Static grounding and monitoring accessory

Details Static grounding and monitoring accessory Static grounding and monitoring accessory

1987-02-17

1989-05-09

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

340649, 324508, G08B 2100

Patent

active

048292893

ABSTRACT:
Electrical monitoring circuitry simultaneously and continuously tests a three-wire ground-type AC outlet for proper line voltage, polarity of the wiring and external ground resistance. The circuitry includes a single indicating lamp, preferably a light-emitting diode, which illuminates only when the proper conditions tested for exist at the outlet. For optimum convenience, the circuitry is incorporated in a male/female outlet adaptor which, in use, is plugged into the wall outlet to be tested, thereby to establish via the phase, neutral and ground prongs of the adaptor the necessary test connections of the circuitry to the wall outlet. The adaptor includes one or more jack receptacles internally connected to the adaptor ground prong for receiving static charges from external equipment and draining same to the building ground when the light-emitting diode illuminates.

REFERENCES:
patent: 4089032 (1978-05-01), Dell Orfano
patent: 4118690 (1978-10-01), Paynton
patent: 4484185 (1984-11-01), Graves
patent: 4714914 (1987-12-01), Boe

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