Rotary snap switch

Claim 1

A SWITCH COMPRISING A CASING OF AN ELECTRICAL INSULATING MATERIAL, SAID CASING HAVING A CAVITY THEREIN WHICH IS DEFINED BY A PAIR OF SPACED PARALLEL FLAT SURFACES AND A CYLINDRICAL SURFACE EXTENDING BETWEEN SAID FLAT SURFACES, A PAIR OF CONTACTS CARRIED BY SAID CASING, ONE OF SAID CONTACTS HAVING A SURFACE EXTENDING ALONG AND FLUSH WITH ONE OF SAID FLAT SURFACES AND THE OTHER CONTACT HAVING A SURFACE EXTENDING ALONG AND FLUSH WITH THE OTHER FLAT SURFACE DIRECTLY OPPOSITE THE SURFACE OF SAID ONE CONTACT, A ROTOR OF AN ELECTRICAL INSULATING MATERIAL ROTATABLY MOUNTED WITHIN SAID CAVITY, SAID ROTOR ENGAGING THE FLAT AND CYLINDRICAL SURFACES OF THE CAVITY SO AS TO BE SUPPORTED BY THE SURFACES OF THE CAVITY A CONTACT EXTENDING THROUGH AND CARRIED BY SAID ROTOR, SAID ROTOR BEING ROTATABLE BETWEEN A CLOSED POSITION IN WHICH THE ROTOR CONTACT SIMULTANEOUSLY ENGAGES SAID CASING CONTACTS AND AN OPEN POSITION IN WHICH THE ROTOR CONTACT IS ANGULARLY DISPLACED FROM THE CASING CONTACTS, SPRING MEANS ADAPTED TO SNAP SAID ROTOR FROM ITS OPEN POSITION TO ITS CLOSED POSITION AND NORMALLY HOLDING SAID ROTOR IN ITS CLOSED POSITION, MEANS WHEREBY THE ROTOR CAN BE ROTATED TO ITS OPEN POSITION, SAID SPRING MEANS BEING UNDER TENSION WHEN THE ROTOR IS IN ITS OPEN POSITION, AND MEANS FOR RELEASABLY SECURING THE ROTOR IN ITS OPEN POSITION.