Abstract: A keyswitch includes a tubular plunger with a rectangular body slidably mounted in a rectangular housing that has a bottom wall provided in its top with a circular recess receiving the lower end of a coil spring extending up around a pair of upright spring contact strips, the lower ends of which are press fitted in the bottom wall. The inside of the plunger is provided with a cross member that normally separates the upper ends of the contact strips, but permits them to engage each other when a keycap on the upper end of the plunger is pushed down to lower the plunger. The plunger body has legs extending downwardly from its lower corners which engage the area of the housing between the plunger body and bottom wall of the housing while the plunger is in its upper position. The corners of the bottom walls are provided with downwardly extending sockets for receiving the plunger legs when the keycap is depressed.

Abstract: A switch housing covering an elongated base has a top wall spaced from a plurality of fixed contacts mounted along the base for engagement by a bridging contact carried by a slider inside the housing. The top wall of the housing is provided with a slot extending inwardly from one end and having a pair of side walls formed from downturned areas of the top wall, each of which is provided with an upwardly extending notch. A lever disposed in the slot normally extends above the housing, with the lower end of the lever provided with laterally projecting trunnions extending through the side wall notches. The lower end of the lever outwardly beyond the trunnions extends downwardly into engagement with the end of the slider for pushing the slider toward the opposite end of the base when the upper end of the lever is swung outwardly away from the underlying end of the housing.

Abstract: A switch housing having a separate base attached to one end includes an electric end contact secured to each end of the base inside the housing, and central electric terminal means secured to the central part of the base between the end contacts. An elongated bridging contact engages the central terminal means and has end portions beside rigid dielectric members projecting from the base adjacent the end contacts for restricted lateral movement of the bridging contact. The end contacts have projections overlying the end portions of the bridging contact, and the base and all of the contacts and terminals together form a base unit in which the bridging contact is confined between the base and the overlying portions of the end contacts before the base is secured to the rest of the switch housing. Manually operable actuating means engage the bridging contact for rocking it on the central terminal means to electrically connect the latter with the overlying portions of either of the overlying contacts.