Amusement devices: toys – Operated by relatively moving fluid or pressure differential – Sounding
Patent
1996-05-03
1998-05-05
Hafer, Robert A.
Amusement devices: toys
Operated by relatively moving fluid or pressure differential
Sounding
446215, 446397, 84330, A63H 500
Patent
active
057466408
ABSTRACT:
A motion-activated musical device is disclosed which sounds harmonic overtones of a longitudinal resonator. Swinging the device causes the formation of a pressure differential across the device. This pressure differential causes air to flow through the longitudinal resonator, initiating an oscillation in the hole tone resonator. A standing wave is then established in the longitudinal resonator in response to this oscillation and a musical tone results. Variations in motion cause the device to sound a sequence of harmonically related musical tones.
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Carlson Jeffrey D.
Hafer Robert A.
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