US3678585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bow gauge for turbine engine vanes
Assignee: Chromalloy American Corp
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Filing: 1970-01-15
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Granted: 1972-07-25
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Expires: 1990-01-15
Abstract
Abstract A measuring instrument for determining variations in the bow of a turbine engine vane adjacent to its trailing edge. A dial gauge is slidably mounted on the instrument and has an operating stem whose contact wheel perpendicularly engages the top surface of the trailing edge section of the vane. The contact wheel is adapted to move along a straight line which theoretically lies in the flat tangent plane of the vane airfoil at its trailing edge. The actual vane surface is bowed from this theoretical line and the dial gauge will accordingly indicate variations in the vane bow, above and below this tangent plane.
Inventors
- 👤 Charles Dabrush
- 👤 Irving Strauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:54
CPC Classifications
B; B23; B23P; B23P6/00; B23P6/002; G; G01; G01B; G01B3/00; G01B3/22; G01B3/24; G01B5/00; G01B5/20; G01B5/205
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
185 words
An apparatus for determining variations in bow of an air foil vane having a trailing edge section defined as lying in a theoretically flat plane tangential to the curve of an air foil between the end buttress roots of the vane, comprising, a base, means for establishing the location of said theoretically flat plane including means for supporting the vane with its trailing edge section in the established flat plane, a support member pivotally mounted on said base and having a pair of fixed spaced arm means each having a contact point adapted to contact said vane adjacent its buttress roots, said arm means contact points defining a straight line, said support member being pivotally mounted on an axis perpendicular to said line whereby said plane is established and said straight line is located in said theoretically flat tangent plane, and indicator means having a vane contacting element, said indicator means slidably mounted on said support member, between said arm means, on a line parallel to the line connecting said points, for determining variations of said vane trailing edge section form said theoretically flat plane.
Claim 2
Independent Claim
185 words
An apparatus for determining variations in bow of an air foil vane having a trailing edge section defined as lying in a theoretically flat plane tangential to the curve of an air foil between the end buttress roots of the vane, comprising, a base, means for establishing the location of said theoretically flat plane including means for supporting the vane with its trailing edge section in the established flat plane, a support member pivotally mounted on said base and having a pair of fixed spaced arm means each having a contact point adapted to contact said vane adjacent its buttress roots, said arm means contact points defining a straight line, said support member being pivotally mounted on an axis perpendicular to said line whereby said plane is established and said straight line is located in said theoretically flat tangent plane, and indicator means having a vane contacting element, said indicator means slidably mounted on said support member, between said arm means, on a line parallel to the line connecting said points, for determining variations of said vane trailing edge section form said theoretically flat plane.
Claim 3
Dependent Claim
15 words
The apparatus as defined in claim 1 wherein said indicator means comprises a dial gauge.
Claim 4
Dependent Claim
54 words
The apparatus as defined in claim 2 wherein said means for supporting said vane comprises a plurality of vane support blocks having contact dowels mounted thereon, said dowels being so positioned and arranged as to position said vane adjacent said dial gauge for contact by said arm means whereby said flat plane is established.
Claim 5
Dependent Claim
19 words
The apparatus as defined in claim 3 including means for clamping said vane in position on said support blocks.
Claim 6
Dependent Claim
32 words
The apparatus as defined in claim 3 including means supporting said support blocks for lateral movement with respect to said dial gauge whereby said vane may be readily positioned on said blocks.
Claim 7
Dependent Claim
14 words
The apparatus as defined in claim 2 including means for calibrating said dial gauge.
Claim 8
Independent Claim
167 words
An apparatus for measuring variations in the bow of an airfoil vane having a trailing edge section defined as a flat plane tangential to the curve of the airfoil vane comprising, a base support plate, a vane support plate slidably mounted on said base plate and having a plurality of vane contact dowels mounted thereon for supporting said vane in position for bow measurement, a gauge support plate having a pair of spaced arm means having contact points for engaging said vane adjacent its buttress roots, said arm means defining a straight line between their respective contact points, said plate being pivotally mounted on said base plate for rotation about an axis extending perpendicular to said line whereby said flat tangential plane is established and said straight line is located in said tangential plane, and gauge means slidably mounted on said gauge support plate between said arms for determining variations of the trailing edge section of a vane supported on said dowels from said established tangential plane.
Claim 9
Independent Claim
167 words
An apparatus for measuring variations in the bow of an airfoil vane having a trailing edge section defined as a flat plane tangential to the curve of the airfoil vane comprising, a base support plate, a vane support plate slidably mounted on said base plate and having a plurality of vane contact dowels mounted thereon for supporting said vane in position for bow measurement, a gauge support plate having a pair of spaced arm means having contact points for engaging said vane adjacent its buttress roots, said arm means defining a straight line between their respective contact points, said plate being pivotally mounted on said base plate for rotation about an axis extending perpendicular to said line whereby said flat tangential plane is established and said straight line is located in said tangential plane, and gauge means slidably mounted on said gauge support plate between said arms for determining variations of the trailing edge section of a vane supported on said dowels from said established tangential plane.
Claim 10
Dependent Claim
81 words
The apparatus as defined in claim 7 wherein said gauge means comprises a dial gauge having a sliding operating stem and said contacting means comprises a vane contact wheel operatively associated with the free end of said stem, whereby as said gauge means is moved between said arms, said contact wheel moves said stem in response to variations in bow thereby to indicate variations in the actual location of the trailing edge section with respect to said established flat tangential plane.
Claim 11
Dependent Claim
14 words
The apparAtus as defined in claim 8 including means for calibrating said dial gauge.
Claim 12
Dependent Claim
39 words
The apparatus as defined in claim 8 wherein said dial gauge is calibrated and includes a dial face and indicator means, said face having indicia thereon to indicate the acceptable range of bow with respect to said flat plane.
Claim 13
Independent Claim
112 words
The method of determining bow in an airfoil vane having a theoretically flat trailing edge section lying in a plane tangential to the curve of the airfoil, comprising the steps of, establishing the location of a straight line chord width of said vane in said theoretically flat plane, and continuously determining the variations of the actual position of the surface of the theoretically flat trailing edge section of a vane with respect to said established theoretically flat plane by measuring the variation of the actual position of the surface of said trailing edge section along and from the location of said straight line chord width lying in the established theoretically flat plane.
Claim 14
Independent Claim
112 words
The method of determining bow in an airfoil vane having a theoretically flat trailing edge section lying in a plane tangential to the curve of the airfoil, comprising the steps of, establishing the location of a straight line chord width of said vane in said theoretically flat plane, and continuously determining the variations of the actual position of the surface of the theoretically flat trailing edge section of a vane with respect to said established theoretically flat plane by measuring the variation of the actual position of the surface of said trailing edge section along and from the location of said straight line chord width lying in the established theoretically flat plane.
Claim 15
Dependent Claim
59 words
The method as described in claim 11 wherein said step of determining includes the steps of, moving a dial gauge along said chord width in a plane perpendicular to said established theoretically flat plane whereby the operating stem of said gauge operatively engages said vane surface to provide a continuous indication on the dial gauge of said vane''s bow.
Claim 16
Dependent Claim
30 words
The method as described in claim 12 including the step of, calibrating said dial gauge to read zero when a point lying on said established theoretically flat plane is contacted.
Claim 17
Dependent Claim
35 words
The method as described in claim 13 including the steps of, calibrating said dial gauge and providing said dial face with a suitable indicia thereon to indicate variations from the acceptable range of vane bow.
References Cited (Backward Citations)
US1039901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |