US4187531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting arrangement for photographic work including combined spot and flood light luminaire
Assignee: Individual
•
Filing: 1978-04-25
•
Granted: 1980-02-05
•
Expires: 1998-04-25
Abstract
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.
Inventors
- 👤 Ross Lowell
- 👤 Marvin H. Seligman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:11
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
248 words
A combined spot and flood light luminaire, for photographic work, arranged to be either held in one hand or mounted on a suitable support and to have photographic accessories mounted thereon, said luminaire comprising, in combination, a casing; a hand grip adjustably secured to said casing whereby said casing can be held in one hand of a user; a shaft rotatably mounted in said casing and projecting outwardly thereof; a handle secured to the projecting end of said shaft adjacent said hand grip for operation by the same hand gripping said hand grip; a lamp socket mounted on said shaft intermediate its ends; a lamp mounted upright in said socket; a reflector assembly mounted in said casing and including a small diameter inner parabolic reflector, a large diameter outer parabolic reflector coaxial with said inner reflector, and a transition zone interconnecting said reflectors; said reflector assembly having a relatively elongated slot therein receiving said lamp socket for swinging of said upright lamp, about the axis of said shaft, by operation of said handle, between an inner position, in which said lamp, in cooperation with said inner parabolic reflector and also with said outer reflector, for maximum intensity, provides a broad or wide angle flood light, and an outer position, in which said lamp, in cooperation primarily with said outer reflector, provides a concentrated spot light; and mounting means on said casing for mounting said luminaire on a supporting post and for mounting of photographic accessories on said luminaire.
Claim 2
Dependent Claim
248 words
A combined spot and flood light luminaire, for photographic work, arranged to be either held in one hand or mounted on a suitable support and to have photographic accessories mounted thereon, said luminaire comprising, in combination, a casing; a hand grip adjustably secured to said casing whereby said casing can be held in one hand of a user; a shaft rotatably mounted in said casing and projecting outwardly thereof; a handle secured to the projecting end of said shaft adjacent said hand grip for operation by the same hand gripping said hand grip; a lamp socket mounted on said shaft intermediate its ends; a lamp mounted upright in said socket; a reflector assembly mounted in said casing and including a small diameter inner parabolic reflector, a large diameter outer parabolic reflector coaxial with said inner reflector, and a transition zone interconnecting said reflectors; said reflector assembly having a relatively elongated slot therein receiving said lamp socket for swinging of said upright lamp, about the axis of said shaft, by operation of said handle, between an inner position, in which said lamp, in cooperation with said inner parabolic reflector and also with said outer reflector, for maximum intensity, provides a broad or wide angle flood light, and an outer position, in which said lamp, in cooperation primarily with said outer reflector, provides a concentrated spot light; and mounting means on said casing for mounting said luminaire on a supporting post and for mounting of photographic accessories on said luminaire.
Claim 3
Dependent Claim
56 words
A combined spot and flood light luminaire, as claimed in claim 1, in which said casing is substantially square and includes at least one pair of substantially parallel side walls extending forwardly from a rear wall; said hand grip being adjustably secured to one side wall and said shaft extending outwardly through said one side wall.
Claim 4
Dependent Claim
30 words
A combined spot and flood light luminaire, as claimed in claim 2, in which said hand grip is pivotal against a side wall of said casing, when not in use.
Claim 5
Dependent Claim
37 words
A combined spot and flood light luminaire, as claimed in claim 2, including a large diameter operating knob secured to the end of said handle for operation by the thumb of a hand gripping said hand grip.
Claim 6
Dependent Claim
135 words
A combined spot and flood light luminaire, as claimed in claim 1, including a circular cross section reflector retainer mounted in said casing and having a diameter, at its outer end, somewhat greater than the distance beween said pair of side walls so that the circular outer end of said retainer projects outwardly beyond said side wall; said retainer being formed, adjacent its outer end, with a shoulder seating a rim on the outer end of said outer parabolic reflector, and said retainer also having a radially inwardly facing grooved peripheral rim at its extreme outer end; and a retainer ring seated in the grooved rim of said reflector retainer for releasably maintaining a reflector assembly mounted therein; said outwardly projecting rim of said reflector assembly retainer serving as a mounting means for photographic accessories.
Claim 7
Dependent Claim
83 words
A combined spot and flood light luminaire, as claimed in claim 5, including a substantially square barn door frame of relatively thin and resilient metal; said frame having four side walls each formed with a relatively elongated slot therein adjacent its inner edge; said slots being engageable over the peripheral rim of said reflector assembly retainer for mounting of said frame on said luminaire and rotation of said frame through 360°; and barn doors mounted on side walls of said barn door frame.
Claim 8
Dependent Claim
53 words
A combined spot and flood light luminaire, as claimed in claim 6, in which each side wall of said barn door frame has pivotally mounted thereon and extending longitudinally thereof a mounting bracket; and respective barn doors mounted on each mounting bracket, each barn door including three leaves pivotally interconnected to each other.
Claim 9
Dependent Claim
39 words
A combined spot and flood light luminaire, as claimed in claim 6, in which each of said barn door frame side walls is formed with slots extending inwardly from its inner edge to receive mounting means for photographic accessories.
Claim 10
Dependent Claim
99 words
A combined spot and flood light luminaire, as claimed in claim 2, in which said mounting means comprises a bracket pivoted to said rear wall of said casing and including a first arm extending radially from the pivot and a second arm extending at right angles from the free end of said first arm toward the front of said casing; said second arm, adjacent its free end, being formed as an apertured bracket for receiving mounting stems and arms of photographic accessories; and a clamping screw threaded into said bracket and operable to clamp an arm or stem therein.
Claim 11
Dependent Claim
74 words
A combined spot and flood light luminaire, as claimed in claim 2, in which said mounting means comprises a substantially tubular bracket pivotally mounted on that side wall of said casing opposite to the side wall mounting said hand grip; a clamping screw threaded into said tubular bracket; said tubular bracket serving to mount said luminaire on a post or the like and further serving to receive a mounting post for additional photographic accessories.
Claim 12
Dependent Claim
94 words
A combined spot and flood light luminaire, as claimed in claim 8, including a filter frame including a substantially square main wall having a circular aperture therein and having flanges projecting perpendicular to each of its edges; a pair of opposite flanges having a pair of relatively elongated slots therein mounting a pair of resilient arms; said resilient arms extending beyond the slotted flanges for engagement in said slots opening inwardly from the front edges of the walls of said barn door frame for mounting of said filter frame in said barn door frame.
Claim 13
Dependent Claim
22 words
A combined spot and flood light luminaire, as claimed in claim 11, including plural circular scrims interchangeably mountable in said filter frame.
References Cited (Backward Citations)
US3851164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |