US4713736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple color lamp
Assignee: DUALTECH CORP
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Filing: 1987-01-30
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Granted: 1987-12-15
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Expires: 2007-01-30
Abstract
Abstract According to the invention, a single headlamp is provided to selectively project a first color light, a second color light or a desired blend thereof. Preferably, a clear bulb contains a second bulb with a yellow light transmitting surface. Each bulb has a filament light source which can be selectively powered to produce white and yellow light, with the latter being effective for penetration of fog, dust, smoke, etc. with the lamp used on a moving vehicle.
Inventors
- 👤 George C. Kasboske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:14
CPC Classifications
F; F21; F21S; F21S41/00; F21S41/10; F21S41/14; F21S41/12; F21S41/125
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
95 words
In a lamp having a first bulb with a first light source and a first light transmitting surface for causing light transmitted therethrough by the first light source to have a first color, the improved comprising: a second bulb contained substantially within said first bulb, said second bulb having a second light transmitting surface for causing light transmitted therethrough to have a second color; a second source for transmitting light through said second light transmitting surface; and means for at least partially shielding said second light transmitting surface from light from said first light source.
Claim 2
Dependent Claim
95 words
In a lamp having a first bulb with a first light source and a first light transmitting surface for causing light transmitted therethrough by the first light source to have a first color, the improved comprising: a second bulb contained substantially within said first bulb, said second bulb having a second light transmitting surface for causing light transmitted therethrough to have a second color; a second source for transmitting light through said second light transmitting surface; and means for at least partially shielding said second light transmitting surface from light from said first light source.
Claim 3
Dependent Claim
18 words
The improved lamp according to claim 1 including means for selectively powering said first and second light sources.
Claim 4
Dependent Claim
23 words
The improved lamp according to claim 1 wherein said shielding means comprises a baffle and means mounting the baffle within said first bulb.
Claim 5
Dependent Claim
20 words
The improved lamp according to claim 1 wherein said shielding means comprises a light blocking coating on the second bulb.
Claim 6
Dependent Claim
105 words
In a vehicle lamp of the type having a reflector, a first bulb having a first light transmitting surface and a first light source which when powered causes a first color light to be transmitted through said first light transmitting surface and towards said reflector, the improvement comprising: a second bulb contained substantially within said first bulb, said second bulb having a second light transmitting surface for causing light transmitted therethrough to have a second color; a second source for transmitting light through said second light transmitting surface; and means for at least partially shielding said second bulb from light from said first light source.
Claim 7
Dependent Claim
105 words
In a vehicle lamp of the type having a reflector, a first bulb having a first light transmitting surface and a first light source which when powered causes a first color light to be transmitted through said first light transmitting surface and towards said reflector, the improvement comprising: a second bulb contained substantially within said first bulb, said second bulb having a second light transmitting surface for causing light transmitted therethrough to have a second color; a second source for transmitting light through said second light transmitting surface; and means for at least partially shielding said second bulb from light from said first light source.
Claim 8
Dependent Claim
23 words
The improved vehicle lamp according to claim 5 wherein said shielding means comprises a baffle means mounting the baffle within said first bulb.
Claim 9
Dependent Claim
21 words
The improved vehicle lamp according to claim 5 wherein said shielding means comprises a light blocking coating on the second bulb.
Claim 10
Dependent Claim
44 words
The improved vehicle lamp according to claim 5 wherein said first light transmitting surface is substantially clear and the second light transmitting surface is substantially yellow so that light transmitted through the second light transmitting surface effectively penetrates fog, snow, dust and the like.
Claim 11
Dependent Claim
101 words
A vehicle lamp comprising: a reflector; a cylindrical bulb having a first light transmitting surface and a first light source which when powered causes a first color light to be transmitted through said first light transmitting surface; means for mounting the cylindrical bulb relative to the reflector so that light from said first light source is directed toward said reflector; a second bulb contained substantially within said first bulb, said second bulb having a second light transmitting surface for causing light transmitted therethrough to have a second color; and a second source for transmitting light through said second light transmitting surface.
Claim 12
Dependent Claim
101 words
A vehicle lamp comprising: a reflector; a cylindrical bulb having a first light transmitting surface and a first light source which when powered causes a first color light to be transmitted through said first light transmitting surface; means for mounting the cylindrical bulb relative to the reflector so that light from said first light source is directed toward said reflector; a second bulb contained substantially within said first bulb, said second bulb having a second light transmitting surface for causing light transmitted therethrough to have a second color; and a second source for transmitting light through said second light transmitting surface.
Claim 13
Dependent Claim
18 words
The vehicle lamp according to claim 9 including means for selectively powering said first and second light sources.
Claim 14
Dependent Claim
24 words
The vehicle lamp according to claim 9 including means for at least partially shielding said second bulb from light from said first light source.
Claim 15
Dependent Claim
15 words
The vehicle lamp according to claim 9 wherein said first light transmitting surface is clear.
Claim 16
Dependent Claim
15 words
The vehicle lamp according to claim 9 wherein said second light transmitting surface is yellow.
Claim 17
Dependent Claim
21 words
The vehicle lamp according to claim 9 wherein said first light source resides between the reflector and the second light source.
Claim 18
Dependent Claim
33 words
The vehicle lamp according to claim 10 wherein said powering means comprise rheostat means for selectively controlling the first and second light sources to produce a desired mix of yellow and white light.
Claim 19
Dependent Claim
23 words
The vehicle lamp according to claim 11 wherein said shielding means comprises a baffle and means mounting the baffle within said first bulb.
Claim 20
Dependent Claim
20 words
The vehicle lamp according to claim 1 wherein said shielding means comprises a light blocking coating on the second bulb.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |