Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1984-06-18
1987-03-31
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 61R, 324DIG1, 29705, G01R 3102, B23P 2100
Patent
active
046545808
ABSTRACT:
Electrical continuity between an electrical terminal and a metal core of an insulated electrical lead is tested for, by supplying substantially identical oscillatory signals to the arms of a two-arm bridge circuit, the arms of which are connected to respective inlets of a differential amplifier, the arms being grounded through capacitances and a ground plane existing in the vicinity of the lead. If there is electrical continuity between the terminal and said core, the capacitance between the core and the ground plane causes imbalance between the signal inputs that are applied by the bridge circuit to the differential amplifier to cause it to emit a continuity success signal.
REFERENCES:
patent: 3275933 (1966-09-01), Dranetz
patent: 3757211 (1973-09-01), Goto
patent: 3829850 (1974-08-01), Guetersloh
patent: 3879660 (1975-04-01), Piso
patent: 4110880 (1978-09-01), Peppler et al.
patent: 4157541 (1979-06-01), Harwell
patent: 4159158 (1979-06-01), Weilder
patent: 4173736 (1979-11-01), Adams
patent: 4187504 (1980-02-01), Cantrell
AMP Incorporated
Eisenzopf Reinhard J.
Harvey Jack B.
Terrell Thomas G.
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