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 101
American JMorse code is used, there is nosimple means of operating automatic punches to punch tape for the Continental Morse codewhich is used over all subma-rine cables. Cable Recorders. Thefirst receiving ai)paratus usedcommercially on submarinecables was not, strictly speak-ing, a recorder, for… … Fig. 57. Mallet Ilund-Operatcd Tape Punch 84 MODERN LAND AND SUBMARINE TELEGRAPHY 75 Spark Recorder. The first real recorder, known as the sparkrecorder, may be regarded as the forerunner of the siphon recorder.The spark recorder consisted of a sensitive galvanometer with ametalhc pointer arranged…
Electrical engineering
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