Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1979-06-21
1980-12-16
Moore, David K.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 52, 324425, G01R 312
Patent
active
042400260
ABSTRACT:
Faults, such as pinholes, in the insulation of an electrical conductor are detected by passing the conductor through a liquid electrolyte which acts as a liquid electrode. A regulated DC supply is connected to the electrolyte, the conductor core grounded, and the DC bias to the electrolyte monitored. Any variation in the DC bias, is detected and for any change over a predetermined minimum value a signal is produced, which can be used to actuate a marker or stop the line. More than one conductor can pass together, for example twisted pairs or quads as used for telecommunications.
REFERENCES:
patent: 3349324 (1967-10-01), Wakefield
patent: 3820011 (1974-06-01), Hoveman
patent: 3970924 (1976-07-01), Pendleton et al.
Dionne Yvon O.
Kral Jerry J.
Murphy Peter
Stefaniszyn John
Jelly Sidney T.
Moore David K.
Northern Telecom Limited
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