Elevator system
US4397377A · kind A · utility
14Cited by
4References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1981 |
| Grant date | Aug 9, 1983 |
| Priority date | — |
| Expiry date | Jul 23, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/0006
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An elevator system having a plurality of cars under group supervisory control by a programmable dispatcher. A monitor detects dispatcher failure via a plurality of tests which includes timing each hall call, and performing predetermined checks, tests and comparisons for each call related to actual system operating conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.