Patent GB-600832-A (GB)
Title: Improvements in or relating to heel-attaching machines
IPC: A43D79/00
Filed: 1945-04-28
Abstract: 600,832. Shoe-heel attaching machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., BARKER, W. A., and CLARKE, T. B. April 28, 1945, No. 10755. Addition to 555,979. [Class 17(i)] The machine of the parent Specification is modified in that the manually operated means for moving the common carrier on which the fastener inserting and heel supporting means are mounted for to-andfro movement relative to the shoe support are replaced by power operated means. The invention is described as applied to a machine having a shoe support, a heel support, and means operated on depression of a treadle for positioning these supports in location to receive a plurality of fasteners in the heel seat with parts projecting therefrom, and means to prick a plurality of holes in the heel to receive such projecting parts of the fasteners all constructed and arranged substantially as described in the parent Specification and Specification 580,814. The fasteners may be of the kind described in Specification 579,680 and 585,246, [Group XXV]. After the common carrier 5, which is similar to that described in Specification 580,814, has been moved by power means to its right hand position, in which the heel support is brought under the shoe support with the nails projecting from the shoe in register with the holes pricked in the heel, the operating treadle is again depressed to initiate a second power operation in which the shoe and heel are caused to be firmly pressed together and attached, and the fastening-inserting mechanism reloaded. The mechanism which moves the carrier 5 includes a spring 37 behind a piston 35 in a cylinder 31 and which is rendered effective by the power means prior to insertion of the fasteners when the power means become inoperative. In order to prevent violent action of the spring 37, when it is released by operation of a treadle-controlled clutch, after said clutch has automatically brought the machine to rest after insertion of the fasteners, escape of air from the cylinder 31 is controlled by an adjustable valve 43. Movement of the carrier 5 on release of the spring 37 is retarded near the ends of the movement by a frictional slip connection between the carrier and spring, which becomes operative when a stop member meets a co-operating member. A rocking arm 7, corresponding to the arm 141 in Specification 580,814, and operated and functioning in similar manner, has a further connection, comprising a telescopically-adjustable link 15, to effect movement of the carrier 5. The lower end of the arm 15 is connected to the outer one of a short arm 17 freely supported on a horizontal shaft 19 journalled in a bracket in the machine frame. An arm 23 fixed to the outer end of the shaft 19 has lugs which interengage with lugs on the arm 17 so that when the arm 17 is turned downwardly through the link 7 during the power operation of the machine the arm 23 also is moved down to turn the shaft 19, but on upward movement of the arm 17 the arm 23 remains latched until later released. An arm 27 on the shaft 19 bears against the upper end of the plunger 29 of the cylinder 31, mentioned above, to compress the spring 37, in which position it is latched by engagement of a latch piece 45 on a latch member 47 with a block 49 on a quadrant member 51 integral with a third arm fixed on the shaft 19. A gear wheel 55 is rotated on its shaft 57 by the member 51 to cause a pawl 65 to engage in one of two notches 67 in a disc 61 on the shaft 57 to turn the disc and shaft through 180 degrees. During compression of the spring 37 the pawl 65 tracks idly over the notches 67. An upwardly extending rod 73 is pivoted at its lower end on an eccentric pin on the shaft 57 and at its upper end to a toothed quadrant member 75 fixed on a pin 93 which when turned effects requisite movement of the carrier 5 through toggle-links 95, 97. The latch member 47 is released by a rod 101 connected to the treadle 103 to allow the spring 37 to expand to cause the carrier 5 to be moved. Frictional resistance of a two-part ring member 125, 127 (not shown), having a leather lining clamped around a collar 129 (not shown), to turning movement of the collar secured on the pin 93, brakes movement of the carrier 5 as it comes to the end of its stroke in each direction. A handle 145 (not shown) may be turned manually to cause the common carrier 5 to be moved by engaging teethed members 143 (not shown), 137 normally held out of engagement by a weak spring 149 (not shown) should it be necessary to do so. An alternative form of release mechanism (not shown) which prevents the second cycle of operations from following on immediately after the first cycle by making it necessary for the operating treadle to rise again after being depressed is described (Fig. 3). Specification 23031/11, [Class 17 (i)], also is referred to.