Electromagnetic/ultrasonic roll-calling/answering (EURA)...

Details Electromagnetic/ultrasonic roll-calling/answering (EURA)... Electromagnetic/ultrasonic roll-calling/answering (EURA)...

2003-05-30

2009-02-24

Salata, Jonathan (Department: 2837)

Elevator, industrial lift truck, or stationary lift for vehicle

With monitoring, signalling, and indicating means

Monitors operational parameter

C187S247000

Reexamination Certificate

active

07493991

ABSTRACT:
A positioning system for an elevator cab (37) includes transponder modules (10) having a unique ID for receiving a signal (39) and emitting an ultrasonic signal when the signal is equivalent to the unique ID with a determination of position based on the time duration of the signals.

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