US4928414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self luminous characters and signs incorporating same
Assignee: Saunders Roe Developments Ltd
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Filing: 1988-11-04
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Granted: 1990-05-29
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Expires: 2008-11-04
Abstract
Abstract A self luminous character comprises a transparent light carrier having a plan shape defining the desired shape of the character and includes a longitudinally extending recess housing one or more self luminous light sources. Light from the or each light source diffuses through the transparent light carrier and is reflected by reflector means to be emitted through a front surface of the carrier and illuminate the plan shape of the character.
Inventors
- 👤 Alfred N. Bright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:45
CPC Classifications
G; G09; G09F; G09F13/00; G09F13/42
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
98 words
A self-luminous character including a transparent light carrier having a plan shape defining substantially the desired shape of the character, a channel formed in a front surface of the light carrier, at least one longitudinally extending recess in the carrier located at the bottom of said channel, at least one self luminous light source located in said recess, and reflector means, whereby light emitted by the light source diffuses through the transparent carrier and is reflected by the reflector means to be emitted through the front surface of the carrier and illuminate the plan shape of the character.
Claim 2
Dependent Claim
98 words
A self-luminous character including a transparent light carrier having a plan shape defining substantially the desired shape of the character, a channel formed in a front surface of the light carrier, at least one longitudinally extending recess in the carrier located at the bottom of said channel, at least one self luminous light source located in said recess, and reflector means, whereby light emitted by the light source diffuses through the transparent carrier and is reflected by the reflector means to be emitted through the front surface of the carrier and illuminate the plan shape of the character.
Claim 3
Dependent Claim
20 words
A character as claimed in claim 1, and including diffuser means attached over the front surface of the light carrier.
Claim 4
Dependent Claim
14 words
A character as claimed in claim 1, wherein the reflector means comprises reflective paint.
Claim 5
Dependent Claim
32 words
A character as claimed in claim 1, wherein the light carrier is generally rectangular in cross section and said reflector means is provided on side and rear surfaces of the light carrier.
Claim 6
Dependent Claim
31 words
A character as claimed in claim 4, wherein the reflector means comprises a reflector housing having reflective internal surfaces for location around the side and rear surfaces of the light carrier.
Claim 7
Dependent Claim
52 words
A character as claimed in claim 5, and including attachment means for attaching the light carrier to the reflector housing, said attachment means comprising at least one headed stud protruding from the rear surface of the light carrier for location through a mating hole in an internal web of the reflector housing.
Claim 8
Dependent Claim
28 words
A character as claimed in claim 6, wherein additional holes through the internal web of the reflector housing provides for attachment of the character to a support structure.
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) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |