Patent GB-385303-A (GB)
Title: Improvements in or relating to automatic machines for operating upon boots or shoes
IPC: A43D95/22
Filed: 1931-06-17
Abstract: 385,303. Boot - making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. and KEALL, F. B., Union Works, Belgrave Road, Leicester. June 17, 1931, No..17539. [Class 17 (i).] Edge-setting.-Relates to automatic machines for operating upon a marginal portion of a boot or shoe sole, the machine being of the class in which the work, held by a jack, and a tool are given an automatic relative traversing movement to transfer the point of operation round the sole, during which movement their relative aspect is automatically varied in accordance with the shape of the sole margin, and consists in employing the angular movement of the tool to control the direction in which the tool is pressed against the work. The machine is a further development of those disclosed in Specifications 14696/08, [Class 17, Boots &c.], 309,054, [Class 17 (i), Boots and shoes, Apparatus for making &c.], and 341,417. The tool carrying head 4 is so mounted as to be capable of bodily movement in two directions at right angles, but is constrained against bodily movement in the direction perpendicular to these directions, and the head is also capable of tipping movement about an axis substantially parallel to the direction in which it is constrained against bodily movement, which axis passes substantially through the tool. For these movements, the head 4 is supported by a roller 17 engaging an arcuate groove in the head, the axis of the groove passing substantially through the face of the tool. The roller 17 is carried by a member 19 linked at 24 (which corresponds to the rod 172 in Specification 309,054) to spring supporting means. The head is also linked at 7 to a shaft 8, which in turn is linked at 9 to a shaft 10 carried by arms 11 mounted on a shaft 12 angularly disposed to the parallel shafts 6, 8, 10. A link 13 prevents boldiy movement of the head forwardly or backwardly of the machine but allows it to rise and fall and tip forwardly or rearwardly and to move laterally across the machine. The head and iron are thrust towards the shoe by means similar to the means described in Specification 309,054, operating on a lever 25 (corresponding to the lever 86 in Specification 309,054), the lever 25 being connected to the head by links 26, 28 the latter of which is coupled to the link 13 by a ball connection. The link 26 carries a roller 30 which is guided in a slot 31 in a bar 32 carried by one of the arms 11. The arm 11 is actuated by an hydraulic plunger controlled by a camoperated valve, and when so actuated to tip the head 4, the link 26 is swung upwardly about its pivotal connection to the lever 25 and raises the right-hand end of the link 28 so as to maintain the thrust through the link 28 substantially at right angles to the edge-setting face of the iron. The iron and its supporting sleeve (corresponding to the sleeve 6 in Specification 341,417) are connected to a spring 33 by a yoke 34, the spring being so tensioned that it just fails to overcome the weight of the sleeve &c. so that the sleeve can rest on a stop. This sensitive support enables the iron to conform readily to the sole edge. The upper end of the spring 33 is connected at one end to a lever 35, the other end of which is connected by a Bowden wire 36 to a bar (corresponding to 180 in Specification 309,054), the casing of the Bowden wire being connected at its upper end to the head 4 and at its lower end to the machine frame.