Self-relamping clearance/marker light assembly

Details Self-relamping clearance/marker light assembly Self-relamping clearance/marker light assembly

1989-06-14

1991-03-05

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Automatic substitution of the load device or electrode

With current shifting switch

315307, 315135, 315 77, 340642, H05B 3910

Patent

active

049980424

ABSTRACT:
A self-relamping clearance/marker light assembly includes a pair of lamps connected to a proving ring switch. A primary one of the almps is lighted and the switch prevents current flow through a secondary one of the lamps until the primary lamp burns out. The lamps are operated at a derated voltage to increase life and a small compensating lamp provides the necessary additional illumination lost through the reduced voltage operation of the primary and secondary lamps. The lamps are mounted for isolation from high frequency vibration and shock impacts using the lamp lead wires to form part of the shock mounting.

REFERENCES:
patent: 1404890 (1922-01-01), Patten
patent: 1869091 (1932-07-01), Brander
patent: 1938828 (1933-12-01), Gordon
patent: 1972514 (1934-09-01), Engelhard
patent: 1983308 (1934-12-01), Ricker
patent: 4380718 (1983-04-01), Miller
patent: 4712051 (1987-12-01), Fathi

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