US4414609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminaire for a visual display terminal
Assignee: SYLVAN R SHEMITZ AND ASSOCIATES Inc
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Filing: 1982-10-08
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Granted: 1983-11-08
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Expires: 2002-10-08
Abstract
Abstract An illumination system for a workstation having a backwall, a substantially horizontally disposed work surface, and a visual display terminal adapted to be viewed by an operator in a direction substantially perpendicular to the backwall is disclosed. The system provides a backlighting component of illumination as well as task lighting and ambient lighting.
Inventors
- 👤 Sylvan R. Shemitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:12
CPC Classifications
F; F21; F21V; F21V33/00; F21V33/0004; F21V33/0052; F21S; F21S8/00; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
156 words
An illumination system for a workstation having a backwall, a substantially horizontally disposed work surface, and a visual display terminal adapted to be viewed by an operator in a direction substantially perpendicular to said backwall, comprising: a first light source having a first longitudinal axis, said first light source being mounted above said visual display terminal with said longitudinal axis substantially parallel to said work surface for directing light onto said backwall; a second light source having a second longitudinal axis, said second light source being mounted at substantially the same height above the visual display terminal as said first light source with said second longitudinal axis disposed substantially parallel to said first longitudinal axis; and reflector means associated with said second light source for directing upwardly a portion of the light emanating from said second light source to provide ambient room lighting and for directing downwardly another portion of said light toward said work surface.
Claim 2
Dependent Claim
156 words
An illumination system for a workstation having a backwall, a substantially horizontally disposed work surface, and a visual display terminal adapted to be viewed by an operator in a direction substantially perpendicular to said backwall, comprising: a first light source having a first longitudinal axis, said first light source being mounted above said visual display terminal with said longitudinal axis substantially parallel to said work surface for directing light onto said backwall; a second light source having a second longitudinal axis, said second light source being mounted at substantially the same height above the visual display terminal as said first light source with said second longitudinal axis disposed substantially parallel to said first longitudinal axis; and reflector means associated with said second light source for directing upwardly a portion of the light emanating from said second light source to provide ambient room lighting and for directing downwardly another portion of said light toward said work surface.
Claim 3
Dependent Claim
28 words
The illumination system of claim 1, further comprising reflector means associated with said first light source for directing a portion of the light emanating therefrom onto said backwall.
Claim 4
Dependent Claim
34 words
The illumination system of claim 2, wherein said reflector means associated with said first light source further directs a portion of said light emanating from said first light source upwardly to provide ambient lighting.
Claim 5
Dependent Claim
30 words
The illumination system of claim 2, wherein said reflector means associated with said first light source is shaped to minimize excessive brightness behind and to the sides of said workstation.
Claim 6
Dependent Claim
25 words
The illumination system of claim 1, wherein said second light source is horizontally adjustable toward or away from the operator of said visual display terminal.
Claim 7
Dependent Claim
25 words
The illumination system of claim 5, further comprising: roller means connected to said second light source for providing horizontal adjustability of said second light source.
Claim 8
Dependent Claim
32 words
The illumination system of claim 5, wherein said first light source is fixedly attached to said second light source for horizontal adjustment of said first light source with said second light source.
Claim 9
Dependent Claim
18 words
The illumination system of claim 5, wherein said first light source is held fixed adjacent to said backwall.
Claim 10
Dependent Claim
28 words
The illumination system of claim 1, further comprising: a shield associated with said second light source for preventing illumination of the operator's person by said second light source.
Claim 11
Dependent Claim
12 words
The illumination system of claim 9, wherein said shield is vertically adjustable.
Claim 12
Dependent Claim
17 words
The illumination system of claim 10, wherein said shield is hingedly mounted on said second light source.
Claim 13
Dependent Claim
17 words
The illumination system of claim 10, wherein said shield is slideably mounted on said second light source.
Claim 14
Dependent Claim
115 words
An illumination system for a workstation having a substantially horizontally disposed work surface, and a visual display terminal adapted to be viewed by an operator in a first direction, comprising: a light source having a first longitudinal axis, said light source being mounted above said visual display terminal with said longitudinal axis substantially parallel to said work surface; reflector means associated with said light source for directing upwardly a portion of the light emanating from said light source to provide ambient room lighting and for directing downwardly another portion of said light toward said work surface; and a shield associated with said light source for preventing illumination of the operator's person by said light source.
Claim 15
Dependent Claim
115 words
An illumination system for a workstation having a substantially horizontally disposed work surface, and a visual display terminal adapted to be viewed by an operator in a first direction, comprising: a light source having a first longitudinal axis, said light source being mounted above said visual display terminal with said longitudinal axis substantially parallel to said work surface; reflector means associated with said light source for directing upwardly a portion of the light emanating from said light source to provide ambient room lighting and for directing downwardly another portion of said light toward said work surface; and a shield associated with said light source for preventing illumination of the operator's person by said light source.
Claim 16
Dependent Claim
12 words
The illumination system of claim 13, wherein said shield is vertically adjustable.
Claim 17
Dependent Claim
16 words
The illumination system of claim 14, wherein said shield is hingedly mounted on said light source.
Claim 18
Dependent Claim
16 words
The illumination system of claim 14, wherein said shield is slideably mounted on said light source.
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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) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |