US3867762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drawing instrument
Assignee: Individual
•
Filing: 1972-07-14
•
Granted: 1975-02-25
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Expires: 1992-07-14
Abstract
Abstract This instrument is a drawing instrument for drafting axonometric projection drawings based on a projection drawn by the multiview projection, with which any of projection drawings, either isometric, dimetric or trimetric, may be produced by the operations of rulers.
Inventors
- 👤 Akira Hirano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:14
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/14; B43L13/141; B43L13/143
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
221 words
A drawing instrument for use in drafting the anonometric projection drawing from the multiview projection drawing, comprised of the following components; a. a parallel transferring mechanism with which a ruler orienting and arranging means is transferred parallel to itself and the angle changing mechanism with which the ruler arranging means angle is altered; b. a horizontal ruler attached to the arranging means of the drawing instrument; c. a vertical ruler attached to the arranging means of the drawing instrument at a right angle to the horizontal ruler and provided with the standard line extending traversely thereof near the free end and making an angle of inclination of 75* to the ruler edge face, said vertical ruler having a stopper member located thereon near the arranging means; d. an auxiliary ruler pivotally mounted on an end of said arranging means for independent rotation relative to said vertical and horizontal rulers, the position of said pivotal mounting being at a location on said arranging means remote from said attachment of said horizontal and vertical rulers such that they extend in substantially opposite directions; e. an angular ruler arranged to sliding engage said horizontal ruler and said stopper for drawing a line at a certain angle from a definite point on the ruler face and located adjacent to said auxiliary ruler and slidable therealong.
Claim 2
Dependent Claim
221 words
A drawing instrument for use in drafting the anonometric projection drawing from the multiview projection drawing, comprised of the following components; a. a parallel transferring mechanism with which a ruler orienting and arranging means is transferred parallel to itself and the angle changing mechanism with which the ruler arranging means angle is altered; b. a horizontal ruler attached to the arranging means of the drawing instrument; c. a vertical ruler attached to the arranging means of the drawing instrument at a right angle to the horizontal ruler and provided with the standard line extending traversely thereof near the free end and making an angle of inclination of 75* to the ruler edge face, said vertical ruler having a stopper member located thereon near the arranging means; d. an auxiliary ruler pivotally mounted on an end of said arranging means for independent rotation relative to said vertical and horizontal rulers, the position of said pivotal mounting being at a location on said arranging means remote from said attachment of said horizontal and vertical rulers such that they extend in substantially opposite directions; e. an angular ruler arranged to sliding engage said horizontal ruler and said stopper for drawing a line at a certain angle from a definite point on the ruler face and located adjacent to said auxiliary ruler and slidable therealong.
Claim 3
Dependent Claim
31 words
A drawing instrument, as defined in claim 1, wherein the angular ruler is a triangular ruler with its base and legs at predetermined angles, and adapted to function with the stopper.
Claim 4
Dependent Claim
20 words
A drawing instrument, as defined in claim 2, wherein the triangular ruler has interior angles of 30*, 60* and 90*.
References Cited (Backward Citations)
US2454380A
Cited
US3685156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |