Abstract: An organ key assembly having a loosely mounted switch actuator providing self-aligning movement of the actuator relative to the switch. The switch, in the illustrated embodiment, is a membrane switch. The actuator is arranged to slide across the switch in effecting the operation thereof. The actuator is associated with the key in such a manner as to permit the key to be moved from an undepressed, normal position to the fully depressed position, with a substantially constant force. The actuator defines a novel configuration for providing the self-aligning function and switch wiping operation. In the illustrated embodiment, the switch is provided as a portion of a printed circuit board. A support structure is provided for preventing deformation of the printed circuit board by the actuator biasing forces.

Abstract: An improved switch mechanism for controlling the actuation of a plurality of electrical switches by means of tablets of a musical instrument, such as an organ. The mechanism permits a plurality of tablets to be depressed simultaneously and releasably retained in the depressed position so as to maintain a selected actuation of switches such as for providing selected voicing circuits in an organ. The mechanism is arranged to cause an automatic release of any previously depressed tablet as an incident of the user depressing subsequently one or more tablets to the switch actuating position. The tablets may be biased to the switch releasing position with the mechanism permitting the biasing structure to return the tablets to the switch releasing position as an incident of such further tablet depression.