View of Slaby’s Receiving Apparatus, with call-bell rung by relay, or with Morse instrument joined on to terminals M, and switch to change from Calling to Signalling. K K are the terminals of elevated wire and earth, and the Coherer and Tapper-back are close to them.
Fig. 46
(Fig. 17 of Prof. Slaby’s book).—
An elevation view of Prof. Slaby’s same Apparatus, showing the electromagnet and hammer of the tapper-back worked by relay current from local battery, as in Popoff’s plan of 1895.
A Morse instrument is to be connected to the terminals M, and either it or the bell can be switched into the circuit at pleasure. The form of relay depicted is special to Slaby, but the rest of the arrangements are practically identical with those shown by Marconi at Dover.
[Fig. 47] gives a diagram of the actual connections.
[Fig. 48] is a picture of one of Slaby’s signalling stations, showing the way the elevated wire enters the building.
Fig. 47
(Fig. 19 of “Spark Telegraphy”).—
Diagram of Slaby’s connections in the above apparatus. F is the coherer and K the tapper-back.