US5083253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting unit
Assignee: PLATRES LAFARGE SA A CORP OF FRANCE
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Filing: 1989-01-13
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Granted: 1992-01-21
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Expires: 2009-01-13
Abstract
Abstract The lighting unit (10) is designed for use with video cameras. The lighting unit is light in weight, compact in size and portable. There is a housing (11) including a reflector (30) and a light source (33). A focussing lens (12) is moveably mounted on the housing (11) forwardly of the light source (33). The light source is moveable between two final positions to provide either floodlight or spotlight. This enables the photo amateur to obtain illumination as a professional at affordable costs.
Inventors
- 👤 Walter Hahnel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:13
CPC Classifications
F; F21; F21S; F21S8/00; F21V; F21V14/00; F21V14/06; F21V13/00; F21V13/02; F21V13/04; G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/035; G03B15/04; G03B15/041; G03B15/0421; F21V21/00; F21V21/14; F21V21/30; F21V29/00; F21V29/50; F21V29/60; F21V29/67; F21V5/00; F21V5/04; F21V5/048; F21V7/00; F21V7/04; F21V7/045; F21W; F21W2131/00; F21W2131/40; F21W2131/406
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
128 words
A lighting unit comprising: a housing; a sub-housing slidably mounted in the housing; a reflector mounted within the housing; a removable light source fixed within the housing and disposed within the region of the reflector; a focussing lens fixed in the sub-housing so as to be movably mounted on the housing forwardly of the light source, the lens at least being movable between positions to provide floodlight and spotlight beams; resilient arms extending in the direction of relative movement between the sub-housing and the housing and being fastened to the sub-housing; finger grips mounted on free ends of the resilient arms; cooperating teeth provided on an inner side of said housing and on said resilient arms, respectively, for releasably securing said sub-housing to said housing at different positions.
Claim 2
Dependent Claim
128 words
A lighting unit comprising: a housing; a sub-housing slidably mounted in the housing; a reflector mounted within the housing; a removable light source fixed within the housing and disposed within the region of the reflector; a focussing lens fixed in the sub-housing so as to be movably mounted on the housing forwardly of the light source, the lens at least being movable between positions to provide floodlight and spotlight beams; resilient arms extending in the direction of relative movement between the sub-housing and the housing and being fastened to the sub-housing; finger grips mounted on free ends of the resilient arms; cooperating teeth provided on an inner side of said housing and on said resilient arms, respectively, for releasably securing said sub-housing to said housing at different positions.
Claim 3
Dependent Claim
23 words
A lighting unit according to claim 1, wherein the reflector includes a part-spherical member and is disposed slightly rearwardly of the light source.
Claim 4
Dependent Claim
27 words
A lighting unit according to claim 1, wherein the housing has an underside with an aperture for receiving a holder on which the light source is mounted.
Claim 5
Dependent Claim
31 words
A lighting unit according to claim 3, wherein the holder is removably engageable with the housing, the holder and the housing having corresponding engaging means for locking the holder in place.
Claim 6
Dependent Claim
34 words
A lighting unit according to claim 4, wherein the engaging means on the holder are fastened to resilient plastic arms and are resiliently urged into locking engagement with the engaging means in the housing.
Claim 7
Dependent Claim
22 words
A lighting unit according to claim 1, further including a detachable fan unit removably engageable on a rear portion of the housing.
Claim 8
Dependent Claim
37 words
A lighting unit according to claim 6, wherein the rear portion of said housing includes ribs with recesses at ends thereof, and the fan unit has a housing with cooperating engaging means in the form of protrusions.
Claim 9
Dependent Claim
25 words
A lighting unit according to claim 7, wherein the resilient arms comprise leaf springs and said housing includes slots which guidingly receive said resilient arms.
Claim 10
Dependent Claim
19 words
A lighting unit according to claim 8, wherein said leaf springs urge the teeth into engagement with each other.
Claim 11
Dependent Claim
27 words
A lighting unit according to claim 1, further including pins with heads at ends thereof provided on a front face of the sub-housing for mounting filters thereon.
Claim 12
Dependent Claim
19 words
A lighting unit according to claim 1, further including a tube-shaped member surrounding the light source in the housing.
Claim 13
Dependent Claim
31 words
A lighting unit according to claim 11, wherein the tube-shaped member includes an aperture in a lower side thereof to provide access for inserting a light bulb of said light source.
Claim 14
Dependent Claim
51 words
A lighting unit according to claim 11, wherein the reflector includes a part-spherical member and further including lugs inwardly projecting from the tube-shaped member, serving as stops for a front face of the part-spherical member, and a compression spring clamped between an inner side of the reflector and said part-spherical member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-20 | 1995-07-22 | 1996-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-20 | 1999-07-22 | 2000-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-20 | 2003-07-22 | 2004-01-21 | $7700.00 | Window Closed / Lapsed |