US3786567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for drawing the isometric perspective view of an object
Assignee: Individual
•
Filing: 1972-06-30
•
Granted: 1974-01-22
•
Expires: 1992-06-30
Abstract
Abstract Apparatus enabling the isometric perspective of an object to be drawn from flat views of the object, including a fixed support on which the flat views of the object are provided, a rotatable support for a drawing sheet and positionable in one of three positions spaced by 120*, a follower for following a flat view, a tracer displacable over the rotatable support and means linking the follower and tracer such that displacements of the follower in two perpendicular directions cause displacements of the tracer which are perpendicular but in the ratio of one over the square root of three, the linkage means for displacements in one reference direction comprising rotary means, the effective diameters if which are in the ratio of one over the square root of three.
Inventors
- 👤 P Dangay
- 👤 C Dangay
- 👤 J Dangay
- 👤 R Godard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:41
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/02; B43L13/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
246 words
Apparatus enabling the isometric perspective of an object to be drawn from flat views of the obJect including a fixed support on which flat views of the object to be drawn may be provided, a rotatable support for a drawing sheet, which may be placed in one of three angular positions spaced by 120*, a follower for following one of the flat views, a tracer which is displaceable over said rotatable support, and means linking said follower and said tracer such that displacements of said follower in two perpendicular reference directions cause displacements of said tracer which are perpendicular but in the ratio of one over the square root of three, wherein said linkage means between said follower and said tracer for displacements in that reference direction for which the displacements of said follower and said tracer are not equal comprises rotary means, the effective diameters of which are in the ratio to each other of one over the square root of three, said follower and said tracer being each mounted on a carriage movable along a rule which is movable perpendicularly to its length, said carriage of the follower carrying a member having an edge extending parallel to the plane of the table and oriented at 45* to the direction of displacement of the said carriage along said rule, the apparatus including a stop enabling said rule to be halted at a predetermined position and a locking device for immobilizing said carriage on said rule.
Claim 2
Dependent Claim
246 words
Apparatus enabling the isometric perspective of an object to be drawn from flat views of the obJect including a fixed support on which flat views of the object to be drawn may be provided, a rotatable support for a drawing sheet, which may be placed in one of three angular positions spaced by 120*, a follower for following one of the flat views, a tracer which is displaceable over said rotatable support, and means linking said follower and said tracer such that displacements of said follower in two perpendicular reference directions cause displacements of said tracer which are perpendicular but in the ratio of one over the square root of three, wherein said linkage means between said follower and said tracer for displacements in that reference direction for which the displacements of said follower and said tracer are not equal comprises rotary means, the effective diameters of which are in the ratio to each other of one over the square root of three, said follower and said tracer being each mounted on a carriage movable along a rule which is movable perpendicularly to its length, said carriage of the follower carrying a member having an edge extending parallel to the plane of the table and oriented at 45* to the direction of displacement of the said carriage along said rule, the apparatus including a stop enabling said rule to be halted at a predetermined position and a locking device for immobilizing said carriage on said rule.
Claim 3
Dependent Claim
28 words
Apparatus according to claim 1, wherein said member consists of a 45* set square attached to the said carriage so that its hypotenuse is parallel to the rules.
Claim 4
Dependent Claim
25 words
Apparatus according to claim 2, wherein the set square is attached to the carriage by means of springs which lift it relative to the table.
Claim 5
Dependent Claim
14 words
Apparatus according to claim 1, wherein said stop is adjustably mounted on said table.
Claim 6
Dependent Claim
10 words
Apparatus according to claim 4, wherein said stop is withdrawable.
Claim 7
Dependent Claim
17 words
Apparatus according to claim 5, wherein said stop is adapted to immobilise said rule by magnetic action.
Claim 8
Dependent Claim
20 words
Apparatus according to claim 6, wherein said stop includes an electro-magnet cooperating with a magnetic element carried by the rule.
Claim 9
Dependent Claim
18 words
Apparatus according to claim 1, wherein said locking device includes a locking shoe controlled by an eccentric shaft.
Claim 10
Dependent Claim
37 words
Apparatus according to claim 1, wherein the said follower-bearing carriage and said tracer-bearing carriage are coupled by a system of cables and drums and said locking device consists of a brake acting on one of the drums.
Claim 11
Dependent Claim
162 words
A method of height transfer using apparatus according to claim 1, comprising providing on said table a flat view of the object to be drawn for which the mutually parallel planes in which the lines to be drawn are situated are perpendicular to the plane of the said view, said view being oriented such that the direction of said planes is parallel to said 45* edge, said follower bearing rule against said stop, bringing said 45* into coincidence with the direction of one of said planes and locking said follower bearing carriage on said rule and then, by displacing said rule, transferring one or more points in this plane onto an auxiliary view on which the line or lines to be drawn appear in full-size, repeating the above process for each plane to draw an auxiliary view and, after release of said follower-bearing carriage, following this auxiliary view with the said follower, said tracer simultaneously drawing the perspective view of the object.
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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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |