Patent GB-228842-A (GB)
Title: Improvements in or relating to telegraphic receiving apparatus suitable for use with printing apparatus
IPC: H04L17/20
Filed: 1923-11-05
Abstract: 228,842. Creed & Co., Ltd., and Creed, F. G. Nov. 5, 1923. Electric type-wheel machines.-Relates to telegraphic type-printing receivers in which members are adjusted by the incoming signals to set a series of selector combs. The adjustable members i, Figs. 2 and 3, are pivoted with spacing blocks on a pin 7 adapted to be raised and lowered in guides by a lever 13 controlled from a cam groove C in a sleeve e mounted on a motor-driven shaft f for start-stop operation under control of the signals, and, while the pin 7 is in its lowered positon, each of the members i upon which the signal-actuated mechanism is operative is moved beneath an arm 1<a> projecting from a corresponding annular selector comb 1. Upon the subsequent raising of the pin 7 these members i act on the arms 1<a> to rotate their combs on their support 2, against the action of springs 5, into a position to allow one of a series of selector bars 6 to be. moved by its spring 6b on its pivot 2a into the path of a projection 33 on the shaft of the type-wheel 31 driven through a friction clutch from a motordriven shaft 28. The type-wheel may be constructed as described in Specification 164,370. The operated members i are returned to normal position upon subsequent lowering of the pin 7 by the engagement of their lower V-shaped ends i<@> between fixed plates 11, Fig. 3, or by levers 35, Fig. 9, fulcrummed on the pin 7, and coacting as shown with a stop 36. In a modification, Fig. 11, the pin 7 is mounted in a holder 8 pivoted at 8<a> and a lug i<1> on each member i normally engages under the action of a spring 39, between a spring 40 and a fixed plate 38. The members i displaced by the pin a are held displaced by the spring 40 to enable their upper ends to engage recesses provided in the arms 1<a> as the pin 7 rises. Upon the subsequent lowering of the pin 7 the displaced members i are returned by their springs 39 into position to engage above the spring 40. The bars 6 are released and reset by the action on their arms 6a of a collar 20 sliding on the support 2 under control from a cam groove D in the sleeve e and a hammer 23 for moving the appropriate type-lever carried by the type-wheel to printing position is controlled from a cam groove E in the sleeve e. The paper feed may be controlled by the movement of the lever d actuated from a cam groove A in the sleeve e. Case-shift mechanism. - A second series of selector bars 6<x>, Fig. 13, corresponding to figures or special characters on the type wheel 31, is provided, each bar 6* being disposed adjacent to one of the bars 6 so that the combs 1 allow the one or the other bar to move into operative position in response to a group of signals according to the position of a shift comb 1<A>. A pin 46 on this comb is engaged by a notch in a plate 43 pivoted to a fixed ring 45 and provided with arms 43<d>, 45e for engagement by the space selectors bars 6<A>, 6<B> respectively to adjust the comb to one or other of two positions in which it is held by a spring-controlled roller 47 bearing against the pin 46.