Autonomous elevator cab operation
US4308935A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1979 |
| Grant date | Jan 5, 1982 |
| Priority date | — |
| Expiry date | Dec 27, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/027
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An elevator includes a microprocessor-based cab controller mounted on the elevator car to monitor calls for service by passengers in the car, such as are registered on car call buttons requesting stops at specific floors, door open and door close buttons and the like, controls the opening and closing of the door, monitors the position of the car relative to an adjacent landing and communicates with a microprocessor-based car controller which is disposed at the top of the shaftway and controls the motion of the car in the shaftway and provides commands to the cab controller, such as door opening and closing demands relating to hall calls at the landings, and the like. In the event that the cab controller determines that it cannot rely on communications between it and the car controller, the cab controller operates in an autonomous mode in which it will accept the presence of the car near a landing for a predetermined time as an indication that the car door may be open to allow passengers to escape, open the door, shuts off the lights in the car and sounds a buzzer to frighten passengers out of the car, and after the door is open for a period of time, closes the door and determines i…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.