Elevator control apparatus
US4653611A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1986 |
| Grant date | Mar 31, 1987 |
| Priority date | — |
| Expiry date | Jan 17, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/022
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A period of time required since the output signal of an acceleration detector for detecting an earthquake exceeds a first set level, until it reaches a second set level greater in value than the first set level, is measured, and a calculation is executed on the basis of the measured value thereby to predict the scale of the earthquake, and a resetting period of time since an elevator is brought to a stoppage operation due to the earthquake, until the stoppage operation is released, is calculated on the basis of the predicted scale of the earthquake. Thus, the period of time till the reset is automatically set is variable according to the scale of the earthquake.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.