System for position loss recovery for an elevator car
US5631452A · kind A · utility
7Cited by
13References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1994 |
| Grant date | May 20, 1997 |
| Priority date | — |
| Expiry date | Aug 18, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B1/3492
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system for position loss recovery for an elevator car includes a plurality of pairs of encoded floor magnets that uniquely identify each floor. Upon restoration of power, the encoded floor magnets are sensed by an encoded floor sensor and the precise floor location of the elevator car is determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.