Patent GB-190724664-A (GB)
Title: Improvements in or relating to Machines for Performing Levelling and Pounding or similar Operations upon Boots and Shoes.
Inventor: BOULT ALFRED JULIUS
Filed: 1907-11-07
Granted: 1908-11-09
Abstract: 24,664. Boult, A. J., [United Shoe Machinery Co.]. Nov. 7. Soles.-A sole-levelling machine is provided with an improved roll particularly adapted for work on turned shoes, a mechanism under the control of the operator for changing the relative longitudinal position of the roll and the jack, an improved jack, and a brake mechanism to steady the movement of the jack. The roll is of the ribbed type shaped to the curvature of the sole. It is preferably made in one piece, Fig. 11, though it may be in two halves as shown in Fig. 8. Its surface is divided by slots 2 into ribs or projections 1, which are separated the same distance from each other throughout their length. The edges of the ribs are rounded off, while in the construction shown in Fig. 11, the inner ends of the slots narrow slightly and merge into the smooth surface of the roll. In the form shown in Fig. 8, the slots extend right across the roll, the two halves of which are connected by joints arranged alternately on opposite sides of the centre line. The roll is preferably rotated in the direction of the arrow, Fig. 11. The roll is mounted in the front end of a pivoted counterbalanced frame 3, and is driven by belting from a main shaft 8. The roll is forced against the shoe on the depression of a treadle 12, which is connected to the frame 3 by rods 13, 14 and a spring 15. The jack consists of toe and heel supports 21, 20 carried by a frame 17, which is mounted in a second frame 18 pivoted at 19 to the machine frame. The toe rest comprises a shaped block angularly adjustable by means of a tongue and curved groove 22, Fig. 7 ; it may also be moved towards and away from the heel support by sliding it along a wedge-shaped lever 25. This lever is pivoted at its rear end upon the frame 17, and rests at its forward end on a rod 27, Fig. 7, which can be raised or lowered by bevel-gears actuated by a hand-wheel 32. The jack is moved backwards and forwards by power-driven mechanism under the control of the operator, and is rocked manually by means of the frame 17 or a bar connected to it. The power-driven mechanism comprises two friction disks adapted in turn to engage an intermediate leather-covered disk 36, Fig. 1, which is mounted on the shaft of a pinion 47 in gear with a wheel 48 on a crank-shaft 49. A crankpin connects this shaft to the jack. The friction disks and their driving-pulleys 42, 43, 44, 45 are mounted in a frame 46, which can be moved by means of a hand-lever 52 to reverse the movement of the jack at any desired time. To guard against overthrow of the jack-supporting frame, and to throw it out of action when it reaches either end of its travel, the gear-wheel 48 carries two pins 55, 56 adapted to engage an arm projecting from a sleeve loosely mounted on a rod 53 to which the handlever 52 is secured. This sleeve is connected by an adjustable device, comprising links 59, 60 and springs 61, to the frame 46. A brake shoe 63, carried by a pivoted lever 65, is pressed against a disk 64 on the crank-shaft 49 by an adjustable spring 65 surrounding a rod 67. This serves to make the movements of the jack steady and even ; while, by providing raised surfaces on the periphery of the disk 64, the braking device may be utilized to assist in stopping the jack when the frictiondriving mechanism is thrown out of operation. An adjustable spring device may be provided for bringing the frame 46 into neutral position when the hand-lever 52 is released.