Electric lamp and discharge devices: systems – Time-controlled
Patent
1982-05-28
1984-10-02
Dixon, Harold
Electric lamp and discharge devices: systems
Time-controlled
315200R, 315207, 315208, 362100, H05B 3702
Patent
active
044750676
ABSTRACT:
A device for illuminating the area surrounding a door lock or other relatively small area includes in a preferred embodiment a housing that is mounted on the door or other surface adjacent the area to be illuminated, the housing having a translucent portion through which an electrically energized lamp emits light. The lamp is energized by a battery connected thereto by an electronic circuit having a time-delay sub-circuit for de-energizing the lamp at the expiration of a prescribed time period. The time-delay sub-circuit further includes a means for varying the period of time that the lamp is energized.
REFERENCES:
patent: 3965465 (1976-06-01), Alexander
patent: 4293894 (1981-10-01), Blank
patent: 4339696 (1982-07-01), Jabor
patent: 4389599 (1983-06-01), Jabor
Dixon Harold
Rhodes Charles R.
Smith Judith G.
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