Abstract: A switch assembly particularly suitable for electrical keyboard applications includes a pair of wire conducting members disposed in substantially collinear relationship on a supporting base and defining a pair of switch contact surfaces disposed radially outward from the circumference of the wire conducting members. In one embodiment, surrounding the exterior of the collinearly disposed wire conducting members, and spaced from and in facing relationship with the contact surfaces thereof, lies a cylindrical or tubular contactor member. The contactor member may include a closely-wound electrically conductive wire. The contactor member is supported in spaced apart position by a resilient sealing tube which encloses the end portions, including the contact surfaces, of the wire conducting members. A spring biased actuating force is provided to move the sealing tube and contactor member into engagement with the contact surfaces.

Abstract: A miniaturized switch particularly suitable for electronic keyboard control applications has a pair of contact members providing spaced contacts, a conductive floating contactor disposed in the space between such contacts adapted to engage both of the contacts to close the switch, a resilient sleeve enclosing the contacts and the space therebetween to encircle the contactor, and actuator means to displace the contactor within the sleeve relative to the contacts to effect closing of the switch.

Abstract: An electric switch especially adapted for use in a variety of keyboard applications includes an elongated and generally straight wire beam spring which is fixedly supported at its ends in the switch housing with a center portion free to be flexed relative to the ends of the spring. The normal position of the wire beam spring has the center portion spaced from a pair of spaced contacts and an actuator mounted on the switch housing is depressed to flex this center portion from its normal position into engagement with the contacts and thereby close an electric circuit between such contacts.