Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 116
hown in Fig. 117where a number of heavy copper plates separated by fiber insulating washersmicanite, or other insulating material, are placed in an iron rack and compressedby means of a pressure bolt. The thickness of the washers is chosen so that thespace between the sparking surfaces of a single… … Fig. 117—Modern Quenched Spark Discharger with Motor Blower. soon cause a short circuit. The insulating washers are specially treated so thatthe discharge surface is airtight. This not only aids in quenching out the primaryoscillations, but gives a noiseless discharge as well. It will be noted from…
Telegraph, Wireless
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