Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With coupling means
Patent
1975-04-10
1976-12-28
Rolinec, R. V.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With coupling means
324132, 324133, 340253A, G01R 1510, G01R 1914
Patent
active
040004627
ABSTRACT:
Disclosed is the physical construction and electrical control circuit of a fault indicator designed to provide a watertight structure for the indicator. One face of the indicator is visible through the sealing apparatus, the sealing apparatus enclosing the structure on all sides other than the indicator face side. The indicator is capable of being submerged and will withstand a water pressure of 8 psig to meet specifications established by electric utilities. The electrical control circuit normally causes the transformer to operate below its saturation level resulting in quick response to changes in input current, and providing improved temperature stability of the control circuit.
REFERENCES:
patent: 2198371 (1940-04-01), Wolferz et al.
patent: 3253215 (1966-05-01), Moakler et al.
patent: 3281689 (1966-10-01), Schneider et al.
patent: 3621392 (1971-11-01), Liebermann
Boyd Robert Kent
Lindberg Allan Walter
International Telephone and Telegraph Corporation
Karlsen Ernest F.
Michals William J.
Raden James B.
Rolinec R. V.
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