Electrical switch and circuitry for appliance

Details Electrical switch and circuitry for appliance Electrical switch and circuitry for appliance

1986-09-15

1989-05-09

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 91, 361102, 361103, 361115, 307326, 307116, 340650, 200 6108, H02H 316

Patent

active

048293903

ABSTRACT:
A safety device for disconnecting an electrical appliance from a power supply, and thereby preventing electrical shock hazards. A normally closed switch connects the appliance to the power supply. A frangible device, such as a flash bulb, maintains the switch in the closed position. A sensor detects a dangerous condition and actuates the flash bulb, which action fragments the envelope of the bulb, whereupon the switch assumes the open position, thereby disconnecting the appliance from the power supply.

REFERENCES:
patent: 3848100 (1974-11-01), Kozorezov et al.
patent: 3859482 (1975-01-01), Matsui et al.
patent: 3936621 (1976-02-01), Palin et al.
patent: 4296285 (1981-10-01), Lang et al.
patent: 4443854 (1984-04-01), Pflanz et al.

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