Patent GB-165820-A (GB)
Title: Improvements in or relating to telegraphic receiving apparatus
IPC: H04L15/32
Filed: 1919-03-25
Abstract: 165,820. Creed, F. G., and Creed & Co., Ltd. March 25, 1919. Receivers with mechanical source of power; perforated-strip recorders.-In a strip-perforating receiver the punches and connecting-rods are operated positively by groove cams, thereby avoiding the use of springs. The cam-rollers are mounted upon levers to which the punch-rods and connecting-rods may be adjustably connected to vary the strokes of these rods. The cam grooves. are cut upon a rotatable shaft driven through a friction clutch, and the intermittent and alternate operation of the punches and connecting-rods is obtained by an electromagnetically-operated escapement, one member of which is controlled by the line relay. The cam-grooves are shaped to reduce the motion of the shaft before the checking action of the escapement becomes operative, thereby reducing shock. The cam shaft may be operated through a friction coupling and a spring- coupling, in the latter of which energy is stored during the rest periods of the shaft, this energy giving the shaft a rapid movement when released. A yielding connection is placed between the camlevers of the connecting-rods and the rods to prevent stoppage or break-down of the receiver in the event of the connecting-rod ends fouling the tops of the teeth of the connecting-wheels. A similarconnection may be placed between the cam-levers of the punches and the punch-rods. The spaces between the teeth of the connecting-wheels and the ends of the connecting-rods are made V-shape to facilitate their engagement. Screws are provided to adjust the positions of the connecting- rods. A rotatable shaft n, Figs. 5 and 7, mounted upon a pin 6 and a bearing 6<a>, is provided with cam-grooves o, p which are engaged by rollers s, s<1> and r, r' respectively. The rollers s and s<1> are mounted upon levers s<2> and s<3> through which connecting-rods v and v' pass, and the movements of the levers s<2> and s<3> are transmitted to the rods v and v<1> through spiral springs 12, Figs. 5 and 11. The outer ends of the rods v, v<1> are provided with operating parts m, m<1> having V-shaped ends m<2> which engage the V-shaped spaces between the teeth of the connecting-wheels j, j<1>, Figs. 5 and 17, when the rods are moved forward by their cam-levers. The cam-rollers r and r<1> are mounted upon levers r<2>, r<3> connected respectively to rods u, u<1> carrying punches k, k<1>, Figs. 5 and 20. The punches reciprocate in hard steel bearings w mounted upon a portion a' of the frame. Hard steel die-blocks w<1> are secured to the frame a<1> and form with' it a tape guide i<1>. The tape feed-wheel i and the connecting-wheels j, j<1> are mounted upon a spindle b driven from the shaft f through worm-gearing e and a frictionclutch d. The shaft n is driven from the shaft f through gearing 11, 7 and a friction-clutch 8, 9, and is provided with a tooth 1, Figs. 6, 7 and 21, adapted to be engaged by the bifurcated end 2<a> of a lever 2. The lever 2 is oscillated by a magnet 3, Fig. 21, controlled by the line relay 4, and the end 2a moves in a slot a<2>, Fig. 6, in the casing a. Specifications 2834/01, 1061/02, 5490/05, 23834/08, 20810/11, and 165,821 are referred to.