Patent GB-449088-A (GB)
Title: Mechanism for controlling matrix-setting and type line casting machines
IPC: B41B27/10
Filed: 1934-12-19
Abstract: 449,088. Type - bar - making machines. TELETYPE CORPORATION, 1400, Wrightwood Avenue, Chicago, U.S.A.-(Assignees of Walden, L. M. ; 40, Birch Street Town, Mount Vernon, New York, and Larson, E. S. ; 6233, Magnolia Avenue, Chicago, both in U.S.A.) Dec. 19, 1934, No. 36407. Convention date, Dec. 29, 1933. [Class 100 (iii)] Driving-mechanism; assembling matrices; escapements.-In record-strip control mechanism of the kind described in Specification 415,798, means are provided for delaying the action of certain signals in the strip, such as those for adjusting the movable assemblerrail, so as to give time for the completion of a preceding operation, such as the entry of a matrix into the assembler. This is effected by arresting the feed of the record-strip for a definite and variable interval whilst the rest of the control mechanism continues in operation. As described in the prior Specification, the record-strip 11 is advanced by a sprocket-wheel 12, which is rotated by a ratchet-wheel 16 and a pawl 17 carried by a lever 18. The strip feeler-levers 32 are operated by springs, and are retracted by a cam 29 acting through a spring. The transfer-levers 41, which receive the setting of the feeler-levers, are connected by slide-bars 73 to the notched code-bars 61 that control the operation of the machine. The two levers 63, 64, that serve to operate the movable assembler-rail, are normallv blocked by an additional code-bar 107, which is unprovided with a feeler-lever. Each of the two signals for operating the assembler-rail causes such a re-arrangement of the code-bars and of the slide-bars 73 that an alignment of notches is produced in the slide-bars, into which a rod 75 carried by a lever 76 enters. An arm of the lever is thereby rocked into the path of the strip-feeding lever 18, so that the strip is arrested. A pawl 84, which is reciprocated by a cam on the cam-shaft 28 of the controlmechanism, is simultaneously permitted to engage a ratchet-wheel 91, which is thereby advanced step-by-step against the tension of a spring. After a number of operations of the pawl 84, a pin 99 on the ratchet wheel 91 engages and rocks a lever 102, which acts through a lever similar to the feeler-levers 32 to cause the special code-bar 107 to be retracted, so that the delayed signal is permitted to act. The retraction of the slide-bar 73 connected to the code-bar 107 permits feed of the strip to be resumed. The length of the delay can be varied by means of an adjustable stop, which co-operates with an arm on the shaft of the ratchet-wheel 91. The Specification as open to inspection under Sect. 91 comprises also means for applying the delay-mechanism to the shifting of a set of escapement-reeds, in order to effect a change of magazine. In this device, the shift-signal, when allowed to act at the end of the delay, operates one of two levers 65, Fig. 6 (Cancelled), which act through two sliding bars 115, 116 and a T-shaped lever 122 to shift a link 126, which rocks the escapement-reeds in either direction. To the lever 122 are pivoted two three-armed levers 137, 141, which are connected together by a spring 139, and carry set-screws 154, 155, which engage the arm 124 of the lever 122. The levers 137, 141 are adapted to be engaged by spring-pressed locking-pawls 146, 149, in order to hold the lever 122 and the link 126 in either of their extreme positions, and, in the arrangement of the parts shown in Fig. 6 (Cancelled), the lever 137 is engaged by its locking-pawl 146. When the next shift-signal operates, the upper lever 65 shifts the sliding bar 115 and causes the lever 141 to be engaged by its locking-pawl 149, the spring 139 being stretched. The locking-pawl 146 is then caused to release the lever 137, whereupon the spring 139 causes the shifting of the lever 122 and the link 126. This subject-matter does not appear in the Specification as accepted, but forms the subject of Specification 448,880.