Pressure-responsive security alarm

Details Pressure-responsive security alarm Pressure-responsive security alarm

G - Physics

08

B

215/14, 116/48

G08B 13/20 (2006.01) G08B 13/04 (2006.01) G08B 13/08 (2006.01) E05G 1/00 (2006.01) E05G 1/10 (2006.01)

Patent

CA 1278225

Abstract of the Disclosure Apparatus is provided to evacuate an air- tight openable and closeable container to a sub- atmospheric pressure. A flexible diaphragm inside the container responds to a change in pressure to actuate an alarm. In one embodiment, a display case is evacu- ated via a one-way valve by connecting a pump thereto. In a different embodiment, a pump inside a hand-carried case evacuates the case via a one-way valve. Alter- natively, at least one side of the case is flexible enough to evacuate the case by pushing thereon, with no pump being required.

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