US PATENT SUBCLASS 123 / 353
.~.~.~.~ Having variable duty cycle multivibrator (e.g., length of "time on" in each cycle)

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

319  DF  ENGINE SPEED REGULATOR {16}
349  DF  .~ Having condition responsive means with engine being part of a closed feedback system (e.g., cruise control) {4}
350  DF  .~.~ Electrical sensing or regulating {3}
352  DF  .~.~.~ Engine speed sensing having an error signal producing circuit {7}
353.~.~.~.~ Having variable duty cycle multivibrator (e.g., length of "time on" in each cycle)

DEFINITION

Classification: 123/353

Having variable duty cycle multivibrator (e.g., length of "time on" in each cycle):

(under subclass 352) Subject matter in which the regulator employs an output of a variable duty cycle controlled oscillator to effect the speed regulation.

(1) Note. The oscillator or multivibrator operates at a constant frequency with regulation effected by varying the length or "on" time of the output control pulse.