US PATENT SUBCLASS 73 / 1.48
.~.~.~ Using sound sensor or piezoelectric vibration sensor

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

1.01  DF  INSTRUMENT PROVING OR CALIBRATING {13}
1.42  DF  .~ Timing apparatus (e.g., fuse, camera, or shutter) {2}
1.43  DF  .~.~ Chronometer (e.g., clock, watch, or watch unbalance) {5}
1.48.~.~.~ Using sound sensor or piezoelectric vibration sensor {2}
1.49  DF  .~.~.~.~> Plural watches or plural sensors
1.51  DF  .~.~.~.~> Resilient element

DEFINITION

Classification: 73/1.48

Using sound sensor or piezoelectric vibration sensor:

(under subclass 1.43) Subject matter wherein either (a) the apparatus for proving or calibrating the chronometer or (b) the chronometer being proven or calibrated includes either (1) a means having a characteristic which changes in response

to sound or (2) an element which produces electricity in response to pressure being applied thereto by a detection of vibration.

(1) Note. A tick detector, unless otherwise set forth, is found here.

SEE OR SEARCH THIS CLASS, SUBCLASS:

649+, for a vibration or sound testing sensor.