Fire-safe halogen torchiere lamp

Details Fire-safe halogen torchiere lamp Fire-safe halogen torchiere lamp

1997-06-10

1998-09-01

Pascal, Robert J.

Electric lamp and discharge devices: systems

With load device temperature modifier

Load device circuit controlled by the temperature modifying...

315119, 315158, 362248, 362410, 362418, 250214AL, H01J 724

Patent

active

058014900

ABSTRACT:
A halogen torchiere lamp comprises a grid-like guard arranged across the lampshade opening for preventing flammable material from making contact with the hot glass shield of the bulb or the bulb itself. A temperature sensor is installed within the lampshade near the bulb to sense the rise in ambient temperature within the lampshade should its opening be covered by any material. The sensor comprises a thermostat that de-energizes the bulb when the sensed ambient temperature reaches a predetermined value. The sensor may also comprise a thermistor that operates the dimmer switch of the lamp to dim the bulb when the sensed ambient temperature reaches a predetermined value. The sensor may further comprise a photocell-powered thermistor that varies the bias of a transistor, which in turn causes the bulb to dim, thereby lowering the ambient temperature within the lampshade.

REFERENCES:
patent: 4658129 (1987-04-01), Fan
patent: 4851645 (1989-07-01), Wolf et al.
patent: 4930054 (1990-05-01), Krebs
patent: 5221141 (1993-06-01), Swanson
patent: 5620247 (1997-04-01), Swanson

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