Patent GB-381208-A (GB)
Title: Improvements in or relating to shoe-upper conforming machines
IPC: A43D21/16
Filed: 1931-06-29
Abstract: 381,208. Making boots. BRITISH UNITED SHOE MACHINERY CO., Ltd., Union Works, Belgrave Road, Leicester.- (United Shoe Machinery Corporation ; 140. Federal Street, Boston, U.S.A.) June 29, 1931, No. 18692. [Class 17 (i).] Pulling-over machines for shoe-uppers of the kind described in Specification 12304/03, [Class 17, Boots &c.], are provided with special means situated on one side of the machine for positioning the toe or cap line in relation to the last, and locking the members in the adjusted position. Each side-gripper casing 12, Figs. 1 and 4, is connected to a rack-bar 18 through the medium of members 20, 22 permitting movement of the casing 12 in two directions at right-angles relatively to the rack. One of the rack-bars engages the underside of a pinion 24 on a shaft 26, the other engaging the upper side of a pinion 28 on a sleeve 30. Levers 32, 34 are provided at the same side of the machine for rotating the pinions 24, 28 to position the grippers. By rotating the lever 34 about the pivot 50, Fig. 3, against the action of the spring plunger 45, a bolt 46 engages the slot 48 and locks the shaft 26 and sleeve 30 together so that the lever 34 can then be used to operate both pinions 24, 28 simultaneously. A friction brake 50, which wedges between opposed surfaces on members connected to the shaft 26 and sleeves 30 respectively, is operated through the movement of a lever 74, in the plane of the paper to control the swinging movement of the gripping arms in the manner described in Specification 12304/03. The lever 74 has a pin-and-slot connection with a tubular link 78 which is connected to levers 72, 64 carrying the brake shoe through the medium of a spring 86. As shown, the lever 74 is in its extreme right-hand position and is acting through the spring to apply the brake, but in moving towards the left, which causes the grippers to move inwardly over the shoe, it first relieves the pressure by relaxing the spring and finally effects a positive release of the brake by the engagement of a projection on the tubular link with the end of the rod 76. Rods 90, 92 connected to the shaft 26 and sleeve 30 respectively, are fitted with opposed springs 94, 96 abutting against a bracket through which the rods pass. Rotation of the shaft or sleeve in either direction compresses one or other of the springs which restore both members to their initial positions on release. The lever 74 operates a lug 108 on a rack 110 in the manner described in Specification 12304/03. The rack 110 rotates a pinion 112 which also rotates the pinion 116 and thus drives the rack 118 on the bar 100 which operates the side grippers 10 through the medium of the wedge 104 and the toe grippers 14 through the medium of the connection 102. By adjusting the pinion 116 angularly in relation to the pinion 112, the bar 100 can be moved relatively to the main operating- gear to effect the simultaneous adjustment of the side and toe grippers. The pinion 112, Fig. 6, is fixed on the shaft 114, but the pinion 116 is connected by a claw clutch to a sleeve 122 having a pin-and-spiral slot engagement 128, 130 with the shaft. By rotating the nut 132 through the medium of the handle 134, the sleeve 122 is moved axially and thus also caused to rotate through the agency of the pin- and-slot. The rotation is transmitted to the pinion 116 through the clutch. A locking- pin 144 releasable by a lever 152 fixes the sleeve 122 in set position. The wedge block 104, Fig. 5, carried on the bar 100 which normally moves with the bar as a unit to actuate the grippers, is adjusted on the bar 100 to vary the initial distance between the grippers. Rotation of the hand-wheel 266 in the sleeve 264 rotates the screwed shaft 252 through the medium of spur-and-bevel gear. The pinion on the shaft 252 travels axially as it rotates on the screw and thus also moves the wedge 104 by abutting against the depending lugs thereon.