Patent GB-138499-A (GB)
Title: Improvements in or relating to pulling-over machines
IPC: A43D13/00
Filed: 1919-04-22
Abstract: 138,499. Gimson & Co., and Bagshaw, C. M. April 22, 1919. Pulling-over machines are arranged so that the stretching movement of the grippers may be effected partly by a treadle and partly by power, or wholly by the treadle or wholly by power, the subsequent wiping-in movement being accomplished by power. The grippers 8, 9, Fig. 1, are connected by links 10, 11 to a slide 12 pivotally connected by a link 14 to a spring-controlled treadle 15, which is extended at 18 and connected by links 19, 20, 21 to a rack 22. This rack passes freely through a block 37, Fig. 4, mounted to swivel in the forked ends of a lever 23 which carries a roller 26 adapted to co-operate with a cam 25 on a machine shaft 7. A pawl 40, Fig. 6, pivoted to the block 37 is held to the rack by a counterweight 41, which, however, is adapted to be tripped by engagement with an adjustable stop 42; the rack may also be locked. to the block 37 by inserting a pin into holes 43, 44 in the rack and block respectively when these holes are moved into register with each other. The shaft 7 is geared to a clutch.shaft 4, Fig. 1, the clutch members 27, 28 of which are normally held open by a spring 34, but are adapted to be closed by a link 29 connected by a slide 30 and link 31 to a hand-lever 32. The slide 30 carries a roller 36 adapted to co-operate with a disk 35 on the shaft 7; this disk is formed with two gaps 46, 47, Fig. 4, the former of which is, for a certain operation, closed by a filling-in piece 48. In one way of using the machine, the rack 22 and block 37 are locked together, and the gap 46 is not filled in but, in the normal position of the machine, is occupied by the rollers 36. After the work is placed in position, the treadle 15 is depressed to close the grippers and stretch the upper to any desired extent, and at the same time the roller 26 is lifted from the cam 25. The hand-lever 32 is then moved to start the machine. and, if the hand-lever is at once released, the roller 36 drops into the gap 47 to stop the machine at the end of this part of the cycle; the highest part 49. Fig. 4, of the cam 25 then occupies a position beneath the roller 26. If only a partial depression of the treadle is made before the machine is started, or if the treadle is not depressed at all, the. remaining part, or the whole, of the uplift of the lever 23. as the case may be, is effected by the cam 25. The lever 32 may be held depressed until the gap 47' has cleared the roller 36, when the machine will run on, so that the wiping-in operation follows the updraw without any stop. In another arrangement, the pin is withdrawn to release the rack 22 from the block 37, and the gap 46 is closed by the filling-in piece 48. In this case, in the normal position of the machine, the roller 36 occupies the gap 47, and the lever 23 is held in its highest position by the cam 25. When the treadle is depressed to stretch the work, it is held in the lowest position into which it has been moved by the engagement of the pawl 40 with the rack 22. When the handlever 32 is moved to throw in the power of the machine, the upper is wiped in and tacked with. out any further updraw. The hand-lever 32 may be connected to a second treadle to leave both hands of the, operator free to manipulate the work. Specification 128,694 is referred to.