Multi-point rotary switch with improved detent arrangement

Claim 1

A MULTI-POSITION ROTARY SWITCH COMPRISING A HOUSING FOR AT LEAST ONE GROUP OF ANGULARLY SPACED FIXED CONTACTS, A ROTATABLE SHAFT CARRYING AT LEAST ONE MOVABLE CONTACT ASSEMBLY, EACH OF SAID CONTACT ASSEMBLIES COMPRISING RESILIENT BRUSH STRUCTURE EXTENDING RADIALLY FROM SAID SHAFT FOR SELECTIVELY ENGAGING A CORRESPONDING GROUP OF SAID FIXED CONTACTS AND APPLYING CONTACT PRESSURE IN DIRECTION AXIALLY OF SAID SHAFT, A PAIR OF CARRIAGE MEMBERS MOUNTED ON SAID SHAFT FOR ROTATION THEREWITH, EACH OF SAID MEMBERS HAVING RADIAL SLOTS ON OPPOSITE SIDES OF THE SHAFT AND PAIRED WITH PARALLEL RADIAL SLOTS OF THE OTHER CARRIAGE MEMBER, A STATIONARY INTERNALLY-NOTCHED ANNULUS MOUNTED ON SAID HOUSING CONCENTRIC TO SAID SHAFT AND IN A PLANE WHICH EXTENDS BETWEEN SAID CARRIAGE MEMBERS, A PAIR OF ROLLERS HAVING AXLES RESPECTIVELY RECEIVED BY A CORRESPONDING ONE OF THE PAIRS OF SAID RADIAL SLOTS, AND A LEAF SPRING STRUCTURE FREELY SPANNING SAID SHAFT AND HAVING ITS OPPOSITE ENDS RESPECTIVELY ENGAGING SAID AXLES TO BIAS SAID ROLLERS IN OPPOSITE DIRECTIONS AWAY FROM SAID SHAFT, EACH OF SAID SPRING ENDS BEING SHAPED TO PROVIDE A BEARING FOR THE AXLE OF THE ASSOCIATED ROLLER AND AT LEAST ONE OF SAID ROLLERS COOPERATING WITH SAID INTERNALLY NOTCHED ANNULUS AND SAID LEAF SPRING STRUCTURE TO APPLY DETENT PRESSURE IN DIRECTION RADIALLY OF SAID SHAFT.