine and effectin i the stopping of thesame'. This action of t e spring 87 is normally prevented, however,by the action of the trip-cam 74. During the'normal running of the machine (as illustrated in Fi s. 1 and 2), -vtrip-camA 74 abuts the longitudinal guide 81 and preventsspring 87 from'moyin'g the belt shifterfplate 80 so as to stopy the machine. 1 p f An eye-member 88 lis secured to the belt 3u shifter plate -adjaclent the upstanding flange 84and an operating link 90 has its lower end bent "into a hook'which extends through the aperture in the eye-member88.. v,The upper end of operating link 90 is pivejtaly colkncted .a e cra ever to a depending arm 91o that ispivoted .upon .a transversely extendmg shaft 92 supported at its endsin brackets '93.

'carried bythe machine frame 1. Theother arm-y of this bell cranklever is pivotally, connected to the lower end of a vertically extending link 95. The upper end of this verhollow shaft l and thence through a sup-v porting guide-member 105 mounted upon the top of the machine frame 1. From the supporting 'de-member 105 these Ywires extend to and t rough the: central apertures 57 and within the bracketl plate 51 and armor-dm respectively.

A brous tape 106 made of suitable insulating material such as paper, is adapted -to'be spirally. 'wrapped upon the wires v102 and 103. This tape -is unwound from a suitable drum (not shown)-l andv passes down and under 'a guide rollerv107 rotatably carried to a belt shifter plate 80. The belt shifter' by a plate 108. Fromthe guide roller 107,

the tcape 106 extends up and over a smaller guide roller 110 also rotatably carried by the plate 108. From the roller 110 this tape extends over an adhesive or mucilage applying guide roller 111. The roller 111 is rotatably carried by a platev 112 that is attached to a mucilage or other adhesive container 113 which in turn is supported upon a bracket 114 that is affixed to the top of the table 1. The lmucilage applying guide roller 111 has its lower portion projecting into liquid mucilage or adhesive substance contained Within" the chiitainer 113 'and the feeding of tape 106 causes roller` 111 to revolve, thereby applying mucilage to the inner surface'of tape 106. From the roller i111, the'tape 106 ex-v tends to andis wrapped spirally around the two wires 102 and 103, eachv successive turn of the tape preferably lying in partially overlapping relation With the next turn thereof.

The plate 108 is mounted upon the outer endV of a lever 115. Lever 115 isrfulrurned intermediate its ends upon a -pin 116 carried by a hanger 117 lthat is secured to the top of the frame or table 1. The inner end of lever 115 carries a weight 118 which acts to counter-balance a part of the weight of the outer portion of lever 115 together with that ofthe plate 108 and its 'de rollers. The portionA of the weight of t ese members whichis not so count'erbalanced serves to vproduce the del sired feeding tension in the tape 106. A lever 119`extends below and transversely of the. y lever 115. Lever 119 is fulcrumed intermedi-l ate its ends upon a pin'120 carried by a hanger 1,21 which is attached to the underside of the table. v One end ofthe lever 119 .carriesa vertically `extending bolt' 122 which projects through an aperture in the top of the tablel A1. .Downward .swlnging movement o f the lever 119 is limited by the head of bolt 122 los striking the'uppel` Surface of the' top of the table 1. The other end oflever`119 has a depending` link 123 pivoted thereto by a pin .124. The lower fend'fof. link 123 is pivotaly connected by a pin 125. to the rear end of trip-lever. 7l. i

v A container 127ii1led with water proofing material, such as parain, is supported in overlying relation tothe wires 102 and 103 by abracket '128 thatisgtnounted upon the top'of table/1.11 A friction roller 129 is rotatably carried "by, a pedestal 130 that is attached to the bracket v128. Frictionl roller,l

129 has rubbing contact with the outer surface of the paper tape 106 that is spirally wrapped upon thetwo insulated wires 102 is adapted to convey such water-proofing ma; teria'lor liquid supplied byV the teat 131 to the outer surfacelof the spirally wound tape '106 covering the wires v102 .and-103.

and 103. The'container 127 is rovided-with v,a depending teat-131thatis a apted to supply Water'fproofing material to the peripheral surface of roller. 129. VVThe friction roller 129 than the hollow shaft 11, drum24 will revolve at a higherspeed than reel 13 which is attached toshaft 11. Suchbeing the case, that portion of the wires 102 and 103 that extends into the drum 24 will revolve at a higher speed than that portion of these wires which is just leaving the spool 14. This variation in speed of the wires at opposite ends of the machine results in a desired twisting of the wires, as will be apparent from an inspection of Figs. 1 and 2. The feeding of the wires from the spool 14 to the drum 24 is caused by the action of the armor-die. The helical thread 56 of this armor-die in forming the metallic cover 69 advances the cover 69 together with the enclosedwires 102 and 103 toward the drum 24 or toward the left as viewed in Fig. 1. The pitch of the spiral thread 56 determines the rate at which the cable is advanced toward the winding drum 24. f

The wires 102 and 103 upon leaving the spool 14 and while revolving, pass through the hollow shaft'll. Upon arriving opposite the mucilage applying guide roller 111, these wires are wrapped with the insulating tape 106 and as the width of this insulating tape is normally greater than the pitch of the thread 56 of the larmor-die, this tape will be wrapped upon these wires so that adjacent turns thereof are in overlapped relation.

Since the roller 111 applies mucilage totheinner surface of tape 106 and as the lever 115 together with roller 107 exerts adesired tension upon the tape 106, this tape is pressed firmly against the twisted wires 102 and 103 so that the mucilage is impregnated therein, causing the tape 106 to be securely bound to these wires. With the wires thus wrapped the friction roller 129.. This friction roller contacts with and is -revolved by the rotating tape covered wires so that lthe waterproofing material from the teat 131 passes onto the tape covered wires, thereby forming a coating 134 of water-proofing material, such as paraflin. The taped and waterproofed wires then advances from the friction roller 129 to and through the central apertures in the bracket plate 51 and the armor die wherein the water-proofed-wires are surrounded with the metallic cover 69. From the armor die, the completed armored cable moves on through guide member 133, through hollow shaft 19 and into winding drum 2 4. Within this drum the shield plate 32, acting 1n conjunction with centrifugal force, serves to deiiect the cable outwardly and against the interi-or surface of the drum 24 so that the completed cable as it advances into the drum 24 is Wound sp'irally into a coil therein.

The armored cable making apparatus or machine is adapted to automatically stop running in the event that either the tape 106 or 48 should fail to vfeed properly. Thus, for

example, shouldv tape 106 accidentally break,

the excess weight ofthe rear portion ofthe lever 115 over` that ofthe front portion of this lever, which rear portion carries the plate 108 and guide rollers 107 and 110, will cause the lever to swing downwardly about its pivotal pin 117, thereby causing the weight 118 to move upwardly. As lever 115 swings downwardly it will strike lever 119 and cause this lever to turn aboutits pivotal pin 120. The direction of turning of the lever 119 -as viewed in Fig. l causes the link 123 to move the belt 7 onto the loose` pulley 6, thereby stopping'tlieru-nning of the machine. This same action would' take place in the event -that the tape 106 should become slack for any reason. lSuch slackness isundesirable as it would tend to cause the tape-to be loosely wrapped upon the wires 102 and 103. The metallic cover strip or tape 48 ordinarily does not break but this tape at times tends to become caught upon its reel and does not feed properly, in which eventthe increased tension therein will cause belly crank lever`66 to turn in a clockwise direction, as viewed in Fig.l 3, against the tension of spring 79. As -this lever moves in this clockwise direction,

the offset portion 70 thereof will strike the forward endof trip lever 71, and by turning this lever` about its pivotal pin 72, will also raise the trip-cam 74, thereby effecting the with the tape 106, they are advanced toward stoppage of the'machine..

To again start the machine when the same is not running, it is merely necessary to move either of the handles 100 or 101 upwardly, thereby actuating lever 96, link 95, bell crank levers 91--94, and operating link 90 to move the belt shifter plate towardthe left as viewed in Fig. 1 against the tension of spring 87. This motion of the belt shifter plate causes shifterroller 86 to lmove belt 7 back onto the fixed pulley 5, thereby again starting the machine. During this motion of the belt shifter plate, the trip-cam 74 is gradually sliding off of the longitudinal guide 81, until with the belt 7 Vcompletely upon the fixed pulley 5, this trip-cam drops into locked engagement with guide 81, thereby preventing the llU spring 87 from moving the belt 7 to olf position.

.When the winding drum 24 becomes filled with a coil of the finished armored cable, the machine may be stopped as by manually pulling down lever 115 so as to eect the release of the trip-camV74. The'metallic cover 69 may then be cut at some point between the armor-die and the guide 4133. Upon releasing slide bolts 26 and the removal. of cover kplate 25, the coil of armored cable formed in the winding drum 24 may be removed therefrom, whereupon this cover plate may a ain be replaced and the machine started as be ore.

Itis desired to point out that owingto the simplicity and peculiar construction of the armor-die and the positioning of this die on the side of the bracket plate 51 as viewedin Figs. l and 2, this armor-die readily forms the metallic cover strip 48 into a ex'ible cover `for the cable Without, in any way, injuring the cover strip or its coating of` galvamzmg material,` should it possess such a coating. The lubricant picked upby the cover'strip during its passage through the vessel 60 not only serves to lubricate the cover-strip during its passage through the armor-die, but -al's'o aids in-retaining this cover strip in cool'condition during its passage therethrough. Also, as the armor-die becomes worn in-use, causin an enlargement. of its central aperture, t eabutting edges of the two halves .thereof may be ground down somewhat to againbring the central aperture 55 to desired dimension. f The use of the shield the inner periphery of the windingdrum, resulting in the winding of this cable into a coil therein. Were the shield platenot used,

the armored cable would often become clogged in the 'winding drum 24 and would not be wound up properly, thereby resulting in a possible injury to the armored cable* or tothe cable makmg machine. It will be noted that by properly proportioning the speed of rotation of the winding drum 24 with respect to that of the reel 1 4, a desired number of'twi'sts per foot'may be formed Yin the wires 102 andH 103. It has been foundv in actualpractice, that by revolving the drum v211 at five hundred revolutions per minute and the reel 14 at four hundred and seventy-four -revolutions per minute, the wiresr102 and 103 above construction andA many apparently widely different embodiments of this mvenvrtioncould be madewithout departing from thescope thereof, it is intended that all matter vcontained in' the above description or shown in thevaccompanying drawings shall be interpreted'as illustrative and not in a limiting i pla-.teL 32 causes ithe readyV outward deilecting of the cable toward 1 An larmored cable making machine comprising in combination, supporting means along which a plurality of wires are adapted to be moved longitudinally, means for rotating different portions of said wires at different speeds so as to twist said wires ton gether, means for supplyingV an insulating tape to said rotating wires, said tape being wrapped thereupon in spiral form as said wires rotate', a die membeig'and means for feeding a metallic tape through said die mem- ,ber into surrounding relation with said taped wires.

2. An armored cable making machine comprising in combination', supporting means along which a'plurality of wires are adapted to be moved longitudinally, means for rotat-y ing different portions of said wires at different speeds so as to twist said wires together, means for supplying an, insulating tape to said rotating'wires, said tape being wrapped thereupon inspiral form as said wires rotate, a die member, means for feeding a metallic tape through said die member into` surrounding relation with said taped wires, and means for stopping the operation of said machine vshould said' insulating tape supplying means fail to function. i Y, A

3. An'arlnored cable making machinecomprising Vin` l combination, supporting means along which a plurality of wires are adapted to be moved longitudinally, means :for rotatmetallic tape through said'die member-into 105 surrounding relation withjsaidta'ped wires,

and' means for stopping the operation of said machine should said metallic tape feeding means fail tof function.

4. In an armored cable'making machine, in 110 combination, a supporting table, a rotatable wire reel carried by one portion of said table,

a containermember rotatably carried 5 by another portion of saidV table, the wires from said `reel being adapted to'pass along said 115 ltable 4and into said container, means to rotate said container at a greater speed than said wire reel, thereby efecting the twisting ofV said wires together during their passage to said container, and means for supply` A12o ing an insulating tape with an adhesive innersurface to said wires during their passage to said container, the rotation of saidA wires serving' to spirally wrap said insulating tape in binding relation lupon s aid Wires.

5. In an armored cable 'making'machine in combination, 'a' supporting table,1a rotatable wire reel carried byone portionofsa-id table,

Ia container'member .rotatably carried by anried by said table for applying water-proofing material to said taped wires.

6. An armored cable making machine comprising, a supporting table, a rotatable wire .reel carried by one portion of said table, a

container member rotatably carried by another portion of said table, the wires from said reel-being adapted to pass along said table and into said'container, means to rotate said container at a greater speed than said wire reel, thereby effecting the twisting of said wires together during theirpassage to said container, means for supplying an insulating tape with an adhesive inner surface to said wires during their passageto said container, the rotation of said wires serving to spirally wrap said insulating tape inbind ing relation upon said wires, means carried by said table for applying water-proofing material to said taped wires, a metallic tape feeding mechanism, and .an armor-die associated with said mechanism and arranged in the path of movement of said taped and water-proofed wires, said armor-die acting to spirally wrap metallic tape supplied by said feeding mechanism upon saidwires, the successive turns of said metallic tape being in interlocked relation.

7. In an armored cable making machine, in combination, a table, a wire reel rotatably mounted at one end of said table, aqwinding drum rotatably mounted at the other end of said table, the wires from said reel being adapted to be fed along said table and into said winding drum, means to drive said winding drum at a higher rate of rotation than said wire reel, thereby effecting a twisting together of said wires as theyleave said wire reel, a lever pivoted on said table and carrying a guide roller, an adhesive applying roller, an insulating tape extending around said guide roller and overl Said adhesive applying roller and adapted to be spirally wrapped on said wires as they advance while rotating, and mechanism operated by said lever in the event of breakage orrelaXed tension of said insulating tape for stopping the operation of said machine.

8. In an armored cable making machine, in combination, a table, a wire reel rotatably mounted at one end of said table, a winding drum rotatably mounted at vthe other end of said table, the wires `from said reel being adapted to be fed along Said table and into said winding drum, means to drive said Winding drum at a higher rate of rotation than said wire reel, thereby effecting a twisting together of said wires as they leave said wire reel, a lever pivoted on said table and carrying a guide roller, an adhesive applying roller, an insulating tape extending around said guide roller and over said adhesive a plying roller and adapted to be spiral y wrapped on said wires so they advance while rotating, mechanism operated by said lever in the event of breakage or relaxed tension of said insulating tape forstopping the operation of said machine, and a friction roller carried by said table tocontact said ta ed Wires and adapted to apply waterpro0 ng compound thereto, and means to supply water-proofing material to said roller.

9. An armored cable making machine comprising a table, a wire reel rotatably mounted at one end of said table, a winding 'drum rotatably mounted at the other end of said table, the wires from said reel being adapted to be fed along said table and into said winding drum, means to drive said winding drum at a higher rate of rotation than said wire reel, thereby effecting a twisting together of said wires as they leave said wire reel, a lever pivoted on said table and carrying a guide roller, an adhesive applying roller for applying adhesive to an insulating tape extending around said guide roller and over said adhesive applying roller, said insulating tape being adapted to be spirally wrapped on said wires so they advance 'while rotating, mechanism operated by said lever in the event of breakage or relaxed tension of said insulating tape for stopping the operation of said machine, a friction roller carried by said table to contact said taped wires and adapted to apply water-proofing compound thereto, and means to supply water-proofing material to said roller, an armor-die, and

feeding mechanism operating to feed metallic covering tape throu h said armor-die into enclosing relation wlth said twisted, taped and water-proofed wires.

10. An armored cable 'making machine comprising a table, a wire reel rotatably mounted at one endof said table, a winding drum rotatably mounted at the other end of said table, the Wires from said reel being adapted to be fed along said table and into said winding drum, means to drive said winding drum at a higher rate of rotation than said wire reel, thereby eecting a twisting together of said Wires as they leave said wire reel, a lever pivoted on said table and carrying a guide roller, an adhesive applying roller for applying adhesive to an insulating tape extending around said guide roller and vover saidadhesive applying roller, said tape chine, a friction roller carried by said tabley to contact said taped Wires and adapted to apply Water-proofing compound thereto, and means to supply Water-proofing material to said roller, an armor-die, feeding mechanism to feed. metallic covering tape through said armor-die into enclosing relation with said twisted, taped and Water-proofed-Wires, and mechanism adapted to be operated by said metallic covering tape upon obstruction` of feeding movement thereof for effecting the stopping of said machine.

11. An armored cable making machine comprising a table, a Wire reel rotatably mount ed at one end of said table, a winding drum rotatably mounted at the other end of said table, the Wires from said reel'being adapted to be fed along said table and into said winding drum, means for applying a taped coating to said Wires during their passage to said Winding drum, and additional means for applying a spirally Wrapped metallic flexible casing to said taped wires, thereby forming a complete armored cable that passes into said Winding drum, said winding drum having an inwardly directed shield-plate positioned in thepath of movement of said cable, said shield-plate acting to deflect said cable outwardly against the inner periphery of said drum.

12. In a machine for` making electric cable having a conductor, supporting means along which the cable conductor is adapted to be moved longitudinally, means for rotating said conductor, means for supplying an insu-k lating tape to said rotatingconducton'said conductor by rotating causing saidtape to be wrapped thereupon in spiral form, transmission means for actuating said conductor rotating meansna driving pulley for operating said transmission means, a drive belt for transmission means, a drive belt for said pulley, means for shifting said belt on and off said drive pulley, a detent means cooperative with said shifting means for holding said belt in driving relation to said pulley, means for biasing said shifting means to belt releasing position, and means operative to release said detent on failure of normal feeding movement of said tape, and additional means also operative to release said detent on failure of normal feeding movement of said metallic cover strip.

In testimony, that I claim the invention set forth above I have hereunto set myy hand A of March, 1929.

this 19th day GUSTAVE A, J HNSON.

sald pulley, means for shifting said belt on and olf said drive pulley, a detent means cooperative with said shifting means for holding said belt in 'driving relation to said pulley, means for biasin said shifting means to belt'releasing position, and means operative to release said detent on .failure of normal feeding movement of-said tape.

13. In a machine for making electric cable.

having a conductor, supporting means along which the cable conductor is adapted to be i moved longitudinally, means for rotating said conductor,- mea'ns v:for 'supplying an insullating tape to said rotating conductor, said conductor for supplyin a metallic coverlstrip to said rotating con uctor, said metallic cover strip being Wrapped in spiral form and enclosing -relatlon to said conductor transmission y rotating causlng saidtape to -be wrapped thereupon in spiral formmeans

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