Procedure and apparatus for checking the straightness of elevator guide rails and straightening deflections
US5214947A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1991 |
| Grant date | Jun 1, 1993 |
| Priority date | — |
| Expiry date | Nov 27, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B5/285
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a procedure for checking the straightness of elevator guide rails and straightening deflections of the rails, and an apparatus for implementing the procedure. The elevator guide rails are inspected by means of a measuring apparatus movable along the rail, which apparatus includes two guides adapted to lean against the rail in longitudinally spaced relation to each other, by measuring the distance separating the measuring apparatus and guide rail. This distance measurement is taken, using the measuring device, at a point between the guides. The measured deflections are straightened, and the straightened areas are then checked, again by means of the measuring apparatus, to verify the results.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.