Thermal protector/resistor combination

Details Thermal protector/resistor combination Thermal protector/resistor combination

1989-05-17

1990-10-16

Pascal, Robert J.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315362, 361 57, 361103, H05B 3702

Patent

active

049637975

ABSTRACT:
A ballast assembly has a thermal circuit protector with a resistor mounted in close proximity, for protecting multiple coils in a ballast assembly. The thermal circuit protector is included in the assembly, connected in series with a first coil. The resistor is connected in series with a second coil, with the resistor sized to produce sufficient heat during a high current draw condition to actuate a bimetallic switch within the adjacent protector, thereby interrupting power to the ballast assembly and preventing damage without requiring a second thermal circuit protector.

REFERENCES:
patent: 2246890 (1941-06-01), Miller
patent: 3116437 (1963-12-01), Harvey
patent: 3188592 (1965-06-01), Kulka
patent: 3649942 (1972-04-01), Plasko
patent: 3839692 (1974-10-01), Plasko
patent: 4636910 (1987-01-01), Chadwick

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