Retractable light fixture

Illumination – Supports – Electromagnetic operator controls movable light support

Patent

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Details

3621531, 362286, 362364, F21S 100

Patent

active

051445425

ABSTRACT:
A retractable light fixture apparatus has a housing having sides and a bottom and having an open end covered by a cover and having a lamp and reflector attached to the cover. An electrically actuated lamp solenoid is attached inside the housing and has a solenoid arm attached to the cover and lamp for raising the lamp and cover from inside the housing when the solenoid is in an extended position and for lowering the lamp and cover back onto the housing when the lamp solenoid arm is lowered. An electrical conductor is connected from an electrical power source to the lamp solenoid and to the lamp for powering the lamp and solenoid. The solenoid has a casing having a coil attached therearound for at least a portion of the length of the casing for generating a magnetic field in the casing for driving a slidable piston having the extendable solenoid arm attached to one end thereof. The solenoid arm latching system holds the solenoid arm in an extended position and includes a solenoid arm guide and stop member placed in one end of the solenoid casing and having a coil formed therearound to produce an electrical magnet in the stop member for holding the solenoid arm in an extended position when the solenoid slidable piston is adjacent to the stop member. The solenoid slidable piston is positioned to also act as a damper during the raising and lowering of the cover and lamp while the solenoid stop member also acts as a guide for centering the solenoid arm.

REFERENCES:
patent: 5003441 (1991-03-01), Crowe et al.
patent: 5075834 (1991-12-01), Puglisi

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