SYSTEM AND RELATED METHODS FOR SIGNALING THE POSITION OF A MOVABLE BARRIER AND SECURING ITS POSITION

摘要

A system for signaling the position of a movable barrier includes a movable barrier; a motor coupled to the movable barrier for moving the movable barri er between limit positions; a position detection device that monitors the movab le barrier to generate a barrier position signal; and an indication device that receives the barrier position signal and indicate a position of the movable barrier relative to the limit positions. The system also includes an operati on mechanism for controlling the motor and at least one transmitter device whic h generates a transmission signal received by the operator mechanism to energi ze the motor. The system further includes a blocking switch which generates a blocking Signal received by the operator mechanism to prevent receipt of a transmission signal from a device other than one associated with the indication device.