Local area network eleveator communications network
US5360952A · kind A · utility
22Cited by
8References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1993 |
| Grant date | Nov 1, 1994 |
| Priority date | — |
| Expiry date | Jun 1, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/46
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A LAN elevator network includes (a) a pair of redundant car buses for exchanging signals with car control system elements, (b) a pair of redundant group buses for exchanging signals with the redundant car buses by means of a car-group bridge, and (c) with a pair of redundant building buses, which exchange messages with a building controller, by means of a group-building bridge. Communication among all nodes on the car bus, group bus, and building bus occurs by means of a single protocol. Each communications element on a bus communicates with the bus by means of a communications coprocessor including a transmitter and a receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.