US PATENT SUBCLASS 318 / 538
MOTOR STRUCTURE ADJUSTMENT OR CONTROL

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

538MOTOR STRUCTURE ADJUSTMENT OR CONTROL {3}
539  DF  .~> Both armature and field structures rotatable or adjustable
540  DF  .~> Rotor element movable axially
541  DF  .~> Brush or other current-collector control {1}

DEFINITION

Classification: 318/538

(under the class definition) Subject matter in which means are provided for relatively moving one or more structural elements of a motor relative to one or more other structural elements of an electric motor.

(1) Note. Mere motion of the working element of the motor relative to other parts of the motor as a result of normal excitation of the motor during the normal working cycle thereof are not included herein.

(2) Note. Where a motor having one type of normal working motion (e.g., rotary) also has another type of motion (e.g., axial movement) for producing some useful external work (e.g., operating a clutch lever to clutch the motor to some work load, but wherein the clutch is not claimed, but the several types of motions of the motor are claimed), classification is not herein but in some other appropriate subclass. See subclass 115. However, where a motor having one type of useful work motion, also has another type of movement of the working element for regulatory or control purposes for the motor, classification is in this subclass (538).

SEE OR SEARCH THIS CLASS, SUBCLASS:

115, for motor systems having a motor having plural, diverse types of motion of the working element of the motor. See (2) Note above.

136, for motor systems having auxiliary means for producing mechanical torque on the working element of a motor during the starting or accelerating period. 159, and the subclasses specified in the Notes to the definition of that subclass for motor systems having means for biassing the rotary working element of the motor against angular movement.

437, for phasing, or angular or linear position control of a motor wherein a motor element may be moved without energizing the motor.

491, and the subclasses specified in the Notes thereto, for this subject matter where the system also includes means for controlling the motor circuits.

830, for this subject matter in induction motors systems.

SEE OR SEARCH CLASS

310, Electrical Generator or Motor Structure, appropriate subclasses for structure of the motor, per se.

322, Electricity: Single Generator Systems,

49, for generator systems which are controlled by adjusting or varying the magnetic structure of the generator; see subclass 54 for generator systems wherein the generator control involves the current collecting mechanism.

388, Electricity: Motor Control Systems,

835+, for single motor running-speed control systems having combined control of motor structure and motor circuit.