US3769709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indexing of plane shapes
Assignee: PROFILE IDENTIFICATION Ltd
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Filing: 1971-01-27
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Granted: 1973-11-06
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Expires: 1991-01-27
Abstract
Abstract A method of measuring and indexing plane shapes or profiles, particularly the profiles of dies for extruded shapes or sections. The measurements are taken in a form and manner suitable for recording in a computer memory. Thereby identification and retrieval of dies previously made and having shapes and sizes comparable with each other, are facilitated. Thereby also unnecessary duplication of dies may be avoided. Final comparison of shapes is made by visual inspection. Also a device for measuring plane shapes or profiles in accordance with the method.
Inventors
- 👤 E Clarke
- 👤 I Lindsay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:16
CPC Classifications
G; G01; G01B; G01B5/00; G01B5/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
120 words
A method of measuring a plane shape which comprises the steps i. of establishing a major axis as a line passing through the two furthest apart points on the outline of the plane shape, and establishing a minor axis as a line at a predetermined angle thereto, the line of the minor axis passing through that point on the outline of the plane shape which is the maximum distance from the major axis, to define an origin at the intersection of the two axes; and ii. of then measuring the lengths of the radius vectors along the lines of the axes from the origin to the outer periphery of the plane shape at various predetermined angular displacements about the origin.
Claim 2
Independent Claim
120 words
A method of measuring a plane shape which comprises the steps i. of establishing a major axis as a line passing through the two furthest apart points on the outline of the plane shape, and establishing a minor axis as a line at a predetermined angle thereto, the line of the minor axis passing through that point on the outline of the plane shape which is the maximum distance from the major axis, to define an origin at the intersection of the two axes; and ii. of then measuring the lengths of the radius vectors along the lines of the axes from the origin to the outer periphery of the plane shape at various predetermined angular displacements about the origin.
Claim 3
Dependent Claim
19 words
A method as claimed in claim 1, in which the major and minor axes are arranged at right angles.
Claim 4
Dependent Claim
40 words
A method as claimed in claim 1, wherein the radius vectors are the eight vectors defined by the lines of the major and minor axes, and by the lines of axes bisecting the angles between the major and minor axes.
Claim 5
Dependent Claim
54 words
A method as claimed in claim 1, wherein at least one further origin is provided by a further minor axis inter-secting the major axis, and wherein lengths of the radius vectors from the further origin to the outer periphery of the plane shape, are measured at predetermined angular displacements about the said further origin.
Claim 6
Dependent Claim
39 words
A method of indexing plane shapes, which includes the step of measuring a plane shape as claimed in claim 1, and of then taking up such measurements in an index together with similar measurements for other similar plane shapes.
Claim 7
Independent Claim
183 words
A method of selecting a die for the manufacture of an object of predetermined plane shape, which includes the steps i. of obtaining a projection of the object in the form of a plane shape; ii. of establishing a major axis as a line passing through the two furthest apart points on the outline of the plane shape, and establishing a minor axis as a line at a predetermined angle thereto, the line of the minor axis passing through that point on the outline of the plane shape which is the maximum distance from the major axis, to define an origin at the intersection of the two axes; iii. of then measuring the lengths of the radius vectors along the lines of the axes from the origin to the outer periphery of the plane shape at various predetermined angular displacements about the origin; iv. of comparing the measurements so taken with similar measurements of dies; and v. of selecting a die of suitable size and shape on the basis of such measurements for the manufacture of the said object of predetermined plane shape.
Claim 8
Independent Claim
183 words
A method of selecting a die for the manufacture of an object of predetermined plane shape, which includes the steps i. of obtaining a projection of the object in the form of a plane shape; ii. of establishing a major axis as a line passing through the two furthest apart points on the outline of the plane shape, and establishing a minor axis as a line at a predetermined angle thereto, the line of the minor axis passing through that point on the outline of the plane shape which is the maximum distance from the major axis, to define an origin at the intersection of the two axes; iii. of then measuring the lengths of the radius vectors along the lines of the axes from the origin to the outer periphery of the plane shape at various predetermined angular displacements about the origin; iv. of comparing the measurements so taken with similar measurements of dies; and v. of selecting a die of suitable size and shape on the basis of such measurements for the manufacture of the said object of predetermined plane shape.
References Cited (Backward Citations)
US1311995A
Cited
US2007589A
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US1415833A
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US2203674A
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US3340784A
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US3401458A
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |