US PATENT SUBCLASS 446 / 204
.~.~ Whistle or siren

Current as of: June, 1999
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446 /   HD   AMUSEMENT DEVICES: TOYS

176  DF  OPERATED BY RELATIVELY MOVING FLUID OR PRESSURE DIFFERENTIAL {9}
202  DF  .~ Including mouthpiece for blowing or sucking {3}
204.~.~ Whistle or siren {2}
205  DF  .~.~.~> Including discrete relatively movable portions
206  DF  .~.~.~> Including distinct means for enabling selection of pitch

DEFINITION

Classification: 446/204

Whistle or siren:

(under subclass 202) Device including means utilizing the energy of the breath or fluid to produce sound and comprising either (1) a portion having a relatively small opening which affects the breath of fluid passing through it to cause the sound, or (2) a rotating member which produces rapid interruptions in the breath or fluid current to cause the sound.

SEE OR SEARCH CLASS

116, Signals and Indicators,

137+, for a mechanical signalling whistle; and subclass 147 for a mechanical signalling siren.

340, Communications: Electrical,

404+, for an electrically controlled siren or whistle.