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US4071883A Expired / Lapsed US ⏱️ 0.0 years remaining

Multi-purpose laboratory light box

Assignee: Individual
•
Filing: 1976-09-28
•
Granted: 1978-01-31
•
Expires: 1996-09-28
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Abstract

Abstract A multi-purpose laboratory light box for observation and photographic procedures comprises a box of convenient size having two slidable top panels adapted to be moved toward and away from each other to provide an opening of variable width and location. The box is covered with light-absorbing black material inside and out. A pair of tubular fluorescent lamps are mounted respectively within the box on the facing edge portions of the two top panels, the lamps being adjacent the panels and substantially flush with the facing edges of the panels. In use, the lamps are energized to provide light in the variable opening between the top panels for purposes of observing and photographing desired characteristics of various laboratory specimens. Fluorescent lamps of different characteristics such as white light and ultraviolet light are useable interchangeably, depending on requirements. An invertible panel member covered with black velvet material on one face and white reflecting material on the other face may be used on the interior box bottom to provide light absorption or light reflection, depending on the requirements for a particular observation or photographic procedure. Plate members of various light-transmitting materials are provided to rest on the top panels and overlie the illuminated opening between the panels.

Inventors

  • 👤 Juanita Dennis

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 02:21
CPC Classifications
G; G03; G03D; G03D17/00; F; F21; F21V; F21V11/00; F21V11/16; F21V11/18; F21V9/00; F21V9/40; G09; G09F; G09F13/00; G09F13/04; G09F13/0418; G09F13/0454

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 115 words
A multi-purpose laboratory light box, comprising: a box having a bottom panel and side and end panels secured to each other in light-tight manner; guide means on said end panels in spaced relation with said bottom panel; a pair of top panels disposed in said guide means and adapted to be moved toward and away from each other to provide an opening therebetween of variable width and location; a pair of tubular fluorescent lamps respectively mounted within said box on the facing edge portions of said top panels, said lamps being adjacent to and substantially flush with the facing edges of said top panels, and circuit means for energizing said lamps for observation and photography.
Claim 2
Dependent Claim 115 words
A multi-purpose laboratory light box, comprising: a box having a bottom panel and side and end panels secured to each other in light-tight manner; guide means on said end panels in spaced relation with said bottom panel; a pair of top panels disposed in said guide means and adapted to be moved toward and away from each other to provide an opening therebetween of variable width and location; a pair of tubular fluorescent lamps respectively mounted within said box on the facing edge portions of said top panels, said lamps being adjacent to and substantially flush with the facing edges of said top panels, and circuit means for energizing said lamps for observation and photography.
Claim 3
Dependent Claim 32 words
The light box of claim 1 wherein the interior and exterior of said side, end and top panels and the interior of said bottom panel are covered with light absorbing black material.
Claim 4
Dependent Claim 21 words
The light box of claim 2 wherein said light-absorbing black material on the interior of said bottom panel is black velvet.
Claim 5
Dependent Claim 37 words
The light box of claim 1 wherein the interior and exterior of said side, end and top panels are covered with light-absorbing black material and the interior of said bottom panel is covered with light reflecting material.
Claim 6
Dependent Claim 55 words
The light box of claim 1 wherein the interior and exterior of said side, end and top panels are covered with light absorbing black material and the interior of said bottom panel is covered with an invertible panel member covered with black velvet material on one face and light reflecting material on the other face.
Claim 7
Dependent Claim 61 words
The light box of claim 1 wherein said top panels are of like size with outer edge portions extending beyond said said walls when said top panels are in positions abutting each other, whereby said outer edge portions may be grasped manually to move said top panels to provide an illuminated opening of desired size and location for observation and photography.
Claim 8
Dependent Claim 38 words
The light box of claim 1 with the addition of light reflecting members mounted adjacent said lamps on the sides thereof away from the facing edges of said top panels, said members adapted to reflect toward each other.
Claim 9
Dependent Claim 30 words
The light box of claim 1 with the addition of a light-transmitting plate member adapted to rest on said movable top panels and overlie the illuminated opening between said panels.

References Cited (Backward Citations)

US1988654A Cited
US3112887A Cited
US2567561A Cited
US2479008A Cited
US3136232A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-01-30 1981-08-01 1982-01-31 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-01-30 1985-08-01 1986-01-31 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-01-30 1989-08-01 1990-01-31 $7700.00 Window Closed / Lapsed

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