Patent GB-485010-A (GB)
Title: Improvements in or relating to machines for lasting boots or shoes
IPC: A43D113/00
Filed: 1936-11-17
Abstract: 485,010. Sewing-machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., WOODCOCK, R. B., and BARTON, F. Nov. 17, 1936, No. 31405. Addition to 447,062. [Class 112] In a machine for lasting Veldtschoen having auxiliary shoe-positioning means as described in the parent Specification, the latter means is controlled by a member which is moved in the same direction to render the shoe-positioning means operative and to render it inoperative, and the controlling member is arranged remote from the sewing position and formed for easy operation by the operator's hand or arm. The auxiliary shoe-positioning member is actuated, as in the parent Specification, by a link 5 pivoted to a member 19 which is oscillated by a three-armed lever 10 driven by a cam on the main shaft of the machine ; in the position shown the member 19 oscillates about a roller 32 at its end, which rests against the end of a cam lever 31, and its movement does not affect the link 5, but when a link 40, pivoted to the lever 31, is pulled downwards a pin 41 thereon allows latch 23, pivoted to the link 19 at 51, to move down under spring-pressure into engagement with a shoulder 43 so that the pivot 51 becomes the fulcrum of the member 19 and the link 5 is rendered operative. The link 40 is pivoted at its lower end to a lever 42, pivotally mounted at 44, which pivotally carries a lever 46 having arms 47, 48 for engagement with lugs 49, 50 on an oscillating sector 52 driven from a lever 56 engaging a ridge cam 58 on the main shaft. A third arm of the lever 46 is slotted to engage a pin 60 on the end of a link 61 which is pivoted at 63 and is movable between stop lugs on the lever 42. A three-armed lever 62, also pivoted at 63 and movable between stops 82, has two depressions in its upper edge to receive a pin 64 on the upper end of an operating link 65 which is actuated by spring-returned Bowden mechanism 76 from a push-down bar running along the front of the work-table. A link 72 (behind the lever 62), pivoted on the pin 64, carries a pin 73 which engages a slot in the lever 62 and is connected by a spring 75 to the link 65. When the link 65 is pulled downwards, the lever 62 is rocked in a clockwise direction, a spring 78 connecting it to the pin 60 moves across the pivot 63 and the link 61 is therefore pulled downwards and rocks the lever 46 in an anticlockwise direction ; the motion of the lever 62 also carries the pin 73 to the left, so that the link 65, when released, is pulled across by the spring 75 to lie on the other side of the pivot 63. The sector 52 is shown in its highest position ; on its downward movement after the actions described above have taken place, the arm 48 of the lever 46 moves into the path of the lug 50 until the pin 60 engages the lower stop on the lever 42, and on the return movement of the sector 52 the lever 46 is raised by the lug 50, thus rocking the lever 42 in an anticlockwise direction to pull down the link 40 and set the link 5 in operation. A second pull on the link 65 returns the parts to their original position in a similar manner.