Illumination – Self powered lamp – Rechargeable electrical source of with external connections
Patent
1993-06-11
1995-10-24
Husar, Stephen F.
Illumination
Self powered lamp
Rechargeable electrical source of with external connections
362296, 362293, 362802, 362803, 315159, 340321, F21L 900, F21V 900
Patent
active
054615518
ABSTRACT:
A portable drakroom safelight which incorporates several features which enhance its usefulness in a darkroom. The portable safelight includes a lamp, a safelight filter, rechargeable batteries, a light sensor, and control means. The safelight filter filters all light produced by the lamp, thus making the safelight safe for use in a darkroom and with photosensitive materials. A surface mounting bracket or stand supports the portable safelight and includes a transformer for converting household electric current into low voltage direct current suitable for use by the portable safelight. When the portable safelight is removed from the mounting bracket it automatically switches to operate from the rechargeable batteries and its illumination level is automatically reduced. The lamp is automatically turned off or on when the light sensor detects the presence or absence of ambient white light. Other features include a proximity detector for detecting the distance between the lamp and an object and a low battery charge detection means and/or battery timer. A pullout or adjustable stand or neck allows the portable safelight to be easily pointed in any direction or moved to different locations.
REFERENCES:
patent: 3056332 (1962-10-01), Beregowitz
patent: 3080491 (1963-03-01), Howell
patent: 3393312 (1968-07-01), Dahl
patent: 3405262 (1968-10-01), Dolan et al.
patent: 3971929 (1976-07-01), Erdell
patent: 4605993 (1986-08-01), Zelina, Jr.
Husar Stephen F.
Quach Y.
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