Monitoring of elevator door reversal data

Details Monitoring of elevator door reversal data Monitoring of elevator door reversal data

1996-11-27

1998-10-06

Nappi, Robert

Elevator, industrial lift truck, or stationary lift for vehicle

With barrier for regulating access to load support

Includes motor or motor driven linkage for shifting barrier

187393, B66B 1314, B66B 134

Patent

active

058179933

ABSTRACT:
An elevator door reversal monitoring apparatus for monitoring an elevator door system comprises: a plurality of sensors for providing sensor signals; a door reversal state machine for providing door reversal data in response to the sensor signals; an output module for capturing the door reversal data; and an output processing module for determining a current state of the elevator door system in response to the captured door reversal data.

REFERENCES:
patent: 4568909 (1986-02-01), Whynacht
patent: 4622538 (1986-11-01), Whynacht et al.
patent: 4750591 (1988-06-01), Coste et al.
patent: 4930604 (1990-06-01), Schienda et al.
patent: 5445245 (1995-08-01), Ketoviita
Copy of U.S. Patent Application Ser. No. 08/738,667 entitled "Monitoring of Elevator Door Performance" filed Oct. 25, 1996, Ronald R. Pepin, et al.
Copy of U.S. Patent Application Ser. No. 08/740,601 entitled "Monitoring of Manual Elevator Door Systems" filed Oct. 31, 1996, Sanjay Kamani, et al.

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