Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With coupling means
Patent
1975-11-10
1977-03-08
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With coupling means
307235N, 324 51, 324133, 324140R, 328151, G01R 1916, G01R 3102
Patent
active
040115070
ABSTRACT:
A circuit for detecting whether current flowing in an external circuit is zero or constant d.c., or is varying in amplitude or, in particular, alternating. A voltage is induced in the detection circuit in response to current flowing in the external circuit, and is compared to a preselected threshold voltage range by a plurality of voltage comparators. The output signal from the comparators is stored in a flip-flop, which generates a signal along a first path if the comparator output indicates that the induced voltage is within the preselected range, thereby indicating zero d.c. or constant d.c. current in the external circuit, or along a second path if the comparator output indicates that the induced voltage is outside the preselected range, thereby indicating varying d.c. or a.c. current in the external circuit.
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patent: 3815011 (1974-06-01), Milkovic
Burroughs Corporation
Gaybrick Robert J.
Jordan Richard A.
Peterson Kevin R.
Strecker Gerard R.
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