Motor vehicle rear lighting system

Details Motor vehicle rear lighting system Motor vehicle rear lighting system

1975-04-30

1976-05-18

Mullins, James B.

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Multiple filament load devices

315 67, 315 69, 315 77, H01J 744

Patent

active

039581497

ABSTRACT:
A motor vehicle rear lighting system comprises first and second lamp filaments in a single bulb envelope, the first lamp filament having a greater resistance than that of the second lamp filament. One or more electrical switches are operable, in one position, to connect the lamp filaments in series with a battery, and, in another position, to complete the circuit from the battery to the second lamp filament without the first lamp filament in series therewith. The arrangement is such that, in said one position of the one or more switches, the first lamp filament becomes luminous and, in said another position of the switch means, the second lamp filament becomes luminous. In one embodiment, a first lamp filament by-pass is provided and, in said another position of the electrical switch, the circuit to the second lamp filament is completed via the by-pass. In another embodiment, the electrical switches are arranged to connect the lamp filaments in parallel when the switches are in their said another position.

REFERENCES:
patent: 3244934 (1966-04-01), Webb
patent: 3349280 (1967-10-01), Siiberg
patent: 3638068 (1972-01-01), Wilson

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