System and related methods for signaling the position of a movable barrier and securing its position
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United States of America Patent
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Apr 24, 2007
Grant Date -
Jun 10, 2004
app pub date -
Dec 4, 2002
filing date -
Dec 4, 2002
priority date (Note) -
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Abstract
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 barrier between limit positions; a position detection device that monitors the movable 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 operation mechanism for controlling the motor and at least one transmitter device which generates a transmission signal received by the operator mechanism to energize 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.
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