[Trade Journal]
Publication: Electrical World
New York, NY, United States
vol. XXXII, no. 7, p. 170, col. 2
Triple Petticoat Insulator.
The insulator of which the accompanying illustration is a sectional view is built up from three shells of vitrified china fused together with glaze. The pin has a porcelain base, which enormously increases the resistance between the cross-arm and insulator. It would be manifestly inconsistent to increase the insulating qualities of the insulator itself and not make a corresponding improvement in the insulation between the insulator and the supporting cross-arm. This, however, is completely provided for in this insulator by make the pin base of porcelain.
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| Triple Petticoat Insulator. |
Mr. Fred. M. Locke, Victor, N. Y., manufactures these triple-petticoat insulators in various sizes for potentials, varying from 5000 to 50,000 volts.
