Patent US4627170A successfully refreshed from Google Patents.
US4627170A
Expired / Lapsed
US
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Shaft guide alignment measurement
Assignee: Vaal Reefs Exploration and Mining Co Ltd
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Filing: 1985-10-17
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Granted: 1986-12-09
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Expires: 2005-10-17
Abstract
Abstract A conveyance guide alignment measuring device adapted to track along conveyance guides in a shaft, such as a lift shaft, comprises a substantially rigid frame, roller assemblies at either end of the frame and a sub-frame movably suspended from the frame. A pair of opposed roller assemblies are mounted in the sub-frame. The roller assemblies include a fixed assembly which engages a reference guide in the shaft and an outwardly biased assembly which engages an opposed conveyance guide. The sub-frame, being freely suspended, follows any misalignment in the guides and motion sensors are mounted to detect and measure relative motion of the frame, the sub-frame and the roller assemblies mounted on the sub-frame whereby predetermined alignment parameters of the conveyance guides may be determined.
Inventors
- 👤 Ronald M. K. McKechnie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:40
CPC Classifications
B; B66; B66B; B66B19/00; B66B19/002; B66B7/00; B66B7/12; B66B7/1207; B66B7/1246; E; E21; E21D; E21D7/00; E21D7/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
133 words
A conveyance guide alignment measuring device adapted to track along conveyance guides extending along a shaft comprising a substantially rigid frame, opposed roller assemblies at either end of the frame, the assemblies on one side of the frame being rigidly mounted on the frame for engagement with a reference guide and the assemblies opposed thereto on the other side of the frame being biased resiliently outwardly for engagement with a second guide, a sub-frame movably suspended from the frame and including a roller assembly rigidly mounted on the sub-frame for engagement with the reference guide and a roller assembly biased outwardly from the sub-frame for engagement with the second guide, and motion sensors mounted to detect and measure relative motion of the frame, the sub-frame and the roller assemblies mounted on the sub-frame.
Claim 2
Dependent Claim
133 words
A conveyance guide alignment measuring device adapted to track along conveyance guides extending along a shaft comprising a substantially rigid frame, opposed roller assemblies at either end of the frame, the assemblies on one side of the frame being rigidly mounted on the frame for engagement with a reference guide and the assemblies opposed thereto on the other side of the frame being biased resiliently outwardly for engagement with a second guide, a sub-frame movably suspended from the frame and including a roller assembly rigidly mounted on the sub-frame for engagement with the reference guide and a roller assembly biased outwardly from the sub-frame for engagement with the second guide, and motion sensors mounted to detect and measure relative motion of the frame, the sub-frame and the roller assemblies mounted on the sub-frame.
Claim 3
Dependent Claim
51 words
A measuring device according to claim 1 in which the roller assemblies mounted on the sub-frame are mounted in trucks which are freely movable with respect to the sub-frame, the motion sensors including at least one sensor adapted to determine and measure the relative movement of the trucks and the sub-frame.
Claim 4
Dependent Claim
59 words
A measuring device according to claim 2 in which the trucks include guide rollers and at least one measuring roller rotatably mounted on a resiliently inwardly biased axle which is movable relatively to the truck and the motion sensors including at least one sensor adapted to detect and measure relative movement of the measuring roller axle and the truck.
Claim 5
Dependent Claim
72 words
A measuring device according to claim 1 which is adapted to measure one or more of the following alignment parameters: straightness of the guides relatively to a first vertical plane intersecting the ideal vertical axes of the guides; the gauge between guides; straightness of the guides in planes at right angles to the first vertical plane; and vertical continuity of the joints between guides in both the first and the second planes.
Claim 6
Dependent Claim
19 words
A measuring device according to claim 1 in which the bias pressure of the biased roller assemblies is controllable.
Claim 7
Dependent Claim
16 words
A measuring device according to claim 1 in which the biased roller assemblies are pneumatically biased.
Claim 8
Dependent Claim
18 words
A measuring device according to claim 1 which is adapted to be suspended lengthwise below a shaft conveyance.
Claim 9
Dependent Claim
15 words
A measuring device according to claim 1 in which the frame is of a truss-configuration.
Claim 10
Dependent Claim
25 words
A measuring device according to claim 1 in which the length of the frame is of a length twice the spacing between shaft lining buntons.
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) | 1989-12-08 | 1990-06-09 | 1990-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-08 | 1994-06-09 | 1994-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-08 | 1998-06-09 | 1998-12-09 | $7700.00 | Window Closed / Lapsed |