This invention relates to devices for converting a small input force to a larger output force and particularly relates to devices and methods for converting an input force to an output force comprising: an arm rotatable about an axis of rotation where the axis of rotation is moveable between first and second positions; an input force for rotating and moving the arm about the axis of rotation between the first and second positions; structure for controlling the rotation of the arm, movement and position of the axis of rotation to generate a non-circular orbital segment of the arm to transfer an output force between the first and second positions.