Patent GB-670056-A (GB)
Title: Improvements in or relating to machines for preparing or composing record-strips forcontrolling the operations of individual type-casting and composing machines and photo-mechanical typographic composing machines
Inventor: BOOTH JOSEPH BOURD AS SMITH
IPC: B41B25/00
Filed: 1949-10-26
Abstract: 670,056. Type making - machines. MONOTYPE CORPORATION, Ltd. Oct. 26, 1949, No. 27461/49. Class 100 (iii). Strip-perforating machines; justifying type.- In a record-strip preparing machine having keyactuated punches and a line-measuring mechanism including a units wheel controlled by the keys, there is provided a supplementary measuring mechanism comprising a variable or graduated gauge selectively positioned by predetermined keys and co-operating with a stop and with the units wheel to impart additional movement to the line-measuring mechanism, in cases where a desired character is accommodated in the casting machine among characters of a different unit value. The holding pawl B, Fig. 2, is normally held in stop position by a spring B<SP>5</SP>, and the units wheel A is locked by its teeth engaging teeth B<SP>1</SP> in a block B<SP>2</SP> radially slidable in an arm G3 of a frame G rotatable on the wheel spindle a<SP>1</SP>, the block B<SP>2</SP> being also circumferentially slidable on the cam of the pawl B and resting against a stop B<SP>4</SP> under the action of the power-driven rack of the wheel A. When a character or like key is depressed, the units rack E moves into engagement with the wheel and the spring B<SP>5</SP> is released to release the pawl, the block B<SP>2</SP> moves out of engagement with the wheel under the influence of a spring B<SP>3</SP>, whereupon the powerdriven rack rotates the wheel A anticlockwise until the rack E engages the actuated units stop F, thereby moving the line-measuring rack C to register the width allotted to the character against an indicator c on a fixed scale D. The frame G is rotated clockwise by a spring K until a step H<SP>1</SP> on a stop latch H engages a step on a gauge piece 1. When the key is released, the teeth B' engage the wheel, the rack E is disengaged from the wheel, and the power-driven rack rotates the wheel an additional amount, according to the amount the frame G has been rotated, until the block B<SP>2</SP> again engages the stop B<SP>4</SP>, thus registering an additional one, two or three units on the rack C. The amount of rotation of the frame G is controlled by the selective setting in the path of the latch H of one of three steps I<SP>1</SP>, I<SP>2</SP> or I<SP>3</SP> on the gauge piece I, Fig. 3. The setting of the gauge I is controlled through a lever J' by a piston J'in a cylinder J<SP>1</SP>. The cylinder J<SP>1</SP> contains three pistons J, J<SP>2</SP>, J<SP>4</SP> actuated by air admitted through three ports j, j<SP>1</SP>, j<SP>2</SP> through valves controlled by the character key, if this key represents a character having a greater width than that of the group to which it is allotted in the casting machine. Otherwise the gauge I remains in its normal positon. For measuring one additional unit, the port j is utilised, and the piston J actuates the piston J<SP>4</SP> through the piston J<SP>2</SP>, the movement being limited by a pin J" in the cylinder wall engaging the rear end of a slot J<SP>3</SP> in the piston J. For measuring two units, the port j' is utilised, and the piston J<SP>2</SP> actuates the piston J<SP>4</SP>, the movement being limited by a pin J<SP>5</SP> and slot J<SP>6</SP>. For measuring three units, the port j<SP>2</SP> is utilised to actuate the piston J' over its full stroke. There is a clearance equivalent to one unit between the latch H and gauge I in its normal position, so that the frame G is then rotated one unit, the stops F being set one unit to the left to compensate for this. If it is required to add two units to successive characters for a word or words to space them out, a turn button H<SP>8</SP> is actuated to depress a lever H', a cam surface H<SP>7</SP> of which moves to the left a slidable bearing H<SP>4</SP> of the latch H, whereby a second stop H' thereon is brought into position to engage the gauge I. Specifications 17199/08, [Class 100], and 30036/10, [Class 100(iii)], are referred to.