Abstract: The housing for an electric snap action switch has a front section with a frame having a surface serving to abut the front side of a mounting plate, and a coaxial rear section with a surface facing away from the surface of the frame and serving to abut or to be placed adjacent one side of a circuit board. A nut mates with an externally threaded tubular portion of the front section to maintain the surface of the frame in abutment with the mounting plate. The two sections are separably coupled to each other by resilient male detent elements which are provided on the front section and extend into complementary female detent elements of the rear section. The housing acts as a distancing element between the mounting plate and the circuit board, and its rear section has a recess for a switching unit which is secured to the circuit board and can be actuated by movable parts which are installed in the front section. The rear section is secured to the circuit board by screws.

Abstract: The housing for an electric snap action switch has a front section with a frame having a surface serving to abut the front side of a mounting plate, and a coaxial rear section with a surface facing away from the surface of the frame and serving to abut or to be placed adjacent one side of a circuit board. A nut mates with an externally threaded tubular portion of the front section to maintain the surface of the frame in abutment with the mounting plate. The two sections are separably coupled to each other by resilient male detent elements which are provided on the front section and extend into complementary female detent elements of the rear section. The housing acts as a distancing element between the mounting plate and the circuit board, and its rear section has a recess for a switching unit which is secured to the circuit board and can be actuated by movable parts which are installed in the front section. The rear section is secured to the circuit board by screws.

Abstract: The switching unit of a snap action electric switch employs a contact of the type called mainplate and having a circumferentially complete frame with a substantially diametrically extending blade. The frame has two lugs which flank the median portion of the blade and can be affixed to or simply abut the bottom wall of a cupped mounting member which further receives a pusher capable of moving the median portion of the mainplate from a first end position, at a distance from the bottom wall of the mounting member, toward and through a dead-center position whereupon the median portion snaps to a second end position in which it engages a contact at the bottom wall of the mounting member. The end portions of the blade merge tangentially into the adjacent concavoconvex sections of the frame. The useful life of the mainplate is longer than that of a conventional mainplate wherein four corner portions of the frame are affixed to the bottom wall of the mounting member.