A pushbutton switch assembly having a hand-insertable snap-in subassembly comprising the switch chassis and the switch actuator is disclosed. Dome switch electric contacts are contained within a chassis having a plastic wall with a through opening therein. The chassis has a pair of integral flexible...http://www.google.de/patents/US4286131?utm_source=gb-gplus-sharePatent US4286131 - Pushbutton switch assembly
