A key switch assembly for direct mounting on a PCB or similar substrate. The key switch has a body with depending mounting pin having retainers thereon to secure the key switch at apertures in the substrate. The key switch body has a hinged key and includes a snappable dome moveable from a non-actuated...http://www.google.de/patents/US4845319?utm_source=gb-gplus-sharePatent US4845319 - Key switch assembly
