Abstract: An organ stop action valve mechanism is presented for controlling pipe or voice actuation with a pivotable control valve member which operates to depress a spring-loaded valve plunger. The control member pivots in an arcuate fashion either to close or to allow the valve to open. The valve is slidably positioned on a pair of guide pins and includes a leather cover to insure proper closing.

Abstract: Electrically and manually operable stop controls for a musical instrument such as an organ are disclosed. One embodiment of the stop control is a drawknob carried by an a transfer plate mounted for horizontal motion adjacent a solenoid having an iron core. Vertical hinge members at opposite ends of the solenoid support the transfer plate. A permanent magnet is mounted on each hinge member in general alignment with the iron core, the hinge members being spaced apart sufficiently to insure that only one permanent magnet at a time is adjacent the iron core, to thereby provide a manual magnetic and gravity-operated toggle motion. Application of an electrical direct current of selected polarity to the solenoid permits electrical shifting of the transfer plate. In a further embodiment, the drawknob is secured to a pivotally mounted armature having a cross-member which carries permanent magnets. Solenoids are mounted at opposite ends of the cross-member to provide electrical shifting of the armature.

Abstract: A drawknob for an organ is slidably mounted in an organ panel with one end thereof illuminated to indicate the state of the drawknob. A plate member is pivotally mounted relative to the other end of the drawknob and a spring device is provided for normally maintaining the plate member perpendicular to the longitudinal axis of the drawknob. One or more magnets are mounted on the plate member which are disposed between two magnetically operated switches. A restraint is provided adjacent the periphery of the plate member so that upon reciprocating movement of the drawknob in opposite directions the plate member will be pivoted to bring a magnet thereon into close proximity with one of the magnetically operated switches to operate the same.

Abstract: A stop control panel for an organ includes an elongated support panel on which modular groups of touch sensitive switches are disposed in pairs with an indicating lamp disposed between the switches of each pair, wherein the switches of the pair respectively actuate and de-actuate a given stop while the lamp indicates whether the stop is actuated. The touch sensitive switches are overlaid with a front surface layer through which the switches are operable by touch of the layer and through which the indicating lamps are observable when energized. The surface layer has printed thereon a plurality of color-contrasting outlines, each positioned to circumscribe a different pair of switches and associated indicating lamp to facilitate stop selection, the surface layer otherwise having a "dead front" appearance.

Abstract: A stop tab mechanism for an particularly electronic organ of the type having a capture combination system. The stop tab mechanism includes an elongated stop tab having a front portion, a central portion, and a rear portion, a mounting bracket for the stop tab, spaced apart front and rear rests secured to the mounting bracket, guide means mounting the central portion of the stop tab for pivotal movement relative to the rests, including a spring urging the central portion of the stop tab into contact with the front and rear rests, and switch means operatively connected to the rear portion of the stop tab.

Abstract: A stop tablet control system for an organ in which the "on" condition of selected stops is indicated by an illuminated light-emitting diode (L.E.D.) mounted in each stop tablet. The stop tablets are pivotally supported on a tablet rail and spring-biased to assume a neutral position from which they can be momentarily moved up or down against the action of the spring. When a tablet is momentarily pushed down from the neutral position a switch is closed to actuate circuitry which turns on the associated stop and energizes the L.E.D., and when the tablet is momentarily pushed up from the neutral position the associated stop is turned "off" and the L.E.D. extinguished. The system includes control circuitry for providing in a combination stop action mode an indication of what stops are playing.

Abstract: A stop tablet mechanism particularly suited for electric organs wherein a plurality of stop tablets lie in closely spaced apart side-by-side relation, the stop tablets being pivotally supported on a tablet rail and spring-biased to assume a neutral position from which they can be momentarily moved up or down against the action of the spring.

Abstract: A stop tablet mechanism particularly suited for electric organs wherein a plurality of stop tablets lie in closely spaced apart side-by-side relation, the stop tablets being pivotally mounted in a supporting frame by means of locating ears which are maintained in positive pivotal contact with the frame by pairs of wire springs, the wire springs engaging cam defining laterally projecting shoulders on the tablets and performing the additional function of maintaining the tablets in either of two positions of use, the spring elements being configured to provide flexibly mounted detent points which coact with the noses of the cam surfaces to maintain the tablet in its desired position of use.