Abstract: An encoder assembly including control knob return mechanisms and encoder elements. Each control knob return mechanism includes a frame assembly including return spring locators. A return rotor assembly, includes a rotor having a plurality of rotor located spring stops. A return mechanism rotatable shaft is operably positioned within the return rotor assembly and operably connectable to an encoder element. The rotor and the shaft are rotatably stationary relative to each other. A return spring is positioned about the rotatable shaft and operably positioned relative to the return spring locators and the rotor located spring stops to bias the return mechanism rotatable shaft and the rotor in a normally centered position. Each encoder element is connected to an associated return mechanism rotatable shaft of an associated control knob return mechanism, wherein the return mechanism rotatable shafts of the control knob return mechanisms are concentrically positioned relative to each other.

Abstract: An aircraft control panel assembly for attachment to an equipment rail of an aircraft. The aircraft control panel assembly includes a chassis assembly including at least one bore formed therein, the bore being at a first locking location. A retaining assembly, includes: a) at least one spring loaded pin assembly positioned within a portion of the at least one bore of the chassis assembly, the pin assembly including a pin element and a spring element arranged and constructed to be positionable within a pocket of an equipment rail of the aircraft, a spring element of the pin assembly biasing the pin element toward the pocket; b) a link member having a first end operably attached to the pin element; and, c) a pin retraction mechanism comprising a slider assembly for manipulating the link member so as to retract the pin element from the pocket. At least one positioning element is secured to the chassis at, at least one positioning location.

Abstract: A tool for laying out a pattern of a measured size and orienting the pattern with respect to an exterior point of reference is disclosed. A cord having a plurality of anchoring points spaced along its length is arrayed to form the pattern. A direction finding device orients the pattern formed by the cord to a point of reference exterior to the pattern. Anchoring devices anchor each anchoring point of the cord to a surface so that the cord is held to the surface in the shape of the pattern. The cord is attached to a spool which stows the cord, anchoring devices, and direction finding device when not deployed.

Abstract: A selector assembly for use in avionic multifunctional displays to perform quadrature and push button functions is described herein. The selector assembly utilizes two sensors and a cylindrical band with an encoder pattern having three distinct zones to sense either direction of rotation (quadrature) of a knob or its push motion. The pattern can include regions that are absorptive and reflective to infrared (IR) energy. The selector assembly uses the two sensors to sense a pattern rotation or a push motion of the pattern, thereby reducing the number of mechanical and sensing components and simplifying the wiring associated with the assembly. The encoder pattern is molded either directly on the inside of the knob or on a label that is adhered to the interior surface of the knob. The physical components and the sensors of the encoder mechanism are also placed within the knob of the selector assembly, thereby optimizing the useable glass surface area available for avionic displays.