A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 272
owth or Expan-sion of) Guard, Fan -A wire netting placed around the fan of an electric motor for thepurpose of preventing its revolving armsfrom striking external objects. Guard, Lightning- A term some-times used for lightning rod. (See Rod, Lightning.) Guard, Transformer, Lightning — A transformer… … Fig. 28Q. Wire Shade Guard. Gutta-Percha.—A resinous gum obtainedfrom a tropical tree, and valuable electricallyfor its high insulating powers. Gutta-percha readily softens by heat, but on cooling becomes hard and tough. Unlike India-rubber, it possesses but little elasticity. Itsspecific inductive…
Electricity · Electrical engineering
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