US5260856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Headlamp for motor vehicles
Assignee: Robert Bosch GmbH
•
Filing: 1991-05-23
•
Granted: 1993-11-09
•
Expires: 2011-05-23
Abstract
Abstract A headlamp for motor vehicles has a reflector, a discharge lamp located in front of the reflector, a glass envelope surrounding the discharge lamp and being transparent in certain sections to light of specific wavelengths, a lamp carrier which holds the discharge lamp so that the discharge lamp is arranged in a space limited at least by the lamp carrier and the glass envelope. The glass envelope blocks UV light in UV-A, UV-B and UV-C wavelength range.
Inventors
- 👤 Peter Perthus
- 👤 Jurgen Stein
- 👤 Tilman Spingler
- 👤 Friedrich Schmied
- 👤 Peter Kusserow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:12
CPC Classifications
F; F21; F21V; F21V9/00; F21V9/06; F21S; F21S41/00; F21S41/10; F21S41/14; F21S41/17; F21S41/172; F21V25/00; F21V25/02; F21V25/04; F21S41/40; F21S41/43; F21S41/50; F21S41/55
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
129 words
A headlamp for motor vehicles, comprising a reflector; a discharge lamp located in front of said reflector; a glass envelope surrounding said discharge lamp and being transparent in certain sections to light of specific wavelengths; a lamp carrier which holds said discharge lamp so that said discharge lamp is arranged in a space limited at least by said lamp carrier and said glass envelope, said glass envelope blocking UV light, in UV-A, UV-B and UV-C wavelength range; a lamp ballast serving to support said discharge lamp with high voltage; electrical line connected said lamp ballast; and electrical conductor tracks arranged on an outer surface of said glass envelope and forming a part of said electrical line, said discharge lamp being prevented from operating when said electrical line is interrupted.
Claim 2
Dependent Claim
129 words
A headlamp for motor vehicles, comprising a reflector; a discharge lamp located in front of said reflector; a glass envelope surrounding said discharge lamp and being transparent in certain sections to light of specific wavelengths; a lamp carrier which holds said discharge lamp so that said discharge lamp is arranged in a space limited at least by said lamp carrier and said glass envelope, said glass envelope blocking UV light, in UV-A, UV-B and UV-C wavelength range; a lamp ballast serving to support said discharge lamp with high voltage; electrical line connected said lamp ballast; and electrical conductor tracks arranged on an outer surface of said glass envelope and forming a part of said electrical line, said discharge lamp being prevented from operating when said electrical line is interrupted.
Claim 3
Dependent Claim
30 words
A headlamp as defined in claim 1, wherein said electrical line is a part of a feed line from an electrical system of the motor vehicle to said lamp ballast.
Claim 4
Dependent Claim
36 words
A headlamp as defined in claim 1, wherein said electrical line is a control line formed so that an operation of said discharge lamp is prevented when said control line is interrupted by said lamp ballast.
Claim 5
Dependent Claim
55 words
A headlamp as defined in claim 1, wherein said glass envelope has a pot shape and a floor pointing in direction of emergence of light, said floor being non-transparent, said conductor tracks extending approximately parallel to a longitudinal axis of said glass envelope and being connected to one another in the region of said floor.
Claim 6
Dependent Claim
28 words
A headlamp as defined in claim 4; and further comprising an annular conductor section which connects said conductor tracks to one another in the region of said floor.
Claim 7
Dependent Claim
31 words
A headlamp as defined in claim 1; and further comprising a non-transparent cover provided on said glass envelope to form a light/dark border in a light distribution generated by the headlamp.
Claim 8
Dependent Claim
20 words
A headlamp as defined in claim 6, wherein said cover is formed as a coating applied to said glass envelope.
Claim 9
Dependent Claim
17 words
A headlamp as defined in claim 1, wherein said glass envelope has a floor which is non-transparent.
Claim 10
Dependent Claim
82 words
A headlamp as defined in claim 1; and further comprising a shutter with an optically effective edge and a lens arranged in direction of the light reflected by said reflector and forms an image of said edge of said shutter as a light/dark border of a light distribution, said glass envelope having an end which points in direction of emergence of light, said end of the glass envelope receiving said lens which blocks light in the UV-A, UV-B and UV-C wavelength range.
Claim 11
Dependent Claim
45 words
A headlamp as defined in claim 9, wherein said lens has an annular conductor section, said glass envelope having conductor tracks which are connected to said annular conductor section when said lens is inserted and are connected to one another by said annular conductor section.
Claim 12
Dependent Claim
21 words
A headlamp as defined in claim 10, wherein said conductor tracks are formed as evaporate conductor tracks on said glass envelope.
Claim 13
Dependent Claim
22 words
A headlamp as defined in claim 10, wherein said annular conductor sections are formed as an evaporated conductor section on said lens.
Claim 14
Dependent Claim
22 words
A headlamp as defined in claim 9, wherein said lamp carrier has a receptacle, said glass envelope being inserted in said receptacle.
Claim 15
Dependent Claim
33 words
A headlamp as defined in claim 9, wherein said reflector has a front edge provided with a receptacle, said glass envelope being inserted in said receptacle of said front edge of said reflector.
Claim 16
Dependent Claim
112 words
A headlamp for motor vehicles, comprising a reflector; a discharge lamp located in front of said reflector; a glass envelope surrounding said discharge lamp and being transparent in certain sections to light of specific wavelengths; a lamp carrier which holds said discharge lamp so that said discharge lamp is arranged in a space limited at least by said lamp carrier and said glass envelope, said glass envelop blocking UV light, in UV-A, UV-B and UV-C wavelength range, said lamp carrier having a receptacle, said glass envelope being inserted in said receptacle; conductor tracks arranged on said glass envelope; and means for making contact with said conductor tracks and arranged in said receptacle.
Claim 17
Dependent Claim
112 words
A headlamp for motor vehicles, comprising a reflector; a discharge lamp located in front of said reflector; a glass envelope surrounding said discharge lamp and being transparent in certain sections to light of specific wavelengths; a lamp carrier which holds said discharge lamp so that said discharge lamp is arranged in a space limited at least by said lamp carrier and said glass envelope, said glass envelop blocking UV light, in UV-A, UV-B and UV-C wavelength range, said lamp carrier having a receptacle, said glass envelope being inserted in said receptacle; conductor tracks arranged on said glass envelope; and means for making contact with said conductor tracks and arranged in said receptacle.
Claim 18
Dependent Claim
123 words
A headlamp for motor vehicles, comprising a reflector; a discharge lamp located in front of said reflector; a glass envelope surrounding said discharge lamp and being transparent in certain sections to light of specific wavelengths; a lamp carrier which holds said discharge lamp so that said discharge lamp is arranged in a space limited at least by said lamp carrier and said glass envelope, said glass envelop blocking UV light, in UV-A, UV-B and UV-C wavelength range, said reflector having a front edge provided with a receptacle, said glass envelope being inserted in said receptacle of said front edge of said reflector; conductor tracks arranged on said glass envelope; and means for making contact with said conductor tracks and arranged in said receptacle.
Claim 19
Dependent Claim
123 words
A headlamp for motor vehicles, comprising a reflector; a discharge lamp located in front of said reflector; a glass envelope surrounding said discharge lamp and being transparent in certain sections to light of specific wavelengths; a lamp carrier which holds said discharge lamp so that said discharge lamp is arranged in a space limited at least by said lamp carrier and said glass envelope, said glass envelop blocking UV light, in UV-A, UV-B and UV-C wavelength range, said reflector having a front edge provided with a receptacle, said glass envelope being inserted in said receptacle of said front edge of said reflector; conductor tracks arranged on said glass envelope; and means for making contact with said conductor tracks and arranged in said receptacle.
Claim 20
Dependent Claim
103 words
A headlamp for motor vehicles, comprising a reflector; a discharge lamp located in front of said reflector; a glass envelope surrounding said discharge lamp and being transparent in certain sections to light of specific wavelengths; a lamp carrier which holds said discharge lamp so that said discharge lamp is arranged in a space limited at least by said lamp carrier and said glass envelope, said glass envelop blocking UV light, in UV-A, UV-B and UV-C wavelength range; and means forming a crown-like receptacle provided with radially elastic resilient tabs, said glass envelope having an end region which is clamped between said resilient tabs.
Claim 21
Dependent Claim
103 words
A headlamp for motor vehicles, comprising a reflector; a discharge lamp located in front of said reflector; a glass envelope surrounding said discharge lamp and being transparent in certain sections to light of specific wavelengths; a lamp carrier which holds said discharge lamp so that said discharge lamp is arranged in a space limited at least by said lamp carrier and said glass envelope, said glass envelop blocking UV light, in UV-A, UV-B and UV-C wavelength range; and means forming a crown-like receptacle provided with radially elastic resilient tabs, said glass envelope having an end region which is clamped between said resilient tabs.
References Cited (Backward Citations)
FR1583987A
Cited
FR2158650A5
Cited
DE2854110A1
Cited
DE3304036A1
Cited
DE8803881U1
Cited
US4935660A
Cited
FR2652317A1
Cited
US5130904A
Cited
US5113330A
Cited
US5132881A
Cited
US5140504A
Cited
US5107405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-08 | 1997-05-10 | 1997-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-08 | 2001-05-10 | 2001-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-08 | 2005-05-10 | 2005-11-09 | $7700.00 | Window Closed / Lapsed |