US PATENT SUBCLASS 73 / 35.09
.~.~ Vibration

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

35.01  DF  ENGINE DETONATION (E.G., KNOCK) {4}
35.07  DF  .~ Specific type of detonation sensor {3}
35.09.~.~ Vibration {1}
35.11  DF  .~.~.~> Piezoelectric

DEFINITION

Classification: 73/35.09

Vibration:

(under subclass 35.07) Subject matter wherein the sensing means detects a rapid periodic motion of a body about an equilibrium position, which rapid periodic motion of the body is caused by detonation.

(1) Note. An acoustic detector for knock sensing is included here.

SEE OR SEARCH THIS CLASS, SUBCLASS:

570+, for other testing by vibration.