US3684883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamphead for tungsten-halogen lamps
Assignee: Individual
•
Filing: 1970-09-24
•
Granted: 1972-08-15
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Expires: 1990-09-24
Abstract
Abstract A lamphead for a tungsten-halogen bulb, the lamphead being constituted by a convex reflector joined to a cylindrical chimney having a socket concentrically mounted therein for supporting a cylindrical bulb, thereby defining an annular air space within which a draft is created to cool the bulb. Extending between the periphery of a flange at the upper end of the chimney and the outwardly extending rim at the lower end of the reflector is an array of tensile wires that are spaced from the body of the reflector and of the chimney to form a protective cage making it possible to safely handle the hot lamphead.
Inventors
- 👤 Olive Entwistle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:23
CPC Classifications
F; F21; F21V; F21V25/00; F21V15/00; F21V15/02; F21V7/00; F21V7/04; F21V7/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
134 words
A lamphead for a tungsten-halogen lamp having a cylindrical bulb, said lamphead comprising: A. a reflector having an outwardly extending rim, B. a cylindrical chimney joined at its lower end to said reflector and communicating therewith, said chimney having an outwardly extending flange at its upper end, said chimney having a circular apron at an intermediate position thereon, C. a socket concentrically mounted within said chimney to support said lamp, thereby defining an annular air space within which a draft is created to cool said bulb, and D. an array of wires threaded through said apron and extending between the periphery of said flange and the periphery of said rim, said wires being spaced from the body of said chimney and said reflector to define a protective cage permitting safe handling of the lamphead.
Claim 2
Dependent Claim
134 words
A lamphead for a tungsten-halogen lamp having a cylindrical bulb, said lamphead comprising: A. a reflector having an outwardly extending rim, B. a cylindrical chimney joined at its lower end to said reflector and communicating therewith, said chimney having an outwardly extending flange at its upper end, said chimney having a circular apron at an intermediate position thereon, C. a socket concentrically mounted within said chimney to support said lamp, thereby defining an annular air space within which a draft is created to cool said bulb, and D. an array of wires threaded through said apron and extending between the periphery of said flange and the periphery of said rim, said wires being spaced from the body of said chimney and said reflector to define a protective cage permitting safe handling of the lamphead.
Claim 3
Dependent Claim
20 words
A lamphead as set forth in claim 1, wherein said reflector and chimney are fabricated of aluminum of high purity.
Claim 4
Dependent Claim
24 words
A lamphead as set forth in claim 1, wherein the periphery of said flange and said rim are protectively ensheathed in a plastic bead.
Claim 5
Dependent Claim
32 words
A lamphead as set forth in claim 1, further including a dimmer connected between said lamp and a power source to vary both the intensity and color of the light produced thereby.
Claim 6
Dependent Claim
15 words
A lamphead as set forth in claim 1, wherein said reflector has a concave form.
Claim 7
Dependent Claim
47 words
A lamphead as set forth in claim 1, further including a pair of pulleys mounted on said chimney at diametrically opposed positions, and a pair of resilient wires for supporting said lamphead, said wires having crook-shaped ends engaging said pulleys whereby said lamphead may be angularly adjusted.
References Cited (Backward Citations)
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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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |