Anticipating overspeed governor

A speed responsive control device comprising speed responsive means for activating a member as a function of the speed of movement of said speed responsive means, acceleration responsive means for activating said member as a function of the acceleration of said speed responsive means, coupling means for moving the acceleration responsive means with the sp-ed responsive means, said coupling means including said member, wherein the movement of said speed responsive means is rotary movement, said coupling means rotating the acceleration responsive means with the speed responsive means, wherein said acceleration responsive means includes a flywheel adapted to be rotated with said member of said coupling means and cam means between said flywheel and said member for axially moving said member in response to an acceleration of said speed responsive means, wherein said cam means includes at least one cam slot in one of said flywheel and said member and at least one cam follower on the outer of said flywheel and said member and extending into said cam slot, said at least one cam slot including respective portions which are angled in opposite directions, and means for adjusting the axial position of the flywheel with respect to the member for positioning the at least one cam follower in a selected one of said respective angled portions of the at least one cam slot depending upon the direction of rotation of said speed responsive means, member and flywheel.