GB191315844A - Improvements in or relating to Perforating and other Key-operated Machines. - Google Patents

Abstract

15,844. Lanston Monotype Corporation, Ltd., [Lanston Monotype Machine Co.]. July 9. Driving-mechanism.-Relates to actuating-mechanism for key-controlled machines, particularly machines for perforating record strips for automatic type composing and casting machines. The apparatus is described as applied to the perforating- machine described in Specification 17,199/08 in which the punches are represented by controlling- valves 1, Fig. 2, which are actuated by bars 2 and transmitting-members 4 from key-bars 3 operated by the keys. According to the invention, the keybars are operated by a reciprocating plate or driver 6 actuated by a motor 10, the selected key-bars being connected with the driver by interponents released by the keys. The motor mechanism is in duplicate to correspond with the two separatelyremovable sections of the key-bank. Each motor has opposed cylinders 11, 12, the pistons of which are connected together and to the driver 6. Compressed air is admitted to the cylinders alternately by a valve operated by a lever 27, Fig. 10, of which one arm projects between two actuators 28, 29 which are connected by a spring 30 and are normally held retracted by latches 31, 32. If the latches are released in succession, the motor and the driver will make one oomplete reciprocation, the actuators being re-engaged with their latches by a projection on the driver. The latch 32 is tripped, in order to start the motor, by a projection on a slide 35 which is actuated by the interponents when these are released by depression of the keys. The first or operative stroke of the driver shifts a valve and causes an auxiliary motor to operate a slide 38 which trips the latch 31 and causes the driver to make its return stroke. Means operated by a hand-lever is provided for causing the latch 32 to remain permanently out of engagement so that the motor becomes continuously-acting, thus enabling a signal to be repeated. The keys are arranged in parallel columns contained in separate frames composed of side-plates 60, Fig. 13, separated by cross-plates 62. Each key is in the form of a bell-crank lever having at its lower end a projection or tooth 66 from which an interponent 75 is normally suspended by means of a shoulder 79. When a key is depressed, the interponent is released and is pulled down by a spriug 77 so that its lower end rests between a projection 8 on the driver and a lug 5 on the corresponding key-bar 3. A shoulder 80 on the interponent rocks one of a series of bails 87 which causes the slide 35 to trip the latch 32 and start the motor. The interponent is afterwards raised by the bail 87 and is re-engaged with the key-lever. If the key-lever has not already returned, the interponent is temporarily supported by engagement with a lug on the cross-plate. Specification 2950/05 is referred to.