US3851394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perspective pole
Assignee: Individual
•
Filing: 1973-03-14
•
Granted: 1974-12-03
•
Expires: 1993-03-14
Abstract
Abstract Apparatus is disclosed for making scaled perspective views of two-dimensional drawings. The drawing illustrating a figure to be drawn in perspective is placed upon a magnetically responsive medium. A transparent grid pattern is laid over the drawing to provide coordinates for the figure in the X and Y axis. A plurality of standing uniformly banded poles are placed at selected points of the drawing to provide coordinates for the figure in the Z axis. The lower end of each of the poles includes a magnetic element, which element is attracted to the magnetically responsive medium and retains the pole vertically oriented and positioned upon the figure. The combination of drawing, grid and poles, is photographed from the desired perspective distance and angle. The photographic negative is projected onto a screen to display the desired view. The projected image is reproduced by tracing the lines of the figure from the superimposed X, Y and Z coordinates.
Inventors
- 👤 J Ihms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:46
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/14; B43L13/149
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
135 words
A method for drafting perspective views of three dimensional objects depicted in drawings, said method comprising the steps of: A. laying the drawing upon a base plate; B. positioning a grid system adjacent said drawing; C. mounting a plurality of graduated poles at selected points on said grid; D. displaying an image of the structure produced in accordance with steps A-C, the angle and depth of said image corresponding to the perspective view to be drawn; E. tracing the X and Y axis dimensions of the object depicted by said drawing; and F. drawing a plurality of lines keyed to the vertical gradations of said poles, said plurality of lines determining the Z axis dimensions of the object depicted by said drawing; whereby, the combination of traced and drawn lines depict the object in perspective.
Claim 2
Independent Claim
135 words
A method for drafting perspective views of three dimensional objects depicted in drawings, said method comprising the steps of: A. laying the drawing upon a base plate; B. positioning a grid system adjacent said drawing; C. mounting a plurality of graduated poles at selected points on said grid; D. displaying an image of the structure produced in accordance with steps A-C, the angle and depth of said image corresponding to the perspective view to be drawn; E. tracing the X and Y axis dimensions of the object depicted by said drawing; and F. drawing a plurality of lines keyed to the vertical gradations of said poles, said plurality of lines determining the Z axis dimensions of the object depicted by said drawing; whereby, the combination of traced and drawn lines depict the object in perspective.
Claim 3
Independent Claim
127 words
A method for drafting perspective views of three dimensional objects depicted in drawings, said method comprising the steps of: A. laying the drawing upon a base plate; B. mounting a plurality of graduated poles at selected points on said grid; C. displaying an image of the structure produced in accordance with steps A-B, the angle and depth of said image corresponding to the perspective view to be drawn; D. tracing the X and Y axis dimensions of the object depicted by said drawing; and E. drawing a plurality of lines keyed to the vertical gradations of said poles, said plurality of lines determining the Z axis dimensions of the object depicted by said drawing; whereby, the combination of traced and drawn lines depict the object in perspective.
Claim 4
Independent Claim
127 words
A method for drafting perspective views of three dimensional objects depicted in drawings, said method comprising the steps of: A. laying the drawing upon a base plate; B. mounting a plurality of graduated poles at selected points on said grid; C. displaying an image of the structure produced in accordance with steps A-B, the angle and depth of said image corresponding to the perspective view to be drawn; D. tracing the X and Y axis dimensions of the object depicted by said drawing; and E. drawing a plurality of lines keyed to the vertical gradations of said poles, said plurality of lines determining the Z axis dimensions of the object depicted by said drawing; whereby, the combination of traced and drawn lines depict the object in perspective.
References Cited (Backward Citations)
US2915831A
Cited
US2835975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |