Patent GB-433546-A (GB)
Title: Improvements in or relating to typographical slug casting machines
IPC: B41B11/38
Filed: 1934-02-16
Abstract: 433,546. Type - bar - making machines. LINOTYPE & MACHINERY, Ltd., 9, Kingsway, London.-(Assignees of Mergenthaler Setzmaschinen - Fabrik Ges.; 25, Chausseestrasse, Berlin) Feb. 16, 1934, Nos. 5186, 5187, 5188, and 5189. Convention dates, Feb. 17, 1933, June 21, 1933, July 8, 1933, and July 8, 1933. [Class 100 (iii)] Quadding-apparatus ; justifying matrices.-Relates to apparatus for centring short lines or for quadding lines at either end in which the vice-jaws are operated by a vertically movable rod. (1) The jaws 2, 3, Fig. 2, are moved by levers 6, 7, arms 10, 11 on which carry pins 12, 14, Fig. 3, which project between two discs 17, 18 on a sleeve 19 rotatably mounted on a vertically movable rod 31. The upper disc 17 is cut away at one side, so that by suitable rotation of the sleeve, either or both of the pins 12, 14 will be engaged by the disc as it descends, and one or the other or both jaws caused to close on the line. The pin 14 passes through a hole in the arm 10, and can be withdrawn by a lever 13, so that both of the pins can be disengaged from the disc 17 when the device is to be put out of action. The sleeve 19 is rotated, in order to position the disc 17, by a gear-wheel engaging a rack-bar 25, which is operated by means of a handle 28. The rod 31 is drawn down, in order to close the jaws, by springs 48 connected to a crossbar 47 at the lower end of the rod, but is normally retained in the upper position by a detent 50, which engages an annular groove in the rod. The detent is withdrawn by the justification lever when it begins to rise. After the casting, the rod is raised again by the first elevator lever, which has an excess motion for the purpose. In order to prevent the jaws from violently contacting with each other after the line has been removed from between them, the rod 31 is braked by a roller 40 eccentrically mounted on a lever which is operated by the justification lever towards the lower end of its stroke. When the device is to be put out of action a detent 34, Figs. 2 and 8, is moved beneath an enlarged part 32 of the rod 31 by means of a sliding bar 36, so as to prevent the descent of the rod. The detent 34 is connected by a rod 16 to the lever 13, that withdraws the pin 14 from beneath the disc 17. (2) In order to clamp the line after the jaws have closed on it, the part 32 of the rod 31 is formed with a rack 61 gearing with a pinion, to which is secured a ratchet-wheel 64 adapted to be engaged and rotated by a pawl 65. The pawl is pivoted to a rocking arm 68, which is engaged and lifted by a projection 78 on one of the justification rods 77, so as to force the rod 31 downwards and clamp the line. The arm 68 acts through a lever 71, Fig. 2, rod 72<1>, and lever 73 to move the pump-stop lever 75 and permit the pump to act. The device may be left in action when full-length lines and lines to be quadded or centred are cast alternately, and means are provided for preventing a full length line from being clamped too lightly, so that the spacebands cannot be driven up. These means comprise a second ratchet-wheel 81, Fig. 16, oppositely toothed to the ratchetwheel 64, and engaged by a pawl 82 on the usual inclined link 83 that controls the justification bar, so as to move the jaws outwards and slacken the line just before the justification bar reaches the spacebands. The action of the pawl is limited by a cam-shaped shroud 85, and a lost-motion connection may be provided between the ratchet-wheel and its shaft for the same purpose. Means may be provided for moving the pawl out of action, to prevent the slackening of the line when a line is to be centred. (3) Means are provided for preventing the clamping movement of the jaws, which tends to produce a centred or quadded line, from taking place in the case of lines which are intended to be of full length, provided that the line reaches a certain measure. In this device, the ratchet-wheel 64, Fig. 26, through which the clamping is effected, has an untoothed portion, and the pawl 65 can be adjusted to receive a small idle movement, during the downward motion of the rod 31, before the pawl engages the teeth. If the line is nearly full, the movement of the jaws in closing on the line is insufficient to cause the pawl to engage the toothed part of the ratchet, so that the clamping-device is not operated. Means operated by a hand - lever are provided for adjusting the initial position of the pawl to correspond with the capacity of the spacebands normally present in short, medium, and long lines. If this amount of line shortage is exceeded, the line will be automatically centred or quadded. The arm carrying the pawl 65 is connected with the pump-stop lever in such a way that, if a jaw becomes jammed and does not contact with the line, the excessive rise of the justification bar will bring the pump-stop into action. The rack 61 on the rod 31, through which the clamping of the line is effected, is yieldingly connected to the rod, so that, in the event of the rod being unable to move, sufficient movement of the pawl 65 can occur to operate the pump-stop lever, and permit the line to be cast. The yielding connection also prevents damage in case the ratchetwheel 81, Fig. 16, cannot turn, owing to the line being too tight to allow the jaws to expand. (4) In order that the justification mechanism may act, in spite of the additional pressure on the line caused by the clamping-device, the justifying-spring is reinforced by one or two additional springs, which serve to balance the weight of the justifying-mechanism ; or counterweights or other means may be used. (5) In order to diminish friction, the vice-jaws are guided by rollers mounted on the blocks that support the jaws.