US4820163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artist's aid
Assignee: Individual
•
Filing: 1988-02-09
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Granted: 1989-04-11
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Expires: 2008-02-09
Abstract
Abstract An artist's aid comprising a sheet member which includes a transparent green filter for determining the differences in reflected light among various surfaces appearing in a visual field, a square aperture for framing a selected portion of the visual field, a circular aperture for visually isolating a relatively small portion of an object appearing in the visual fields, and three apertures arranged at the vertices of a triangle for visually separating a plurality of objects appearing inthe visual field.
Inventors
- 👤 Lorraine C. McCarty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:00
CPC Classifications
G; G09; G09B; G09B19/00; G09B19/0023
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
103 words
An artist's aid comprising a sheet member including: means for determining the differences in reflected light among various surfaces appearing in a visual field, the determining means comprising an aperture formed on the sheet member, the aperture being covered by a transparent filter; means for framing a selected portion of said visual field; means for visually isolating a relatively small portion of an object appearing in said visual field; and means for visually separating a plurality of objects appearing in said visual field, the separating means comprising a plurality of spaced apertures formed in the sheet member and arranged in a predetermined group.
Claim 2
Dependent Claim
103 words
An artist's aid comprising a sheet member including: means for determining the differences in reflected light among various surfaces appearing in a visual field, the determining means comprising an aperture formed on the sheet member, the aperture being covered by a transparent filter; means for framing a selected portion of said visual field; means for visually isolating a relatively small portion of an object appearing in said visual field; and means for visually separating a plurality of objects appearing in said visual field, the separating means comprising a plurality of spaced apertures formed in the sheet member and arranged in a predetermined group.
Claim 3
Dependent Claim
14 words
The artist's aid of claim 1 wherein the transparent filter is a green filter.
Claim 4
Dependent Claim
20 words
The artist's aid of claim 1 wherein the means for framing comprises a square aperture formed in the sheet member.
Claim 5
Dependent Claim
19 words
The artist's aid of claim 1 wherein the isolating means comprises a circular aperture formed in the sheet member.
Claim 6
Dependent Claim
32 words
The artist's aid of claim 1 wherein the means for separating comprises a group of three circular apertures arranged at the vertices of an isosceles right triangle formed in the sheet member.
Claim 7
Dependent Claim
110 words
An artist's aid comprising a sheet member including: means for determining the differences in reflected light amoung various surfaces appearing in a visual field; means for framing a selected portion of said visual field; means for visually isolating a relatively small portion of an object appearing in said visual field; means for visually separating a plurality of objects appearing in said visual field; and a plurality of fields sequentially graded from black to white to form a gray scale located adjacent an edge of the sheet member, each of said plurality of fields having an aperture formed therein, said plurality of fields being numbered in order from darkest to lightest.
Claim 8
Dependent Claim
110 words
An artist's aid comprising a sheet member including: means for determining the differences in reflected light amoung various surfaces appearing in a visual field; means for framing a selected portion of said visual field; means for visually isolating a relatively small portion of an object appearing in said visual field; means for visually separating a plurality of objects appearing in said visual field; and a plurality of fields sequentially graded from black to white to form a gray scale located adjacent an edge of the sheet member, each of said plurality of fields having an aperture formed therein, said plurality of fields being numbered in order from darkest to lightest.
Claim 9
Dependent Claim
15 words
The artist's aid of claim 1 further comprising means for measuring lengths, angles and perspective.
Claim 10
Dependent Claim
42 words
The artist's aid of claim 7 wherein the measuring means comprises a long, rectangular member pivotally attached at one end thereof to a corner of the sheet member, said rectangular member having markings disposed along an edge thereof to form a ruler.
Claim 11
Dependent Claim
53 words
An artist's aid comprising a sheet member including: a rectangular aperture formed therein, said rectangular aperture being covered with a transparent green filter; a square aperture formed therein; a single circular aperture formed therein; and a group of three circular apertures formed therein arranged to form the vertices of an isosceles right triangle.
Claim 12
Dependent Claim
53 words
An artist's aid comprising a sheet member including: a rectangular aperture formed therein, said rectangular aperture being covered with a transparent green filter; a square aperture formed therein; a single circular aperture formed therein; and a group of three circular apertures formed therein arranged to form the vertices of an isosceles right triangle.
Claim 13
Dependent Claim
98 words
An artist's aid comprising a sheet member including: a rectangular aperture formed therein, said rectangular aperture being covered with a transparent green filter; a square aperture formed therein; a single circular aperture formed therein; a group of three circular apertures formed therein arranged to form the vertices of an isosceles right triangle; and a plurality of fields sequentially graded from black to white to form a gray scale adjacent an edge of the sheet member, each of said plurality of fields having an aperture formed therein, said plurality of fields being numbered in order from darkest to lightest.
Claim 14
Dependent Claim
98 words
An artist's aid comprising a sheet member including: a rectangular aperture formed therein, said rectangular aperture being covered with a transparent green filter; a square aperture formed therein; a single circular aperture formed therein; a group of three circular apertures formed therein arranged to form the vertices of an isosceles right triangle; and a plurality of fields sequentially graded from black to white to form a gray scale adjacent an edge of the sheet member, each of said plurality of fields having an aperture formed therein, said plurality of fields being numbered in order from darkest to lightest.
Claim 15
Dependent Claim
38 words
The artist's aid of claim 9 further comprising a long, rectangular member pivotally attached at one end thereof to a corner of the sheet member, said rectangular member having markings disposed an edge thereof to form a ruler.
Claim 16
Dependent Claim
40 words
The artist's aid of claim 2 wherein the transparent green filter has a plurality of cross-hairs disposed thereon, said cross-hairs aligning with a plurality of spaced apart dots formed in the sheet member adjacent the periphery of the rectangular aperture.
Claim 17
Dependent Claim
40 words
The artist's aid of claim 9 wherein the transparent green filter has a plurality of cross-hairs disposed thereon, said cross-hairs aligning with a plurality of spaced apart dots formed in the sheet member adjacent the periphery of the rectangular aperture.
Claim 18
Dependent Claim
26 words
The artist's aid of claim 2 wherein the transparent green filter passes light of wave lengths in a range of between 4,912 to 5,750 angstrom units.
Claim 19
Dependent Claim
26 words
The artist's aid of claim 9 wherein the transparent green filter passes light of wave lengths in a range of between 4,912 to 5,750 angstrom units.
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) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |