Abstract: An optical encoder assembly including at least one light source or emitter element, at least one light detector or sensor element, at least one code member including a plurality of code elements arranged along a track extending along a plane with the emitter element and the sensor element positioned on a first side of the plane, and a reflector element positioned on an opposite second side of the plane and including a reflective surface having one or more collimating reflective surface features that reflect light emitted from the emitter element to the code element and on to the sensor element.

Abstract: An optical encoder for producing adjustable quadrature phased signals by positioning of a light-controlling member includes a light emitter including a non-collimated, point-source light emitting diode for emitting light and a light receiver that receives light from the light emitter. A light-controlling member is disposed between the light emitter and the light receiver and includes a plurality of transparent portions for passing light from the light emitter and a plurality of non-transparent portions disposed alternately with the transparent portions for blocking light from the light emitter. The light emitter and the light-controlling member are moveable relative to each other.

Abstract: An electrical device assembly, for mounting behind a wall surface, includes an electrical device mechanically attached to a mounting plate, and a rigid protector extending over the device to protect the device during wall construction. The hard metal protector enables an uninterrupted sheet of drywall or other wall facing material, hung in place over the device, to be cut through with a saw or router without risk of damaging the device by incidental contact with the cutting blade.