Patent GB-986989-A (GB)
Title: Donning means
IPC: D01H9/10
Filed: 1962-11-14
Abstract: 986, 989. Donning devices. WILLCOX & GIBBS SEWING MACHINE CO. Ltd. Nov. 14, 1962 [Nov.15, 1961], No. 43026/62. Heading D1D. Apparatus for donning bobbins on a row of spinning-spindles, comprises a carriage movable along the row and carrying donning means and a bobbin reservoir so that they can be moved between retracted and operative positions, means for supporting bobbins above the spindles, resilient means for impaling the bobbins or successive spindles as the supporting-means is withdrawn and means controlled by the spindles for energizing the resilient-measure withdrawing the support. The apparatus is carried by a cradle 21a, Fig. 4, from which bobbins are conveyed by a belt 91 to a reservoir as described in Specification 986,986. The cradle is mounted on a carriage of the kind described in Specification 986,986 which runs on rails on the spinning-frame having exit and entrance cams. So that the cradle can be moved between operative and retracted positions, towards one end it can swivel about a post upstanding from the carriage, and at the other, where the donning- apparatus is situated, it has rollers 84 running on rails on the carriage to an extend limited by adjustable stops 124, 125. This movement of the cradle is produced by a piston moved when pressure fluid is admitted to or exhausted from a cylinder according to the condition of a valve operated by the cams. The cradle is latched automatically when it moves to operative position, the latch being released by the exit cam. The reservoir is inclined and the bobbins descend by gravity between plates 116, the first one in line coming to rest on arcuate supports 136, Fig. 13 where it is supported by a recess in a guide 119, and a plate 121. The supports 136 are pivotable and tend to move apart under the influence of springs 164, when not held by a latch 137. Below the members 136 is a gap between feelers 160, 162, the former being shaped at 161 to position misaligned spindles, and the latter being pivoted by the tip of the spindle as the carriage moves to cause a member 163 to release the latch 137 and allow the supports to separate to free the bobbin. As the carriage moves, a feeler 140, Fig. 2, engages the spindle to rotate a shaft 141 into an arm 165, Fig. 15 linked at 166 to a finger 167 which is thus moved to the chainline position where it prevents the next bobbin prematurely leaving the reservoir. For re-setting the supports, the lever 165 has a cam 168 which engages a roller 169 on one of the support members 135; as the finger moves to operative position, the cam clears the roller and allows the members 135 to separate; as it returns when shaft 141 rotates in the return direction, the cam 168 engages the roller to re-set the supports. To impale the bobbin, the shaft 141 is connected by meshing bevels 143,142 Fig.2 to an arm 145 which is rocked as the shaft 141 is rotated by the feeler 140; one arm is linked at 146, 147 to an arm 147a so that a sleeve 149 descends in guides 150 and compresses a spring 157 around a shaft 155 for a head 156 to force the bobbin released by the supports 136 on to the spindle. These parts including the feeler are restored by a spring 153. In another form, the donning means and reservoir are carried by a plate 407, Fig. 20 which is urged to slide to a projected position by a spring 408, but is held in a retracted position by a rotatable detent 409. The means for releasing the detent may be operatively interconnected with the latch for releasing the doffing-means as described in Specification 986,988 so that the the two means can be projected together or separately. The movement of the plate is controlled by a roller 413 on a slot in a pivoted arm 415 operatively connected to a rod 417 which is pivoted to an arm 419 pivoted to a shaft 420. When the plate is fully projected, it is held by a notch on arm 418 which engages a pivoted catch 419 which is released when a cam-follower is lifted by the exit cam, the rod 417 being moved downwardly to slide the plate into retracted position. The reservoir 426 is fan-shaped and the bobbins are fed by gravity to the donning apparatus in which the first in line is supported by a retractable slide 428, an arcuate member 436, Fig. 21, and a socket 432 on a cup-shaped slide 429. The latter can be lowered against the force of a spring 431 by lowering a rod 448; when this takes place, a member 434 in engagement with.the bobbin tip is depressed to force the bobbin on to the spindle 11. Means are provided for operating the two slides simultaneously as a star which 440 is rotated by engagement with the spindle as the carriage travels along the spinning-frame. The wheel 440 also rotates cam-wheels 444, 445 cooperating with followers 446, 465 respectively. The former controls the slide 429, being connected to one end of a pivoted bell-crank 447 of which the other end is connected to the rod 448. The follower 465 is carried by one end of a lever 466 of which the other end lies in a recess 468 of a member connected to slide 428. When the bobbin is on the spindle it traps a winding T and as the carriage moves it is rotated by a pad 472 and is "screwed" on to the spindle. The lever 447 is also connected to a wedge 449a controlling two spring-urged pivoted blocking members 457 and 458 which prevent the next bobbin in line from moving into the donning-apparatus until the first bobbin has been donned. The pivot 460 in which bell-crank 447 is mounted carries a member 406 which co-operates with a fork 405 of the mechanism described with reference to Figs. 17, 18, 19 of Specification 986,988 for working the intermittent clutch which drives the conveyer feeding bobbins into the reservoir Specification 986,987 also is referred to.