US4626965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illumination system for a visual display terminal
Assignee: Individual
•
Filing: 1985-11-21
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Granted: 1986-12-02
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Expires: 2005-11-21
Abstract
Abstract Two embodiments for an illumination system for a keyboard. One embodiment includes a channel located longitudinally between a visual display screen and its lower keyboard. An illuminator is mounted longitudinally in the channel so that light emitted is directed only to the keyboard and the work surface, avoiding illuminating the screen. The other embodiment includes a free standing keyboard illuminator including a housing sized to span a keyboard. The housing includes two contiguous, longitudinal sections with the first front section including a light source with a diverter to shed light only on the keyboard. The second back section includes a counterbalancing weight in relationship with the first section.
Inventors
- 👤 Vijai P. Gupta
- 👤 Jyoti Gupta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:55
CPC Classifications
F; F21; F21V; F21V33/00; F21V33/0004; F21V33/0052; F21S; F21S8/00; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
A combination illumination and visual display terminal comprising: (a) a housing including (i) a visual display terminal including a generally vertical screen juxtaposed above a generally horizontal keyboard extending forward and therebelow; (ii) a channel located longitudinally in said housing between said screen and said keyboard, said channel having a perimeter forming part of said housing, said channel including a longitudinal opening running generally its entire length, both of said opening's horizontal rims forming a plane with said terminal screen; and, (b) light means mounted longitudinally in said channel so that light emitted from said means is thereby directed generally only on said keyboard while avoiding illuminating said screen.
Claim 2
Dependent Claim
109 words
A combination illumination and visual display terminal comprising: (a) a housing including (i) a visual display terminal including a generally vertical screen juxtaposed above a generally horizontal keyboard extending forward and therebelow; (ii) a channel located longitudinally in said housing between said screen and said keyboard, said channel having a perimeter forming part of said housing, said channel including a longitudinal opening running generally its entire length, both of said opening's horizontal rims forming a plane with said terminal screen; and, (b) light means mounted longitudinally in said channel so that light emitted from said means is thereby directed generally only on said keyboard while avoiding illuminating said screen.
Claim 3
Dependent Claim
120 words
A free standing keyboard illuminator comprising: (a) a generally elongated and flat topped housing sized to span a keyboard, said housing including a ceiling, sides and ends and said housing including two contiguous, longitudinal sections, said first front section having means therein to receive a light source and a generally open bottom to act as a light, said second rearward section adapted to rest on a horizontal surface, said second section being of a predetermined size to house electrical parts and a predetermined weight in relationship to said first section to provide a counterbalance therefor; and, (b) light diverting means associated with and extending outward from said housing top beyond said housing's front section's interface with said housing's open bottom.
Claim 4
Dependent Claim
120 words
A free standing keyboard illuminator comprising: (a) a generally elongated and flat topped housing sized to span a keyboard, said housing including a ceiling, sides and ends and said housing including two contiguous, longitudinal sections, said first front section having means therein to receive a light source and a generally open bottom to act as a light, said second rearward section adapted to rest on a horizontal surface, said second section being of a predetermined size to house electrical parts and a predetermined weight in relationship to said first section to provide a counterbalance therefor; and, (b) light diverting means associated with and extending outward from said housing top beyond said housing's front section's interface with said housing's open bottom.
Claim 5
Dependent Claim
23 words
The device according to claim 1 comprising, additionally, a light diverting means associated with and extending outward from channel's top said horizontal rim.
Claim 6
Dependent Claim
22 words
The device according to claim 3 comprising, additionally, light diffusing means projecting downward between said light diverting means and said light means.
Claim 7
Dependent Claim
22 words
The device according to claim 2 comprising, additionally, light diffusing means projecting downward between said light diverting means and said light means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-01 | 1990-06-02 | 1990-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-01 | 1994-06-02 | 1994-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-01 | 1998-06-02 | 1998-12-02 | $7700.00 | Window Closed / Lapsed |