US4023060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ruggedized, high power tungsten-halogen lamp
Assignee: GTE Sylvania Inc
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Filing: 1975-11-28
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Granted: 1977-05-10
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Expires: 1995-11-28
Abstract
Abstract A high power tungsten-halogen lamp having a filament arrangement suspended between a pair of alumina bridge members which are supported by a pair of vertically disposed tungsten rods. To provide a ruggedized mount, the free ends of the vertical rods are retained in respective externally protruding cavities provided in the dome of the lamp envelope.
Inventors
- 👤 Bernard Pike
- 👤 Thomas A. Brewin
- 👤 Charles Kokinos, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:34
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
132 words
A tungsten-halogen lamp comprising: an hermetically sealed, light-transmitting envelope of generally tubular shape having a base at one end and a generally dome-shaped portion at the other end; a gas mixture within said envelope comprising an inert gas and a halogen; a pair of tungsten lead-in rods extending through said base into the interior of said envelope, said rods having substantially parallel portions within said envelope; a pair of bridge members within said envelope, each supported between said rods and disposed in a substantially parallel, spaced-apart relationship; a tungsten filament having a plurality of coiled sections suspended between and supported by said bridge members; and a pair of externally protruding cavities provided in the dome portion of said envelope within which the ends of said rods are respectively retained but not sealed.
Claim 2
Dependent Claim
132 words
A tungsten-halogen lamp comprising: an hermetically sealed, light-transmitting envelope of generally tubular shape having a base at one end and a generally dome-shaped portion at the other end; a gas mixture within said envelope comprising an inert gas and a halogen; a pair of tungsten lead-in rods extending through said base into the interior of said envelope, said rods having substantially parallel portions within said envelope; a pair of bridge members within said envelope, each supported between said rods and disposed in a substantially parallel, spaced-apart relationship; a tungsten filament having a plurality of coiled sections suspended between and supported by said bridge members; and a pair of externally protruding cavities provided in the dome portion of said envelope within which the ends of said rods are respectively retained but not sealed.
Claim 3
Dependent Claim
12 words
The lamp of claim 1 wherein said envelope is comprised of quartz.
Claim 4
Dependent Claim
13 words
The lamp of claim 2 wherein said bridge members are formed of alumina.
Claim 5
Dependent Claim
66 words
The lamp of claim 1 wherein each of said cavities comprises a tubular section protruding from the exterior of said envelope having one end open to the interior of said envelope and the other end closed by a seal, the internal diameter of each of said tubular sections being larger than the diameter of the rod retained therein but not more than double said rod diameter.
Claim 6
Dependent Claim
25 words
The lamp of claim 4 wherein said envelope is quartz and said cavities comprise sections of quartz tubing sealed to the exterior of said envelope.
Claim 7
Dependent Claim
19 words
The lamp of claim 4 wherein each of said cavities has a depth of at least about one-quarter inch.
Claim 8
Dependent Claim
23 words
The lamp of claim 5 wherein the wall thickness of the tubing forming each of said cavities is at least about 1/16 inch.
References Cited (Backward Citations)
US3626236A
Cited
US3909653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |