Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 145
tube in order to restore its receptiveness aftereach and every signal. Such a device was used l)y Lodge and isknown as a tapper. It is generally in the form of an electrictrembling mechanism, such as an electric bell, operated by a localbattery when thrown into the circuit by a Morse relay—the… … Fig. 14. Marconi Capacity Areas about 4 centimeters long and 2.5 millimeters in diameter, into whichwere tightly fitted two silver terminals separated to a distance of onemillimeter, this space being filled with a powdered mixture of 96parts nickel to 4 parts silver, worked up with a trace of…
Electrical engineering
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