US PATENT SUBCLASS 318 / 543
THREE-OR-MORE-POSITIONS MOTOR CONTROLLER SYSTEMS

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

543THREE-OR-MORE-POSITIONS MOTOR CONTROLLER SYSTEMS {6}
544  DF  .~> With other motor control device {1}
546  DF  .~> Plural, diverse or diversely controlled controllers {1}
548  DF  .~> Plural control stations
549  DF  .~> Return to "off", "starting" or "neutral" positions {1}
551  DF  .~> Knee- or foot-operated controllers
552  DF  .~> Power-actuated controllers {2}

DEFINITION

Classification: 318/543

(under the class definition) Subject matter in which the electric motor is controlled or regulated by a controller having three or more definite positions of control in which the degree or magnitude or kind of control at any one position differs substantially from that which is obtained when the controller is in either of at least two of the other positions.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism,

469, for miscellaneous control lever and linkage systems.

200, Electricity: Circuit Makers and Breakers,

1, 18, 19.06+ for multiple contact circuit makers and breakers.

307, Electrical Transmission or Interconnection Systems, 112, for miscellaneous switching systems.

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,

106, for electromagnetically operated switches of the plural contact type.

338, Electrical Resistors,

68, for mechanically variable electrical resistors, and especially subclass 185 for mechanically variable electrical resistors having intervening connectors between the contact and resistance element (e.g., taps) so that the resistance value changes in steps.

361, Electricity: Electrical Systems and Devices,

139, for miscellaneous relay circuits.