Fred Locke insulator pin with porcelain base
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[Trade Journal] Publication: Western Electrician Chicago, IL, United States |
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High Potential Pin.
The call for a heavy pin, designed especially to carry heavy cables and in every way perfectly insulate them, has been met by the invention of Fred M. Locke of Victor, N. Y., shown in the accompanying illustration. The total length of. pin is 10 inches, having a one-half inch bolt running through a wood top five inches long, which is made of selected oak thoroughly dried and then saturated with paraffine. As a base to this top there is a porcelain insulator, three inches and a half long. This device has been adopted by the Southern California Power company of Redlands, Cal., which operates the longest street railway line in America, and also carries the highest pressure, 33,000 volts. It is claimed for this device that it will safely carry 50,000 volts.
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