US4088918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incandescent lamp having embedded support wires
Assignee: GTE Sylvania Inc
•
Filing: 1976-07-06
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Granted: 1978-05-09
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Expires: 1996-07-06
Abstract
Abstract The support means for a press-sealed single-ended tubular incandescent lamp comprises support wires which are embedded in the press seal and protrude from the edge thereof, substantially orthogonal to the axis of the lamp.
Inventors
- 👤 Paul E. Gates
- 👤 Stephen F. Kimball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:55
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
In a single-ended tubular incandescent lamp containing a tungsten filament and having a press seal at one end thereof, the tungsten filament being supported on lead-in wires that are sealed in the press seal, the improvement which comprises two support wires at each side of the press seal, each support wire being embedded in the press seal and extending from the longitudinal edge thereof substantially perpendicular to the envelope axis, the support wires being unconnected to the lead-in wires, the support wires being substantially coplanar with the press seal in order to substantially eliminate torsional forces.
Claim 2
Dependent Claim
96 words
In a single-ended tubular incandescent lamp containing a tungsten filament and having a press seal at one end thereof, the tungsten filament being supported on lead-in wires that are sealed in the press seal, the improvement which comprises two support wires at each side of the press seal, each support wire being embedded in the press seal and extending from the longitudinal edge thereof substantially perpendicular to the envelope axis, the support wires being unconnected to the lead-in wires, the support wires being substantially coplanar with the press seal in order to substantially eliminate torsional forces.
Claim 3
Dependent Claim
19 words
The lamp of claim 1 wherein the embedded end of each support wire does not have a sharp edge.
Claim 4
Dependent Claim
18 words
The lamp of claim 1 wherein the surface of the embedded portion of each support wire is oxidized.
References Cited (Backward Citations)
US2542326A
Cited
US3617797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |