Illumination – Photographic lighting – Including specific light modifier
Patent
1978-04-25
1980-02-05
Lechert, Jr., Stephen J.
Illumination
Photographic lighting
Including specific light modifier
362 18, 362283, 362310, 362322, 362396, G03B 1502
Patent
active
041875311
ABSTRACT:
A luminaire includes a rectangular casing having side walls extending forwardly from a rear wall. A hand grip is adjustably secured to one side wall so that the casing can be held in one hand of a user, and a shaft is rotatably mounted in the casing and projects outwardly through such one side wall. A handle is secured to the projecting end of the shaft, adjacent the hand grip. A lamp socket is mounted on the shaft intermediate its ends and a lamp is mounted upright in the socket. A reflector assembly is interchangeably mounted in the casing and includes a small diameter inner parabolic reflector, a large diameter outer parabolic reflector coaxial with the inner reflector, and a transition zone interconnecting the reflectors. The reflector assembly has a relative elongated slot therein receiving the lamp socket for swinging of the upright lamp, about the axis of the shaft by operation of the handle, between an inner position, in which the lamp, in cooperation with the inner parabolic reflector, provides a "broad" or "wide angle" flood light, and an outer position in which the lamp, in cooperation with the inner and outer parabolic reflectors, which have different focal lengths, provides a concentrated spot light.
REFERENCES:
patent: 3851164 (1974-11-01), Intrator
Lowell Ross
Seligman Marvin H.
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