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 163
.The speed of signaling depends largely on the rapidity of the key,a wide movement greatly cutting down the eflSciency of the systemas a means of communication; therefore, short-range keys must beprovided, with some means of annulling the heavy spark on break.Man\ suggestions have been made and a… … short-circuiting resistance around the break, and others a condenserto absorb the arc. One form of Marconi key simukaneously breaksthe primary current and disconnects the aerial from the transmitting apparatus. Many keys are de-signed to cause the break totake place under oil or otherhighly…
Electrical engineering
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