US4459754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measuring interior sheave groove dimensions
Assignee: Otis Elevator Co
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Filing: 1982-06-23
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Granted: 1984-07-17
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Expires: 2002-06-23
Abstract
Abstract A metal tape containing diameter graduations along the tape is wrapped around the groove in a sheave. The tape contains spaced apart supports which precisely position the tape at a certain depth in the groove. The intersection of the two ends of the tape indicate the diameter of the groove. The ends have vernier graduations.
Inventors
- 👤 Kentaro Yasuda
- 👤 Albert J. Saxer
- 👤 Janis J. Cilderman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:35
CPC Classifications
G; G01; G01B; G01B5/00; G01B5/02; G01B5/025; G01B3/00; G01B3/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
69 words
A device for measuring a groove dimension in a grooved sheave, characterized by: a length of thin tape which contains graduations along its length; and spacers which are spaced apart along one surface of the tape for supporting the tape in the groove, each spacer having a cross-sectional contour which is congruous with the groove at a certain predetermined groove depth at which the measurement is to be made.
Claim 2
Independent Claim
69 words
A device for measuring a groove dimension in a grooved sheave, characterized by: a length of thin tape which contains graduations along its length; and spacers which are spaced apart along one surface of the tape for supporting the tape in the groove, each spacer having a cross-sectional contour which is congruous with the groove at a certain predetermined groove depth at which the measurement is to be made.
Claim 3
Dependent Claim
14 words
A device according to claim 1, characterized in that the spacers are substantially hemispherical.
Claim 4
Independent Claim
125 words
A method for obtaining a dimension of a grooved sheave, characterized by the steps: (a) beginning with one of two ends of a length of thin graduated tape, comprising spacers which are located along one surface of the tape for supporting the tape in the groove, each spacer having a cross-sectional contour which is congruous with the groove at a certain predetermined groove depth, wrapping the tape 360° around the entire circumference of the groove so that one end intersects with a portion of the tape that is not wrapped around the groove; (b) holding the tape so that each spacer registers with the groove; and (c) reading a graduation on the tape where the one end of the tape and the unwrapped portion intersect.
Claim 5
Independent Claim
125 words
A method for obtaining a dimension of a grooved sheave, characterized by the steps: (a) beginning with one of two ends of a length of thin graduated tape, comprising spacers which are located along one surface of the tape for supporting the tape in the groove, each spacer having a cross-sectional contour which is congruous with the groove at a certain predetermined groove depth, wrapping the tape 360° around the entire circumference of the groove so that one end intersects with a portion of the tape that is not wrapped around the groove; (b) holding the tape so that each spacer registers with the groove; and (c) reading a graduation on the tape where the one end of the tape and the unwrapped portion intersect.
Claim 6
Independent Claim
174 words
A method for servicing a multigrooved sheave, characterized by the steps: (a) measuring the diameter of each groove; (b) reducing the diameter of each groove to the smallest measured diameter by rotating the sheave and guiding a cutting tool into the groove for a depth that equals the difference between the smallest diameter and the diameter of the groove; said step (a) comprising: (c) beginning with one of two ends of a length of thin graduated tape, comprising spacers which are located along one surface of the tape for supporting the tape in the groove, each spacer having a cross-sectional contour which is congruous with the groove at a certain predetermined groove depth, wrapping the tape 360° around the entire circumference of the groove so that one end intersects with a portion of the tape that is not wrapped around the groove; (d) holding the tape so that each spacer registers with the groove; and (e) reading a graduation on the tape where the one end of the tape and the unwrapped portion intersect.
Claim 7
Independent Claim
174 words
A method for servicing a multigrooved sheave, characterized by the steps: (a) measuring the diameter of each groove; (b) reducing the diameter of each groove to the smallest measured diameter by rotating the sheave and guiding a cutting tool into the groove for a depth that equals the difference between the smallest diameter and the diameter of the groove; said step (a) comprising: (c) beginning with one of two ends of a length of thin graduated tape, comprising spacers which are located along one surface of the tape for supporting the tape in the groove, each spacer having a cross-sectional contour which is congruous with the groove at a certain predetermined groove depth, wrapping the tape 360° around the entire circumference of the groove so that one end intersects with a portion of the tape that is not wrapped around the groove; (d) holding the tape so that each spacer registers with the groove; and (e) reading a graduation on the tape where the one end of the tape and the unwrapped portion intersect.
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) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |