Improvements in Telegraphic Transmitters

1416. Price, S., Phillips, W. P., and Weiny, R. H. Jan. 18. Telegraphs.-Transmitters for composing a message on an endless chain or on a disc provided with sliding pins. The chain passes over two drums, one intermittently driven and the other continuously driven at a suitable speed. The Figure shows a side elevation of the apparatus. The pivoted key levers K E', K' E', &c. are arranged in banks, and are provided with combinations of wedges 1, 2, 3 corresponding to the elements of each code signal. SK is a spacing- key. The wedges operate individual members of a series of rocking levers R -R , the lower ends K -K of which operate plungers P -P so arranged as to push the sliding pins P of the chain whilst in its position of rest on the intermittentlydriven drum. The sliding pins P are provided with hooked projections c, which act a s limiting stops and also as means for operating the contact -levers. Each pin can occupy four positions depending upon the wedges attached to the keys, the positions producing a space, dot, dash, or a stop in the signal. M is a frame passing under the keys and operates through a link L a detent mechanism for starting or locking the intermittent running drum. A double lever mounted on an oscillating shaft causes a lever on the same shaft to make the necessary contacts with a stop, the lever and stop being connected to terminals P, B P . Guidesprings are employed for releasing the springs from the drums, and a spring X restores all the pins P to their normal position after the signal has been completed. W is the driving-pulley connected to the drums through frictional and other gearing, and R F is the regulating-fan for setting the continuouslyrunning drum at the required speed.