(under subclass 40) Apparatus in which the means comprises a mass of solid material subject to a centrifugal force commensurate with the speed of rotation of the working member and movable in a direction to, per se, impede working fluid flow through the expansible chamber device when an optimum speed of working member rotation tends to be exceeded.
(1) Note. Included in this definition is an enlarged mass of solid material and any other element rigidly connected therewith.
