US Patent 7974663 Mast-based detachable controller device

A self-contained controller device for electronic devices is described herein. The controller device includes a fixed central mast that extends into the controller and acts as the core structural component for the controller. The controller's user movable casing is pivotally mounted about the mast with a pivot point where the user movable casing and the mast meet that is located at or above the surface of the electronic device. The internal components of the controller device include movement detection and measurement circuitry, a self-centering mechanism attached to the fixed central mast, and wires connecting the movement detection and measurement circuitry through the mast to device connection point(s) on the electronic device.