US3660903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drawing aid
Assignee: Individual
•
Filing: 1969-07-28
•
Granted: 1972-05-09
•
Expires: 1989-07-28
Abstract
Abstract As a drawing aid a plurality of sets of grids of different line spacings are drawn on transparent flexible sheet material and mounted on spaced rollers so that one or another of the set of grids can be turned into view according to the nature of the subject to be drawn as seen through the transparent grid sheet. A drawing surface has grids of similar spacing marked thereon for use in reproducing the subject seen through the grid of the transparent sheet. The grid rollers are mounted on a collapsible structure which is convertible from a drawing table to an easel.
Inventors
- 👤 George H Caperton Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:00
CPC Classifications
A; A47; A47B; A47B97/00; A47B97/04; A47B97/08; B; B43; B43L; B43L13/00; B43L13/14; B43L13/16; B43L13/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
147 words
A drawing aid comprising in combination a pair of spaced rollers A sheet of transparent, flexible material mounted on said rollers, said material having a plurality of grids with different grid spacings thereon in different portions thereof, said rollers being spaced to provide a sufficient distance between them for one grid at a time to be supported between the rollers, and the rollers being rotatable to bring one of said grids selectively into view between the rollers, A drawing surface having a grid marked thereon corresponding to one of the grids on said transparent sheet material, Means for rotating the rollers to bring selected grid into view and Means for supporting said grid rollers and the drawing surface in position for enabling a subject to be drawn to be observed through one of the grids of the transparent surface while the drawing surface is being drawn upon.
Claim 2
Dependent Claim
147 words
A drawing aid comprising in combination a pair of spaced rollers A sheet of transparent, flexible material mounted on said rollers, said material having a plurality of grids with different grid spacings thereon in different portions thereof, said rollers being spaced to provide a sufficient distance between them for one grid at a time to be supported between the rollers, and the rollers being rotatable to bring one of said grids selectively into view between the rollers, A drawing surface having a grid marked thereon corresponding to one of the grids on said transparent sheet material, Means for rotating the rollers to bring selected grid into view and Means for supporting said grid rollers and the drawing surface in position for enabling a subject to be drawn to be observed through one of the grids of the transparent surface while the drawing surface is being drawn upon.
Claim 3
Dependent Claim
144 words
A drawing aid comprising in combination a pair of vertical legs having upper ends A table with a back pivotally secured on said legs and with a front Bracing leg means having means for securing it to the front of said table for forming a front table leg A cross member between the upper ends of said vertical legs A lower grid roll rotatably mounted between said vertical legs near said table, An upper grid roll mounted between said vertical legs near said cross member, and A sheet of transparent, flexible material mounted on said grid rolls, said material having a plurality of grids with different grid spacing thereon in different portions thereof, each grid having a size corresponding substantially to the spacing between the grid rolls, the grid rolls being rotatable to bring one of said grids selectively into view between the rolls.
Claim 4
Dependent Claim
144 words
A drawing aid comprising in combination a pair of vertical legs having upper ends A table with a back pivotally secured on said legs and with a front Bracing leg means having means for securing it to the front of said table for forming a front table leg A cross member between the upper ends of said vertical legs A lower grid roll rotatably mounted between said vertical legs near said table, An upper grid roll mounted between said vertical legs near said cross member, and A sheet of transparent, flexible material mounted on said grid rolls, said material having a plurality of grids with different grid spacing thereon in different portions thereof, each grid having a size corresponding substantially to the spacing between the grid rolls, the grid rolls being rotatable to bring one of said grids selectively into view between the rolls.
Claim 5
Dependent Claim
44 words
A drawing aid as in claim 2 in which the upper grid roll is adjustable in position with respect to movement transverse to its axis and the said vertical legs are telescopic whereby the drawings aid may be folded in compact form for carrying.
Claim 6
Dependent Claim
52 words
A drawing aid as in claim 2 wherein a key is provided adjustably secured to one of said vertical legs and having a plurality of prongs adapted to lie along the grid surface of the transparent sheet for marking significant points of a subject to be viewed through the transparent sheet grid.
References Cited (Backward Citations)
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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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |