Improvements in or relating to arrangements for returning the carriage of a motor-driven printing machine, for example a teleprinter, to the beginning of a line

摘要

806,133. Typewriters &c. SIEMENS & HALSKE, A. G. Nov. 5, 1956 [Nov. 4, 1955], No. 33743/56. Class 100(4) Carriage-return arrangements; driving arrangements. In a carriage-return arrangement e.g. for a page teleprinter wherein a carriage-return spring 3, 4 or pneumatic motor is tensioned by letter-space movement, an auxiliary motor 7 is provided and assists carriage return over portions or over the whole of the path of the carriage, when operating conditions unfavourable for carriage-return obtain. The carriage-return spring mechanism 3, 4 is permanently geared to the motor 7 which is operative when a carriage-return action doses contacts 12 and a gravity controlled mercury switch 15 indicates that the return of the carriage is either along a horizontal or up a gradient, as may be the case when the machine is used in e.g. an aeroplane. Shock-absorbing arrangements. The motor may be cut-off before the carriage reaches the end of its run by contacts 14 opened by an actuating plate 13 on the carriage. A pneumatic shock-absorbing stop 16, 17 is provided to further reduce shock at end of the carriage run.