Patent GB-794952-A (GB)
Title: Improvements in or relating to typographical line casting machines
IPC: B41B11/38
Filed: 1956-10-01
Abstract: 794,952. Type -bar - - making machines. MERGENTHALER LINOTYPE CO. Oct. 1, 1956 [Oct. 3, 1955], No. 29862/56. Class 100(3) Clamping matrices. In a typographical line-casting machine adapted for operation from a keyboard or from a coded tape, a device is provided for controlling the conditioning device for the quadding and centering mechanism to provide a selected operation when the machine is under keyboard control, and there is also provided a tape-responsive device to deactivate the controlling device and render the controlling device tape-responsive when the machine is under tape control. The devices are used with hydraulic quadding and centering mechanism as described in Specification 746,898, including a selector valve operating a piston 47, Fig. 6, to set a rack 46 in a position limited by stops 54, 55 according to the operation required. The selector valve is operated by a lever normally blocked, and released when a quadding or centering operation is desired by a solenoid 74, Fig. 12. The stops are set by solenoids 52, 53. Solenoid 52 alone is energized for centering, to release stop 54. Solenoid 53 alone is energized for Quad Left, acuating stop 55 and leaving stop 54 actuated, and both solenoids are energized for Quad Right, releasing stop 54 and actuating stop 55. Raising the assembly elevator results in the elevator-raising lever operating a switch 33 to close contacts 56 and then open contacts 55. When a line is moved to casting position, the delivery slide cam operates switch 37 to close contacts 59 and switch 38 to open contacts S8. Under automatic control, an elevator raise signal closes contacts S7, quad left signal closes contacts S1, quad right signal closes contacts S2, S3, and centering signal closes contacts S4. The controlling device comprises four push buttons 84, Fig. 11, any of which when depressed is locked by a tooth 91 below a catch 93, while depression of a button releases any button already depressed. Depression of any of the left three buttons closes contacts QL1, QL2: QR1, QR2, QR3; CE1, CE2, respectively, while depression of the fourth button opens contacts REG. Energization of solenoid 95 retracts the said tape-responsive device, i.e. the catch 93 to release any depressed button. For Quad Left, Quad Right, and Centering operations, relays C; C and D together; and D, respectively, are energized, and in the case of automatic operation additional relays A; A and B; B. The effect of the relays is to store or delay the effect of quadding and centering instructions until the corresponding line has reached casting position. Power is supplied across lines W1, W2. For Quad Left automatic operation, contacts S1 are closed to energize relay A, closing contacts A1 which complete a holding circuit, and A2. On receipt of the elevator signal, circuit is completed to relay C through contacts A2, S6, thus. closing contacts C1, which complete a holding circuit, C2 and C3 Opening of contacts S5 release relay A On closing of switch 37, circuits are completed to solenoids 53 through contacts C2 and 74 through contacts C3. For Quad Left push button control, circuit to relay C is completed through contacts QL2. In the same way, for Quad Right, solenoids 52, 53 74 and for Centering solenoids 52, 74 are energized. Under automatic operation, the elevator signal closes contacts S7, and a circuit is completed through contact S7; QL1, QR1 or CE1 of any depressed button, and REG, to solenoid 95 to release the button. If, however, the fourth button is depressed at the same time as another button, the release circuit, is opened at contacts REG, and quadding and centering operations remain under manual control.