US PATENT SUBCLASS 254 / 267
.~.~ Having rotational speed governor for generating control impulse to rotation retarding means or drive

Current as of: June, 1999
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254 /   HD   IMPLEMENTS OR APPARATUS FOR APPLYING PUSHING OR PULLING FORCE

264  DF  APPARATUS FOR HAULING OR HOISTING LOAD, INCLUDING DRIVEN DEVICE WHICH CONTACTS AND PULLS ON CABLE {4}
266  DF  .~ Device includes rotatably driven, cable contacting drum {34}
267.~.~ Having rotational speed governor for generating control impulse to rotation retarding means or drive

DEFINITION

Classification: 254/267

Having rotational speed governor for generating control impulse to rotation retarding means or drive:

(under subclass 266) Apparatus wherein the driven device also includes a governor, directly responsive to the rotational speed or variations in the rotational speed of the drum, and which generates a force which is transmitted to and regulates the operation of either (a) means for retarding the rotation of, (e.g., frictional brake) or (b) the drive for, (e.g., motor, clutch) the drum.

(1) Note. The speed governor of this subclass does not form an active portion of the drive train used to transmit power from the source to the drum.

SEE OR SEARCH CLASS

173, Tool Driving or Impacting,

4+, for tool advancing means controlled by automatic control.

175, Boring or Penetrating the Earth,

7, for boring a submerged formation from a floating support with a submerged independent anchored guide base; and subclasses 24+ for automatic controls for boring apparatus. 182, Fire Escape, Ladder, or Scaffold,

37, 142+, 231+, and 236+ for apparatus having a strand contacting reel which is used in a fire escape or scaffold and either pulls on the strand or retards the descent of the portion of the strand supporting an occupant.

187, Elevator, Industrial Lift Truck, or Stationary Lift for Vehicle,

305, for an elevator having a control mechanism, the operation of which is dependent upon the speed of the car.

188, Brakes,

180+, for speed-responsive brakes.