Patent GB-416796-A (GB)
Title: Improvements in or relating to type setting systems
IPC: B41B25/00
Filed: 1933-03-21
Abstract: 416,796. Type - making machines. TELETYPE CORPORATION, 1400, Wrightwood Avenue, Chicago, U.S.A.-(Assignees of Krum, H. L., Reiber, A. H., Goetz, M. T., Sylvester, K. A., and Huber, O. A.) March 21, 1933, Nos. 8560, 8561, and 8562. Convention dates, March 25, 1932. [Class 100 (iii).] Strip-perforating machines ; keyboards; justifying type.-A machine for perforating record-strips, more particularly for controlling type-bar-making machines, has indicating means for showing the length of the composed line, which is operated from the keys through selecting-mechanism, the setting of which is stored and is subsequently transferred to the indicating means, so that the selecting- mechanism can again be operated during the operation of the indicating means. A pair of differentially movable pointers indicates the expansibility of the spacebands in the line, and co-operates with a length-of-line pointer to show when the line is justifiable. Selecting and punching mechanism. Keylevers 2, Fig. 2, pivoted on a rod 4, are adapted to act on pairs of notched permutation-bars 25, 26, which are supported by pivoted rockermembers 27, Fig. 5, so that, when one bar is depressed by a key-lever, its companion bar rises. The members 27 operate sliding bars 35, which act through levers 37 on punch-interference bars 42. Each key-lever supports a sliding code-member 12 having two projections 65, which are adapted to operate selector-bars 43 also supported by rocker-members. Each selector-bar, when depressed, acts through a sliding bar on one of a series of Y-shaped levers 52, Fig. 5, which operate the counting- mechanism. The two projections 65 on each code-member correspond to different founts, and the code-members are pivoted at their rear ends to a rocking member 15, which can be operated by two shift key-levers 5, 6, so as to bring either projection 65 into use, and to vary the effect on the counting-mechanism according to the fount. A movable visual indicator, having differently coloured sections, is connected to the rocking member 15, so as to show the position of the code-members. The punch-interference bars 42, Fig. 5, are caused to operate the punches 55 by the pivoted armature of an electromagnet 56, which also operates a feed-pawl 58 for the record-strip 61. Back-spacing of the strip can be effected by means of a plunger-key carrying a pawl, which engages a star-wheel on the shaft of the feed-roller 64, a cam being provided to disengage the feed-pawl 58. One selector-bar, operated by all the key-levers, closes the circuits of the electromagnets that operate the punches and the counting-mechanism. This contact is held closed by a spring latch, to ensure the action of the magnets, and the latch is released by the armature of one of the magnets. Certain function keys, such as the shift-keys, for which no counting is necessary, operate a device which breaks the circuit of the operating-magnet of the counting-mechanism. A hand-switch in the circuit of the punch-operating magnet enables counting to be effected without perforation of the strip, so that the operator can ascertain whether the line will justify. Units-counting mechanism. The movement of the selected Y-shaped lever 52, Fig. 5, brings its arm 67 beneath an arm 71 of one of a series of T-shaped transfer-levers 73, heads 87 on which engage notches in a series of sliding stop-bars 88. The series of levers 73 is carried by a lever 75, which is rocked by an electromagnet 92 to bring the transfer-levers 73 into contact with the levers 52. One of the stopbars 88 is thereby advanced, and any previously advanced stop-bar is retracted by the engagement of the arm 72 of its transfer-lever with the arm 68 of the corresponding lever 52. The operated stop-bar is moved into the path of a projection 136 on the units-rack 93. The stop-bars may be pivotally instead of slidably mounted, and are then operated directly by the key-levers, the operated bar being held in shifted position by a detent. The units-rack 93 is mounted to slide on a member 96, Fig. 15, pivoted at one end, and is movable into and out of engagement with a units-wheel 98, which tends to rotate under the action of a friction drive and is normally held against rotation by a pawl 133. The units-rack and the holding-pawl 133 are operated by a floating lever 153, which is pivoted on the units-rack slide 96 and is connected at one end to the pawl 133 by a link 152. The other end of the lever 153 is connected to an arm of a lever 156, which is rocked by a cam-disc 115, to engage and disengage the units-rack and holding-pawl. The cam-disc 115 makes a half-revolution at a time under the influence of a friction drive, and is controlled by a notched disc and an escapement-pawl which is operated by an electromagnet at each key-depression. After encountering the projected stop-bar, the units-rack is retracted by a spring-actuated lever, and its movement is cushioned by spring stops at both ends of the stroke. A projection 150 on the holding-pawl 133 engages below the end of the slide-member 96, to ensure that the pawl engages the unitswheel before the rack is disengaged therefrom. The movements of the pawl 133 and member 96 are limited by stops to prevent wedging resulting from a too deep engagement of the teeth. Line-indicating mechanism. The progress of the line is shown by a pointer 203, Fig. 20, moving over a scale 228, and the amount of expansion provided for by the spacebands is shown by the differential movement of two pointers 253, 254, which move towards the pointer 203 from the opposite end of the scale. The pointer 203 is rotated by gearing from the units-wheel, and is movable axially to disengage it from its driving-mechanism at the end of a line, and to permit it to be returned to initial position by a spring. The axial movement is effected by an electromagnet, the circuit of which is closed by depression of an end-of-line or elevator key-lever. The pointer is arrested in its initial position by a stop 252, which is adjustably secured in an arcual slot 248 by a clamping-screw 249. The stop is carried by a pivoted arm, which can be turned into either of two positions, so as to give a large range of adjustment in comparison to the length of the slot 248. The spaceband pointers 253, 254 are operated by the space-key through ratchetmechanism, and are moved by different geartrains, so as to indicate the expanded and unexpanded thickness of the spacebands respectively. The distance between the pointers thus indicates the amount of expansion possible. The actuating-mechanism of the pointers is exchangeable, to suit different sizes of spacebands. The elevator-key releases the pointers, which are returned to initial position by a spring. A line-counter is operated by the elevator-key. When the line is of justifiable length a signal lamp is lighted, the circuit being made by the joint action of cams moving with the pointers 203, 253.