Elevator – industrial lift truck – or stationary lift for vehicle – With closure means for shaft opening through landing
Patent
1996-11-07
1999-03-16
Young, Karen M.
Elevator, industrial lift truck, or stationary lift for vehicle
With closure means for shaft opening through landing
187316, B66B 1314
Patent
active
058818448
ABSTRACT:
A secondary positioning system for elevator car doors includes three sensors positioned in register with a plurality of openings formed within a door hanger. The unique spacing between the sensors in combination with unique spacing between each of the openings within the door hanger, allows determination of fully closed, fully opened, and intermediate positions and direction of elevator car doors.
REFERENCES:
patent: 4674604 (1987-06-01), Williams
patent: 5250765 (1993-10-01), Mizuno et al.
patent: 5495918 (1996-03-01), Peruggi et al.
patent: 5509504 (1996-04-01), McHugh et al.
Fargo Richard N.
Gentzler David K.
Murah Bennie
Thompson Garnett
Towey, Jr. James P.
Morse Gregory A.
Otis Elevator Company
Young Karen M.
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