Emergency light

Details Emergency light Emergency light

1979-01-15

1980-08-19

Lechert, Jr., Stephen J.

Illumination

Automatic substitution of power supply or light source

362183, F21V 1904

Patent

active

042187257

ABSTRACT:
An emergency light unit is disclosed in which a relay controlled low voltage bulb is initially responsive to line voltage and alternately responsive to battery voltage. A test switch is included to permit instant determination of line voltage and battery status.

REFERENCES:
patent: 2478129 (1949-08-01), Powell

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