Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Meter protection or fraud combatting
Patent
1988-08-31
1990-02-13
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Meter protection or fraud combatting
324142, 324156, 439304, G01R 104, H01R 1352
Patent
active
049010077
ABSTRACT:
A portable electrical energy monitor for measuring the electrical energy usage of an appliance or the like is disclosed. The monitor includes an enclosure having a cover for opening and closing the enclosure. An electrical measurement device or circuit is positioned within the enclosure and includes a receptacle plug for complementary interconnection to a receptacle plug of an appliance, also to be received within the enclosure. The cover of the enclosure is closed when the appliance receptacle plug is operatively interconnected to the receptacle plug of the electrical measuring device or circuit. A visual display device is connected to the electrical measuring device and is mounted to the enclosure for visual display of electrical energy usage of an interconnected appliance. The electrical measuring device or circuit includes a sensing circuit for sensing an electrical condition emanating from an appliance, a switching device energized by the sensing circuit, and an adjustment device which establishes a predetermined electrical condition level from an appliance which is necessary to energize the switching device.
REFERENCES:
patent: 2010047 (1935-08-01), Green
patent: 2099761 (1937-11-01), Sutherlin
patent: 4479688 (1984-10-01), Jennings
patent: 4593541 (1986-06-01), Hollis
patent: 4603931 (1986-08-01), Ruffman
patent: 4674304 (1987-06-01), Guiler
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