Patent GB-190222839-A (GB)
Title: Improvements in or relating to Machines for Compressing Heels
Inventor: BOULT ALFRED JULIUS
Filed: 1902-10-20
Granted: 1904-01-20
Abstract: 22,839. Boult, A. J., [United Shoe Machinery Co.]. Oct. 20. Presses.-Relates to machines for compressing heel blanks or to compress small masses of leather or other compressible material for use otherwise than in boots and shoes. The sliding head 2, Fig. 1, is reciprocated on the vertical guides 20 by the toggle mechanism 11, 12, actuated by the connecting-rod 10 from the crank shaft 9, which is driven by the gearing shown from the main shaft 3. The head 2 is provided with a forward extension 2<a>, and effects the movements of the feeding, clamping, compressing, and other operative parts of the machine. The heel blanks are fed in succession by the slide 60 on to the lift plate 40, Fig. 4, which is raised to compress each blank against the fixed upper die 25. During this movement of the plate 40, the blank is compressed laterally by the side dies 22, Figs. 3 and 4, and the breast plate 21. The side dies 22 are carried by slides 26, which are connected by pivoted arms 30 to pivots 32 mounted in the frame, so that, during the movements of the head 2, the dies are advanced and withdrawn at the proper times. The rods 30 are slotted to provide a lost-motion connection 33 with the pivots 32, so that the dies 22 remain stationary in the open position during the first part of the upward movement and the latter part of the downward movement of the head 2, the amount of lost motion being adjustable by means of eccentrics on the pivots 32. The separation of the dies 22 is effected by springs 37, Fig. 3, or, in case the springs fail to work, by the rods 30. The breast plate 21 is formed with bevelled faces provided with headed studs, which engage in undercut grooves in correspondingly-bevelled faces on the slides 26, so that the breast plate is actuated synchronously with the dies. The feed-slide 60 is provided with two pivoted arms 61, geared together at 61<a> and furnished with spring-controlled fingers 62, whereby the blank is clamped between the arms and the abutment 64 on the slide while it is being fed forwards on to the plate 40. One of the arms 61 is provided with a tail-piece or extension engaged between a spring-controlled bolt mounted in the socket 68, Fig. 3, and a second bolt mounted in the socket 69, the arms being opened, to release the blank before it is compressed, by the cam 75 engaging the latter bolt. The cam 75 is carried by the slide 76, which is actuated through the bellcrank lever 78, Fig. 9, by the cam 82. This cam is of slot form, and works in conjunction with a weighted double-armed switch lever 84, which deflects the bowl 81 on the lever 78 to one side or other of the cam-slot 82, according to the direction in which the head 2 is moving. The slide 60 is provided with a pivoted tail-piece 90, Fig. 4, which is provided with a bowl engaging in the forked upper end of the operating-lever 95, this lever being actuated by the spring-controlled rod 99 having a lost-motion connection 100 with the lever, and mounted in a socket 97 pivoted at 98 to the frame. The tail-piece 90 is normally secured in operative position by the locking-pin 92, but, on disengaging this pin, can be turned upwards, as shown in dotted lines in Fig. 4, to release it from the lever 95, so permitting the slide to be withdrawn. The forward movement of the slide is limited and controlled by a spring buffer on one side, and a braking-mechanism, Fig. 12, on the opposite side, of the slide. The braking-mechanism consists of a wedge-shaped plate 110 fixed to the slide and adapted to bear on the shoulder 113 of the spring-controlled plunger 111, which rises behind the plate 110 when the latter has passed over it and so locks the slide against rebound. The release of the slide is effected by the cam 75 engaging the projection 114 on the plunger and depressing the latter. The plate 40, Figs. 4 and 14, has a stem 41, which is secured in the supporting- post 42 by a stud-and-groove connection 43, somewhat similar to a bayonet joint, and is locked against rotation by the spring-controlled wedge 46. A spring-controlled pin 51 engages in a longitudinal groove in the post 42 to prevent rotation of the post while permitting it to move vertically. The post is actuated through the bell-crank lever 120 by a cam similar to the cam 82, to raise and compress the blank and also at the proper time to raise the compressed blank, relatively, above the level of the side dies, so that it can be ejected into the delivery shoot 15 by the abutments 66 on the arms 61 as the feed-slide advances with the next blank..