American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 391
e^ ^^ _j—-_-__^^ X^ f- Yir 1: i ii 1 i 1 -^ \ j n iSST … conductor between the rails, will induce pulsatory currents in the coil around the car,which may be broken into acts and dashes by the transmitting operator at the station^and received by the attendant in the car. The contacts on the transmitter k are so arranged that, when the key is closed,…
Telegraph
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