Illumination – Plural light sources – Source and modifier mounted for relative movement
Patent
1982-09-07
1985-08-06
Brown, David H.
Illumination
Plural light sources
Source and modifier mounted for relative movement
362106, 362184, 362188, 362191, 362197, 362233, 362238, 362250, 362271, 362284, 362288, 362289, 362306, 362324, 362372, 362419, F21V 2114, F21L 1520, F21S 500
Patent
active
045339848
ABSTRACT:
A variable-width-beam light apparatus is provided having a lamp and reflector assembly in which a lamp is supported for selective axial displacement along a longitudinal optical axis with respect to a focal point of the reflector to enable adjustment in the width or angle of divergence of an emitted beam of light. The lamp is selectively positioned by a rotatable knob carried by a lens of the assembly and positioned exteriorly at the front of the lens for operation. The rotatable knob connects with a shaft coupled by screw threads with a lamp engaging cylinder that is axially slideable in a tubular guideway such that rotational movement is translated to longitudinal movement to effect and control axial displacement of a lamp. The lamp is resiliently biased in a forward direction with respect to the lens. The lamp and reflector assembly is supported in a housing on journals permitting selective angular positioning of the assembly about an axis disposed transversely to the longitudinal optical axis of the reflector to direct the light beam in a selected direction with respect to the housing. A modification includes two lamp and reflector assemblies incorporated into a unitary structure and mounted for relative rotation in a housing about a single axis.
REFERENCES:
patent: 1514869 (1924-11-01), Solosabal et al.
patent: 1682567 (1928-08-01), Hobbie
patent: 1682608 (1928-08-01), Dressel
patent: 2071159 (1937-02-01), Benjamin
patent: 2874269 (1959-02-01), Greenlee
patent: 2906862 (1959-09-01), McCammon
patent: 2947851 (1960-08-01), Lozeau
patent: 3439160 (1969-04-01), Andreaggi
patent: 3538324 (1970-11-01), Hankins
patent: 3886350 (1975-05-01), Katsukura et al.
patent: 4025777 (1977-05-01), Hayakawa
patent: 4090232 (1978-05-01), Golden
patent: 4190880 (1980-02-01), Esaki
patent: 4199802 (1980-04-01), Malm
patent: 4214295 (1980-07-01), Morton
patent: 4263588 (1981-04-01), Gautier
patent: 4319308 (1982-03-01), Ippoliti et al.
patent: 4327403 (1982-04-01), Aubrey
patent: 4336579 (1982-06-01), Lord
patent: 4352150 (1982-09-01), Hosoda
Brown David H.
Griffiths John E.
Stebens Robert E.
LandOfFree
Variable-width-beam light apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable-width-beam light apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable-width-beam light apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-516104