Patent GB-131737-A (GB)
Title: Improvements in or relating to Machines for Operating on Heels.
IPC: A43D79/00
Filed: 1918-08-29
Abstract: 131,737. British United Shoe Machinery Co., (United Shoe Machinery Corporation). Aug. 29, 1918. Heels, machines for. - A machine for attaching a heel in two sections to a shoe, such as a leather deck and then a rubber lift, is arranged so that, following a measuring movement, the jack and die are moved relatively by power first through a predetermined distance for the attachment of the deck and, in the next cycle of the machine, through a greater distance for the attachment of the rubber lift. The invention is described as applied to the heel-attaching machine described in Specification 3314/91. The work is. supported on a jack comprising adjustable toe and heel posts 95, 92, Figs. 8 and 9, rising from a body part 86, which is provided with stems engaging sockets in a base 14 shaped to slide in a carriage 12; a pair of springs 87 normally tends to elevate the body part 86 above the base 14. Toggle links 88 connected by a bar 89 are arranged on each side of the jack and are adapted to be operated by a handle 90 so that, when the toggles are straight, the body part 86 will be elevated above the base for the attachment of the deck section, Fig. 8, and when they are broken, Fig. 9, the body part will rest on the base to compensate for the increased thickness of the work due to the presentation of the rubber lift. A pair of pivoted counter clamps 104 and a back gauge 108 are carried bv a slide 99, which is arranged to move with the body part 86 of the jack during its adjustment. The leather deck to be attached is held in a holder comprising a pair of spring fingers 72, Fig. 6, while the rubber lift. is carried in a holder comprising a flanged spanker plate 74 provided with nail drivers 78. These holders are carried by a rotatable hub 70, and are adapted to be swung in turn by the operator into operative position above the heel of the shoe. The jack carriage 12 is carried by a support 8, Fig. 1, and is maintained above the support by a quick screw 30, which is adapted to be raised, to calliper the work, through a rack and pinion 32, ben-crank lever 34, and a link 36 on the depression of a treadle 38. The support 8 carries two adjustable stops 52, 54, Figs. 3 and 4, adapted to engage, respectively, the upper surface of a stationary abutment 6 and the inner end of a pivoted lever 58. This lever also carries a roll arranged to bear upon the periphery of a notched cam disk 56, which is loosely mounted on a shaft journaled in the abutment 6, and is adapted to be advanced one step at each power operation of the machine; a dog 66 prevents reverse movement of the disk. 'The shaft carrying the disk is rotated by connexions with one of the usual sliding side rods 16 of the machine, the other side rod being similarly connected to rotate a second shaft 40 journaled in the support 8. These shafts carry eccentric cams 42, 46 which, when the shafts rotate, cause the support 8 and its associated parts to be raised. In operation, with a high part of the cam disk 56 operative to render the stop 54 effective in relation to the support 8, Fig. 3, with the jack elevated, Fig. 8, and with the leather deck positioned above the heel of the shoe, the treadle 38 is first lowered to measure the work and then the power is thrown in to oscillate the cams 42, 46 to elevate the support 8. When the work is under pressure, the usual drivers 20, Fig. 1, force the attaching nails through the deck and into the heel seat. During this movement the cam disk 56 is advanced one step, and when the machine stops, the position of the support 8 is determined by the stop 52, Fig. 4, instead of by the stop 54. The rubber lift is then moved over the heel, the handle 90 is moved to break the toggles and lower the jack, Fig. 9, and the treadle 38 is again depressed to measure, the work When the power is again thrown in the support 8 is raised through a greater extent to compress the rubber lift and to force the nails with which it has been previously loaded into the leather deck. To prevent the leather deck from being presented to the machine when the mechanism is set for the greater movement of the support 8, the outer end of the lever 58, Fig. 1, is connected to a vertical rod 82 which carries a finger 83 extending, when the stop 54 is operative, into such a position that it will be engaged by a short bar 80, Fig. 6, on the hub 70, and thus prevent the hub from being moved sufficiently to carry the deck over the heel.