Brian D Ellsworth

US Patent:

53570642, Oct 18, 1994

Filed:

Dec 21, 1992

Appl. No.:

7/994227

Inventors:

Robert C. Boyce - Windsor CT
Brian D. Ellsworth - Tolland CT
David M. Hughes - New Britain CT
Bertram F. Kupersmith - Avon CT
Paul A. Stranieri - Bristol CT

Assignee:

Otis Elevator Company - Farmington CT

International Classification:

B66B 114
B66B 152

US Classification:

187247

Abstract:

A method and apparatus for dispatching elevator cars to hall calls in a system where there are two types of elevator controllers (12, 14) in operation, one (12) of which operates using relay logic. The calls are stored in a relay logic memory common to both elevator controllers (12, 14). A first controller reads the call information directly from the memory (18); the second controller reads the memory through a cross cancellation device (10) which multiplexes the information from the memory so that the calls are provided on a serial link (32) to the second controller (14). The second controller (14) is programmed to respond to calls which the first controller (12) has not answered.