Patent GB-189902721-A (GB)
Title: Improvements in and connected with the Adjustable Moulds of Linotype Machines.
Inventor: LOCK WILLIAM HENRY
Filed: 1899-02-07
Granted: 1900-05-05
Abstract: 2721. Lock, W. H., and Wich, F. J. Feb. 7. Linotype machines.-Relates to improvements in the adjustable moulds of linotype machines, more particularly of the Mergenthaler machine (Specification No. 14,582. A.D. 1890). Fig. 9 shows the mould wheel O in front elevation, Fig. 2 in vertical section, and Fig. 5 in plan. The mould slot o in which the linotype is cast is formed between the bottom plate o<18>, secured to the mould wheel, and the cap plate o<17>, guided by plates 12 and adapted to move towards and from the bottom plate to close and open the mould. The mould is completed by the liners 1 and 2, which consist of plates carried by the jaw-blocks 3, 3<a> of the vice p<1>, p', and adapted to enter the mould slot as the mould wheel moves forward against the composed line of matrices. The liners 1 and 2 are easily detachable, and are made of varying thickness, so that linotypes of corresponding thickness may be cast. The liners are mounted on the jawblocks with sufficient play to enable them to be clamped metal-tight between the bottom plate and cap plate of the mould when the latter is closed. The mechanism for moving the cap plate o<17> consists of a pair of right and left handed screws, of which one, 16<a>, is shown in Fig. 2. The threads take into screwed sockets in the cap plate and in blocks secured to the mould wheel respectively. The screws are turned by a longitudinal rack 14, Fig. 4, which gears with pinions 15<a> carried by the screws and is operated by a three-armed lever 18, 20, 21. The screws are so threaded that the mould is closed when the arm 20 is depressed, and conversely. On a portion A of the main frame of the machine is a curved guide 29 on which travels a carriage 23 bearing two rollers, or preferably pinions, 22, 22<a>. A spring 29<a> tends to hold the carriage against the stop 32, but it is moved over to the right by means of a suitable lever during the advance of the metal pot towards the mould. The carriage is at its left-hand position at the time that the mould slot moves into the casting position, and the pinion 22<a> causes the depression of the arm 21 so as to open the mould. The mould wheel then moves forward into contact with the matrices, the liners entering the now open slot, but when the metal pot advances behind the mould wheel the carriage 23 is moved to the right, and the pinion 22 depresses the arm 20 so as to cause the cap plate to grip the liners tightly. After the linotype is cast the metal pot moves back, the carriage returns to the stop 32, and the mould is opened by the depression of the arm 21. The mould wheel then moves back to c'ear the liners, and turns through three-quarters of a revolution to bring the linotype into the ejecting position. In so doing the arm 20 is depressed by the pinion 22 so as to close the mould, the outwardly-projected arm 21 clearing the pinion 22 by passing through a notch, not shown, in its periphery. Yielding devices such as the hog-backed spring 35, Fig. 9, may be employed to allow of variation in the extent of movement of the rack 14 and pinions 15<a> in accordance with the thickness of the liners employed. Reference is made to Specification No. 8228, A.D. 1898.