Patent GB-433872-A (GB)
Title: Improvements in typographical slug casting machines
IPC: B41B11/38
Filed: 1934-02-22
Abstract: 433,872. Type-bar-making machines. MERGENTHALER LINOTYPE CO., 29, Ryerson Street, Brooklyn, New York, U.S.A.- (Assignees of Morrison, L. E. ; 125, East 74th Street, New York, and Frolander, F. C.; 1144, Anna Street, Elizabeth, New Jersey, both in U.S.A.) Feb. 22, 1934, Nos. 5840 and 5841. Convention dates, Feb. 23, 1933 and Sept. 16, 1933. Addition to 387,279, [Group XV]. [Class 100 (iii)] Clamping and cleaning matrices.-The quadding and centring mechanism described in the parent Specification is provided with means independent of the line for increasing the distance between the jaws to permit a line to be expanded by the space-bands, improved means for operating the pump-stop, means for supporting the jaws against angular displacement during justification, and means for wiping the end matrices of the line against the jaws to remove adhering metal. (1) As described in the parent Specification, the vice-jaws E, F, Fig. 3, are moved towards each other by a vertically movable rod H, which can be connected to either or both of the jaws through levers E2, F<2>. Rotatably mounted on the upper end of the rod is a grooved collar N<1> having two segments N<2>, N<3>, Fig. 12, for engagement with pins N<4>, N<5> on the levers E2, F2, so that, according to the position of the collar, either or both of the jaws are operated, or both are disconnected. The collar is rotated by means of a rack-bar o<2>, Fig. 5, operated by a hand lever and gearing with a pinion o<5>, which can turn the rod H by means of two bevel-pinions o<5>, o<6>, when the rod is in the upper position. When the rod descends, the bevel-pinions are locked by detents engaging with notched discs. The rod H is operated from the main shaft of the machine, as heretofore, by a lever H<10>, Fig. 14, which is operated through a spring H<14> by a second lever H<17> actuated by a cam. The rod is locked in its downwardly moved position by a clamping-member J<1>, Fig. 5, operated by a toggle-member J and a link J<2> from the lever H<17>, which has an excess movement over that of the lever H<10> after the jaws have made contact with the line. The clamping-member J<1> acts on a sleeve T, which surrounds the rod and through which the rod can move upwards to a limited extent after the sleeve has been clamped, in order to separate the jaws and to allow the line to be expanded by the spacebands. The sleeve T is pressed upwards against a collar H<1> on the rod by a spring T<2>, which bears against a second collar T<1>, and the upward movement of the rod is effected by an additional cam acting on the lever H<10> through a spring. The upward movement of the rod is controlled by a cam V, which engages the upper end of the sleeve and can be turned by means of a hand lever V<6>, Fig. 8, to permit any degree of movement up to, say, 3 ems. By manipulation of the lever V<6>, different word-spacings may be produced in lines of the same length, or lines composed to slightly different lengths may be justified to approximately the same length, which may be desirable in the case of lines fitted about inserts. To the cam V is fixed a slotted arm V<3>, through which passes a pin on the hand lever V<6>, so that, apart from the initial setting of the cam by the hand lever, the cam will be further turned as the rod H descends. The amount of opening of the jaws is thereby automatically diminished in the case of the shorter lines, which contain fewer spacebands, and, in the case in which no line is presented and the jaws close completely, no opening of the jaws is permitted. Concentric portions at the highest and lowest points of the cam permit a certain movement of the rod without affecting the opening of the jaws. (2) The manual setting of the cam V by means of the hand lever V<6> may be replaced by an automatic setting effected by the manual adjustment of the left-hand jaw in accordance with the length of the line. Two cams of different eccentricity are used for quadding and for centring respectively, and are shifted axially, to bring one or the other into use, by connections to the hand lever that determines the closing of one or both jaws. The cams are rotated in accordance with the length of the line by connections from a lever, one end of which engages in a horizontal slot in a plate supported on parallel links adjacent to the adjustable jaw. The upper edge of the plate is inclined, and engages a corresponding incline on the jaw, so that the plate rises and falls with the movement of the jaw and adjusts the cams accordingly. (3) The pump-stop lever L, Fig. 10, which is normally operated by the outward movement of the right-hand jaw, in order to release the pump, is arranged to be operated by the inward movement of the jaw to quadding or centring position. For this purpose, the left-hand jaw E is provided with a pivoted section L<1>, which normally projects beyond the matrix-engaging face of the jaw. When the right-hand jaw F clamps the line against the jaw E, the section L<1> is pushed back, and acts through a lever L<4>, a parallel-motion link L<5>, and a lever L<8> on the pump-stop lever. The lever L is operated through a sliding interponent M, which is positioned between it and either the lever L<8> or the jaw F, according as the machine is set for quadding or for ordinary operation. The interponent is shifted automatically by connections from the rackbar O<2>, Fig. 5, that rotates the jaw-selecting collar N<1> of the rod H. If, after the jaws are moved apart, the spacebands do not fill out the line, the jaws will close on the line again, and the rod H will move downwards in the sleeve T. The pump-stop lever is then locked, in order to prevent the casting, by a lever R, Fig. 3, operated by a spring R<11>. If the line is properly justified, the upward movement of the collar T<1> on the rod H acts through a lever R<3> and a parallel-motion link R<5> to retract the lever R and to permit the pump to act. (4) The jaws are held against upward displacement during justification by a depending bracket S, Fig. 10, on each jaw, which is formed with a lip S<1> to engage under a shelf S' on a bar S<3>, which is secured to the vice frame. (5) The jaws are caused to exert a wiping action on the end matrices of the line as the first elevator ascends, in order to remove any metal adhering to the matrices or to the jaws. For this purpose, the cam that holds the jaws closed is slightly extended, so as to continue in action for a short time after the elevator has commenced to rise.