Visual indicator electrical plug-type surge protector and system

Details Visual indicator electrical plug-type surge protector and system Visual indicator electrical plug-type surge protector and system

1989-03-09

1990-03-06

Deboer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361 58, 361111, 361127, 340653, 340662, 374162, 337 28, 337265, 337243, H02H 904

Patent

active

049071181

ABSTRACT:
An inexpensive, compact, portable, visual indicator electrical plug-type surge protector which comprises an electrical plug body composed of a molded transparent polymer, the plug body having an extended male grounding prong and a pair of male electrical prongs on one face and a female receiving grounding inlet and a pair of female receiving inlets on the opposite face. The plug body contains in a visually indicating position, generally slightly below the surface of the plug body, a metal oxide varistor electrically connected to the electrical outlet plug so as to prevent electrical surges from passing through the surge protector from the electrical source into which the electrical plug-type surge protector is plugged and to be activated and to change color on the occurrence of an electrical surge so that the user of the surge protector will know when the electrical surge has been received and thereby be able to replace the surge protector with a new surge protector. Visual indicating surge protectors are designed to be plugged in to standard electrical apparatus or other sensitive electronic device which is to be protected from electrical surges.

REFERENCES:
patent: 3184726 (1965-05-01), Hellgren
patent: 3877411 (1975-04-01), MacDonald
patent: 3890030 (1975-06-01), McDaniel
patent: 4127837 (1978-11-01), Borchart
patent: 4739439 (1988-04-01), Stefani et al.
patent: 4743999 (1988-05-01), Haines
patent: 4807083 (1989-02-01), Austin
patent: 4829539 (1989-05-01), Angus et al.

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