Patent GB-190620216-A (GB)
Title: Improvements in Machines for Trimming and otherwise Operating upon the Soles of Boots and Shoes.
Inventor: JUSTICE PHILIP MIDDLETON
Filed: 1906-09-11
Granted: 1907-11-11
Abstract: 20,216. Justice, P. M., [Manufacturers' Machine Co.]. Sept. 11. Channelling; p a r i n g. - In machines for trimming and channelling the soles of boots and shoes, a single guide is provided which acts along the inseam and is adjusted, to compensate for irregularities in the inseam, by means of a feeler in contact with the upper; means for producing, w h e n desired, the "Scotch" or "Baltimore" extension edges is combined with the inseam guide. The edge of the sole is inserted between an inseam guide 1 and a spring- actuated clamp 2, so as to be held in the path of a trimming-knife 3 and against a channelling-knife 4. Pressed against the inseam guide 1 is a feeler 6 mounted at one end of a rocking lever 7, which is pivoted on a fixed arm 14. The inseam guide is secured to a long lever 10 pivoted at the rear to a sleeve, and is adjusted vertically by pressing a wedge 13 between the arm 14 and lever 10. This wedge 13 is adjusted by a pair of grippers 17, which form the longer arm of a bell-crank lever pivoted on a pin 18. The shorter arm is connected by a rod 26 to one end of the lever 7. When an irregularity in the inseam occurs, the feeler 6 is displaced, and the grippers 17 are moved along the wedge 13, when a cam 24 presses against a spring arm 22, thus causing the grippers to grasp the wedge ; on further rotation of the cam, side faces on the cam pass between rollers 25 and rock the grippers 17 into their central position, with the result that the inseam guide is adjusted to meet the irregularity. The trimming-knife 3 is attached to a knife.slide 29, Fig. 5, pivoted to a block 29<a> adapted to slide in a guide 32 in a knife-carrier 30, which is pivoted to the same pin as the inseam guide-lever 10. The trimming stroke of the knife is effected by means of a lever operated by a cam on the driving-shaft. The clamp or presser 2 is carried by a swinging arm 40, pivoted on a lug 42 extending upwardly from the knife-carrier 30, and is prolonged to form an operating-handle 43. Normally, the presser is held against the work by a spring, but after each feeding movement, it is released by a cam and lever to allow of the return movement. The inseam guide-arm 10, the presser 2, and the trimming-knife 3 are all fed laterally, to feed the work for successive trimming operations, by a system of cams and levers operated from the main shaft ; during the feeding, the channelling is effected by means of a fixed channelling-knife 4. At the end of each feeding operation, the knife slide is prevented from returning with the knifecarrier by means of a dog 63, which engages a stop at the side of the carrier. After the return movement, the inseam guide and presser again grip the work, and the knife is withdrawn and returned laterally into position for another trimming operation. To form the "Scotch" or "Baltimore" edge, the knife is moved vertically with respect to the inseam guide 1. This is effected by the movement of a wedge 74, Fig. 15, situated between the koife-carrier 30 and a cam-roll 71. For actuating the wedge, an arm 75, Fig. 3, is provided with a foot 77 engaged by a V-shaped rib 78 carried on the upper end of an horizontally pivoted plate 79. A roller stud 81 on this plate engages a pattern 82 with two surfaces, one for right and one for left shoes, adapted to rotate on a shaft 83. The pattern is rotated by a spring clutch 87 on the shaft 83, Fig. 7, and the speed of the rotation is adjusted by means of a lever 103, Fig. 3, which moves a wedge 98 along a cam-actuated lever 92. To allow for different sizes of shoes, the contact-rib 78 is connected with the rack 101, so that movement of the rack adjusts the rib along the foot 77. To stop the pattern 82 at the end of each rounding operation, a sleeve 86, to which the pattern is connected, is formed with projections engaging a spring plate 123, which carries a yoke 124 adapted to keep the clutch mechanism in contact with the knife-edge bearing 98. On rotation of the pattern, the spring 123 is forced outward by the projections, and the clutch is rendered inoperative. To start the pattern again, a lever 125 is rocked forwardly by a treadle ; this causes a dog to engage a pin on the pattern, and to move the pattern sufficiently to disengage the spring 123 from the projection. To permit of elevation of the channel knife relatively to the line of cut, the block 5 is connected by a sliding block 146 to a T-shaped lever 144 pivoted at 135 to the trimming-knife carrier and connected by a link 148 to the arm 125. The treadle mechanism employed is shown in Fig. 19. A treadle arm 156 is provided with a treadle plate 159, and is forked to embrace an auxiliary treadle 170 pivoted on a pin 162. To the same pin is attached a rod 171 connected to a starting-clutch. By pressing on the plate 159 with the heel, a stop 161 depresses the treadle 156 and starts the machine. When the fore part of the shoe is reached, the toe end of the treadle plate 159 is depressed, and consequently the rod 128 is elevated and the pattern put into operation. Specification No. 4426, A.D. 1898, is referred to.