System and methods for automatically moving access barriers initiated by mobile transmitter devices
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United States of America Patent
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May 15, 2012
Grant Date -
Jul 17, 2008
app pub date -
Mar 18, 2008
filing date -
Aug 24, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
An operator system provides a mobile transmitter configured to communicate with a base operator to automatically open and close an access barrier based on the position of a carrying device that maintains the mobile transmitter. The mobile transmitter periodically transmits a mobile open signal as it moves away from the reception range of the base operator until that signal is lost. When the base operator again receives the open signal, the access barrier is automatically opened. In addition, the mobile transmitter is configured to monitor the change in position of the carrying device as it moves away from the enclosure. When the angular and/or linear position of the carrying device changes by an amount greater than a predetermined threshold, the mobile transmitter automatically transmits a mobile close signal to the base operator to close the access barrier.
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