US PATENT SUBCLASS 324 / 170
.~.~.~.~ High voltage speed signal type

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

160  DF  ELECTRICAL SPEED MEASURING {7}
166  DF  .~ Including speed-related frequency generator {5}
168  DF  .~.~ Including periodic switch {2}
169  DF  .~.~.~ In ignition system {1}
170.~.~.~.~ High voltage speed signal type

DEFINITION

Classification: 324/170

(under subclass 169) Subject matter wherein the speed measuring means is connected to the secondary circuit of the ignition system; the voltage fluctuations of the secondary circuit thereby producing the speed signal.