Patent GB-191201866-A (GB)
Title: Improvements in or relating to Pulling-over and like Machines.
Inventor: BOULT ALFRED JULIUS
IPC: A43D13/00
Filed: 1912-01-23
Granted: 1913-01-23
Abstract: 1866. Boult, A. J., [United Shoe Machinery Co.]. Jan. 23. Lasting.-A pulling-over or like machine of the type described in Specification 7005/00, provided with a yielding element operating automatically to cause the grippers to pull the upper about the last, is provided with means under control of the operator, which can, when the yielding element is in operation, retard or accelerate the pulling action of the grippers due to the operation of the automatic mechanism. The rear ends of the updraw levers 6 are connected by springs 4 and rods 5 with cams on the driving-shaft 2, which is adapted to come to rest with the upper under tension to permit the upper to be adjusted by the tip straightening lever 9, or by manipulation of the front ends of the side-gripper levers 6. An updraw control lever 20 is pivoted on a rod 22, and carries a toothed segment 23 meshing with a toothed arm 24 of a rock-shaft 25. The rock-shaft has a second arm 26 extending over the updraw levers and terminating in a flattened head 27, which engages either the upper faces of the levers or bridles 28 which extend round the levers and over the head. The arm 26 can rock in its socket to adjust itself to different relative positions of the levers. The machine frame is provided with a segment rack 30, into engagement with which a pawl rod 32 can be pressed by raising its end 33. The piston 43 of a dash-pot 40 is connected to the lever 20 by a plunger 44. The dash-pot is provided at its rear end with a valve 45 adjustably held up by a screw 46. In the operation of the machine, the gradual updraw as the air leaks from the cylinder 40 is accelerated or retarded by moving the levers 20 in one direction or in the other. A repeated pull may be given to the upper by lowering the grippers by means of the lever 20 and then letting them rise again by releasing the lever. When the upper has been properly pulled, the grippers are locked by pressing-up the pawl 32. The toe-gripper lever may also be provided with a dash-pot. A hand release for the valve of the dash-pot for quickly pulling over the upper is operated by a thumbpiece 50. The machine is preferably provided with a fore-drawing mechanism as described in Specification 3958/11, in which the side grippers are caused to pull the upper forwardly either automatically or by a hand-lever 91. The hand-lever 91 is yieldingly connected to a bar 90, which is attached at its rear end to a lug on a slide 86 moved by a cam 87. The lever 91 is mounted on a rock-shaft 93 pivoted in the frame and carrying a toothed segment which operates, through a pinion 94 extending across the machine to a similar device for the other side gripper, a rack 95 which carries a block forming part of a pivotal coupling between the rack and the adjacent side gripper. An adjustable stop-screw 100, carried by a rotatable block which can be turned to render the stop inoperative, normally controls the movement of the lever 91. The rear end of the toe-gripper updraw 'lever is extended over the operating-cam slide for the side grippers, and is provided with an adjustable stopscrew by means of which the extent of the updraw movement of the toe-gripper relatively to the side grippers is adjusted. Specification 6827/07 is also referred to.