Patent GB-190917808-A (GB)
Title: Improvements in or relating to Machines for Evening and Grading Soles and other Parts of Boots and Shoes and for other allied uses.
Inventor: BOULT ALFRED JULIUS
IPC: A43D8/34
Filed: 1909-07-31
Granted: 1910-07-28
Abstract: 17,808. Boult, A. J., [United Shoe Machinery Co.]. July 31. Printing-apparatus for boot and shoe making.- Relates to machines of the type described in Specification 1956/04, for grading and evening the soles, taps, counters, &c. of boots and shoes, and for stamping the grade upon them. The stock is fed between rollers 8, 9, the lower of which is supported by s p r i n g s 33 encircling posts 25, Fig. 5, secured at their lower ends to the ends of a lever 30 pivoted at 31. The lower roller 9 acts as a " feeler " to detect the thinnest portion of the stock, and the pressure of the roller on both edges of the stock is equalized by the springs 33 and lever 30. Upward movements of either end of the roller 9 are transmitted through a lever 21 pivoted at 23 and terminating in a toothed-sector 43, sectors 44, 48 on a shaft 45, rack 49, 50, and pinions 51, 53 on a shaft 52, to a rack 55 supporting two stepped stops 67, each stop being a "half-iron" or one ninety-sixth of an inch, in height. Lost motion is prevented by a spring 71, and by a dash-pot. The stock passes from the " feeler" rollers to rollers 70, 74 immediately in front of the splitting- kuife. The lower roller 74 is fixed, and the roller 70 is adapted to be raised by the passing s t o c k against the action of springs 78. The bearings of the rollers 70 are provided with stepped stops 68, which engage with the stops 67 and secure the splitting of the leather to the nearest " h a l f - i r o n " of the thinnest portion of the stock. The grade of the stock is set up on a marking-wheel 61 through the action of the rack 55, link 57, sector 58, and pinion 59. The posts 25 are laterally adjustable so that the springs 33 can be positioned beneath the edges of the stock passing between the rollers 8, 9. The marking-wheel 61 is mounted in a frame which is normally raised by a cam on the shaft of a pinion 91, Fig. 4, but is adapted to be suddenly drawn down by springs 64 to mark the stock. To provide for a minimum thickness of the stock, an adjustable stop is provided to limit the rearward movement of the rack 49, a spring connexio 249 allowiog lost motion between the sector 43 and shaft 45. The action of the marking device is independent of that of the feeling-mechanism and is caused by the passage of the stock betwe-n the rollers 70, 74. The upward movement of the roller 70 is transmitted through a rod 121, Fig. 4, lever 118, link 117, dog 115, and catch 107, to rock a cam-plate 100 to allow a spring- operated clutch to transmit rotation through pinions 97, 93, 92, and 91 to release the frame of the marking-device. The latter is re-set by a cam after one revolution of the pinion 91, a pin 112 on which rocks a lever 111 to release the catch 107 and throw the clutch out of gear. As the stock passes the feeler, it engages an adjustable shoe 148, or a cam close to tho feeler, which causes a pawl 140, Fig. 5, to engage ratchet-teeth 134 on a wheel 135 to prevent the shaft 45 from turning except to correspond to successive increments of thinness of the stock. When the stock has passed the gate, this falls, and a link 130, Fig. 5, attached to it rocks a pawl 131 into engagement with ratchetteeth 139 on the wheel 135. The stops 67 are thus locked until the stock has been evened.