US4353007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge lamp unit including integral ballast
Assignee: US Philips Corp
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Filing: 1980-02-26
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Granted: 1982-10-05
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Expires: 2000-02-26
Abstract
Abstract The invention relates to a lamp unit provided with a mercury vapor discharge tube and a stabilization ballast which forms one mechanical whole therewith. This lamp unit is provided with a lamp base of a type which is customary for incandescent lamps. In accordance with the invention the discharge tube is a low-pressure discharge tube having a relatively high arc voltage. This results in a lamp unit whose ballast portion is small.
Inventors
- 👤 Jozef C. Moerkens
- 👤 Leonard Woldring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:13
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/56; H01J61/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A lamp unit comprising a mercury-vapor discharge tube and an inductive stabilization ballast for said discharge tube, said ballast forming one mechanical whole with said discharge tube, said discharge tube being provided with at least two internal electrodes, a discharge path between said electrodes being electrically in series with said stabilization ballast, means for applying a voltage which is nominally S volts to the series connection of the discharge path and said stabilization ballast, said lamp unit having only one lamp base, said discharge tube being a low-pressure discharge tube whose arc voltage is between 0.54 S Volt and 0.64 S Volt, said lamp being substantially ballasted by said inductive stabilization ballast, the volume of the discharge space of the discharge tube being smaller than 40 cubic centimeters and said internal electrodes of the discharge tube are of a preheatable type.
Claim 2
Dependent Claim
141 words
A lamp unit comprising a mercury-vapor discharge tube and an inductive stabilization ballast for said discharge tube, said ballast forming one mechanical whole with said discharge tube, said discharge tube being provided with at least two internal electrodes, a discharge path between said electrodes being electrically in series with said stabilization ballast, means for applying a voltage which is nominally S volts to the series connection of the discharge path and said stabilization ballast, said lamp unit having only one lamp base, said discharge tube being a low-pressure discharge tube whose arc voltage is between 0.54 S Volt and 0.64 S Volt, said lamp being substantially ballasted by said inductive stabilization ballast, the volume of the discharge space of the discharge tube being smaller than 40 cubic centimeters and said internal electrodes of the discharge tube are of a preheatable type.
References Cited (Backward Citations)
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Cited
US2301670A
Cited
US2298581A
Cited
US3549941A
Cited
US3538370A
Cited
US3611009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |