US PATENT SUBCLASS 318 / 685
.~.~ "Step-by-step" motors in closed-loop servos

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

560  DF  POSITIONAL SERVO SYSTEMS (E.G., SERVOMECHANISMS) {23}
671  DF  .~ With particular motor control system responsive to the "actuating signal" {10}
685.~.~ "Step-by-step" motors in closed-loop servos

DEFINITION

Classification: 318/685

(under subclass 671) Subject matter in which the particular motor control is used to control a "Step-by-step" or stepping motor; and the servo loop is closed by feeding back a position signal from the motor shaft back to the servo input.

SEE OR SEARCH THIS CLASS, SUBCLASS:

696, for "open-loop" stepping motor control systems.

SEE OR SEARCH CLASS

310, Electrical Generator or Motor Structure,

49, for the structure of stepping motors.