G - Physics – 08 – B
Patent
G - Physics
08
B
G08B 13/24 (2006.01) E05F 7/00 (2006.01)
Patent
CA 2713278
A tampering detection apparatus is used to determine the occurrence of unauthorized tampering with a barrier. At a tampering detection apparatus, a quantity during an operation of the movable barrier is sensed without actuating a magnetic switch. The quantity is potentially indicative of unauthorized tampering with the movable barrier. A determination is made as to whether the quantity is within a valid operating range. When the quantity is not within the valid operating range, a warning is issued to a user. The warning indicates a potential tampering with the movable barrier.
Talkington Thomas More
Vincent Daniel Marvin
Macrae & Co.
The Chamberlain Group Inc.
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