Patent US4298916A successfully refreshed from Google Patents.
US4298916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting system with baffle
Assignee: Sylvan R Shemitz Designs Inc
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Filing: 1977-07-26
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Granted: 1981-11-03
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Expires: 1997-07-26
Abstract
Abstract A lighting system wherein a task-oriented light source is supplemented by the provision of a baffle so located in relation to the positions of the source, the task and the observer as to block out or modify, in whole or in part, the light reaching the task at angles such as would produce veiling reflections. The baffle may be plastic or glass with polarizing characteristics and may be flat or curved; it also may be fixed or adjustable.
Inventors
- 👤 Sylvan R. Shemitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:38
CPC Classifications
F; F21; F21V; F21V14/00; F21V14/08; F21S; F21S8/00; F21V11/00; F21V11/02; F21V9/00; F21V9/14; F21W; F21W2131/00; F21W2131/40; F21W2131/402; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
149 words
A task-oriented lighting system for use with a task supported in a substantially horizontal position and adapted to be viewed from a first direction and from an observation point located at elevations between sitting eye height and standing eye height, comprising an elongated light source having its long axis substantially perpendicular to said first direction, said light source being an element of a luminaire which includes a housing and at least one reflector, the housing being provided with at least one slot disposed parallel to the axis of the light source, and the system including a baffle interposed between the light source and the task and extending laterally far enough to intersect most vertical planes passing through the observation point and the task, the baffle being mounted in said slot and laterally adjustable therealong, whereby light from the source which could cause veiling reflections from the task is intercepted.
Claim 2
Dependent Claim
149 words
A task-oriented lighting system for use with a task supported in a substantially horizontal position and adapted to be viewed from a first direction and from an observation point located at elevations between sitting eye height and standing eye height, comprising an elongated light source having its long axis substantially perpendicular to said first direction, said light source being an element of a luminaire which includes a housing and at least one reflector, the housing being provided with at least one slot disposed parallel to the axis of the light source, and the system including a baffle interposed between the light source and the task and extending laterally far enough to intersect most vertical planes passing through the observation point and the task, the baffle being mounted in said slot and laterally adjustable therealong, whereby light from the source which could cause veiling reflections from the task is intercepted.
Claim 3
Dependent Claim
28 words
A task-oriented lighting system according to claim 1 wherein the housing is provided with two parallel slots and the baffle has opposite edges, each mounted in a slot.
Claim 4
Dependent Claim
26 words
A task-oriented lighting system according to claim 1 wherein the housing has an elongated opening for outward passage of light from the source and the reflector.
Claim 5
Dependent Claim
35 words
A task-oriented lighting system according to claim 3 wherein the opening is bordered by at least one longitudinally extending track and an edge of the baffle is engaged in and laterally adjustable along said track.
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) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |