Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With coupling means
Patent
1983-04-18
1986-04-22
Levy, Stewart J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With coupling means
324 725, 324105, G01R 1900, G01R 1067
Patent
active
045845255
ABSTRACT:
A system for measuring currents flowing through a conductor uses the current-carrying conductor itself as the measurement shunt. The voltage developed across the inherent resistance of a fixed length of current-carrying conductor is measured and scaled to provide a displayable voltage of magnitude equal to the magnitude of current flowing in the conductor. Compensation for conductor temperature rise can be utilized, as can a multimeter accommodating various conductor materials and/or sizes.
REFERENCES:
patent: 720335 (1903-02-01), Eastman
patent: 2362372 (1944-11-01), Halfmann
patent: 3037161 (1962-05-01), Cummings
patent: 3617870 (1971-11-01), Howes
patent: 4186339 (1980-01-01), Finger
patent: 4295475 (1981-10-01), Torzala
Carr, J., "Digital Interfacing with an Analog World", First ed., 1978, pp. 79-81.
Amman, S., "Noise-Proofing a Digital Voltmeter with Off-the-Shelf Microelectronics", Electronics, Nov. 16, 1964, pp. 92-96.
Bloomer Milton D.
Harnden, Jr. John D.
Rocha Henry A. F.
Baker Stephen M.
Davis Jr. James C.
General Electric Company
Krauss Geoffrey H.
Levy Stewart J.
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