Patent US4946744A successfully refreshed from Google Patents.
Patent US4601110A successfully refreshed from Google Patents.
US4601110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixture device
Assignee: General Electric Co
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Filing: 1984-12-21
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Granted: 1986-07-22
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Expires: 2004-12-21
Abstract
Abstract An invention is disclosed for positioning an object wherein three point supports provide three contact points which define a first plane. Three additional point supports provide three additional contact points which are not coplanar with the first plane and which define a second plane. The first and second planes are nonperpendicular. The point supports accurately and repeatably position the object for optical measurement of a dimension of the object. The invention can be used in connection with the quality control testing of weldments which attach blade tips to gas turbine engine blades.
Inventors
- 👤 Charles W. Donaldson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:59
CPC Classifications
B; B23; B23Q; B23Q3/00; B23Q3/18; G; G01; G01B; G01B5/00; G01B5/0002; G01B5/0004; G01B5/20; G01B5/207
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
144 words
Apparatus for supporting an object at an accurately known position, comprising: (a) a bracket; (b) first, second, and third point supports for contacting the object at first, second, and third contact points, the three contact points defining a first plane; (c) fourth and fifth point supports for contacting the object at fourth and fifth contact points, the fourth and fifth contact points defining a line which is nonperpendicular to the first plane of (b); and (d) a sixth point support for contacting the object at a sixth contact point, the sixth contact point (i) being noncoplanar with the plane of (a), (ii) being noncolinear with the line of (c), and (iii) defining with the fourth and fifth contact points a second plane which is nonperpendicular with the plane of (b); the six point supports being located at predetermined positions with respect to the bracket.
Claim 2
Dependent Claim
144 words
Apparatus for supporting an object at an accurately known position, comprising: (a) a bracket; (b) first, second, and third point supports for contacting the object at first, second, and third contact points, the three contact points defining a first plane; (c) fourth and fifth point supports for contacting the object at fourth and fifth contact points, the fourth and fifth contact points defining a line which is nonperpendicular to the first plane of (b); and (d) a sixth point support for contacting the object at a sixth contact point, the sixth contact point (i) being noncoplanar with the plane of (a), (ii) being noncolinear with the line of (c), and (iii) defining with the fourth and fifth contact points a second plane which is nonperpendicular with the plane of (b); the six point supports being located at predetermined positions with respect to the bracket.
Claim 3
Dependent Claim
157 words
Apparatus for supporting a gas turbine engine blade which has a root having an upstream portion and a dovetail portion; a platform having a radially inner side; and an airfoil having a tip, a leading edge, and a low pressure side, comprising: (a) a bracket; (b) a spherical first support positioned at a first predetermined position with respect to the bracket for supporting the upstream portion of the root; (c) a spherical second support positioned at a second predetermined position with respect to the bracket for supporting the platform; (d) cylindrical third and fourth supports positioned at respective third and fourth predetermined positions with respect to the bracket for supporting the dovetail portion; (e) a cylindrical fifth support positioned at a fifth predetermined position with respect to the bracket for supporting the low pressure side; and (f) a cylindrical sixth support positioned at a sixth predetermined position with respect to the bracket for supporting the leading edge.
Claim 4
Dependent Claim
157 words
Apparatus for supporting a gas turbine engine blade which has a root having an upstream portion and a dovetail portion; a platform having a radially inner side; and an airfoil having a tip, a leading edge, and a low pressure side, comprising: (a) a bracket; (b) a spherical first support positioned at a first predetermined position with respect to the bracket for supporting the upstream portion of the root; (c) a spherical second support positioned at a second predetermined position with respect to the bracket for supporting the platform; (d) cylindrical third and fourth supports positioned at respective third and fourth predetermined positions with respect to the bracket for supporting the dovetail portion; (e) a cylindrical fifth support positioned at a fifth predetermined position with respect to the bracket for supporting the low pressure side; and (f) a cylindrical sixth support positioned at a sixth predetermined position with respect to the bracket for supporting the leading edge.
Claim 5
Dependent Claim
32 words
Apparatus according to claim 2 and further comprising a clamp for applying a force at one point on the blade for urging the blade into simultaneous contact with all of the supports.
Claim 6
Dependent Claim
53 words
Method of measuring a dimension of an object, comprising the steps of: (a) positioning the object in a fixture; (b) positioning the apex of a cone against the object; (c) projecting a sheet of light across the cone for eclipsing of the light; and (d) measuring the amount of light eclipsed in (c).
Claim 7
Dependent Claim
53 words
Method of measuring a dimension of an object, comprising the steps of: (a) positioning the object in a fixture; (b) positioning the apex of a cone against the object; (c) projecting a sheet of light across the cone for eclipsing of the light; and (d) measuring the amount of light eclipsed in (c).
References Cited (Backward Citations)
US2629936A
Cited
GB981222A
Cited
US3690160A
Cited
US3802255A
Cited
US3900738A
Cited
US4523850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |