700,569. Winding thread. COSMAN, C, A., COSMAN, D., and COSMAN, E., [trading as ELECTRONIC METAL TREATING & BRAZING CO.]. June 28,1951 [June 28,1950], No. 15424/51. Class 120(2) A method. of winding a bobbin having a flanged end is characterized in that the thread is retained against the flange, the bobbin is then rotated to wind a number of layers of thread thereon. and, after releasing such retained end of thread, the winding of the bobbin is then completed. A machine for carrying out the method comprises: - Bobbin spindle shafts and drive mechanism. (Figs. 2. 29). A motor 90, through belts 94 reduction gear 86, drive shaft 96 and worm and wormwheels 112, 107; 113, 108, drives the spindles 81 and 84 which, in turn, through spur gears 118, 122. 128; 119, 123, 129 drive the other two spindles 82; 83 Bobbin-driving heads. (Fig. 15). Each spindle, e.g. 81, is furnished with a spring- urged bobbin centering pin 145, with a conical head 147, and a spring-urged driving head 131 carrying a rubber inset 158. An enlarged portion 139 of a fitment to the spindle carries a further rubber ring 149 and the drive from the spindle 81 to the head 131 is through pins 164. Bobbin-presser head (Fig 15.) Each bobbin counterpresser, mounted in a bearing block 181 comprises a spring-urged rod 166 carrying a centering head 172 held for rotation in a holder 168 by a snap-ring 176 and rotated in a ball race 177'. Bobbin conveyer (Figs. 11, 14). Four bobbins at a time are moved from beneath a magazine 221 to a position to be taken up by the winding spindles 81 ... 84 beins conveyed by a carriage 213 which moves on rails 222, 223, the carriage having thereon a cradle 228 with four pairs of aligned V- shaped notches 234 in which the barrels 64 of the bobbins 63 rest. The cradle 228 is normally carried by rods 216, 217 on the carriage 213 but may be raised therefrom (see below). Bobbin magazine (Figs. 1, 11). The bobbin magazine 221 comprises f o u r pairs of channel-shaped racks 244 in which the bobbins are vertically stacked. The bottom portions of the racks are closed by a plate 271 having transverse openings 272 which may be registered with the racks to feed bobbins 63 to the cradle 228. L-shaped brackets 278 attached to the plate 271 extend between the pairs of racks to support the upper pile of bobbins as the lowermost bobbin of each pile is fed to the cradle 228. Bobbin-carriage drive (Figs. 2, 26). The motor 290 drives, through a known torque - limit switch 297 reduction gearing 298, to drive, through a coupling 302 a shaft 303 which drives a wormwheel 314 to rotate an arm 316 to oscillate a compound lever 323 about a pivot 324, the lever 323 comprising two limbs 327, 328 leaving a slot 322 therebetween in which a stud 321 on the arm 316 engages, and an associated switch 332. An eccentricallymounted roller 351 on the end of the lever 328 engages between the bars 352, 353 of the carriage 213 to reciprocate the same. Movement of the carriage 213 to the right (Fig; 11) brings it into contact with an adjustable stop 355 to move the plate 271 against spring pressure 288 to release the lowermost bobbins from their magazine racks. When the carriage, 213 moves to the left (Fig. 11) an adjustable stop 361 (not shown) contacts the front end of the cradle' to cause it to rise on ramps 239 to bring the four bobbins into position to be gripped between the spindle shafts and presser heads. On the shaft 315 of the wormwheel 314 is a cam 370 which engages a carriage limit switch 671 so that the winding cycle shall be started at the correct time. Bobbin indexing cam (Figs. 2, 15). In order that the thread may be gripped between the bobbin' 63 and rubber ring 149 correctly, a lever arm 359 is positioned in the line of 'movement of the ends of the bobbins while they are resting in the cradle 228 so that it engages between the toothed portions of the bobbin heads 65 and turns them to the same relative position. Bobbin-presser head retracting mechanism. (Figs. 8, 14, 26). The bobbin presser heads 172 are operated by a shaft '365 upon which are mounted forks 366, 337; carrying rods 369 which engage behind collars 208, on adjacent rods 166, which are then operated in pairs. The shaft 365 is, operated by the cam 388 on the shaft 315 which, through a spring-urged bell-crank 384 operates an adjustable rod 374 to move a lever arm 372 fixed to the shaft 365. Also connected to the rod 374 is a rod 394 connected to a spring-biased armature 412 of a solenoid 413 (see below). Thread-traverse guide (Figs. 2. 8, 14, 29. 41). The traverse guides 415 are slidably mounted in pairs on rods 416. 417 moved uniformly and in opposite directions, each guide comprising vertically-aligned upper and lower guide wires 423, 424. These wires are bent, as shown in Fig. 41, so as to be easily-threaded by lateral movement of the thread with respect thereto. The guides, which are maintained in their correct positions by sliding contact with rods 432, are reciprocated with the rods 416, 417 by a cam 455 driven by worm and wormwheel gearing 477, 452, 453 from the drive shaft 96, the cam 455 having a slot 476 in which followers 474, 475 engage. Each guide 415 is normally attached by a spring-urged hook 436<SP>1</SP> thereon to a .member 439 fixed to the rod 416 (or 417), a spring 444 urging the guide 415 into close relationship with member 439. In order to stop the reciprocation of the guides 415 with the rods 416. 417 and to enable the guides to be held by spring- urged hooks 508 when the winding of a new bobbin is to be initiated, rods 477 are operated to release the hooks 436<SP>1</SP>, the rods 477 being attached to and moved by a shaft 492 geared to the shaft 365 and moved oppositely thereto. Measuring stop-motion (Fig. 2). Through a connection 488 a counter device 489 is driven to indicate the number of revolutions of the spindles and after a predetermined number, a switch 490 is operated to stop the motor 90. Traverse guide locking mechanism (Figs: 8, 14). This mechanism comprises a bail 503, spring-pressed at 509 and having fingers 506 provided with the hooks 508 which latch the thread guides against reciprocation as set forth above. Thread-tensioning mechanism (Fig. 38). Thread from supply spools 573 is led through tensioning devices 574, 575 of the spaced-disc type, thence over a control arm 576, beneath a roller 519 on a rod 517 the roller 519 moving to equalize the tensions of the four separate threads, by turning at the average speed thereof, and finally, over a roller 531 of a spring-urged tension-regulatory arm 528. The arms 528 are limited in regard to their uppermost position by a trip rod 542 associated with which is a tension-limit switch 546 which operates to stop the motor 90. In the downward motion of the arms 528, they contact a spring-biased bumper rail 552 which, upon the tension becoming excessive, moves to actuate a tension-release solenoid 566 which operates. a lever 561 to pivot the arms 528 downwardly to relieve the tension. Thread-cutting and thread-gripping mechanism (Figs. 8, 14). The track 223 of the carriage 213 is provided with notches 577 which register with the winding spindles 81 ... 84. Notches 584 in a plate 585 above the track 223 register with the notches 577 to position the thread vertically and adjacent to the bobbin-driving heads 131. The main lever 323 in its oscillation moves a rod 911 which, through a lever 877 moves a bar 876 associated with a movable frame 865 to operate spring-biased pivotally-mounted clamp jaws 891 so that they grip the threads against pivoted jaws 903; the thread having been guided into position by spring-urged pivoted arms 848 having vertically aligned notches 854, 855. The threads held in the clamps 891, 903 and lying across the bobbin driving heads 131 are then cut by scissor blades 838, 842 the blades 838 being operated by a bar 588 through a double-lever 592 actuated by the carriage 213. The bar 588, through a wire 817, also controls the thread traverse-guide restraining hooks 508. During,the thread clamping and cutting, the tension arms 528 are released.by a finger 920 (not shown) on the carriage 213 striking the plunger 921 of the tension-limit 748 to de-energize the solenoid 566. Bobbin-disposal and storage (Figs. 26, 28). As the wound bobbins are doffed in pairs they fall into hoppers 954 the bottom spring-urged closure member 965 of which is periodically slid by contact of the carriage 213 with a block on a rod 985 (not shown) to release the wound bobbins which then fall through shoots 945 whereby they are positioned vertically in boxes 924. The bobbins in each box 924 are periodically moved by reciprocating fingers 993 which pass through slots 932 in the box and are moved by a bar 998 connected to the main lever 323. A manual device 1031, 1034 is provided so that the fingers 993 may be hand-operated, if desired. With the box 924 in bobbin-receiving position,' a switch 940 is closed. An oil pump 498, Fig. 2. is fitted and driven from the shaft 96 so that the gear box 86 may be supplied with oil. Control circuit (Fig. 43). Energized from mains M1 M2 this circuit comprises essentially (a) a starter press-button switch 607, (b) a main power relay 601 with ganged jumpers 619, 622, (c) a switch 490, normally open and connected with the bobbin-rotation counter 489, (d) a manually-operated, normally open trip switch 637; (e) a relay 644 with ganged jumpers 667, 700, 700<SP>1</SP>, and 660, (f) a wound-bobbin receiving box switch 940, closed by a jumper 648 when a box is in receiving position, (g) a tension-limit switch 546 associated with the thread-tensioning arms 528, the switch being normally closed by a jumper 653 when the thread-tension is normal, (h) a stop-switch 657 normally closed by a jumper 658, (i) a carriage limit switch 671 (j) a power switch 674, (k) a motor relay 676 comprising ganged jumpers 678, 679, 681 for connecting 3-phase power P3 to the main motor 90,