Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Balancing
Patent
1974-09-17
1976-07-20
Rolinec, R. V.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Balancing
307202R, 317 31, 324 51, 324110, G01R 1702, G01R 136
Patent
active
039709302
ABSTRACT:
The invention relates to the supervision of a measuring circuit which is connected to a load by way of measuring leads. This load is connected to a generator via supply leads. The load is bridged by a resistor. If one of the four said leads is interrupted, the potential on one of the ends of the resistor changes. As a result, a transistor becomes conductive, which implies an error signal. In a preferred embodiment, two transistors are provided, the first transistor being rendered conductive by a voltage difference. The second transistor is rendered conductive either by a voltage difference or by the fact that the first transistor becomes conductive.
REFERENCES:
patent: 3098192 (1963-07-01), Levy, Jr. et al.
patent: 3463966 (1969-08-01), Evans et al.
patent: 3617886 (1971-11-01), Werme
Franzblau Bernard
Karlsen Ernest F.
Rolinec R. V.
Trifari Frank R.
U.S. Philips Corporation
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