Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Nonquantitative
Patent
1975-03-26
1977-01-25
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Nonquantitative
307235T, 324 51, 340248A, G01R 3102, G01R 1914, G01R 1916
Patent
active
040053652
ABSTRACT:
A device including a voltage indicator circuit has the capability of indicating positive, neutral and negative voltages with respect to a reference voltage. Three indicator circuits are mounted on a single substrate. Each indicator circuit energizes a respective light emitting diode to indicate whether a voltage applied to a probe is positive, neutral or negative with respect to a reference voltage. The reference voltage is applied to a ground or reference terminal on the circuit. An alternating voltage is indicated by rendering effective all three light-emitting diodes. An open circuit can be ascertained by the absence of a positive signal from all the diodes.
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Czechlewski et al. Pulse and Level Detector Circuits, Western Electric Technical Digest No. 35, July 1974, pp. 11-13.
Berger Robert L.
Hailey William H.
Mallick, Jr. George
Mannbeck Donald H.
Weight Wilber J.
Schellin W. O.
Strecker Gerard R.
Western Electric Company Inc.
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