Arrangement for detecting elevator car position
US5509505A · kind A · utility
33Cited by
13References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1995 |
| Grant date | Apr 23, 1996 |
| Priority date | — |
| Expiry date | Jan 13, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B1/40
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An arrangement for detecting elevator car position relative to a floor landing includes an optical potentiometer associated with both the elevator car and the interior of an elevator hoistway. One portion of the potentiometer is attached to the elevator car, while the other portion of the potentiometer is fixed within the hoistway. Car position is ascertained by illuminating portions of a fluorescent fiber optical cable and then reading electrical signals outputted by photodetectors at either end of the cable. The difference between the electrical signals corresponds to the distance of the elevator car from the landing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.