Self-testing grounding device

Details Self-testing grounding device Self-testing grounding device

1998-12-09

2000-10-31

Lefkowitz, Edward

Communications: electrical

Condition responsive indicating system

Specific condition

340650, 361220, 324510, G08B 2100

Patent

active

061409294

ABSTRACT:
A resistance tester is incorporated into a grounding device. The resistance tester includes a test circuit, a battery, a switch and a set of indicator devices. With the grounding device being worn and the cord end of the device in contact with the user so as to form a closed circuit, the test circuit measures the resistance level of the grounding device upon activation of the switch. The indicator devices provide a visual indication of the resistance level, i.e., too high, too low or within acceptable limits. The resistance tester is self-contained and may be used anytime by the user to ensure that the resistance of the grounding device is acceptable.

REFERENCES:
patent: 4605984 (1986-08-01), Fiedler
patent: 4638399 (1987-01-01), Maroney et al.
patent: 4736157 (1988-04-01), Betker et al.
patent: 4745519 (1988-05-01), Breidegam
patent: 5461369 (1995-10-01), Campbell et al.
patent: 5623255 (1997-04-01), Yang
patent: 5686897 (1997-11-01), Loh
patent: 5872455 (1999-02-01), Pohribnij et al.
patent: 5952931 (1999-09-01), Chotichanon et al.

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