Patent GB-462685-A (GB)
Title: Improvements in or relating to machines for trimming or cutting out workpieces
IPC: A43D27/00
Filed: 1935-09-13
Abstract: 462,685. Trimming boot soles and other workpieces. BRITISH UNITED SHOE MACHINERY CO., Ltd., ELLIOTT, H. E., and BRAY, W. N. Sept. 13, 1935, No. 25410. Addition to 421,177. [Class 31 (i)] Relates to machines for trimming or cutting out workpieces, such as boot or shoe soles, of the kind described in Specification 1070/08, [Class 17], and comprises an improvement in or modification of the machine described in the parent Specification. According to the invention, (a) both hands are required to start the machine by operating two levers arranged at about the same height above the work table preferably on an overhanging portion of the machine frame, the machine still running if one of the levers is released, but stopping at any time if the other is released, and (b) the driving shaft is mounted in the overhanging portion of the machine frame and extends forwardly and rearwardly thereof. The machine shown is provided on an overhanging portion 66, Fig. 1, with a coritrolling lever 97 and a starting lever 77 which operates through means including a rod 63, a bell-crank lever 59, a rod 57 and a lever 53 to release a brake 47 and engage a clutch 15 by wedge means 19, 21 to drive the shaft 5, the machine over-running its initial position and returning thereto, all as described in Specification 253,201, [Class 31 (i)]. The rod 63 is jointed to a lever 67, Fig. 4, secured on a shaft 69 which has fixed to it also an arm 71 provided with a block 73 to co-operate with a notched pin 79 on the starting lever 77 which is loosely mounted on the shaft 69. A spring-controlled lever 83 secured to the pin 79 is provided with a block 85 which co-operates with a lug 84 on a bar 87 operable by the lever 97 through an arm 91. Operation of the lever 97 by gripping it against a fixed projection 99 thus rocks the lever 83 to turn the pin 79 so that subsequent operation of the lever 77 rocks the arms 71 and 67 to start the machine ; the lever 77 is held in its right hand position by a spring-urged pivoted pawl 121 engaging a projection 131, an arm 125 of the lever 83 having been moved away from its tail. Subsequent release of the lever 77 does not affect the machine, but release of the lever 97 at any time stops it by allowing the pin 79 to turn. The machine is automatically stopped at the end of a cycle by the rocking of a bell-crank lever 171 so that a pin 177 thereon lifts the bar 87 to disengage the lug 84 from the lever 83. Movement of the lever 171 is effected by a cam 141, Fig. 3, on the work table 11 engaging a projection 143 on a bell-crank lever 145 to rock the latter clockwise and operate a link 151, lever arms 155, 165 and a rod 167 coupled to the lever 171. The table 11 can be turned manually by a handle 12, clutch 10, 6 and sprockets 14, 18 when the wedge 19 is held in inoperative position by a cam device. Two tables 187, 189 are provided adjacent the table 11 to support the work after and prior to operation thereon. The table 189 is level with and the table 187 lower than the table 11 ; turned-up edges 193, 197 are provided on the tables including a tool compartment 195. A fixed guard ring 191 is provided for the table 11. The work clamp 139 may be operated by the treadle means described in Specification 441,273.