Patent US3750979A successfully refreshed from Google Patents.
Patent US3784807A successfully refreshed from Google Patents.
US3784807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric lamp
Assignee: US Philips Corp
•
Filing: 1972-09-13
•
Granted: 1974-01-08
•
Expires: 1992-09-13
Abstract
Abstract A lamp in which the reflector which is provided with a halogen incandescent lamp is beaded, on its widened circumference, around the edge of a cover glass and an epoxy glue is present between said flanged part and a more central part of the cover glass. The flanged edge serves to secure the cover glass and the epoxy resin serves for a substantially completely diffusion-tight seal against water vapour from the atmosphere.
Inventors
- 👤 A Boekkooi
- 👤 A Heeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:21
CPC Classifications
H; H01; H01K; H01K3/00; H01K3/26; H01J; H01J5/00; H01J5/20; H01J5/22; H01J5/24; H01K1/00; H01K1/36; H01J2893/00; H01J2893/0033; H01J2893/0037; H01J2893/0038
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
184 words
In an electric lamp of the type having at least one incandescent lamp arranged inside a gas-tight envelope and consisting of a metal reflector and a cover glass, the improvement comprising that the cover glass has a circumferential outer lip, said lip having an inner annular Face for abutting the reflector, an outer circumferential edge portion and an outer annular face, said outer face forming a space having an L-shaped cross-section with a cylindrical wall of the cover glass, the reflector having a central axis and having a portion for supporting the cover glass, said supporting portion of the reflector extending over the outer lip of the cover glass and substantially conforming to the inner abutting face and outer edge and having a portion curled over the lip toward the axis of the reflector, the curled portion having a free end pressing against the outer face of the lip, the lower portion of the curl including the free end forming an openended annular volume with said L-shaped portion, said annular volume having an epoxy resin disposed therein to join the glass and reflector portions.
Claim 2
Dependent Claim
184 words
In an electric lamp of the type having at least one incandescent lamp arranged inside a gas-tight envelope and consisting of a metal reflector and a cover glass, the improvement comprising that the cover glass has a circumferential outer lip, said lip having an inner annular Face for abutting the reflector, an outer circumferential edge portion and an outer annular face, said outer face forming a space having an L-shaped cross-section with a cylindrical wall of the cover glass, the reflector having a central axis and having a portion for supporting the cover glass, said supporting portion of the reflector extending over the outer lip of the cover glass and substantially conforming to the inner abutting face and outer edge and having a portion curled over the lip toward the axis of the reflector, the curled portion having a free end pressing against the outer face of the lip, the lower portion of the curl including the free end forming an openended annular volume with said L-shaped portion, said annular volume having an epoxy resin disposed therein to join the glass and reflector portions.
Claim 3
Dependent Claim
61 words
An electric lamp as claimed in claim 1 wherein a drier is present in the space within the curled portion of the reflector and bounded by the outer face of the lip, above which the water vapour pressure at the highest operating temperature which can occur in said space is smaller than or corresponds approximately to the water pressured at 0*C.
Claim 4
Dependent Claim
16 words
An electric lamp as claimed in claim 2 wherein said drier is comprised of molecular sieves.
Claim 5
Dependent Claim
21 words
The lamp of claim 1 wherein an annular ring of cardboard is disposed between the inner abutting face and the reflector.
References Cited (Backward Citations)
US1322044A
Cited
US1339695A
Cited
US1622437A
Cited
US2003687A
Cited
US2317035A
Cited
US3010045A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |