The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 1995
Filed:
Jun. 01, 1993
Bertram F Kupersmith, Avon, CT (US);
Venkataramana S Pullela, Singapore, SG;
Christopher P Screven, Torrington, CT (US);
Otis Elevator Company, Farmington, CT (US);
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 through a car-group bridge, and (c) a pair of redundant building buses, which exchange messages with a building controller, through a group-building bridge. Communication among all nodes on the car bus, group bus, and building bus occurs using a single protocol. Each communications element on a bus communicates with the bus using a communications coprocessor including a transmitter and a receiver.