Patent ID: 7637352
Filing Date: 2009-12-29
Classification: B66B

Abstract:
1. An elevator control system for controlling the movement of an elevator car up and down an elevator shaft between floors of a structure comprising: a call input device provided on each floor to indicate a passenger is waiting to be picked-up; a measuring device to indicate a load on the elevator car; a controller to answer calls from the call input devices and move the elevator between floors, wherein the controller overrides calls received from the call input devices and does not stop the car to pick up passengers when the measuring device indicates a load indicative of a full car with no room for additional passengers; wherein the measuring device includes a force transducer connected to an amplifier circuit connected to an over voltage protection circuit, wherein an output of the over voltage protection circuit is provided to the controller to indicate a full car with no room for additional passengers; and wherein a Wheatstone bridge provides a voltage difference generated by the Wheatstone bridge that indicates the force placed on the force transducer by the passengers within the elevator car.