Patent GB-190615987-A (GB)
Title: Improvements in Machines for Casting Lines of Type.
Inventor: JOHNSON JAMES YATE
Filed: 1906-07-14
Granted: 1907-06-20
Abstract: 15,987. Johuson, J. Y., [Aix, F. C. L. d']. July 14. Linotype machines.-Relates to the casting, trimming, and ejecting mechanism of linotype machines, particularly of the kind in which a line of matrices is conveyed by a rotating carrier from the assembling to the casting and distributing positions. In a frame A is mounted a rotatable annular frame B having one or more ribbed matrixcarrying cylinders C. A line of notched segmental-matrices m, Fig. 13, is assembled and transferred to one of the cylinders C when in its lowest position. The line is confined by sliding blocks D having tongues d which project between the mould jaws E and determine the thickness of the slug. The blocks D are prevented from moving apart by locking-pieces, one of which is adjustable, mounted on the frame A. The frame B is rotated by suitable means to bring the matrices first to the casting position and then to the highest or distributing position. Two spring-closed jaws E, which form the top and bottom of the mould, are mounted in a slide F, Fig. 5, which can move lengthways in a frame G to carry the slug from the casting to the ejecting position. The frame G is carried by two slidiug rods G<2>, each having a fixed and a yielding collar between which projects a lug H' on the melting-pot H. The melting-pot is supported by rollers on inclines h so that it moves to the left by its weight. The frame G and jaws E are thereby pressed against the line of matrices, and the nozzle of the melting-pot bears against the rear side of the jaws. The melting-pot is retracted by a lever I and cam. The slide F is moved from the casting to the ejecting position and back again by means of a rack gearing with a pinion g on one of the rods G<2>, which is rotated by toothed wheels from two double-armed levers 8, 9 actuated by pins 10, 11 on the frame B. The ejector J, Fig. 5, is carried by sliding rods and is actuated by a lever and pin on the frame B. The mould jaws E are guided by inclined slots and pins on the slide F, and are pressed to the right and towards each other by a spring f<2>. When the slide F reaches the ejecting position, the jaws are opened by striking an abutment g<10> on the frame G, which moves them to the left and compresses the spring f The jaws are held open, as the slide returns, by spring detents which enter notches in the jaws when they are. pushed back by the abutment g<10>. When the slide F reaches the casting position and the frame G moves towards the line of matrices, the detents are withdrawn by fixed cams and the spring f<2> causes the jaws to close on'the tongues d, Fig. 13. Only one of the jaws E may be movable if desired. The front or type-face end of the slug is trimmed, as the slide F moves to the right, by two knives I, which are guided to move vertically with the jaws E but are prevented from moving with the slide. The rear end of the slug is trimmed by a rotary knife I' mounted on one of the rods G<2>. In a modified form of trimming-mechanism, which may be applied to one or both of the mould jaws, the jaw E, Fig. 23, is grooved, and can slide on a plate n which is guided to move vertically with the jaw and is provided with knives I, P for trimming the front and rear edges of the slug. The plate n may have grooves n<2> which form ribs on the slug and ensure its withdrawal from the line of matrices The ribs are removed by a cutting-edge n', Fig. 17, which forms one side of an opening in the plate n. The cutting-edge n<4> may project above the surface of the plate in order to form recesses in the face of the slug.