(under subclass 13) Apparatus comprising means to (1) cause an apparatus surface part which is associated with a separate and distinct moving surface to frictionally engage and control, retard or stop said moving surface or (2) cause two members to either engage or disengage to transmit or to prevent motion from one to the other.
SEE OR SEARCH THIS CLASS, SUBCLASS:
123, for clutch or brake surfaces which are manually actuated.
SEE OR SEARCH CLASS
477, Interrelated Power Delivery Controls, Including Engine Control, for interrelated control between a motor* and a transmission, clutch, or brake.