Three-position switch

Claim 1

A THREE-POSITION SWITCH COMPRISING A HOUSING FORMED BY A RECESSED BASE AND COVER MEMBER, A PAIR OF SPACED FIXED CONTACTS IN REGISTER WITH EACH OTHER IN SAID HOUSING, A DRY RECTIFIER CONNECTED ACROSS SAID CONTACTS, A FIRST TERMINAL TO WHICH ONE OF SAID FIXED CONTACTS IS CONNECTED, A MOVABLE SPRING CONTACT BLADE HAVING MOTION BETWEEN SAID FIXED CONTACTS, SAID MOVABLE CONTACT BLADE HAVING A DETENT-ENGAGING LATERAL RIDGE ACROSS THE CENTER PORTION THEREOF, A SECOND TERMINAL TO WHICH SAID MOVABLE CONTACT BLADE IS CONNECTED, A MANUALLY OPERABLE TRIGGER MOVABLE ABOUT A PIVOTAL AXIS BETWEEN TWO EXTREME AT-REST POSITIONS AND A MID-WAY AT-REST POSITION, A DETENT ON THE BASE OF SAID TRIGGER IN ENGAGEMENT WITH SAID MOVABLE CONTACT BLADE AND THE LATERAL RIDGE THEREOF FOR CAUSING SAID MOVABLE CONTACT BLADE TO ENGAGE ONE OF SAID FIXED CONTACTS IN ONE EXTREME POSITION AND THE OTHER OF SAID FIXED CONTACTS IN THE OPPOSITE EXTREME POSITION WHILE HOLDING SAID MOVABLE CONTACT OUT-OF-CONTACT WITH SAID FIXED CONTACTS IN THE MID-WAY POSITION, THE BASE PORTION OF SAID TRIGGER HAVING A BOTTOM EDGE ON THE INTERIOR OF SAID HOUSING FORMING AN INDEXING CAM SURFACE WITH THREE SPACED SPRING POCKETS, AND A SPRING MEMBER IN SAID HOUSING ENGAGED BY SAID CAM SURFACE AND BEING DISPLACEABLE BY MOVEMENT BY SAID CAM SURFACE WHEREBY SAID SPRING MEMBER WHEN IN ENGAGEMENT WITH SAID SPRING POCKETS MAINTAINS SAID TRIGGER IN ONE OF ITS THREE AT-REST POSITIONS.