Patent GB-532723-A (GB)
Title: Improvements in and relating to typographical composing machines
IPC: B41B11/06
Filed: 1940-01-16
Abstract: 532,723. Type-bar-making machines. INTERTYPE, Ltd. Jan. 16, 1940, No. 937. Convention date, Sept. 23, 1939. [Class 100 (iii)] [Also in Groups XXXVII and XXXVIII] Magazines; driving - mechanism.-The magazines are shifted by power means, which is independent of the usual driving-mechanism of the machine and comprises a reversible electromotor controlled by a hunting-switch, any desired magazine being positioned by the setting of a selecting-lever. Safety devices are provided for ensuring a clear path for the magazines before a shifting operation. The arrangement is described as applied to a machine having four magazines, any pair of which can be brought into operative relation with double assembling and distribution devices. The magazine unit receives in known manner, a rising and falling movement in addition to a movement of translation, to enable the magazines to clear the upper ends of the escapement-reeds. Each magazine base-frame has a sliding removal-carriage, as described in Specification 422,524. The lower magazine of the pair in use is, as heretofore, retracted before the magazines are shifted, in order to bring the magazines into uniformly stepped relation. This is effected by means of a hand-lever 1, Fig. 1, which acts upon the removal-carriage of the magazine. The handlever also opens the magazine entrance-frame F, Fig. 4, which turns first about a pivot 53 and then about a pivot 54. A trigger 3, which is gripped with the hand-lever, acts on two Bowden wires 4, 5. The wire 4 disengages the locking- pawl 14 of the entrance-frame F, and withdraws a bolt, which holds the removal frame in the higher or lower position by engagement with a notched plate. Imperfect action of the bolt causes a sliding pin to lock the magazine unit to the machine frame. The withdrawal of the bolt also opens a switch in the circuit of the driving motor. A second switch in the motor circuit remains open if the hand-lever is not fully depressed. If the trigger 3 is not fully squeezed, the hand-lever remains locked by the action of a stud connected to the Bowden wire and movable in a cam-slot in the machine frame. The Bowden wire 5 rocks two reed depressorbars, 99, 103, Fig. 10, which push down any projecting escapement-reeds out of the path of the magazine unit, and also moves a matrixdetector-bar 109 across the mouth of the lower of the active magazines. After the shifting of the magazine unit, the lower magazine of the new pair in use is caused to slide forwards into a position level with the upper magazine by operation of the hand-lever in the reverse direction. The rack-mechanism, by which the magazine unit is shifted, is driven through a worm 118, Fig. 1, from an electro-motor 122, which remains constantly in gear. The desired pair of magazines is selected by a hand-lever 130, which is adjustable into any of three positions. The movement of the lever makes the circuit of the motor, which runs until the new magazines are in operative position and is then automatically switched off. The motor circuit may contain a safety-switch, which is held closed by lateral pressure by the operator upon the selecting-lever, which contains a flexible section. The shifting movement can thereby be instantly stopped, when necessary. Motor control-mechanism. The hand-lever 130 operates one member of a hunting-switch, whereby the magazine unit can be moved from one position to any other, whether adjacent or remote. The lever has connected to it an insulating-block 136, Figs. 16 and 17, containing two spring-pressed carbon brushes 139, 140. The brushes are adapted to bear on, and travel over two pairs of conducting-segments 142, 144, which are carried by a rotatable member 129, and are separated by an insulating-block 141. The rotatable member is connected by gearing to the motor. In the rest position, the brushes 139, 140, to which the current leads are connected, are in contact with the insulating-block 141. By adjustment of the hand-lever, the brushes are moved into a selected position on one or the other pair of conducting-segments 142, 144. The circuit of the motor is thereby closed, and the member 129 is rotated until the brushes are again on the insulating-block 141, when the motor and the magazine unit stop. The pairs of conducting-segments are so connected to the motor as to cause it to turn in one or the other direction, as required. In a modification, the controlswitch comprises a sliding cam-plate 175, Fig. 26, which is adjusted by a hand-lever, and a sliding contact-box 173, which is moved by the motor. The contact-box contains two contactlevers 186, each carrying a six-point contactblock 188, which co-operates with a fixed sixpoint terminal 190 to close the circuit of a reversible three-phase motor. In the rest position, two trip-levers 192 having cam projections 213 are supported by the plate 175. To each trip-lever is pivoted a U-shaped lever 208, which projects into a recess 210 in one of the contact-levers 186, so as to form a toggle. When the plate 175 is moved one or two steps in either direction, one or other of the trip-levers falls, and the toggle-levers 208, 186 are caused by a spring 212 to snap past the dead-centre position and close the switch. When the contact-box overtakes the plate 175, the switch is opened again. Specifications 14582/90, [Class 100], and 488,977 also are referred to.