Patent GB-190706273-A (GB)
Title: Improvements in the Quadding Apparatus of Linotype Machines.
Inventor: LOCK WILLIAM HENRY
Filed: 1907-03-15
Granted: 1908-04-15
Abstract: 6273. Look, W. H., Woodroffe, C. S., Pearce, H., and Billington, J. E. March 15. Linotype and like machines.-Relates to quadding- apparatus for dealing with lines of short measure without inserting quads to make e up the full measure, reference being made to Specifications No. 14,582, A.D. 1890, and No. 16,255, A.D. 1898. (1) In the line - shifter mechanism, the left hand finger 7, Fig. 1, is held at the fullmeasure distance from the right-hand finger 8 by a detent controlled by the assembler elevator 2, so that the finger 7 closes up against the end of a short line before the line is clear of the resistant 5. The finger 7 is normally retained by a stop 21 on a rod 22 adjusted in a socket 23 on a sliding bar 25, which is raised by a spring 27 but is normally held down by engagement of a lug 29 on the elevator. 2 against a lug 28 on the bar. In another arrangement, the finger 7 is normally retained either by a pin on a bell-crank lever depressed by a spring and raised by means of a. shoulder on. the elevator, or by one arm of a beil-crank lever raised by a spring and depressed by means of cam-surfaces on the lever and elevator. In the case of a very short line, the end. of the line may be clear of the resistant 5 before the finger 7 engages it, and in order to prevent the line from falling over in such a case, the finger 7 is provided with a flamboyant spring bar 42, or a spring bar 43 bent backwards and passed through the top of the finger. (2) In the vice-jaw mechanism, automatic means is provided for locking the quadding-jaw against the advancing a c t i o n of a weight and is adapted to be set, when required, for release by the first elevator near the end of its descent, the parts being arranged for return of the weight and jaw by the elevator during its ascent; and automatic means is provided for locking the jaw against backward movement during justification, the parts being inoperative until rendered operative by the first elevator at the end of its descent. In the form shown in Figs. 6 and 8, the jaw 17 is locked against the action of a weight 48 by means of a rack 44 on the jaw, or on a bar 45 fast to the jaw, and a spring pawl 46 on the vice frame 12. The pawl 46 supports a push-pin 58 disposed so that it can be depressed by a retractile projection on the elevator 11, in the form of a spring bolt 57 sliding in 'a socket 59 and normally held retracted by means of a bayonet-joint. The weight 48 is connected to the jaw 17 by an endless cord 49 and is guided on the vice frame 12 by lugs 54 engaging in a groove 55. The cord.49 passes over pulleys 50, 51, 52 on the vice top 15 and a pulley on the vice frame 12, and is tensioned by a spring 56. The weight is raised by means of an adjustable abutment 76 on an arm 75 on the elevator 11. Fig. 12 shows automatic means for retracting the bolt 57. A gravity latch 84 provided with a finger-piece 86 engages behind a pin 61 on the bolt 57, and the bolt is retracted and engaged with the latch by means of a spring- retained bell-crank lever 87 pivoted on a block 89 and operated by a fixed part 1 of the framing. When a number of successive lines are to be quadded,the latch 84 is turned out of operative position, as shown in dotted lines. In another arrangement, the pawl is connected to a spring- supported bell crank lever projecting into the path of the bolt on the elevator, and the weight is connected to a rack on the jaw by toothed and chain gear. In the construction shown in Fig. 14, the jaw 17 is connected by a cord 117 to a weight 116, and by a cord 94 and pulley 96 to a vertical slide 92, which is mounted in a casing 91 on the vice top 15 and suspended by a cord 127 connected with a spring drum 130. Downward movement of the slide 92 is normally prevented, to lock the jaw 17, by means of a transversely-movable rack 103 held . in engagement with a rack 101 on the slide 92 by a link 105, lever 106, and spring 108. The lever 106 is operated to release the slide 92 by means of a bell-crank lever 109, which is turned down against the action of a spring 110, into contact with a pin 114 on the lever 106, and projecting into the path of a lug 115 on the elevator 11. The lever 109 is held down by a catch 111, which can occupy two positions, either as a gravity catch for automatic release of the lever 109; when the elevator rises, or as fixed catch sustained by a block 133 when a number of successive lines are to be quadded. The slide 92 is raised by means of a lug 126 on the elevator 11 and a bar 119 normally retracted within the slide and projected as the slide descends, by the action of a spring 125 and fixed inclines 124 engaging rollers 122 on the bar. The jaw 17, Figs. 6 and 14, is provided with an extension 17<a> so that it is capable of closing the whole of the mould slot 14. The usual short motion of the jaw 17 for co-operation with the pump stop is provided for by connecting the racktar 45, Fig. 6, to the jaw loosely, by means of shouldered screws passing through elongated holes in the bar 45, or in a lug'in the bar 45 ; or a bar similarly connected to the jaw serves for attaching the cord 94, Fig. 14. The means for locking the jaw against backward movement during justification comprises a rack 66, Figs. 6, 8, and 14, on the jaw, and a series of spring or gravity pawls 63, 64, 65, Fig. 8, on a pin 67, which is shown as carried on the pump-stop lever 68, but may be on the vice top 15, in which case the pawls have play to allow the requisite movement of the jaw to cooperate with the pump stop. The pawls are, normally, disengaged from the rack by means of a pin 71, Figs. 6 and 8, on a lever 72 pivoted on the pin 67 and supported by a spring 73. The lever 72 is depressed by a projection 74, Fig. 8, or by the block 89, Fig. 12, on the elevator 11.