US2375862A

US2375862A - Apparatus for serving strands upon articles

Info

Publication number: US2375862A
Application number: US527092A
Authority: US
Inventors: Samuel M Martin; Oscar G Nelson
Original assignee: Western Electric Co Inc
Current assignee: AT&T Corp
Priority date: 1944-03-18
Filing date: 1944-03-18
Publication date: 1945-05-15
Anticipated expiration: 1962-05-15

Description

May 1945- 4 s. M. MARTIN ETAL 2,375,862

APPARATUS FOR SERVING STRANDS UPON ARTICLES /N VENTORS 6'. M MAR Tl/V 0. G. A/ LSO/V ATTOR'NE May 15, 1945. s. M. MARTIN ET AL APPARATUS FOR SERVING STRANDS UPON ARTICLES Filed March 18, 1944 9 Sheets-Sheet 2 INVENTORS 62 M MART/IV 0. 6. NE solv AITTO R/VEY May 15, 1945. s. M. MARTIN ET AL' APPARATUS FOR SERVING STRANDS UPON ARTICLES Filed March 18, 1944 9 Sheets-Sheet 3 INVENTORS -52 M MART/IV 0. 6. Ni SO/V May 15, 1945.

S. M. MARTIN ET AL APPARATUS FOR SERVING STRANDS UPON ARTICLES 9 Sheets-Sheet 4 Filed March 18, 1944 INVENTORS ATTORNEY 6. M MA RTl/V 0. 6'. NELSON May 15, 1945. s. M. MARTIN ET AL 2,375,862

APPARATUS FOR SERVING STRANDS UPON ARTICLES Filed March 18, 1944 9 Sheets-Sheet 5 //v VE/VTORS 62 M M/I/PTl/V ATTIOALNEY 9 Sheets-Sheet 6 IIVVENTORS A .5. M MART/IV May 15, 1945.

s. M. MARTIN ET AL APPARATUS FOR SERVING STRANDS UPON ARTICLES Filed March 18, 1944 May 15, 1945. s. M. MARTIN ETAL 2,375,862

APPARATUS FOR SERVING STRANDS UPON ARTICLES Filed March 18, 1944 9 Sheets-Sheet 8 's. M. MARTJN ET AL APPARATUS FOR SERVING STRANDS UPON ARTICLES Filed March 18', 1944 9 Sheets-Sheet 9 wwn mwm an M/VzF/VTORS 62 M. MART/Al 0. 6/1/51; 0/V w I Airok/m Patented May 15, 1945 APPARATUS FOR) SERVING STRANDS UPON ARTICLES Samuel M. Martin and Oscar G. Nelson, Baltimore. Md., assignors to Western Electric Company, Incorporated, New York, N. Y., a corporation of New York Application March 18, 1944, Serial No. 527,092

20 Claims.

This invention relates to apparatus for serving strands upon articles and more particularly to apparatus for serving strands upon the ends of cords.

This application is a continuation in part of our copending application Serial Number 512,006, filed November 27, 1943, now abandoned, for Apparatus for serving strands upon articles.

In the manufacture of communication cords which have stay cords extending therefrom, the ends of the stay cords frequently are formed into loops. Heretofore, to form and lash the ends of such stay cords into loops has been a slow, tedious and expensive procedure.

It is an object of this invention to provide new and improved apparatus for serving strands upon articles.

One device embodying the invention comprises a serving head, means for rotating the serving head, a rod reciprocable along the axis of the serving head, means for reciprocating the rod, and means on the end of the rod adjacent to the serving head for securing the end of a cord thereon.

A complete understanding of the invention may be obtained from the following detailed description of a specific embodiment thereof, when read in conjunction with the appended drawings, in which:

Fig. 1 is a side elevation of one type of apparatus embodying the invention;

Fig. 2 is an elevation of the opposite side of the apparatus shown in Fig. 1 with some parts shown in vertical section;

Fig. 3 is a vertical sectional view taken along line 3-3 of Fig. 2;

Fig. 4 is a fragmentary rear elevation of the apparatus shown in Fig. 1;

Fig. 5 is a vertical sectional view taken along line 5-5 of Fig. 2;

Fig 6 is an enlarged view of a portion of the apparatus shown in Fig. 1;

Fig. 7 is a horizontal sectional view taken along line l 'l of Fig. 2;

Fig. 8 is an enlarged perspective view of a member forming part of the apparatus shown in Fig. 1:

Fig. 9 is an enlarged fragmentary horizontal sectional view taken along line 9-9 of Fig. 4;

Fig. 10'i an enlarged view of a portion of the apparatus shown in Fig. 1;

Fig. 11 is an enlarged fragmentary view of a portion of the apparatus shown in Fig. 10;

Fig. 12 is an enlarged vertical sectional view of a portion of the apparatus taken along line |2--l 2 of Fig. 11;

Fig. 13 is an enlarged vertical sectional view of a portion of the apparatus taken along line l3-l 3 of Fig. 12;

Fig. 14 is a diagrammatic view of a circuit for controlling the operation of the apparatus shown in Fig. 1;

Fig. 15 is an enlarged elevational view of a member forming part of the apparatus shown in Fig. 1;

Fig. 16 is a fragmentary vertical sectional view of an alternative embodiment of the invention;

Fig. 17 is a fragmentary vertical sectional view of a modification of the apparatus shown in Fig. 16; I

Fig. 18 is an enlarged horizontal sectional view of a portion of the apparatus shown in Fig. 16 taken along line I 8-48 of Fig. 16;

Fig. 19 is an enlarged vertical sectional view of a portion of the apparatus shown in Fig. 16 taken along line [9-19 of Fig. 16;

Fig. 20 is an enlarged vertical sectional view of a portion of the apparatus shown in Fig. 16 taken along line 20-20 of Fig. 16

Fig. 21 is an enlarged vertical sectional view of a portion of the apparatus shown in Fig. 16, and

Fig. 22 is an enlarged elevation of a portion of the apparatus shown in Fig. 16.

Referring now to the drawings, one embodiment of the invention, which is illustrated in Figs.

1 to 15, inclusive, comprises a base plate 20 (Fig.

1) mounted upon a work table (not shown). A bearing 2| (Fig. 2) welded to a standard 22 bolted to the base plate 20 serves to support a, tube 25.

Flanged bushings

26 and 21 fit tightly upon the tube 25 to the right of the bearing 2|, as seen in Fig. 2, and an arbor 29 is rotatably secured upon the bushings 2B and 2! by a nut 30 secured upon the threaded end of the tube 25 by a set screw 3|.

A sprocket (Fig. 7) is secured to the arbor 29 by a key 38 and a plate 36 is secured by bolts 3T+3l to a flange 39 formed on the arbor 29. A ball 40 providing a supply of a continuous strand 4! surrounds the arbor 29 and is secured upon the arbor by a guide cap 42 threaded upon the outer end of the arbor. A flanged guide roller 45 is secured to the plate 36 and guides the strand ll from the ball 40 to a pair of discs 46-46 (Figs. 2 and 3) slidably mounted upon an arm 41 bolted to the plate 36. The strand 4| passes between the discs 46-46, which are pressed together by a compression spring 49 to exert a braking action upon the strand when the strand is drawn from the ball 40. A brake shoe 50 pivotally mounted upon a bolt 5| secured to the plate 36 is urged against the periphery of the ball 40 by a torsion spring 52, which is secured to a disc 55 having ratchet teeth 50 -56 formed thereon and cooperating with teeth 51-51 formed on an annular shoulder 59 secured on the plate 36.

A flanged bushing 60 secured upon the left end of the tube 25, as seen in Fig. 2, by a collar 6I fastened thereon by a set screw 62, serves to mount a hub 65 rotatably with respect to the tube 25. A sprocket 66 bolted to the hub 65 may be;

rotated about the longitudinal aXis of the tube 25 by a chain 61 driven by a sprocket 69 (Fig. 3) which is secured to one end of a shaft 10 by a pin 1 I. A sprocket 12 is rigidly secured upon the other end of the shaft 10," which is rotatably mounted in a bearing 14 bolted to a fraine member 16 forming part of a housing 11.

A motor 19 of a conventional type actuates a drive 80 of a suitable type terminating in a shaft BI, upon which a sprocket 82 (Figs. 2 and 3) is keyed. The sprocket 82 drives a chain 85, which rotates the sprocket 12, the shaft 10, and the sprocket 69, thereby rotating the sprocket 66 through the chain 61.

A sprocket 86 (Figs. 2 and 3) secured to the shaft 8I by a pin 81 rotates through a chain 88 the sprocket 35, the plate 36, and the arbor 29 upon the

bushings

26 and 21. As the arbor 29 is rotated, the brake shoe 58, pressed against the ball 40, holds the ball stationary and causes it to rotate with the arbor. An idler 89 (Fig. 9) secured to a stub shaft 90 adjustably secured by a s acer 9I and a nut 92 in a slot 95 formed in a plate 96 of the housing 11 prevents slack in the chain 88.

A rod 99, (Fig. 8) having bearing surfaces I00 and IIII formed thereon is slidably mounted in the interior of the tube and passes through a bushing I05 (Fig. 2) threaded into the left end of'the tube, as viewed in Fig. 2. The right hand end of the rod 99, as seen in Fig. 8, is provided with a slot I06 in which a hook I01 is secured by rivets I'09I89. A compression spring IIO, bearing against one end of the bearing surface I00 and the end of the bushing I05, urges the rod 99 to the right, as viewed in Fig. 2.

A yoke I02 secured to the left end of the rod 99, as viewed in Fig. 2, is connected to a lever III (-Fig. 4) by means of a pin II6 passing through apertures II1--I I1 formed in the yoke and through on open slot II9 formed in one end of an arm I 20 secured to the lever. The lever I II is pivotally mounted upon a pin II5 passing through 'a bracket II2 secured to the base plate 20. A cam follower I'2I, rotatably mounted on the arm I20 by a 'bolt I22 (Fig. 2'), a'nut I23 and a, washer I24, engages a cam I26 secured to the sprocket 66 by bolts I21-I21. When the motor 19 is in operation, the cam I26 is rotated with the sprocket 66 in a counterclockwise direction, as viewed in Fig. 4, and causes the camfollower I2I to reciprocate. to the left, the lever III is pivoted-in a counterclockwise direction; as viewed in Fig. 2, to draw the rod 99 to theleft against the pressure of the spring IIO, When the cam I26 is rotated s the raisedportion of the cam (indicated by the letter Ain Fig." 15) has passed the follower I2I, the follower will be snapped back against'the lowermost portion of the cam, which is indicated by the letter B, as the spring IIO urges the rod 99 to the right, as viewedin Fig. 2. Upon'the next revolution of the cam I26, the operation just described will be'repeated.

"An arcuate kicker I30 (Figs. 5 and 6), adjustably 'secured'tothe sprocket 66 by screws I 3 I--I3 I As the follower I2I is thrust concentrically with the axis of the tube 25, engages a roller I rotatably mounted by a bolt I36 upon a lever I32 and forces the lever against a spring-pressed operating button I31 of a microswitch I39 to open the contacts of the microswitch. The lever I32 is pivotally mounted by a pin I40 on an arm I4I, which is bolted to the standard 22 and supports the microswitch I39. The kicker I30 is so positioned on the sprocket 66 that the foremost portion thereof, indicated by the letter C in Fig. 5, strikes the roller I35 and "positioned equal distances on each opens the contacts of the microswitch I39 just as the cam follower I2I engages the designated 1 portion Bot the cam I26,

A triangular standard I (Fig. 10) resting on a block I46, is pivotally mounted on a pin I41 secured t a bracket I49, which is adjustably secured to the base plate 20 by bolts I48-I48 (Fig. '1) passing through a slot I53 formed in the bracket I49. A U-shap d uide I50 bolted to the triangular standard I45 has a semicircular groove I5I formed therein. A slide I52 having a groove I55 complementary to the groove I5I formed therein is slidably secured in the U- shaped guide I50 by plates I56 and I51 bolted to the guide. A tension spring I59 is positioned in the channel formed by the grooves I5I and I55 and is secured to pins I60 and I6I (Fig. 12) carried by the slide I52 and the guide I50, respectively. The spring I59 urges the slide I52 to the right, as viewed in Fig. 12, against a. projection I66 (Fig. 10) formed on the end of the plate I56. A U-shaped plate I61 is secured to the end of a tongue I69 projecting from the slide I52. A pair of pins I10-l1'0 are mounted in apertures III-I'II formed in the tongue and a pair of hook-shaped clamps I12-I12 (Fig. 13) fit tightly, but slidably, in a bore I13 formed transversely through the tongue I69. when the triangular standard I45 is in the position shown in Fig 10, the U-shaped plate I61 is aligned with the axis of the rod '99, and the pins I1II-I10 are side of that axis.

A' conventional master switch I15 (Fig. 14) operated by a snap lever I16 (Fig. 3) is mounted upon a portion of the housing 11. The housing 11 extends over the ball 40, and has an opening I11 formed in a side I19 thereof concentric with the rod 99 through which a ball of strand similar to the ball 40 may be inserted when the ball 40 has been exhausted, after the guide cap 42 has been removed from the arbor 29. During such an operation the triangular standard I45 is rotated in a clockwise direction, as viewed in Fig. 10, so that the standard will not obstruct the replacement of the ball 40. A door I98 (Fig. l) forming part of the housing, is pivotally mounted by hinges I8-I-I8I to the housing 11 and may be opened to facilitate the threading of the strand 4I over the guide roller-'45 and between the discs 46-46. When the door-l is opened, a tab I82 (Fig. 1) secured to the door releases a springpressed button I85 of a microswitch I86 to open the contacts thereof. When the door is closed the contacts of the microswitch I86 are closed by the action of the tab I82 pressing against the button I85.

An electrical circuit I81 (Fig. 14) controlling the operation of themotor 19 consists of a conventional source of current I 69, the master switch I 15, the microswitch 186, and the motor 19, all mounted in series relationship, and the microswitch I39 mounted in parallel relationship with a switch I88, which may be operated in any suitable manner, such as by means of a push button I83 (Fig. 3).

In the operation of the above described apparatus, a cord I99, comprising an insulating jacket I9I enclosing two conductors I92-I92 and a stay cord I95, is placed on the tongue I69 with the stay cord I95 thereof positioned between the pins Nil-I79 and extending through the U- shaped plate 337. The hook-shaped clamps I72-I72 are drawn from the bore I73, the two conductors I92-I92 are bent back and inserted into the hooked portions of the clamps I72-I72, and the clamps are slid inwardly to the positions shown in Fig. 13 to securely clamp the conductors I92-I92 to the tongue I69 in positions in which they will not interfere with subsequent operations of the apparatus.

The end of the stay cord I95 is then looped over the hook I97 and is drawn slightly taut. The

end of the strand 4 I, which is drawn from the ball 46, is drawn over the guide cap 42 and coiled once or twice over the looped end of the stay cord I95 and held along the stay cord.

At this stage of the operation, the cam follower (2i is directly opposite the lowermost portion (B) of the cam I26 and the spring I I9 is permitted to urge the rod 99 to its extreme position to the right, as viewed in Fig. 2. The arcuate kicker I39 is in a position in which it thrusts the lever I32 in a counterclockwise direction, as viewed in Fig. 6, to operate the button I37 of the niicroswitch I39 and thereby keep the contacts of that microswitch open. The door I69 is closed and the button I 65 of the microswitch I 65 is held in a position closing the contacts of the microswitch I86.

The snap lever I75 is then operated to close the contacts of the master switch I75 and the push button I93 is pressed to close the switch I98 to permit current to flow through the circuit I87, thereby starting the motor 79. The arbor 29 and the ball 43 mounted thereon are rotated in a clockwise direction, as viewed in Fig. 3, around the rod 99, and the strand 4i is wound around the looped portion of the stay cord I95. The cam I26 is rotated in acounterclockwise direction, as viewed in Fig. 4, and forces the cam follower I2I slowly to the left, as viewed in Fig. 2, thereby causing the rod 99, the hook I 97, the cord I99 and the slide I52 to be drawn slowly to the right, as viewed in Fig, 2, against the action of the springs III? and I59. As the looped portion of the stay cord I95 is drawn slowly to the left, the strand M is guided by the cap 42 directly to the stay cord and is thereby wound upon the looped portion thereof in an even lay. The brake shoe i! and the discs 46-46 place the strand 4! under a tension as the strand is withdrawn from the ball 49 and wound upon the stay cord I95.

After the arcuate kicker I36 has been rotated out of contact with the roller I35, the lever I32 is moved in a clockwise direction, as viewed in Fig. 2, by the spring-pressed button I37, which thereby closes the contacts of the microswitch I39. At

this time, or shortly thereafter, the switch I38 is opened. Since the microswitch I39 and the switch I98 are in parallel and the contacts of the microswitch I 39 are closed, the current to the motor is not interrupted by the opening of the switch I88 and the apparatus continues to operate as described hereinabove until the portion C of the kicker I39 causes the lever I32 to open the contacts of the microswitch I39, thereby breaking the circuit and stopping the motor 79.

'3 The kicker I30 is secured to the sprocket 66 in such a position that just as the circuit is thus broken by the microswitch I39, the lowermost portion B of the cam I26 is opposite the cam follower I22 and the action of the springs III] and I59 draws the rod 99 to the extreme right, as viewed in Fig. 2, just as the motor is cut off and the winding discontinued. Thus, only a single uniform layer I99 of winding will be wound upon the portions of the stay cord I adjacent to a loop 200 formed thereby. Throughout the above described operation the spring I59 keeps the stay cord I95 taut to insure uniformity of the application of the strand 4I thereto.

After the foregoing operations are completed, the strand M is severed at a point between the cap 42 and the discs 46-46 and the ends of the portion of the strand wound upon the stay cord I95 are tied to prevent unwinding thereof. The hook-shaped clamps I72-I72 are then slid outwardly in the bore I73, the conductors I92-I92 removed therefrom, and the loop 200 of the stay cord I95 is unhooked from the hook I07 to free the apparatus for operation upon another cord similar to the cord I99.

An alternative embodiment of the invention and a modification thereof are shown in Figs, 16 to 22, inclusive. The apparatus shown in Fig. 16 is designed to apply one or more layers of a strand upon conductors to form built-up portions on the conductors for fitting them into apertures formed in plugs. This alternative embodiment of the invention is, in general, like that i1- lustrated in Figs. 1 to 15, inclusive, except that the rod 99 and the mechanism for reciprocating it have been replaced by other forms of these elements. In the following description of this alternative embodiment of the invention, only that portion thereof which is essential 'for an understanding of its construction and operation is described, and it is to be understood that in all other respects, the construction and operation thereof are identical with those of the embodiment of the invention described hereinabove.

In the embodiment shown in Fig. 16. of the drawings, a base plate 220 is mounted upon a work table (not shown). A bearing 22I welded to a stand 222 bolted to the base plate 220 serves to support a tube 225.

Flangedbushings

226 and 227 fit tightly upon the tube 225 to the right of the bearing 22I, as seen in Fig. 16, and an arbor 229 is rotatably secured upon the

bushings

226 and 227 by a nut 230 secured upon the threaded end of the tube 225 by a set screw 23 I.

A sprocket 235 is secured to the arbor 229 by a key 238, and a plate 236 is secured by bolts such as the bolt 237 to a flange 239 formed on the arbor 229. A ball 249 providing a supplyof a continuous strand 24I surrounds the arbor 229 and is secured upon the arbor by a guide cap 242 threaded upon the outer end of the arbor. The strand 24I passes from the ball 246 between a pair of discs 246-246 slidably mounted upon an arm 247 bolted to the plate 236. The strand 24I passes between the discs 246-246, which are pressed together by a compression spring 249 to exert a braking action upon the strand when the strand is drawn from the ball 240. A brake shoe 250 pivotally mounted upon a bolt 25I secured to the plate 236 is urged against the periphery of the ball 240 by a torsion spring 252, which is secured to a disc 255 having ratchet teeth 256-256 formed thereon and cooperating with teeth 257-257 formed on an annular shoulder 259 secured on the plate 236.

cam 326, similar to the cam A flanged bushing 260 secured upon the left end of the tube 225, as seen in Fig. 16, by a, collar 261 fastened thereon by a set screw 262 serves to mount ahub 265 rotatably with respect to the tube 225. A sprocket 266 bolted to the hub 265 may be rotated about the longitudinal axis of the tube 225- by a chain 261 driven by a sprocket 269, which is secured to one end of a shaft 210- similar to the shaft 10. A sprocket 212 is rigidly secured upon the other end of the shaft 210, which. is rotatably mounted in a bearing 214 bolted to a frame member (not shown) similar to the frame member 16. The frame member forms part of a housing 211.

A motor (not shown) similar to the. motor 19 through a series of gears (not shown) drives a chain 285 (Fig. 16), which rotates the sprocket 212, the shaft 210, and the sprocket 269, thereby rotating the sprocket 266 through the chain 261.

The motor through a sprocket (not shown) similar to the sprocket 86 (Figs. 2 and 3) rotates through a chain 288 (Fig. 16) the sprocket 235, the plate 236, and the arbor 229 upon the bush.-

ings

226 and 221. As the arbor 229 is rotated, the brake shoe 250, which is pressed against the ball 240, tends to hold the ball stationary and causes it to rotate with the arbor. An idler 289 similar to the idler 89 (Fig. 9) rotatably secured upon a stub shaft 290 prevents slackv in the chain A hollow tube 299 having a yoke 302 secured thereon. at the left end, as seen in Fig. 16, replaces the rod 99 and is slidably mounted. in the interior of the tube 225. A work holder 301 having a collar 308 is substituted for the hook 101 and is secured upon the right hand end of the hollow tube 290', as seen in Fig. 16, by a set screw 309. The lever 1 1 1 shown in Fig. 2 is replaced by a lever 3-11 (Fig. 16) and the spring 110 is replaced by a tension spring 310. One end of the tension. spring 310 is secured by a pin 313 to the lever 31 1, which is pivotally mounted on a bracket 312 by a pin 315,. and the other end of the spring 310 is secured to a pin 314 secured to the bracket 312. A pin 3'16 passing through apertures such as aperture 31.1 formed in the yoke 302 passes through an open slot 319 formed. in the upper end of the lever 311 to secure the yoke 302' to the lever 3.11. A lever 320. having a cam follower 321, rotatab1y mounted on the upper end 322 thereof, is pivotally secured by av pin 323 to the bracket 312. The cam follower 321' engages a 12.6, which is secured to the sprocket 266 by bolts 321-321.

A link 328 is pivotally secured to the levers 31 I and 320, and due to the action of the spring 3111 upon the lever 31 1, urges the lever 3Z0'in a clockwise direction, as viewed in Fig. 16. When the motor (not shown) is in operation, the earn 326 is rotated with the sprocket 266 and thrusts the cam follower 321 to the left. as viewed in Fig. 16. As the follower 321 is thrust to the left, the lever 3.11. is pivoted in. a counterclockwise direction, as viewed in Fig. 16', against the force of the spring 3110 to draw the tube 290 to the left. When the, cam 326 is rotated so the raised portion of the cam 326, which is indicated by the letter F in Fig. 20, has passed the follower 325, the follower will be snapped back against the lowermost portionof the cam, which portion i'sindi'cated by the letter G, as the tube 299 is urged to the right, as viewed in Fig. 16, by the lever. 31 1. Upon the next revolution of thecam 326., the. operation just described will be repeated.

and the lever 132.

An arcuate kicker 330 (Fig. 16) similar to the kicker (Fig. 6) is adjustably secured to the sprocket 266 in a manner similar to that in which the kicker 130 is secured to the sprocket 66. A roller 335 rotatably mounted upon a lever 332 and the lever 332 are identical with the roller The roller 335 and the lever 332, which is pivotally secured to an arm 341, are adapted to be actuated by the kicker 330 in a manner similar to that in which the roller 135 and the lever 132 are actuated by the kicker 130 to'operate a microswitch 339 in identical fashion to the operation of the microswitch 139. That is, the kicker 330 engages the roller 335 to open the contacts of the microswitch 339 when the designated portion F of the cam 126 is in the lowermost portion of its circle of rotation, the position shown in Fig. 20.

The bracket 312 (Figs. 18, 19 and 20) consists of a pair of L-shaped plates 340-340, which have elongated slots 343-343 formed in the horizontal portions thereof, adjustably secured to the base plate 220 by bolts 342-342 and a pair of vertical end plates 344-344 welded to the plates 340-340. Each of the vertical portions of the plates 340-340 has a series of holes 346-346 and a series of holes 341-341 formed therethrough. Each of the holes 346-346 in one of the vertical portions of the plates 340-340 is aligned with one of the holes 346-346 in the vertical portion of the other of the plates 340- 340 and each of the holes 341-341 in one of the plates is aligned with one of the holes 341-341 in the other plate.

The pin 315 (Fig. 18) extends through two of the aligned holes 346-346 and one of a series of holes 356-356 formed in the lever 31 1 and is secured therein by cotter pins 351-351. A pair of washers 351-351 (Fig. 18) mounted on the pin 315 space the lever 311 between the plates 340-340. The pin 323 extends through two aligned holes of the series of holes 341-341 and one of a series of holes 361-361 formed in the lever 320'. The distance between each adjacent pair of holes 361-361 is equal to the distance between each adjacent pair or holes 341- 341.. A pair of washers 369-369 (Fig. 20) mounted in the pin 323 space the lever 320 between the plates 340-340, and the pin 323 is secured in its position by a pair of cotter pins 310-310..

The work holder 301 (Fig. 21) has a pair of parallel arms 311 and 312 extending from the collar 300. A pair of spaced pins 313 and 314 are perpendicularly secured to the arms 311 and 3.12, respectively, and project inwardly from the arms. A pair of conductors 315-315 of different predetermined lengths have eyelet tips 311'- 311" secured to the ends thereof. The difference in the lengths of the conductors 315-315 corresponds to the distance between the spaced axes of the spaced pins 313 and 314. Each of the tips 311-311 is placed over one of the pins 313 and. 314' and. thus the conductors 315-315 are attached to the work holder 301.

A. guide cap 360 (Fig. 16) having observation slots 336-381 formed therein is secured to the guide cap 242 by a set screw 362. The guide cap 360 extends beyond the guide cap 242 and serves to guide the strand 241 to the conductors 315- 315 at a point considerably to the right, as viewed in Fig. 16, of the end of the guide cap 242. The guide cap 300 permits a long, reciprocal movement of the tube 299 and the work holder 301 relative thereto.

A strand supply holder 383 (Fig. 16) serves to rotatably mount a cop 384 containing a supply of a filler cord 385. The end of the cord 385 may be drawn through the tube 299, between the arms 31I and 312, and held along the conductors 315-315 to provide a filler between the ends of the conductors 315-315.

In the operation of the modification just described, the eyelet tips 311-311 of the conductors 315-315 are placed over the pins 313 'and 314. The end of the filler cord 385 is then held alon the conductors 315-315, and the end of the strand 24! is held flush with the end of the cap 380 and against the conductors andthe filler cord 385, which is held along the conductors. The motor (not shown) is then started in a manner similar to the manner in which the motor 19 was started in the operation of the first described embodiment of the invention.

The operation of the apparatus just described is then identical with the operation of the first described apparatus, except that the tube 299 is drawn to the left, as viewed in Fig. 16, by the action of the lever 3, the link 328, the lever 329, the cam follower 325, and the conductors 315-315 are tensioned by hand rather than by means similar to the standard I45 and its associated means comprising a portion of the first described embodiment of the invention. Also, the movement of the tube 299 is considerably longer than the movement of the rod 39, as described hereinabove, and thus the length of the ends of the conductors 315-315 which are covered by the strand 2 is considerably longer than the length of the end of the stay cord I95 which is covered by the strand 4L During this operation, the strand MI is guided to the conductors 315-315 by the guide cap 380.

When the portion of the cam 323 (Fig. 20), designated G, is rotated again into contact with the follower 32L the kicker 330 (Fig. 16) opens the contacts of the microswitch 339 and the motor is deenergized. The spring 3m urges the tube 239 again to the right, as viewed in Fig. 16, at this time and the tips 311-311 are disengaged manually from the pins 313 and 314. The end of the filler cord 385 is severed from the remaining portion thereof, after which the operation may be repeated upon another pair of tipped conductors similar to the conductors 315-315. The portions of the conductors 315-315 and filler cord 385 are thus securely bound by the strand 24I in a symmetrical triangular shape forming a built-up section which,

with or without a subsequent covering of cotton braid, as may be required, is adapted to fit into an aperture in a plug (not shown) in which the eyelet tips 311-311 are connected.

By employing a multiplicity of arms and pins similar to the arms 31I (Fig. 21) and 312 and the pins 313 and 314 in a work holder similar to the work holder 301, one or more conductors may be added and the filler cord 385 omitted, if not required, thereby permitting a similar buildup of desired proportions to be applied on multiconductor cords.

The slots 38I-38I (Fig. 21) in the guide cap 383 permit observation of the work holder 3111 and of the serving of the strand 24! upon the ends of the conductors as the guide cap 380 is rotated during the serving operation. The slots 38I-33I also permit observation of the work holder for attaching or disengaging the tips 311-311 from the pins 313 and 314.

32I, and the cam The pins 3I5 (Fig, 16) and 323 may be withdrawn, if desired, from the particular ones of the holes they occupy and may be inserted through others of the holes to vary the angular motion of the upper end of the lever 3H and thereby vary the throw of the rod 299.

For forming loops in stay cords similar to the loop 230, the last described apparatus may be changed by replacing the work holder 301 (Fig. 16) with a hooked work holder 401 having a col lar 438 secured by a set screw 339 to the tube 233, as shown in Fig. 17. For this type of operation, the distance of reciprocation of the tube 293 is shortened to the natural throw of the cam 323 by adjusting the positions of the pins 3I5 and 323, as described above. A standard with a cord holding device thereon similar to the stand ard I45 and the cord holding device thereon may be used, if desired. The apparatus then operates in substantially the same manner as does the first modification.

If it is desired to vary the starting position of either of the work holders 301 or 481, the bolts 342-342 may be loosened, the bracket3I'2 slid to the right or left, as viewed in Figs. 16 and 17, as desired, and bolts 3 12-332 'retighte'ned.

What is claimed is:

1. In an apparatus for serving textile strands upon cords, a rod having means formed on one end thereof for attaching a conductor' to the rod, means for urging the rod in one direction,

means associated with the opposite end of the rod for moving the rod in a direction opposite tothe first mentioned direction,'a serving head rotatably mounted about the axis of the rod and adjacent to the first mentioned end thereof, and means for rotating the serving head about a cord attached to the end of the rod to wind a strand from the serving head around'the'cord. 2. In an apparatus for serving strands upon cords, a serving head, means for rotating the serving head, a rod extending through the serving head and mounted reciprocably along the axis of the serving head, means on one end of the rod for attaching a cord'thereto, means for urging the rodin one direction along the longitudinal axis of the rod, means for moving therod in a direction opposite tothe first mentioned direction, and means for tensioning a cord attached to the rod during movement of the rod. 3. In an apparatus for serving strands upon cord-s, a serving head, means for rotating said serving head, a rod extending through the serving head and mounted for reCipr0cati0n"a10ng the axis of rotation of the serving headyrireans mounted on one end of the rod for attaching a cord thereto, a rotary cam associated with the rod for moving the rod along the axis of rotation of the serving head, and means for controlling the rotation of said cam. 4

4. In an apparatus for serving strands upon cords, a serving head, means for rotating the serving head, a movable rod extending through the serving head and mounted along-the axisof rotation of the'serving head, means for attaching a cord to one end of the rod, a cam, acam follower associated with the rod and the cam for moving the rod,means for rotatingthe' cam to move the end of the rod and a cord attached thereto through the serving head, and means for stopping the last mentioned means after a' predetermined periodof rotation of the cam;

5. In an apparatus for serving strands upon cords, a serving head, means for rotating the serving head, a rod extending through the serv movement, and automatic means ing head and mounted movably along the axis of rotation of the serving head, means for attaching a cord to one end of the rod, a cam, means associated with the cam for moving the rod along .the axis of rotation of the serving head, means for actuating the cam to move the rod and a cord attached thereto a predetermined distance relative to the serving head, means for adjusting the associated means for varying said predetermined distance, and automatic means for stopping the cam actuating means after the cam has been moved a predetermined amount.

6. In an'apparatus for serving strands upon articles, a serving head, means for rotatin the serving head, a member having means for positively attaching an article thereto and mounted for reciprocation along the axis of rotation of the serving head, means for moving the member a predetermined distance along the axis of rotation of the head, means for adjusting the moving means to vary said predetermined distance, and automatic meansfor stopping the last mentioned .means after a predetermined movement of the member.

'7. In an apparatus for serving strands upon elongated articles, a serving head, means for rotating the serving head, a member extending through the serving head for holding an elongated article along the axis of rotation of the serving head, means for moving the article holding member and an elongated article held thereby along the axis of rotation of the serving head. means for tensioning said article during said to stop the means for moving the article holding member alter the article has been moved a predetermined amount.

8. In an apparatus for serving strands upon articles, a serving head, means for rotating the serving head, a member having means for positively engaging an article for holding an article coaxially with the serving head, cam means for moving the article engaging portion of the article holding member through the head, means for actuating the cam means and the means for rotating the serving head, and means for automatically cutting the actuating means after a redetermined movement of the article holdin: member.

9. In an .apparatu for serving strands upon articles, a serving head, means for rotating the serving head, a member extending through the serving head and reciprocably mounted alon the axis thereof, means associated with one end of the member for positively holding an artcle, means associated with the other end of the memher for moving the member and an article held by the holding means along the axis ofrotation of the serving head, means for actuating the moving means, and means for stopping the actuating means after a predetermined movement of the member.

10. In an apparatus for serving strands upon cords, .a hollow arbor, driving means for rotating the hollow arbor, .a rod mounted coaxially in the hollow arbor, a hook attached to the end of the rod for securing the end of a cord to the rod, a rotary earn, a cam follower associated with the cam and the rod,,a second driving means for rotating the cam to actuate the cam follower thereby moving the rod and a ,cord attached thereto along the axis of the arbor, an electric motor for actuating the various driving means. a manually operative switch for energizing the motor, a second switch in parallel with the manually operative switch for maintaining the energization of the motor after the manually operative switch has been opened, means associated with the second driving means for opening the second switch to deenergize the motor after the cam has been rotated through a predetermined arc, a housing partially enclosing the arbor, a door hinged to the housing, a switch associated with the door in series with the aforesaid switches for preventing energization of the motor when the door is open, a cord supporting member, means .for slidably mounting the cord supporting member, means for clamping the cord to the cord supporting member, and means for urging the cord supporting member away from the hook to tension the cord supported therebetween.

11. In an apparatus for serving strands upon cords, a serving head, means for rotating the serving head, a member having means for securing a cord thereto, means for mounting the member slidably along the axis of rotation of the serving head, means for moving the member and a cord secured thereto along the axis of rotation of the head, means for actuat ng the last mentioned means, an electric motor for driving the rotating means and the actuating means, a manually operative switch for energizing the motor, a second switch for maintainin the energization of the motor when the man ually operative switch has been opened, and means associated with the actuating means for opening the second mentioned switch after a predetermined movement of the member and the cord held thereby.

12. In an apparatus for serving strands upon cords, an arbor for retaining a strand supply, means for rotating the arbor, a member having means thereon for securing a cord thereto, means for moving the member and a cord attached thereto along the axis of rotation of the arbor, means for actuating the rotating means, a housing including a door for partially enclosing the arbor, and means associated with the door for preventing rotation of the arbor when the door is open.

13. In a device for serving strands upon-conductors, a serving head, means for rotating the serving head, a rod reciprocably mounted along the axis of the serving head, means on the end of the rod for securing a cord thereto, means forreciprocating the rod with respect to the serving head, and means for adjusting the reciprocating means to vary the distance of reciprocation of the rod.

14. In a device for serving strands upon conductors, a serving head, means for rotating the serving head, a rod reciprocably mounted along the 'axis of the serving head and having a passage formed therein, a strand supply from which a strand may be drawn through said passage, means on one end of the rod for securing a cord thereto, adjustable means for reciprocating the rod with respect to the serving head, and a cap associated with the serving head for guiding a strand to a cord secured to said securin means, said cap having apertures formed there in for permitting observation of the cord.

15. In a device for serving strands upon conductors, a. serving head, means for rotating the serving head, a tube reciprocably mounted along the axis of the serving head, a strand supply from which a strand may be drawn through the tube, a collar having parallel projections formed thereon secured upon one end of the tube, pins secured to the projections for securing a cord to the collar, and means for reciprocating the tube with respect to the serving head.

16. In a device for serving strands upon conductors, a serving head, means for rotating the serving head, a rod reciprocably mounted along the axis of the serving head, a collar having parallel projections formed thereon secured upon one end of the rod, pins secured to the projections in offset positions for securing a cord to the collar, and means for reciprocating the rod with respect to theserving head.

17. In a device for serving strands upon conductors, a serving head, means for rotating the serving head, a tube reciprocably mounted along the axis of the serving head, a strand supply from which a strand may be drawn through the tube, a collar having spaced projections extending parallel to the axis thereof secured upon the end of the tube, pins secured perpendicularly to the projections and extending from the opposed faces thereof in ofi'set relationship, a cap having slots formed therein secured to the serving head for guiding a strand from the serving head to a cord secured to the pins, a cam, means for rotating the cam, means for deenergizing the cam rotating means after the cam has been rotated-through a predetermined arc, a cam follower associated with the cam, a spring-pressed system of levers associated with the cam follower for reciprocating the tube a predetermined distance along the axis of the serving head, and means for adjusting the system of levers to vary the distance of reciprocation of the tube.

18. In an apparatus for serving strands upon cords, a serving head, means for rotating the serving head, means for holding a cord to be whipped, means for reciprocating the holding means relative to the serving head, an electric motor for driving the rotating means and the reciprocatmg means, a switch connected in series with the motor, and means for opening the switch at the end of a reciprocation of the holding means, whereby the motor is deenergized.

19. In an apparatus for serving strands upon cords, a serving head, means for rotating the serving head, means for holding a cord to be whipped, means for reciprocating the holding means relative to the serving head, an electric motor for driving the rotating means and the reciprocating means, a switch connected in series with the motor, means for opening the switch at the end of a reciprocation of the holding means, whereby the motor is deenergized,

and a manually operable switch in parallel with the first-mentioned switch for starting the motor. 20. In an apparatus for serving strands upon cords, a serving head, means for holding a cord to be whipped, cam means for reciprocating the holding means relative to the head, an electric motor for driving the rotating means and the cam means, a switch in series with the motor for starting the motor, a second switch in parallel with the first-mentioned switch, and means associated with the cam means serving to close the second switch shortly after the first-mentioned switch is closed and open the second switch after a single reciprocation of the holding means.

SAMUEL M. MARTIN.

OSCAR G. NELSON.