Speed control apparatus for elevator system
US4269286A · kind A · utility
11Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1979 |
| Grant date | May 26, 1981 |
| Priority date | — |
| Expiry date | Feb 26, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B1/30
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A speed control apparatus for elevator system which controls a speed of a cage through a main rope under controlling a motor by a speed control system comprising an acceleration feedback circuit, comprises a detection circuit for detecting a speed or a position of the cage which is vibrated under corresponding a frequency of an outer disturbance to a resonance frequency of the main rope and a command circuit for increasing a gain of the acceleration feedback circuit by the output of the detection circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.