US PATENT SUBCLASS 73 / 579
.~ Resonance, frequency, or amplitude study

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

570  DF  VIBRATION {10}
579.~ Resonance, frequency, or amplitude study {4}
580  DF  .~.~> Including weight determination
581  DF  .~.~> Including axial force determination
582  DF  .~.~> Including structural bond evaluation
583  DF  .~.~> Of aircraft or related structural element

DEFINITION

Classification: 73/579

Resonance, frequency, or amplitude study:

(under subclass 570) Subject matter wherein the body is caused to vibrate at its natural mechanical resonance and measurement of frequency and/or amplitude at resonance is made; a study of amplitude response over a frequency range is made; nodal points, wave lengths, and standing wave characteristics are measured under predetermined vibration conditions.

SEE OR SEARCH THIS CLASS, SUBCLASS:

658+, for electrical indicating means for sonic sensing apparatus.