Locke insulators

NEW

Apparatus

AND

Appliances.

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HIGH VOLTAGE LINE INSULATOR.

High voltage electrical transmission has given rise to a demand for line insulation vastly superior to what had previously been found sufficient, and the insulator illustrated herewith has been designed to supply this requirement.

The insulator is made of porcelain, with a separate center insulating attachment of either glass or porcelain. The construction is both mechanically and electrically strong throughout, remarkably good results having been achieved in transmitting large currents for long distances at a pressure of 15,000 volts. At a recent test these insulators on the Locke steel pin carried 70,000 volts for four hours without heating, arcing or breaking down. This test showed conclusively that this combination of glass and porcelain offers a very high resistance to puncture and surface leakage.

High Voltage Insulator.

These insulators have over 12 ins. of surface between the wire contact and the supporting pin. About 10 ins. of this surface is on the under side of the insulators out of reach of direct rainfall, where it keeps comparatively dry. The surfaces of the bottom of the insulators are perpendicular, and, therefore, catch no foreign matter. Locke's steel insulating pin, the top of which is made of locust wood boiled in paraffine, is designed to be used with these insulators.

The above described insulator is made by Fred. M. Locke, Victor, N. Y.

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