Electrical World

Electrical World

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This apparatus resembles an ordinary spark coil, being a wooden case of about the same size. Inside ... Under the cap is a small pellet of high resistance material which serves the purpose of an air-gap in series with the spark-gap. ... sets of from 3 kw to 6 kw, for lighting and power service generally, with Holtzer-Cabot generators and Apple ignition dynamos. ... An automobile and motor-boat sparker and charging board of pocket size were also shown, equipped with a plug switch, andanbsp;...


Title:Electrical World
Author:
Publisher: - 1909
ISBN-13:

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