Electrical circuit tester selectively responsive to either prese

Details Electrical circuit tester selectively responsive to either prese Electrical circuit tester selectively responsive to either prese

1982-04-01

1988-02-16

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Conductor identification or location

324133, 324555, 324508, 340654, G01R 19145

Patent

active

047257725

ABSTRACT:
A self-contained unit intended primarily for tracing the circuit connection between electrical outlets and a circuit-breaking connection thereof to an AC power source. The unit includes a housing containing batteries, a buzzer or other sound-producing means, an AC relay and a switch for selective placement in either of two positions. An electrical cord extends from the housing and terminates in a male plug for insertion in a receptacle of the circuit to be traced. By placing the switch in its first position the buzzer will sound when the AC power is supplied to the receptacle; placing the switch in its second position will cause the buzzer to sound when AC power, initially present, is removed from the receptacle. A second embodiment adds to the foregoing the capability of testing unpowered circuits for continuity between two conductors by incorporating an additional selectively positioned switch.

REFERENCES:
patent: 3416074 (1968-12-01), Scheonover
patent: 4001803 (1977-01-01), Lombardo
patent: 4015201 (1977-03-01), Chaffee
patent: 4027236 (1977-05-01), Stewart
patent: 4041380 (1977-08-01), Epstein
patent: 4097843 (1978-06-01), Basile
patent: 4169357 (1979-10-01), Kelley
patent: 4176315 (1979-11-01), Sunnarberg
patent: 4233560 (1980-11-01), Blenman
patent: 4259635 (1981-03-01), Triplett
patent: 4356442 (1982-10-01), Beha
Todd, "A Sub-Ohm Continuity Tester" Electronics World Feb. 1969, pp. 78-80.

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