High intensity discharge lamp with auxiliary light

Details High intensity discharge lamp with auxiliary light High intensity discharge lamp with auxiliary light

1974-10-08

1977-01-25

La Roche, Eugene

Electric lamp and discharge devices: systems

Automatic substitution of the load device or electrode

Diverse-type load device or electrode substituted

315 93, 315136, H05B 4146

Patent

active

040053318

ABSTRACT:
An emergency lighting system, employing a mercury lamp and an incandescent lamp, and relay circuits for turning on the incandescent lamp in substitution for the mercury lamp, when the light output of the latter is limited, during either cold start or hot start, and for turning off the incandescent lamp without chatter.

REFERENCES:
patent: 2592165 (1952-04-01), McDermott
patent: 3517254 (1970-06-01), McNamara, Jr.
patent: 3599036 (1971-08-01), Haymaker
patent: 3659146 (1972-04-01), Munson
patent: 3694692 (1972-09-01), Pressman
patent: 3699382 (1972-10-01), Franke
patent: 3737720 (1973-06-01), Willis

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