US PATENT SUBCLASS 374 / 117
.~ By a vibratory effect (e.g., resonant frequency, acoustical)

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

100  DF  TEMPERATURE MEASUREMENT (E.G., THERMOMETER) {13}
117.~ By a vibratory effect (e.g., resonant frequency, acoustical) {2}
118  DF  .~.~> Resonant frequency by fluid flow
119  DF  .~.~> Vibration velocity (e.g., echo timing)

DEFINITION

Classification: 374/117

By a vibratory effect (e.g., resonant frequency, acoustical):

(under subclass 100) Subject matter wherein the temperature is determined by a parameter of a mechanical vibration.

(1) Note. The mechanical vibration may be an acoustical wave.

(2) Note. The parameter may be the frequency of mechanical or acoustic resonance of an element.

(3) Note. A temperature-responsive crystal controlling an oscillator in a thermometer is classified herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

163+, for other thermometers having an oscillator,

particularly 170+, for digital output thermometers.

SEE OR SEARCH CLASS 73, Measuring and Testing,

570+, for testing by, or measurement or testing of, vibratory waves.

331, Oscillators,

66, for a temperature controlled oscillator absent an indicating arrangement.