The standard electrical dictionary : a popular encyclopaedia of words and terms used in the practice of electrical engineering (1898)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · London : Crosby Lockwood and Son · leaf 439
s really contact action,not pressure action. Primary. A term used to designate the inducing coil in aninduction coil or transformer ; it is probably an abbreviation forprimary coil. Primary Battery. A voltaic cell or battery generating electricenergy by direct consumption of material, and not… … Fig. 273. Prime Conductor and Proof Plane. Prime Conductor. A metal or metal coated sphere or cylinder STANDARD ELECTRICAL DICTIONARY. 435 or other solid with rounded ends mounted on insulating supportsand used to collect electricity as generated by a frictional electricmachine. According to…
Electricity
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