Relamping arrangement for illuminated pushbutton

Claim 1

An illuminated pushbutton switch comprising: A. a tubular housing having a switching mechanism at a longitudinal extremity thereof and further having an outwardly biased, longitudinally movable input mechanism at the opposite longitudinal extremity thereof for actuating said switch mechanism; B. said input mechanism including switch actuating means and pushbutton means which is arranged to be detentably secured within said housing for selective removal so as to allow illumination servicing; C. and defeatable movement limiting means including an interference portion on said housing and an interference portion on said switch actuating means; D. said interference portions being engageable upon initial introduction and inward movement of said pushbutton means into said housing against said bias to limit inward movement of said switch actuating means and thereby preclude actuation of said switch mechanism while allowing said pushbutton means to be detentably secured within said housing; E. one of said interference portions being in continuous engagement with said pushbutton means and being relocated relative to the other of said interference portions by said pushbutton means upon subsequent bias provided by said pushbutton means upon outward movement of said input mechanism so that upon further inward movement of said input mechanism said engagement between said interference portions is not established thereby allowing full inward movement of said input mechanism and actuation of said switch mechanism.