Abstract: A hand held remote control device that allows a user to select the position and movement of a cursor on a display screen or other selected functions by rotating or translating the input device in three-dimensional space. A signal is emitted from a beacon at a first location and is received by the remote control device at a second location. The remote control device detects, about two non-parallel axes, components of an angular displacement between the incident direction of the signal and a selected axis of the remote control device. Optical structures, such as cylindrical lenses, are used to project portions of the signal onto detectors in order to measure the angular displacement. Information corresponding to the detected angular displacement is transmitted to a control box, which controls the position and movement of the cursor on the display screen in response to the transmitted information.

Abstract: A power interrupt switching device for independently controlling normal and remote loads from a single control switch. The device includes an edge detector, an energy storage element, and a latch. When power is applied to the switching device, the edge detector detects the power transition and generates an output pulse for a predetermined time. The storage element charges and generates an output after a second predetermined time greater than the first. Consequently, both outputs are not present simultaneously upon the first application of power. If power is interrupted momentarily and then reapplied, the edge detector again generates an output while the storage element maintains its output during the interruption. With both outputs present, the latch is triggered to deliver power through the switching device to a remote load. The latch remains closed until power is removed.