US4656567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indiscernible lamp
Assignee: Magneti Marelli UK Ltd
•
Filing: 1984-10-11
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Granted: 1987-04-07
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Expires: 2004-10-11
Abstract
Abstract A lamp which is designed to emit light of a specified color comprises a housing having a light-transmitting front cover which is juxtaposed to a colored decorative panel. One or more optical filters are disposed within the housing. The optical filters are positioned in the housing so as to intercept light before it is emitted through the front cover. Each filter colors the light in a mixture of said specified color and a color which is complementary to that of said front cover.
Inventors
- 👤 John R. Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:44
CPC Classifications
F; F21; F21S; F21S43/00; F21S43/20; F21S43/255
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
103 words
A lamp assembly comprising a housing having a pair of juxtaposed internal lamps for emitting light of respectively different colours, a light-transmitting front cover of substantially uniform colour for imparting a desired colour appearance to the assembly when neither lamp is energized, and a pair of respectively differently coloured optical colour filters in the housing for intercepting light from the respective lamps before the light is transmitted through the front cover, and for colouring the light in a mixture of the light colour emitted from the front cover by the respective lamp and a colour complimentary to the colour of the front cover.
Claim 2
Dependent Claim
103 words
A lamp assembly comprising a housing having a pair of juxtaposed internal lamps for emitting light of respectively different colours, a light-transmitting front cover of substantially uniform colour for imparting a desired colour appearance to the assembly when neither lamp is energized, and a pair of respectively differently coloured optical colour filters in the housing for intercepting light from the respective lamps before the light is transmitted through the front cover, and for colouring the light in a mixture of the light colour emitted from the front cover by the respective lamp and a colour complimentary to the colour of the front cover.
Claim 3
Dependent Claim
46 words
A lamp assembly as claimed in claim 1 wherein each colour filter includes a lens element positioned within the housing and a baffle disposed between the lens element and the cover, the cover itself being provided with lensing so that it forms an additional lens element.
Claim 4
Dependent Claim
54 words
A lamp assembly as claimed in claim 2 wherein the first mentioned lens element includes a multiplicity of individual lenses, and the baffle has a plurality of light-transmitting portions each of which is disposed on the optical axis of a respective one of those lenses, the remainder of the baffle being light-absorbing or opaque.
Claim 5
Dependent Claim
55 words
A lamp assembly as claimed in claim 3 wherein each of the individual lenses is arranged to focus a pencil of light rays through the respective light-transmitting portion of the baffle, and each light-transmitting portion is limited in its extent to that necessary to transmit substantially the whole of the pencil of the light rays.
References Cited (Backward Citations)
US1930774A
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US3514589A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |