Patent US4408850A successfully refreshed from Google Patents.
US4408850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drawing table
Assignee: Individual
•
Filing: 1981-08-10
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Granted: 1983-10-11
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Expires: 2001-08-10
Abstract
Abstract The present invention provides a drawing table for use in the fields of drafting, architecture, computer graphics, and graphic arts and the like wherein the drawing table includes means allowing projection of an optical image from below onto the working surface of the table at a plurality of angles of impingement allowing the image to be traced and/or overlaid with another image at the working surface without interference with the optical image from the body or instruments of a worker positioned over the working surface and allowing the optical image to be distorted to other perspectives as desired and allowing scale variations by movement of the components of the table substantially along the horizontal or at inclines from the horizontal, and permitting the working surface of the table to be disposed at inclines from the horizontal without loss of the other advantages.
Inventors
- 👤 George G. Norek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:14
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
266 words
A drawing table comprising: an at least substantially translucent panel having a working surface; means supporting said panel comprising a frame supported on a pair of spaced apart substantially parallel side walls, wherein said frame is pivotally mounted at its forward edge to the top surfaces of said side walls; means for translating said panel to a plurality of positions whereby said working surface can be disposed in a plurality of oblique angles from said top surfaces of said side walls; means for illuminating said working surface through said panel seated between said side walls; and means for optically projecting an image onto said working surface through said panel at a plurality of angles of impingement and at variable scales comprising a detachable mirror pivotally mounted about its upper edge to mirror support means mounted on the inner faces of said side walls, means for translating said mirror support means to a plurality of positions along the horizontal along said inner faces, a detachable roller that is supported on an axial shaft and disposed between said side walls and adjustable to a plurality of positions along the vertical, wherein said mirror is held at an oblique angle at least partially spaced between said panel and said illuminating means when said mirror support means is in at least one of its positions while said roller is in at least one of its positions, and a projector adapted to project an image to at least one of said panel and mirror, said projector being mounted so as to be translatable to a plurality of positions from said mirror.
Claim 2
Dependent Claim
266 words
A drawing table comprising: an at least substantially translucent panel having a working surface; means supporting said panel comprising a frame supported on a pair of spaced apart substantially parallel side walls, wherein said frame is pivotally mounted at its forward edge to the top surfaces of said side walls; means for translating said panel to a plurality of positions whereby said working surface can be disposed in a plurality of oblique angles from said top surfaces of said side walls; means for illuminating said working surface through said panel seated between said side walls; and means for optically projecting an image onto said working surface through said panel at a plurality of angles of impingement and at variable scales comprising a detachable mirror pivotally mounted about its upper edge to mirror support means mounted on the inner faces of said side walls, means for translating said mirror support means to a plurality of positions along the horizontal along said inner faces, a detachable roller that is supported on an axial shaft and disposed between said side walls and adjustable to a plurality of positions along the vertical, wherein said mirror is held at an oblique angle at least partially spaced between said panel and said illuminating means when said mirror support means is in at least one of its positions while said roller is in at least one of its positions, and a projector adapted to project an image to at least one of said panel and mirror, said projector being mounted so as to be translatable to a plurality of positions from said mirror.
Claim 3
Dependent Claim
28 words
The drawing table of claim 1 wherein said illuminating means includes: a plurality of incandescent lamps; and a light diffusing wall disposed between said lamps and said panel.
Claim 4
Dependent Claim
22 words
The drawing table of claim 2 further including a plurality of reflector elements disposed adjacent said lamps opposite said light diffusing wall.
Claim 5
Dependent Claim
19 words
The drawing table of claim 2 further including means to feed electric current to said lamps at variable levels.
Claim 6
Dependent Claim
21 words
The drawing table of claim 1 wherein said panel includes a graphic data computer input means operable at said working surface.
Claim 7
Dependent Claim
26 words
The drawing table of claim 5 wherein said projecting means includes a computer graphic display projection means which interfaces with said graphic data computer input means.
Claim 8
Dependent Claim
16 words
The drawing table of claim 1 wherein said projector is moveably mounted for multiple projection directions.
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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) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |