Drop down emergency lighting unit

Details Drop down emergency lighting unit Drop down emergency lighting unit

1998-11-02

2000-12-26

O'Shea, Sandra

Illumination

Automatic substitution of power supply or light source

362250, 362286, 362288, 362386, F21V 1904

Patent

active

061647888

ABSTRACT:
A drop down concealed emergency lighting unit includes a box-like housing for substantially flush mounting in a recess and a pivotally mounted door for closing the opening in the housing and upon which is mounted a lamp unit. A drive assembly moves the door between the open and closed positions and includes a DC motor on the housing with a drive gear which is operatively engageable with a driven gear on the door to move the door to the closed position. An electrical control circuit senses the absence of alternating current and effects disengagement of the gears to allow the door to move from the closed position to the open position, and senses the restoration of alternating current to effect reengagement of the gears to actuate the motor to move the door to the closed position.

REFERENCES:
patent: 4802065 (1989-01-01), Mitner
patent: 5025349 (1991-06-01), Gow

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