The Chamberlain Group, Inc.

Kevin Pongrazzi

Christopher J Staub

George M Mehalshick

A remote unit ( ) couples to an obstacle detection sensor ( ) to both detect an obstacle in the path of a movable barrier ( ) and operability of the obstacle detection sensor ( ) itself. Information regarding these and, optionally, other parameters (such as battery status) is coded and transmitted as a short burst wireless transmission to an interface unit ( ). The interface unit ( ) decodes the message and provides controlling information to a movable barrier operator ( ) as appropriate when an obstacle is present, when the sensor ( ) is faulty, or when other monitored parameters are out of normal bounds. In addition, the interface unit ( ) can provide local alarms (auditory and visual) when detecting one or more of the above conditions.

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Beaver Meadows, PA, United States of America

Kevin Pongrazzi