Patent GB-190629629-A (GB)
Title: Improvements in Lasting Machines for Boots and Shoes.
Inventor: PERLEY RICHMOND GLASS
Filed: 1906-12-29
Abstract: 29,629. Glass, P.R. Dec. 30, 1905, [date applied for under Patents Act, 1901]. Void. [Published under Patents &c. Act, 1907.] Lasting.-Relates to wiping-over machines. The lasting-devices are carried by toe and heel heads B, C, Fig. 2, mounted on a frame A, the former consisting of an horizontallyfixed but verticallymovable rest b, in which a toe carriage is slidably mounted, while the latter, in addition to a heel carriage, is also provided with means for supporting the shoe. Both carriages are provided with pairs of wiper plates d, the front ends of which are split to receive the readilyremovable wiper jaws d'. The wipers are connected for forward movement by an underlying link d' and sliding guideblock d8 to a handlever d<9>, and, as they move forwards, a pin-andslot arrangement causes the jaws to undergo a combined swinging and sliding movement on the work. Catches are provided to lock the wipers temporarily in any position into which they may be moved. Both sets of wipers are provided with means for adjusting them to different inclinations of the last, both lengthways and transversely. Each set of wipers is mounted on trunnions g<1>, about which they can be swung for endways adjustment by means of segmental gearing g<2>, g<3>, actuated by a hand wheel g<4>. To give the transverse adjustment, each main carriage body is provided with ourved portions g<5> adapted to slide in guides in the carriage base, the movement being effected by a link g<7> and segmental bevel-gearing g<8>, from an inclined shaft g<10>, which is provided with a hand-wheel. Spring-controlled friction washers are provided on this shaft to prevent accidental displacement of the carriage body from its adjusted position. The toe carriage is provided with a toe post i, which carries a pivoted padded rest i<2> normally held upright by a spring- pressed pin i<4>. The lower end of the post is adjustably clamped to a sliding wedge-shaped piece i<6>, which is loosely supported on a swinging plate i<7> pivotei to the machine frame. The vertical movement of the rest b, referred to above, is provided to permit relative movement between the wiper jaws and the jacked shoe ; this movement is required just prior to actuating the toe wipers. The rest is mounted on rods j connected to a crosshead j<3>, to which is secured an actuating-rod j<4>. This is provided with a double-faced rack meshing. with toothed segments, one of which is fast on a treadle shaft ; the other has secured to it a second treadle shaft which, when actuated, brings additional pressure to force the wipers down on to the insole. Springs are provided to counterbalance a portion of the weight (f the toe head, while a brace j<14> assists in supporting the outer end of the rest b. The heel carriage is mounted on a pair of rollers h<1>, which run in grooves on an extension A' of the machine frame. The jack post has a pin k pivoted to a forked stud k<2>, which is threaded in a vertically-slidable but non-swinging sleeve k<3> mounted in a support k<4>. A spring-pressed pin k<5> normally holds the pin k in an upright position. Within the sleeve k<3> is a non-rotatable rod k<6>, which carries a roller k<7> to run on an adjustable wedge-shaped guide-shoe k<8>. The support k<4> is attached to a slide k<12>, which can be retracted against the action of springs k<13> by a set of links actuated by a handwheel. When this is rotated, the roller k<7> rides along the shoe k<8> and causes the jack post to move upwards and backwards, to seat the shoe counter against the heel band. A pawl and-ratchet device locks the hand-wheel in the position into which it is turned, but is automatically released on the return movement of the heel carriage from the lasting position. The heel carriage is positioned and locked in its forward position by the engagement of spring-controlled latches on the carriage with corresponding latches secured to the frame bed. One of the latches is provided with a hand-lever by means of which the latches may be released manually at any desired time. In order to exert additional pressure of the last against the wipers, a spring - governed lifting- rod k<30> controlled by a treadle is provided. When the heel carriage is in its forward position, the top of this rod is in alinement with an overhanging part of the post rod k<6>, so that, on the depression of the treadle, the shoe k<8> is forced up against the wiper jaws. The heel band consists of a pad m of leather, Fig. 2, secured to a chain m<1>, and stiffened at its edges by strips. The chain is connected by an adjustable series of links to ahead m'‹ on a rod m<11>, which is slidably mounted in the wiper-carrying plate. The head m<10> is normally held retracted with the pad open by a spring m<12>. For the purpose of tightening the heel band, the underside of the head m<10> is engaged by a swinging toothed lever n, Fig. 2, which is forced forwards to close the pad by a pin n<1>, actuated by a finger n<2>. The latter is provided with a depending arm n', Fig. 11, from both sides of which project a pin n<5>. The outer end of this pin is secured to a spring n<6>, while its inner end works in a slot in a rod n<7>. The latter is arranged so that when the heel carriage is moved into the lasting position, the rod lies adjacent to an actuating-lever n<9>, which is jointed to a spring-controlled sliding link n<10>. The link is slotted to receive a guide-roller nil, and is provided with a cam-roller n<13>, which engages a slide cam o, Fig. 2, keyed to a rotary sleeve o<1> on a stationary shaft o<2>. This sleeve also has secured to it a cam o<3>, which engages a roller depending from a lug on the swinging shelf i<7>, whereby the toe pad is raised at the proper time into supporting contact with the shoe. To effect the movement of the sleeve o', a ratchet-wheel o<5> is keyed to it, and has the same number of teeth, say six, as there are elevations and depressions in the cams o, o<3>. The wheel is engaged by a spring-pressed pawl o<6> on a disk o<7>, which is connected to an actuating-rod operated from a countershaft. The latter carries a continuously-rotating driving-pulley, which is clutched to the shaft at suitable intervals by a mechanism operated by a knee-lever. Stops are provided to stop the cam sleeve positively as soon as the clutch is released ; while to prevent the momentum of the sleeve from carrying it beyond the position to which it is moved by the pawl-andratchet device, a brake wheel p<12> is provided. The release of the heel carriage is effected independently of the action of the cam shaft by a rod, connected to a separate knee-lever and provided with a roller which unhooks the latches that lock the carriage in its forward position. The knee-lever is caused to overhang the knee-lever for actuating the clutch mechanism, so that, when the heel carriage is released, the heel band is simultaneously unclamped, and the toe post dropped. The carriage is returned automatically, when released, by the action of the spring n<6>. A hold-down s is provided to engage the insole of the shoe during lasting ; this is spring- controlled, and is lowered by depression of a treadle, which is locked, when depressed, by a pawl and ratchet. A foot-piece is provided near the treadle so that the ratchet can be quickly released. The ratchet may, however, be connected up to the rod controlling the release of the heel carriage, so that the hold-down is released automatically.