Patent GB-478031-A (GB)
Title: Improvements in or relating to type line composing and casting machines
IPC: B41B11/06
Filed: 1936-12-23
Abstract: 478,031. Type-bar-making machines. TELETYPE CORPORATION. Dec. 23, 1936, No. 35221. Convention date, Dec. 30, 1935. [Class 100 (iii)] Magazines and escapements, driving - mechanism.-In automatic control-mechanism of the kind described in Specification 415,798, powerdriven means are provided for effecting a change of magazine either by shifting of the magazines themselves or by adjustment of a movable set of escapement-reeds. Means are also provided for suspending the operation of the record-strip reading-device during a change of magazine, for rendering the magazine shift - mechanism non-responsive to repeated identical shift-signals, and for preventing such repeated signals from effecting a fulllength delay in the operation of the strip-reading mechanism. (1) The magazine shiftmechanism comprises togglelinks 131, 132, Fig. 2, which are connected to the underside of the magazines 126, and are operated by a lever 137 and a crank-member 142. The crank-member is turned through a half-revolution at a time by gearing connectible through a clutch 154 to a constantly rotating gear 153, successive halfrevolutions serving to raise and to lower the magazines. The clutch is closed by a forked member 165 operated by a crank-shaft 167, and is held closed for a half-revolution of the crank-member 142 by a lever 162 co-operating with notches in the crank-member. The crank-shaft 167, that closes the clutch, may be operated manually, by means of a keylever 172, or automatically, under the control of a signal in the record-strip, by an arm 176 on a shaft 120. The shaft 120 is rocked by a cam 101, which can be connected by a clutch 96 to a rotating shaft 80. The cam 101 acts on the shaft 120 after a predetermined time interval,. to permit the previously operated parts of the machine to return to their normal positions. The clutch 96 is controlled by a lever 98, which is tripped by a lever 109, actuated by one or the other of two arms 75, 76 on two concentric vertical shafts 43, 49. These shafts have at their lower ends arms 42, 48, Fig. 1, which can be rocked by bell-crank levers 39, 46. One or the other of the levers 39, 46 is operated, under the control of a shift-signal in the record-strip, by pull-bars 35, 36, which are brought into action by the notched code-bars 34. The stripreader shaft 12, is, as heretofore, driven from a rotating gear 10 through a clutch 14, which can be disengaged by a throw-out lever 18. The lever 18 is moved into operative position, against the action of a spring 22, by a link 27, which is drawn forwards by either of the bellcrank levers 39, 46, and is then held by a spring latch 59. Towards the end of its rotation, the shifting-cam 101 rocks a shaft 89, which acts through a lever 88, a third vertical shaft 68, and a lever 65 to withdraw the latch 59 and cause the reader-shaft 12 to be re-started. The reader-shaft is also stopped, when a signal for operating the assemblerelevator is presented, by a pull-bar 37, which, in addition to effecting the starting of the elevator-shaft 30, rocks a bell crank 53 and shifts the link 27. The reader-shaft is restarted by a cam 71 on the elevator-shaft, which trips the latch 59. (2) Since a second identical shift-signal would, by imparting a half-rotation to the crank-member 142, have the effect of shifting the magazines in the opposite direction, means are provided for rendering such a signal inoperative. The lever 109, that initiates the shifting operation, and a three-armed lever 110 associated with it, are adjusted vertically by a rod 177 connected to the magazines. A shift movement therefore moves the lever 109 out of the path of the arm 75 into that of the arm 76 or vice versa, so that a second identical signal will not operate the lever. Instead, the actuated arm 75 or 76 acts through the lever 110 to cause a clutch 83 to connect a cam 86 to the shaft 80. The cam acts through the lever 88 and the vertical shaft 68 to withdraw the latch 59, so that the reader-shaft 12 is at once re-started. (3) In an arrangement for shifting the matrix-releasing reeds instead of the magazines, the reeds 247, Fig. 3, are supported in a cradle 248, which is rocked by a lever 254 pivoted at its upper end. An arm 262 on the lever is disposed between arms 228, 232 of two U-shaped levers 218, 221, which can be rocked in respectively opposite directions by cams 202, 204. The cams are connectible to a rotating shaft 194 by clutches 197, 199, controlled by levers 190, 191, which are rocked by arms 185, 186 on the vertical shafts 43, 49. After the shifting movement, one of two cams 201, 203, connected to the cams 202, 204 respectively, rocks a shaft 206, which acts through a lever 216 and the vertical shaft 68 to re-start the record-reader shaft.