Abstract: An improved switch assembly includes a housing and a push button which is movable relative to the housing between extended and retracted positions. Upon manual actuation of the push button, the push button is moved into the housing from the extended position to the retracted position. Upon releasing of the push button, the push button moves back out of the housing from the retracted position to the extended position. An improved seal is provided to seal a Joint between the push button and the housing. During movement of the push button from the extended position to the retracted position, the seal provides relatively little resistance to movement of the push button. However, upon movement of the push button from the retracted position back to the extended position, the seal provides substantially greater resistance to movement of the push button to prevent overtravel of the push button past the desired extended position.

Abstract: Upper and lower connector sections of a connector block assembly have contact cavities which receive electrical contacts. A pair of resiliently deflectable retainer fingers engage latch flanges disposed in retainer cavities. The retainer fingers have a nonuniform cross sectional configuration. The nonuniform cross sectional configuration of the retainer fingers enables the retainer fingers and the retainer cavities to fit into a dense array of contact cavities formed in the upper and lower connector sections. In addition, the nonuniform cross sectional configuration of the retainer fingers enable them to be resiliently deflected by the latch flanges without breaking. As the connector sections are interconnected, alignment collars extending from a side of one of the connector sections move into recesses formed in the other connector section to accurately align the contact cavities.