US4536834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
R lamp having an improved neck section for increasing the useful light output
Assignee: General Electric Co
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Filing: 1984-05-22
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Granted: 1985-08-20
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Expires: 2004-05-22
Abstract
Abstract A reflector (R) having an improved neck section that increases the useful light output of the lamp is disclosed. The reflector lamp comprises a concave reflector having a primary reflective surface with a parabolic shape, one or more intermediate reflective surfaces with a parabolic shape substantially confocal with the primary reflective surface, and an improved neck section comprising a reducing section, a first substantially straight cylindrical section, an expanding section and a second substantially straight cylindrical section.
Inventors
- 👤 Robert W. Sands
- 👤 Daniel M. Bloom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:19
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/28; H01K1/32; H01K1/325
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
149 words
A reflector lamp comprising an electrically conductive base, a concave reflector, and a finite light source having its geometric center located approximately at the focal point of the concave reflector and rigidly affixed to an electrically insulative stem; said concave reflector comprising: (a) a primary reflective section having a parabolic shape and a focal point; (b) one or more intermediate reflective section each having a parabolic shape substantially confocal with said primary reflective section and each respectively joined by one or more transitional sections and; (c) a neck section effective in advantageously reflecting light rays impinging onto its surface back into the useful beam pattern of the reflector lamp and comprising; (c i ) a reducing section; (c ii ) a first substantially straight cylindrical section; (c iii ) an expanding section, and; (c iiii ) a second substantially straight cylindrical section for mating with the electrically conductive base.
Claim 2
Dependent Claim
149 words
A reflector lamp comprising an electrically conductive base, a concave reflector, and a finite light source having its geometric center located approximately at the focal point of the concave reflector and rigidly affixed to an electrically insulative stem; said concave reflector comprising: (a) a primary reflective section having a parabolic shape and a focal point; (b) one or more intermediate reflective section each having a parabolic shape substantially confocal with said primary reflective section and each respectively joined by one or more transitional sections and; (c) a neck section effective in advantageously reflecting light rays impinging onto its surface back into the useful beam pattern of the reflector lamp and comprising; (c i ) a reducing section; (c ii ) a first substantially straight cylindrical section; (c iii ) an expanding section, and; (c iiii ) a second substantially straight cylindrical section for mating with the electrically conductive base.
Claim 3
Dependent Claim
32 words
A reflector lamp according to claim 1 further comprising: a light reflective heat shield having a reflective surface that is positioned under such light source and mounted onto said electrically insulative stem.
Claim 4
Dependent Claim
18 words
A reflective lamp according to claim 2 wherein said light reflective heat shield is of a parabolic shape.
Claim 5
Dependent Claim
40 words
A reflective lamp according to claim 2 wherein said light reflective heat shield is separated from the inner walls of said first substantially straight cylindrical section by a distance in the range of about 1.5 mm to about 4.7 mm.
Claim 6
Dependent Claim
43 words
A reflector lamp according to claim 2 wherein said light reflective heat shield is separated from the junction of said first substantially straight cylindrical section and said expanding section by a distance in the range of about 1.57 mm to about 12.7 mm.
Claim 7
Dependent Claim
31 words
A reflector lamp according to claim 1 wherein one or more of said transitional sections have a radius of curvature in the range of about 1.0 mm to about 3.0 mm.
Claim 8
Dependent Claim
133 words
A reflector lamp according to claim 1 wherein said neck section comprises: said reducing section has a radius of a curvature in the range of about 1.4 mm to about 4.0 mm; said first substantially straight cylindrical section has an inner diameter in the range of about 27 mm to about 31 mm and a length of about 6.35 mm to about 25.4 mm; said second substantially straight cylindrical section has an inner diameter in the range of about 35.6 mm to about 38.0 mm and a length in the range of about 25.6 mm to about 31 mm, and; said expanding section has a minimum inner diameter in the range of said first substantially straight cylindrical section and a maximum inner diameter in the range of said second substantially straight cylindrical section.
Claim 9
Dependent Claim
49 words
A reflector lamp according to claim 1 wherein; said expanding and said second substantially straight cylindrical sections are translucent, and; said primary section, said one or more intermediate sections, said one or more transitional sections, and reducing section, and said first cylindrical section are coated with a reflective material.
Claim 10
Dependent Claim
19 words
A reflector lamp according to claim 1 wherein said light source is axially aligned parallel to the lamp axis.
Claim 11
Dependent Claim
18 words
A reflector lamp according to claim 1 wherein said light source is aligned perpendicular to the lamp axis.
Claim 12
Dependent Claim
15 words
A reflector lamp according to claim 1 wherein said light source comprises a tungsten filament.
Claim 13
Dependent Claim
17 words
A reflector lamp according to claim 1 wherein said light source comprises a halogen regenerative cycle lamp.
Claim 14
Dependent Claim
16 words
A reflector lamp according to claim 1 wherein said light source comprises an arc discharge lamp.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |