Patent GB-190928922-A (GB)
Title: Improvements in or relating to Machines for Rounding or Channelling or for Performing other Operations upon the Soles of Boots and Shoes.
Inventor: PERRY FREDERICK HENRY
IPC: A43D43/02
Filed: 1909-12-10
Granted: 1910-12-12
Abstract: 28,922. Perry, F. H. Dec. 11, 1908, [Convention date]. Trimming etc.; channelling.-In machines for operating upon the soles of boots &c. having means for relatively actuating a gauge and a tool in accordance with varying styles and sizes, the means for actuating that gauge comprises a series of cams arranged side bv side on a common axis, with provision for bring- ing any cam into operation and rotating it forwardly or backwardly so that it can operate on a right or left shoe. The invention is described as applied to a sole rounding and channelling machine having a trimming-knife 1, a work-support 2 which also acts as a creaseguide, a sole-support 3, a channel-knife 4, a feed-plate 5 which also acts as a cutting-block, and a fore-part guide 6 carried on the front end of a lever 7, arranged and operated as described in Specification 4426/98. The lever 7, carrying the forepart gauge 6, is thrown into operation when the ball line is reached by depressing a treadle. A roll 15 on the upper end of the lever 7 is thus held in engagement with one of a series of cams 10 arranged in fixed relation to each other upon an arbor 11. Each cam corresponds to a different style of sole; and the arbor may be readily exchanged for another carrying a different set of cams. The roll 15 may be adjusted in position upon its axis 16 to engage with any one of the cams 10, the upper end of the lever having guides 19 to receive a scale-plate indicating the character of each cam. The cams are intermittently advanced during the operation of the machine, and, to ensure uniformity between right and left boots, the actuating means is constructed to drive the cams in opposite directions for the right or left boots, the same cam being used for each. The cam arbor is held at rest by a friction brake, but is driven forward or backward through a friction clutch 26 and a bevelwheel 27 in gear with two oppositely-arranged wheels 33, 34 adapted to drive it in opposite directions. Each of these is driven by a separate set of pawls 35, 36, both of which are carried by an oscillating yoke 38, which is actuated from the feed-slide 45 at each stroke. Each set of pawls is controlled by a separate latching-lever 41, 42, a pin 71 slidably arranged between these levers preventing both sets of pawls from being in operation at the same time. Each latching lever, when holding its associated pawls out of operation, is retained by a latch 43 or 44. The feed-slide 45 carries an adjustable stud 47 in a bracket 48 fixed to the feed-slide. An arm 51 working in an oblique slot 52 graduated with size markings in the bracket 48 controls this stud. It co-operates with an adjustable abutment 46 in the depending membeof the oscillating spoke 38 to drive the pawls 35, 36 forward at the end of each feed stroke. The function of the arm 51 and slot 52 is to vary the stroke of these pawls, and hence the rate of advance of the cams 10, to correspond with the size of the boot. When the treadle is depressed to throw the forepart gauge into operation, both sets of pawls 35, 36 are held out of action by their latching-devices. The following mechanism is employed to throw the correct set of pawls into engagement to actuate the pattern cams. A slide-bar 59 with cam-surfaces lies in a central position beneath the latches 43, 44. A knee lever 62 is moved to right or left to shift the bar 59 to one side or the other. This movement frees one latching-lever, and the associated set of pawls falls into engagement with its ratchet-wheel. The disengagement of the driving-pawls 35 or 36 is automatically effected by the withdrawal of the forepart gauge from the boot on the release of the treadle. The frame 7 carries a projection 83, which engages a latch 82 on a lever 79 as it returns to its initial position. When moving into the operative position, the projection passes over the latch 82 ineffectively. The lever 79 is pivoted on a projection 45<1> from the reciprocating feed-slide. A latch 84 engages this lever after it has been actuated, and holds it in the path of a projection 78 on a link 75. This link is connected to a rod-shaft 72, with a flat side, arranged against the latching-levers 41, 42. A spring 77 normally holds this rock-shaft inoperative, so that the latching-levers are permitted to free their pawls under the action of the knee lever referred to. As the feed-slide completes its final return stroke, the lever 79 meeting the projection 78 turns the rock-shaft 72. The free latching-lever is then actuated, and the operative pawls are thrown out of action. The corresponding latch holds the latching-lever. A cam 86, Fig. 8, on the periphery of the main cam operating the feed-slide subsequently turns the latch 84, whereupon the lever 79 and the shaft 72 return to their original positions. Two stop pins 88, 89 upon a disk 90, keyed to the shaft 23 which drives the cams, co-operate with a fixed lug or sleeve 91 to determine the extent of movement of the cams 10 in either direction. Preferably, the stops 88, 89 are adjustable so that the amount of operative periphery or the operative part of the pattern cam may be varied. Thus the same cam may be used for different styles. Means are provided to correct periodically the relation between the extent of movement of the cams and the travel of the tool relatively to the work. A series of timing stop-pins 95, adjustably secured to the disk 90, co-operate with a fixed stop 94 to interrupt the advance of the cams. These stop-pins are set according to the style of shoe to be operated on, and in accordance with the points at which the correction is desired to be effected. For example, if three stops are used, these may be set to stop the travel of the cams at points corresponding to the cap line on side of the toe, the point of the toe and the cap line on the other side of the toe. The pins are removable. An index is formed upon the disk 90 to assist in setting the pins. The fixed stop 94 is a pivoted finger mounted between the lug 96 on the end of a rock-shaft 97, and the arrangement is such as to stop the pins 95 when travelling in either direction with their centres midway between the lugs 96. To re-start the cam, the shaft 97 is turned once in a direction such as to free the stop 95, by operating the slide 59, which is geared to the rock - shaft 97, by means of the knee lever. In operation, with the stop pins adjusted as above, the advance of the cam is arrested if the point in the cam corresponding to the cap line is reached before the operating-knives reach this point on the sole of the boot. When the slide has been trimmed to the cap line, the knee lever is shifted to free the cam if it has been stopped. If the boot has been fed forward in proper time with the advance of the cam, the movement of the cam is not interrupted. In the same way, the cam and boot may be brought into proper relation at the point of the toe and on the opposite side of the sole.