Intruder alarm

Details Intruder alarm Intruder alarm

1978-05-09

1979-09-04

Yasich, Daniel M.

Signals and indicators

Alarms

Burglar

116112, 222 39, G08B 1308

Patent

active

041664280

ABSTRACT:
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 or connecting 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.

REFERENCES:
patent: 3091365 (1963-05-01), Horner et al.
patent: 3247824 (1966-04-01), Rodgers
patent: 3352456 (1967-11-01), Swineford
patent: 3512499 (1970-05-01), Runde et al.
patent: 3690286 (1972-09-01), Gantt

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