US4340372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational aid
Assignee: Individual
•
Filing: 1980-04-17
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Granted: 1982-07-20
•
Expires: 2000-04-17
Abstract
Abstract An educational device utilizing light as the displaying medium is provided. The device has a light-impervious housing having a hole in the top and a light source therein. There is a plexiglass panel inside said housing, accessible through the hole in the top of the housing. The light source is located directly offset one edge of the plexiglass panel such that light rays from said light source enter the plexiglass panel through this edge and are entrapped therein. The housing also has slits in the sides thereof directly below the plexiglass panel so that paper inserts can be placed inside the housing directly beneath the plexiglass panel. The device is employed by turning on the light and by either inserting materials into the above-described slit or by writing on the outer surface of the plexiglass panel with a grease pencil. The light entrapped in the plexiglass panel will escape thru the top of the plexiglass panel and illuminate the inserts and the writing for the user's viewing.
Inventors
- 👤 Robert L. Brassine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:54
CPC Classifications
G; G09; G09B; G09B5/00; G09B5/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
251 words
A display device utilizing light as a display medium comprising: a transparent panel having a first face, a second face, and a side wall and having the characteristic that light entering said panel through said side wall will be emitted through said first face at least when a foreign object is in contact with either of said faces, the longitudinal plane of said transparent panel being in line with a source of light such that said side wall of said transparent panel is permeated by light from said source, a housing having a hole in one face thereof, said transparent panel being located within said housing in a position in relation to said hole that enables human access to said first face for writing or drawing on said first face, a background plate located in said housing and spaced below said transparent panel such that a plate-shaped gap to receive materials to be illuminated by said device is formed between said background plate and said transparent panel, wherein said housing has a slit in the side thereof to receive said materials and, a crayon container, said housing having a hole in the top thereof to receive said crayon container, said crayon container having upper lips extending therefrom to rest on said housing, wherein said crayon container has a light-impervious lid rotatably attached to a substantially transparent body, said crayon container being located adjacent to said light source so that the walls of said crayon container are illuminated by said light source.
Claim 2
Dependent Claim
251 words
A display device utilizing light as a display medium comprising: a transparent panel having a first face, a second face, and a side wall and having the characteristic that light entering said panel through said side wall will be emitted through said first face at least when a foreign object is in contact with either of said faces, the longitudinal plane of said transparent panel being in line with a source of light such that said side wall of said transparent panel is permeated by light from said source, a housing having a hole in one face thereof, said transparent panel being located within said housing in a position in relation to said hole that enables human access to said first face for writing or drawing on said first face, a background plate located in said housing and spaced below said transparent panel such that a plate-shaped gap to receive materials to be illuminated by said device is formed between said background plate and said transparent panel, wherein said housing has a slit in the side thereof to receive said materials and, a crayon container, said housing having a hole in the top thereof to receive said crayon container, said crayon container having upper lips extending therefrom to rest on said housing, wherein said crayon container has a light-impervious lid rotatably attached to a substantially transparent body, said crayon container being located adjacent to said light source so that the walls of said crayon container are illuminated by said light source.
Claim 3
Dependent Claim
44 words
A display device according to claim 16 wherein the hole in the top surface of said housing is of sufficient size so that said light source can be removed from said housing therethrough, and wherein said crayon container is easily removable from said housing.
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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) | 1985-07-19 | 1986-01-18 | 1986-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-19 | 1990-01-18 | 1990-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-19 | 1994-01-18 | 1994-07-20 | $7700.00 | Window Closed / Lapsed |