Fire-prevention electrical wiring device

Details Fire-prevention electrical wiring device Fire-prevention electrical wiring device

1988-07-25

1990-02-20

Jennings, Derek S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

307117, H02H 504

Patent

active

049031627

ABSTRACT:
In a preferred embodiment, a receptacle having multiple electrical outlets includes in the main electrical inlet in electrical series with each of the electrical outlets, a heat-sensitive circuit-breaking element characterized as breaking of electrical circuit passed therethrough when the flow of current exceeds a predetermined amperage, as responsive to increased heat of resistance or other surrounding environmental heat, and as reestablishing circuitry when temperature has cooled-down to at-least a circuit-breaking temperature, there being preferably included in circuit with the circuit-breaking element a conventional electrical time delay element characterized by delaying reestablishing circuitry therethrough whenever circuitry has been broken, with a time delay of sufficient length to permit a cooling of circuitry to a point below circuit-breaking temperature of the circuit-breaking element, to prevent fire hazard from overheated old and/or inadequate house-wiring or insulation thereof.

REFERENCES:
patent: 1729109 (1929-09-01), Haskins
patent: 1762969 (1930-06-01), Farrington
patent: 3036263 (1962-05-01), Hallas
patent: 3668597 (1972-06-01), Nomura
patent: 3842328 (1974-10-01), Supel et al.
patent: 3911325 (1975-10-01), Plasko
patent: 3987342 (1976-10-01), Bird et al.
patent: 3997820 (1976-12-01), Hatefani
patent: 4131868 (1978-12-01), Dombrowski et al.

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