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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 100

An illustration from 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, leaf 100
ated keys and by automatic machine transmitters. Hand-operated keys, Fig. 55, are used for rush mes-sages where the additional time required toprepare the perforated tape necessary for auto-matic transmission would cause serious delay.As an illustration of the speed sometimes de-manded, it is… … HaiRl (:< 88 74 MODERN LAND AND SUBMARINE TELEGRAPHY

Electrical engineering

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