Patent GB-190328661-A (GB)
Title: Improvements in or relating to Pressing Stamping or like Machines.
Inventor: BOULT ALFRED JULIUS
Filed: 1903-12-30
Granted: 1904-12-30
Abstract: 28,661. Boult, A. J., [United Shoe Machinery Co.]. Dec. 30. Stamping.-Relates to stamping, pressing, and like machines, and particularly to machines for stamping monograms, trade marks, price marks, or other marks or designs upon the bottoms of boots and shoes. A stamping-machine in which the die acts by continued pressure is shown in side elevation in Fig. 1. Dies 10 are carried by a turret 8, which is supported by a plunger 6 mounted in an over. hanging arm 4, and is locked in adjusted position by means of a spring-pressed pin 14 and recesses 12. The plunger 6 is actuated by means of an elbow-lever 22 and cams 104, 109 on a shaft geared to a driving-shaft 126, and the arrangement is such that the die has a slow down-stroke and a quick up-stroke. The work-support comprises a bent horn 40 and a straight horn 41 for alternative use, and is sustained so that the machine automatically adapts itself to the thickness of the work, for obtaining a predetermined pressure. The horn 40 is swivelled in an arm 42 on a spindle 44. The horn 41 is hinged to a base-piece 43 adapted to fit over a stud 45 on the spindle 44. The spindle 44, Figs. 1 and 3, is guided at the upper end by an arm 46, and is provided at the lower end with a piston-head 60 and packing 64 fitting in a cylinder 50 containing liquid, preferably oil. The spindle is returned by a spring 54. The normal elevation is determined by a stop rod or bolt 55, which passes through a lug on the arm 46 and is adjustable in the arm 42. The cylinder 50 communicates through a channel 70, Fig. 4, with a relief valve, which comprises a plate 78 held against a sleeve 74 in the throat of a chamber 76, by means of a spring- projected head 80 on an adjustable valve-rod 82. The chamber 76 communicates with a supply tank 79, and with the cylinder 50 through a valve 94, a well 92, and an inlet channel 90. The cylinder 50 is provided with an annular groove 51 for the escape of leakage through a channel 53 into the tank 79. The driving-pulley of the main shaft 126 is provided with a clutch shown in Fig. 6. The loose clutch member comprises a steel ring 140, and the fast member comprises a keyed sleeve having a reduced portion 144 extending into the loose member. Between the members are arranged rolls 148 movable in wedge recesses formed by cam faces 168 on the part 144, the movement being effected by means of segmental lugs 150 on a loose sleeve 152 connected to the fast member by springs tending to turn the sleeve. In order to stop the machine after a complete operation, a spring- depressed stop lever 180 co-operates with a shoulder 172 on the sleeve 152. The lever 180 is provided with a lug 184 for engagement by a hooked rod 186 connected with a treadle 188, and is fitted with a yoke spring 190 for reducing jar. The rod 186 is guided through a controlling-lever 192 co-operating with an edge cam 198, so that, immediately after starting the machine, the rod 186 is held free from the lever 180 and retained until a complete operation is effected. The main shaft makes three revolutions for the complete operation, and the lever 180 is held out of the path of the shoulder 172 during the first and second revolutions by means of an arm 202 and a cam 206. In some cases it is desirable to allow a longer dwell of the die, and for this purpose the cam 206 is made in two adjustable parts, so that the lever 180 can be held up for either one or two revolutions; in the former case, the machine is stopped with the die in the pressure position. The work-support may be connected with an actuating-lever and the die with the fluid-containing cylinder ; or the fluidcontaining cylinder may be interposed between the actuating-mechanism and the die or the worksupport.