US3598989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automotive headlight
Assignee: GTE Sylvania Inc
•
Filing: 1969-01-02
•
Granted: 1971-08-10
•
Expires: 1989-01-02
Abstract
Abstract An automotive headlight having a light source at one focus of an ellipsoid, an aperture at the other focus, the aperture being coated with a rim of glass to diffuse the light near the edges of the aperture. A lens focuses the aperture on the roadway.
Inventors
- 👤 Orrick H Biggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:01
CPC Classifications
F; F21; F21S; F21S41/00; F21S41/40; F21S41/43; F21S41/30; F21S41/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
86 words
A vehicle light comprising a light source, a gate having an aperture in front of said source, an optical system for projecting an image of said source near said aperture, the light from said image passing through said aperture, a lens in front of said aperture and having its rear focus near said image for projecting a beam, and a refracting material around at least one edge of said aperture in a rounded cross section to diminish diffraction and make the edges of the beam white.
Claim 2
Dependent Claim
86 words
A vehicle light comprising a light source, a gate having an aperture in front of said source, an optical system for projecting an image of said source near said aperture, the light from said image passing through said aperture, a lens in front of said aperture and having its rear focus near said image for projecting a beam, and a refracting material around at least one edge of said aperture in a rounded cross section to diminish diffraction and make the edges of the beam white.
Claim 3
Dependent Claim
23 words
A vehicle light as in claim 1, in which the refracting material is present as a coating around the edge of the aperture.
Claim 4
Dependent Claim
14 words
A vehicle light as in claim 2, in which the refracting material is glass.
Claim 5
Dependent Claim
41 words
The vehicle light as in claim 2, in which the optical system comprises a portion of an ellipsoid having a rear focus and a forward focus, a source of light at the rear focus and the gate at the forward focus.
References Cited (Backward Citations)
DE535057C
Cited
US3286193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |