US PATENT SUBCLASS 318 / 569
.~.~ Digital or numerical systems

Current as of: June, 1999
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318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

560  DF  POSITIONAL SERVO SYSTEMS (E.G., SERVOMECHANISMS) {23}
567  DF  .~ Program- or pattern-controlled systems {3}
569.~.~ Digital or numerical systems {1}
570  DF  .~.~.~> Contouring systems {4}

DEFINITION

Classification: 318/569

(under subclass 560) Subject matter including digital or numerical systems wherein the control system programming means utilizes numerical values, digital signals or coded pulses corresponding to desired positions of the control. Usually these numerical or digital signals are recorded on punched cards, punched tapes, magnetic tapes, or optical tapes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

600+, for digital servo systems, per se, where the input command is not necessarily from a program.