Low power siren

Details Low power siren Low power siren

1981-03-23

1983-07-12

Caldwell, Sr., John W.

Communications: electrical

Audible indication

Pneumatic-type sound producer

340384R, G08B 300, G10K 704

Patent

active

043933742

ABSTRACT:
A low power siren having a high power sound and good tonal pattern. The siren consists of a casing with a motor and shaft protruding into a second casing. The inlet into the second casing allows for the passage of air, passing a rotor. Air cutters around the rotor merge with ribs which connect with a hub which is connected to the shaft. Air drawn through the inlet by rotation of the rotor passes the air cutters producing a noise.

REFERENCES:
patent: 2314260 (1943-03-01), Williamson
patent: 3069675 (1962-12-01), Parissi
patent: 4138673 (1979-02-01), Faust

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