Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 183
ess than 1 j/^ in. from the gas piping,except where purposely grounded. SIGN FLASHERS 871 High Speed Flashers.—Machines of this type are used forgiving what is generally known as high speed effects, such asfountains, water, steam, smoke and fire effects, whirling borders,revolving wheels and work… … Pig. 1,019.—DuUs high speed flasher. It is mounted on a slate base 12 inches wide, the lengthbeing governed by the size of the machine. Motion is given to the rotary switches throughworm and belt gearing. Iron cams are used, the current being taken therefrom by six-leafbrushes, provided with…
Electrical engineering
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