Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Demand – excess – maximum or minimum
Patent
1982-12-02
1985-02-26
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Demand, excess, maximum or minimum
324102, 324120, 324127, G01R 1916, G01R 1926, G01R 122
Patent
active
045020043
ABSTRACT:
An apparatus for measuring varying current levels is particularly suited to the measurement of distinct current pulses. The apparatus couples by means of an inductive sensor to a current carrying conductor. A current pulse in the conductor induces a voltage within the sensor, which is then converted by a unipolar voltage to frequency converter to a sequence of electrical pulses, the total number of which is proportionate to the peak current value of the pulse. The number of pulses produced may be displayed as a measurement of the peak current pulse; in a preferred embodiment, the apparatus compares the number of pulses to a pre-set alarm value, enabling the apparatus to signal any occurrence of current pulses over a desired value.
REFERENCES:
patent: 3201688 (1965-08-01), Ferguson
patent: 3582777 (1971-06-01), Wunderman
patent: 3631342 (1971-12-01), McDonald
patent: 4321530 (1982-03-01), Kelly et al.
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