Backup position signaling in an elevator

Details Backup position signaling in an elevator Backup position signaling in an elevator

B - Operations, Transporting

66

B

364/23

B66B 5/02 (2006.01) B66B 1/34 (2006.01) B66B 3/02 (2006.01)

Patent

CA 1252582

Abstract Backup Position Signaling in an Elevator An elevator has a car position transducer that provides an output signal indicating car location. car controller causes that signal to be stored in a memory. The controller compares the stored signal with a current transducer output and stores the current signal when the difference between the two exceeds a preset amount. A detector senses the elevator system power level and connects a backup power supply to the memory and the tansducer when there is a power loss. A car motion detector senses the transducer output and removes the backup power from the transducer when the car stops moving.

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