Intruder alarm

Details Intruder alarm Intruder alarm

G - Physics

08

B

116/54

G08B 13/08 (2006.01)

Patent

CA 1097151

ABSTRACT OF THE DISCLOSURE An intruder alarm security device includes a source of fluid under pressure which serves as a medium for oscillating a diaphragm at the throat of a horn to create an audible warning signal. The intruder alarm includes an actuator, a plunger assembly and connecting structure for coupling rotary movement of the actuator to longitudinal movement of the plunger assembly to open communication between the diaphragm and the source of fluid. The coupling structure includes a lost motion connection so that the plunger assembly is controlled by the actuator only to the point of opening the communication. And, the plunger assembly includes an orifice member for metering the flow of medium to the diaphragm, yet, first is capable of allowing any entrained particulate from a closure of the source to clear the device.

316408

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