US PATENT SUBCLASS 388 / 838
.~.~ With plural selectable speeds (e.g., with manual switch, potentiometer


Current as of: June, 1999
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388 /   HD   ELECTRICITY: MOTOR CONTROL SYSTEMS

825  DF  OPEN LOOP SPEED CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR {3}
830  DF  .~ Analog armature control {7}
838.~.~ With plural selectable speeds (e.g., with manual switch, potentiometer {1}
839  DF  .~.~.~> By selecting impedance {2}


DEFINITION

Classification: 388/838

With plural selectable speeds (e.g., with manual switch, potentiometer):

(under subclass 830) Subject matter including means for selecting two or more speeds.

(1) Note. Speed selection may be either (1) continuous (e.g., using a potentiometer), or (2) discontinuous (e.g., using a multi-position mechanical switch).