Surge protector for computer equipment

Details Surge protector for computer equipment Surge protector for computer equipment

1994-11-14

1996-08-06

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361 56, H02H 322

Patent

active

055439993

ABSTRACT:
An over voltage protector for electronics equipment, such as a computer terminal, which includes first and second electrical connectors and at least one line intersecting these connectors. The protector also includes a ground which is isolated from both the connectors and the line. The line includes a resistor. The line is also connected to the protector ground via an MOV in series with a diode. With this arrangement, when a surge appears on the line the resistance on this line causes the surge to dump to ground. The diode prevents the surge from re-entering the line. The protector also includes apparatus to connect the protector ground to the building's electrical ground. This apparatus includes a grounded power cord (or grounded power cord adapter) for the equipment, a wire connected between the protector ground and the ground line of the power cord, and a capacitor and a diode connected in parallel on the ground line of the power cord for preventing any surge from entering the equipment.

REFERENCES:
patent: 3693053 (1972-09-01), Anderson
patent: 4438477 (1984-03-01), Cawley
patent: 4659161 (1987-04-01), Holcomb
patent: 4695916 (1987-09-01), Satoh et al.
patent: 4740859 (1988-04-01), Little
patent: 4862311 (1989-08-01), Rust et al.
patent: 4878145 (1989-10-01), Lace
patent: 4903161 (1990-02-01), Huber et al.
patent: 4912589 (1990-03-01), Stolarczyk
patent: 4922382 (1990-05-01), Hobbins
patent: 5010438 (1991-04-01), Brady

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