Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural inputs
Patent
1994-04-18
1996-07-16
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural inputs
324142, G01R 700
Patent
active
055370284
ABSTRACT:
An electricity meter and method for measuring VA power consumption. The electricity meter comprises a transducer circuit receiving line current and line voltage and producing a first signal corresponding to active power on the line, and a level shifting circuit responsive to the first signal for producing a second signal corresponding to apparent power.
REFERENCES:
patent: 4174499 (1979-11-01), Waurick
patent: 5124624 (1992-06-01), de Vries
"Electronic Devices + Circuits" M. S. Ghausi p. 239 CBS College Publishing 1985.
"The Art of Electronics" Paul Horowitz p. 625 Cambridge Univ. Press 1989.
Karlsen Ernest F.
Kobert Russell M.
Schlumberger Industries Inc.
Smith K. G. W.
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