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US3602761A
Expired / Lapsed
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Explosion proof quartz-halogen lamp
Assignee: GTE Sylvania Inc
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Filing: 1969-06-30
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Granted: 1971-08-31
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Expires: 1989-06-30
Abstract
Abstract A quartz-halogen lamp has a coiled filament connected to a ribbon connector by a tungsten conductor, the ribbon connector being embedded within a press seal of the lamp envelope. The diameter of the conductor is at least about three times the diameter of the filament wire in order to prevent lamp explosions resulting from high amperage arcs that may occur at the time of filament failure.
Inventors
- 👤 Stephen F Kimball
- 👤 Robert P Bonazoli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:45
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/38
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
48 words
The lamp of claim 1 in combination with an electric supply circuit having a circuit interrupting device therein, the relationship between said lamp and said device being such that upon failure of the lamp filament under arc causing conditions, said device opens the circuit before the lamp explodes.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |