US3719995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for drafting an exact axonometric projection directly from a multiview orthographic projection
Assignee: Individual
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Filing: 1970-07-13
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Granted: 1973-03-13
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Expires: 1990-07-13
Abstract
Abstract An apparatus mounted on a drafting board for drafting an exact axonometric projection of an object directly from a multiview orthographic projection of such object. The apparatus includes at least two reference devices placed on the drafting board each adapted to be positioned along a running line extending from corresponding points of at least two views placed in their normal orientation in orthographic projection of such object and oriented at a predetermined angle from a reference in the direction of sight, and a tracing device associated with each reference device and defining an axonometric line oriented at an angle from such reference depending upon the desired angles of the axonometric projection. The intersection the axonometric lines derived from said two views in orthographic projection defines one point of the axonometric projection. There is also provided a guide member also placed on the drafting board and positioned along a directrix line perpendicular to the bisectrix of the angle formed by each reference and tracing devices for guiding the reference and tracing devices whereby movement of each reference device to positions corresponding to other corresponding points of such object in the multiview orthographic projection will define the corresponding points in the axonometric projection at the intersection of the tracing devices. In an alternative embodiment, the reference and tracing devices could be the same device pivotably mounted on supporting arm to oscillate between a reference position corresponding to a running line to a tracing position corresponding to an exometric line. The supporting arm is perpendicular to the guide member.
Inventors
- 👤 M Sauvageau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:04
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/14; B43L13/141
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
240 words
An apparatus adapted to be mounted on a drafting board for drafting an exact axonometric projection of an object directly from a multiview orthographic projection of said object comprising: a. at least two reference devices placed on the drafting board and each adapted to be positioned along a running line extending from corresponding points of at least two views in their normal orientation in orthographic projection of said object and oriented at a predetermined angle from a reference in the direction of sight; b. a tracing device connected to each reference device and defining an axonometric line oriented at an angle from said reference depending upon the desired angles of the axonometric projection, the intersection of the axonometric lines derived from said two views in orthographic projection defining one point of said axonometric projection; c. a guide means for sliably guiding each combination of reference and tracing devices, said guide means being also placed on the drafting board and positioned along a directrix line perpendicular to the bisectrix of the angle formed by each reference and tracing device, whereby movement of each reference device to positions corresponding to other corresponding points of such object in the multiview orthographic projection will define the corresponding points in the axonometric projection at the intersection of the tracing devices; and d. means adapted to be mounted on the drafting board for locating and securing the guide means at a definite angle from said reference.
Claim 2
Independent Claim
240 words
An apparatus adapted to be mounted on a drafting board for drafting an exact axonometric projection of an object directly from a multiview orthographic projection of said object comprising: a. at least two reference devices placed on the drafting board and each adapted to be positioned along a running line extending from corresponding points of at least two views in their normal orientation in orthographic projection of said object and oriented at a predetermined angle from a reference in the direction of sight; b. a tracing device connected to each reference device and defining an axonometric line oriented at an angle from said reference depending upon the desired angles of the axonometric projection, the intersection of the axonometric lines derived from said two views in orthographic projection defining one point of said axonometric projection; c. a guide means for sliably guiding each combination of reference and tracing devices, said guide means being also placed on the drafting board and positioned along a directrix line perpendicular to the bisectrix of the angle formed by each reference and tracing device, whereby movement of each reference device to positions corresponding to other corresponding points of such object in the multiview orthographic projection will define the corresponding points in the axonometric projection at the intersection of the tracing devices; and d. means adapted to be mounted on the drafting board for locating and securing the guide means at a definite angle from said reference.
Claim 3
Independent Claim
240 words
An apparatus adapted to be mounted on a drafting board for drafting an exact axonometric projection of an object directly from a multiview orthographic projection of said object comprising: a. at least two reference devices placed on the drafting board and each adapted to be positioned along a running line extending from corresponding points of at least two views in their normal orientation in orthographic projection of said object and oriented at a predetermined angle from a reference in the direction of sight; b. a tracing device connected to each reference device and defining an axonometric line oriented at an angle from said reference depending upon the desired angles of the axonometric projection, the intersection of the axonometric lines derived from said two views in orthographic projection defining one point of said axonometric projection; c. a guide means for sliably guiding each combination of reference and tracing devices, said guide means being also placed on the drafting board and positioned along a directrix line perpendicular to the bisectrix of the angle formed by each reference and tracing device, whereby movement of each reference device to positions corresponding to other corresponding points of such object in the multiview orthographic projection will define the corresponding points in the axonometric projection at the intersection of the tracing devices; and d. means adapted to be mounted on the drafting board for locating and securing the guide means at a definite angle from said reference.
Claim 4
Independent Claim
240 words
An apparatus adapted to be mounted on a drafting board for drafting an exact axonometric projection of an object directly from a multiview orthographic projection of said object comprising: a. at least two reference devices placed on the drafting board and each adapted to be positioned along a running line extending from corresponding points of at least two views in their normal orientation in orthographic projection of said object and oriented at a predetermined angle from a reference in the direction of sight; b. a tracing device connected to each reference device and defining an axonometric line oriented at an angle from said reference depending upon the desired angles of the axonometric projection, the intersection of the axonometric lines derived from said two views in orthographic projection defining one point of said axonometric projection; c. a guide means for sliably guiding each combination of reference and tracing devices, said guide means being also placed on the drafting board and positioned along a directrix line perpendicular to the bisectrix of the angle formed by each reference and tracing device, whereby movement of each reference device to positions corresponding to other corresponding points of such object in the multiview orthographic projection will define the corresponding points in the axonometric projection at the intersection of the tracing devices; and d. means adapted to be mounted on the drafting board for locating and securing the guide means at a definite angle from said reference.
Claim 5
Dependent Claim
44 words
An apparatus as defined in claim 1, wherein said reference and tracing devices are pivotally interconnected at one end, and further comprising a sliding member pivotally attached to the other end of said reference and tracing device and slidably mounted on said guide member.
Claim 6
Dependent Claim
35 words
An apparatus as defined in claim 2, wherein the cross-section of said guide member is circular thereby permitting rotation of said sliding members around said guide members and pivotal of such reference and tracing devices.
Claim 7
Dependent Claim
25 words
An apparatus as defined in claim 2, further comprising means for fixing the angular position of said tracing device with respect to said reference device.
Claim 8
Dependent Claim
46 words
An apparatus as defined in claim 4, wherein said means for fixing the angular position of said tracing device with respect to said reference device includes a rod slidably mounted through said sliding members and means for locking said rod with respect to said sliding members.
Claim 9
Dependent Claim
46 words
An apparatus as defined in claim 1, wherein the angles of the running lines and of the directrix lines may be determined graphically, calculated or read directly from tables, and depend upon the angles of said axonometric projection and the direction of sight of said object.
Claim 10
Dependent Claim
24 words
An apparatus as defined in claim 1, wherein said guide member is graduated for indicating the angle subtended by said reference and tracing devices.
Claim 11
Dependent Claim
35 words
An apparatus as defined in claim 7, wherein the angle subtended by said reference and tracing devices corresponds to the subtraction of the angles of the running lines from the angles of the axonometric lines.
Claim 12
Independent Claim
271 words
An apparatus adapted to be mounted on a drafting board for drafting an exact axonometric projection of an object directly from a multiview orthographic projection of said object comprising: a. at least two T shaped members placed on the drafting board; b. a gracing device pivoted at the end of the leg of each T shaped member and adapted to be moved from a reference position coinciding with each running line extending from corresponding points of at least two views in their normal orientation in orthographic projection to a tracing position corresponding to an axonometric line oriented at an angle from said reference depending upon the desired angles of the axonometric projection, the intersection of the axonometric lines corresponding to the positions taken by the tracing devices defining one point of said axonometric projection; c. a guide member for guiding each T shaped member, said guide member being also placed on the drafting board and positioned along a directrix line perpendicular to the bisectrix of the angle formed by the tracing device during its angular displacement from said reference to said tracing positions, whereby movement of each T-shaped member will permit the positioning of the tracing devices to reference positions corresponding to other corresponding points of said object in the multiview orthographic projection in order to define, when the tracing devices are moved to their tracing positions, the corresponding points in the axonometric projection at the intersection of the axonometric lines defined by the tracing devices, and d. means adapted to be mounted on the drafting board for locating and securing the guide members at a definite angle from said reference.
Claim 13
Independent Claim
271 words
An apparatus adapted to be mounted on a drafting board for drafting an exact axonometric projection of an object directly from a multiview orthographic projection of said object comprising: a. at least two T shaped members placed on the drafting board; b. a gracing device pivoted at the end of the leg of each T shaped member and adapted to be moved from a reference position coinciding with each running line extending from corresponding points of at least two views in their normal orientation in orthographic projection to a tracing position corresponding to an axonometric line oriented at an angle from said reference depending upon the desired angles of the axonometric projection, the intersection of the axonometric lines corresponding to the positions taken by the tracing devices defining one point of said axonometric projection; c. a guide member for guiding each T shaped member, said guide member being also placed on the drafting board and positioned along a directrix line perpendicular to the bisectrix of the angle formed by the tracing device during its angular displacement from said reference to said tracing positions, whereby movement of each T-shaped member will permit the positioning of the tracing devices to reference positions corresponding to other corresponding points of said object in the multiview orthographic projection in order to define, when the tracing devices are moved to their tracing positions, the corresponding points in the axonometric projection at the intersection of the axonometric lines defined by the tracing devices, and d. means adapted to be mounted on the drafting board for locating and securing the guide members at a definite angle from said reference.
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |