Patent GB-726414-A (GB)
Title: Control mechanism for type linecasting and composing machines
IPC: B41B27/10
Filed: 1953-11-06
Abstract: 726,414. Type-bar-making machines. TELETYPESETTER CORPORATION. Nov. 6, 1953 [Dec. 20, 1952], No. 30755/53. Class 100(3). Driving-mechanism.-In an automaticallyoperated, e.g. tape-controlled, typographical line-casting machine, certain ones of the operating members used for releasing different spacing elements (e.g. spacebands and fixed space matrices), which are normally actuated individually in response to corresponding recorded signals, are, in response to a particular recorded signal included in a series. of such signals corresponding to a line of type, actuated simultaneously, so as to simultaneously release said different spacing elements and increase the length of the line. If, after perforations corresponding to a line of type have been punched in a control tape, it is found that the line is too short for justification, an additional code perforation is punched to convert one of the "spaceband " signals into a special " add-fixedspace " signal, and subsequently when that special signal is sensed by the record-reader, an expandible spaceband and a blank "space matrix" are released together. At the same time, the mechanism is so conditioned that each subsequent normal " spaceband " signal in the line results in a similar double release, the elevator-raising signal at the end of the line restoring the mechanism to normal. In the normal operation of the machine, sensing of the code perforations causes selective shifting of a series of code bars 53, Fig. 4, having notches therein, so that when a spreader cam 61 allows a series of upper and lower selectable members 57 to move together, one such member is aligned with a notch in every bar 53 and swings far enough inwardly to bring a shoulder 62 into the path of a universal bail 63, which then moves to the left and moves the nose of the selected member 57 against a bell-crank to operate the requisite escapement reed in known manner. The two bell-cranks 164 controlling the spaceband and fixed space matrix release have depending portions extended beyond the normal length. When the particular member 57 controlling the spaceband release, shown as 115 in Fig. 5, is actuated, it operates its bell. crank 164 in the normal way, while a hook portion 118, Figs. 4, 5 and 9, extending rearwardly therefrom moves down in front of a Z-shaped projection 135 on a bail 131 pivoted on a shaft 123, and has no effect thereon. The special "add-space-band" signal operates a similar selectable member 116, and a hook portion 119 thereon moves down behind a projection 134 on a bail 122 also pivoted on the shaft 123. The movement of the universal bail 63 is then transmitted through the member 116 to rock the bail 122 counter-clockwise in Fig. 9, whereupon a link 143, Figs. 4 and 5, is moved to the right and actuates a parallelogram device 145, a blade 155 of which moves forward (to the left),- engages the extended depending portions of the bell-cranks 164 and causes the release of a spaceband and a space matrix. The projection 134 also engages the projection 135 and rocks the bail 131, which is thereupon locked in this second position by means of a projection 137 engaged by an arm 141 on a latching bail 139. When a subsequent "spaceband signal is received; the hook portion 118 of the member 115 moves down behind the projection 135, whereupon the movement of the universal bail 63 causes the bail 131 to be rocked further into a third position, and in this movement the projection 137 engages an arm 126 of the bail 122 and rocks the latter to operate the device 145 as before. When the elevator-raising signal is received, a hoop portion 121 of the selectable member 117 rocks the bail 139 to release the bail 131 and return the mechanism to normal. The bails 122, 131, 139 are spring- biased, the first two into their normal positions and the last into its locking position.