Patent ID: 7087849

Claim:
A control device for changing the state of a process upon initiation or cessation of angular forces from rotation of a machine driven shaft, comprising: a slip member arranged in a initial neutral position where the slip member rests while no angular forces are applied to the slip member; a rotational member situated in frictional communication with the slip member and being coupled directly or indirectly to the shaft and being rotatable in relation to the rotation of the shaft and upon rotation providing friction caused by angular force from the rotation of the rotational member, and the slip member being responsive to the friction; a biasing means retaining the slip member in the neutral position until the application of an angular force from the friction provided by rotation of the rotational member; a sensor on the slip member responsive to movement of the slip member out of or into the neutral position; and a switch operated by the sensor upon movement of the slip member out of or into the neutral position.