Patent GB-451410-A (GB)
Title: Improvements in or relating to machines for attaching heels to boots or shoes
IPC: A43D79/00
Filed: 1935-01-01
Abstract: 451,410. Boot-making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., GOULDBOURN, J., and KESTELL, T. A., Union Works. Belgrave Road, Leicester. Jan. 1,, 1935 No. 16281/36. Divided out of 451,350. [Class 17 (i)] Heels and top-lifts, attaching.- Relates to machines of the kind described in Specification 23031/11, [Class 17 (i)], and consists in the provision of a shoe holder encircling the heel end of the shoe, which holder is caused to engage the shoe prior to the clamping of the work and is automatically retracted to release the shoe at the conclusion of the operation. The work clamping plunger carries arms terminating in pads for engaging the opposite sides of the heel end of the shoe to prevent lateral movement when pressure is applied to the shoe. The last engaging plate 181, which may have a last pin if boots are being operated on, is capable of slight lateral play, and is angularly adjustable by a knurled member 193 secured to a worm 191. These parts are pivoted at 195 to a slide 197, and are, normally, held in operative position by a roll 207 engaging a slot 205 so shaped that, as the slide is moved forwardly, the work presser swings forwardly and upwardly to facilitate change of work-piece. A lever 219, pivoted to the slide and engaged by a pin 221 on the work presser, supports a link 213 connected to a shoe-encircling band 71 for raising this band to provide clearance for positioning a new work-piece. The link is pivoted to a vertical slide 117, having ballbearing engagement with a fixed guide .118, and carrying a guide 119 along which the band may be adjusted forwardly and rearwardly by a pinion 123 rotated by a lever 127, the slide being clamped in adjusted. position by a lever 137 engaging a sleeve formed with a block engaging the guide. The band 71 is of strip metal, and is closed on the lower part of the shoe upper by arms 75, 77 pivoted at 79, and each provided with a roll urged by a spring 99 against surfaces 95, 97 of a cam having an arm 103 adjustably connected by a right-and-lefthand screw 107 with a bell-crank lever 113 actuated by a link 141 connected to a bell-crank lever 143 connected by toggle links 149, 151 with the treadle actuated arm 153 described in the prior Specification. The links are urged by a spring 157 to a partially straightened position determined by stops 155 thereon, the spring providing yield when the band has properly engaged the shoe. The side pressers, for supporting the shoe laterally, are described in Specification 451',350. Normally, all parts return to starting position on release of the treadle, but if it is desired to repeat the cycle for spanking on top-lifts, a pawl 169 actuated by a link from a power-oscillated lever 174, described in the prior Specification, is released to drive a ratchet wheel carrying alternate arms and recesses co-operating with a block 163 on the link 161. At every alternate cycle, an arm then arrives beneath the block, and prevents the treadle rising sufficiently to release the band 71 from the shoe, a top-lift being carried into position beneath the heel by means connected with the work support 250. When the machine is used for heel-attaching only, the pawl 169 is held out of action, and a recess is positioned beneath the block 163, to allow the link to descend fully at each release of the treadle.