Patent GB-129809-A (GB)
Title: Improvements in or relating to Heel Breasting Machines for use in the Manufacture of Boots and Shoes.
IPC: A43D87/00
Filed: 1918-07-17
Abstract: 129,809. British United Shoe Machinery Co., (United Shoe Machinery Corporation). July 17, 1918. Breasting. - In a heel-breasting machine of the type in which the knife is given a constant stroke and the shoe is positioned prior to the action of the knife to prevent the shank of the shoe from being cut, the shoe is rested on a support 14 at the upper end of a post 12 pivoted at 10 to a jack member 4, which is supported by a spring 8. The top-lift of the heel is engaged by a tread-plate 16 clamped, after longitudinal adjustment, to an angularly adjustable member 18, which is pivoted to a slide 26. This slide carries a pin 30 normally held by a spring 50 at the upper end of a slot 32 in a member 34, which is supported for vertical adjustment by a screw 46 passing through a nut 42 pivoted at 44 to a lever 36. A rod 52, pivoted to the lever 36 and passing through an overhanging portion 54 of a bracket 64, carries check-nuts 56 and is surrounded by a strong spring 58, which is held compressed when the machine is at rest by a roll 59 on a slide 96. This slide is connected by a rod 100 to a crank-pin 102 on a disk 104 fixed to a drive-shaft 106, and supports a knife-holder 88 in which is clamped the breasting- knife 86, the upper end of which is supported against movement by an adjustable stop-screw 92. The bracket 64 has pivoted to it one end of a lever 60, between which and a projection 68 on the slide 26 is locked a spring 66, the other end of the lever being connected by a link 70 to a slide 72, which supports a shank stop 76; a screw 80 threaded through a projection on the slide is adapted to bear on the top face of a. bearing 74 through which the elide operates. The lower end of the jack member 4 is formed of a series of plates 110 extending between projections 112 from the machine frame and slotted for the passage of a rod 116, which carries a spring 134 and a block 130 on which is mounted a roll arranged to be engaged by a projection 132 on the disk 104. Between each pair of plates 110 and outside the outer plate are arranged plates 120 which, when the spring 134 is permitted to move the rod 116, clamp the plates 110 against the machine frame and lock the jack. Depending from the lever 60 is a treadle rod 150 which passes through a member 154, Fig. 3, rotatably connected to a treadle 152, and carries a spring 160. The treadle also controls a release and resetting mechanism for a one-revolution clutch for driving the shaft 106. In operation, after the work has been positioned on the support 14 and the post 12 swung into the machine, the treadle 152 is slightly depressed to move the lever 60 downwards, the spring 66 acting against the spring 50 so that the tread-plate 16 bears lightly against the top-lift of the heel. Further depression of the treadle brings the stop 76 against the shank and forces the shoe downwards until the stop-screw 80 engages the bearing 74, after which the spring 160, which is stiff enough to overcome the springs 66, 8, is compressed and the clutch is thrown into gear. The disk 104 then releases the spring 134, whereupon the jack is locked against movement, while the spring 58 is also released to force the tread plate 16 with clamping pressure against the top-lift. The knife then descends and breasts the heel; as its carrier 96 returns, the spring 58 is again compressed to relieve the pressure of the tread-plate, and the jack-locking mechanism is also released. Finally, as the treadle is allowed to rise, the stop 76 and tread-plate are lifted off the shoe, which is then swung forwards on the post 12 outwards from the machine.