Patent GB-608456-A (GB)
Title: Improvements in or relating to machines for operating on edges of shoe soles
IPC: A43D95/22
Filed: 1946-02-25
Abstract: 608,456. Automatic shoe making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., and HART, T. W. Feb. 25, 1946, No. 5745. [Class 17(i)] Relates to machines wherein the work, held by a jack. and a tool, e.g. an edge setting or burnishing tool, are automatically given relative movement to transfer the point of operation of the tool around the sole edge, during which movement the presentation of the work and the tool to each other is automatically controlled in accordance with the shape of the shoe sole, and is intended to relieve the effort required by the operator to bring the tool into engagement with the work, and during operation. The invention is described as applied to an edge setting machine generally similar in construction to that described in Specification 472,842 as regards the means for controlling the pressure of the iron against the sole as the sole moves past the iron. The belt controlling mechanism and iron oscillating mechanism are similar to that described in Specification 246,213, [Class 17(i)]. A starting handle 39, Fig. 1, which is operated slowly to start the machine into operation is coupled yieldingly through a spring 43 to a control lever 41 pivoted at 56. The lever 41 is subject to the resistance of a spring (not shown) corresponding to the spring 169 in Specification 472,842 and, at first, the lever 39 moves relatively to the lever 41 to move a. valve-operating pin 45, Fig. 2, to open a valve 47 to allow oil under pressure to move a piston 3 upwardly. The piston rod 1 connected to piston 3 causes the iron to be moved into engagement with the work, the belt mentioned above to be tightened through a cam 19 and cam lever 29 to operate the belt tightening arrangement by which oscillatory movement is given to the iron. and the iron to be pressed against the work by compression of the spring 49 against which the rod 1 thrusts. Slots 53, in which ride pins 7 secured to the lever 41, afford a lost motion connection between the starting mechanism and the mechanism which moves the tool into engagement with the sole. A side face 51 of the cam 19, Fig. 5.. as the piston 3 continues its upward movement and compresses the spring 49, moves past the cam roll 25 and moves a bar 37 to cause the belt to be held in tightened condition during operation of the machine until it is automatically released just before the last traverse of the sole past the iron, through mechanism similar to that described in Specification 472.842 As the lever 39 approaches the end of its movement in a direction to start the machine the lever 41 engages a stop and the lever 39 is moved until it is locked in the manner described in Specification 14,696/08 [Class 17]. Before the lever 41 reaches its stop it opens a valve 57 which controls the hydraulic movement of a work supporting jack which is operated to traverse the work past the edge setting iron as described in Specification 472,842 The belt is loosened and oscillation of the iron stopped in the manner and by means also described in that Specification. Specification 456,364, [Group III], also is referred to.