Electric switches

Claim 1

A SLIDING CONTACT ROTARY ELECTRIC SWITCH HAVING AT LEAST ONE SWITCH SECTION CONSISTING OF AN INSULATING SUPPORT CARRYING A SERIES OF SPACED FIXED CONTACTS HAVING FLAT ELONGATED RECTANGULAR CONTACT SURFACXES ARRANGED ON A CIRCULAR PATH AND A COMMON FIXED CONTACT HAVING A FLAT CONTACT SURFACE WITH ALL OF THE CONTACT SURFACES BEING ARRANGED IN THE SAME PLANE, AND A RIGID CONDUCTING BRIDGE MEMBER HAVING A CONTINUOUS FLAT CONTACT SURFACE DISPOSED IN SAID PLANE AND MOUNTED FOR SLIDING MOVEMENT OVER THE FLAT CONTACT SURFACES OF SAID FIXED CONTACTS AND ROTATABLE ABOUT THE CENTRE OF THE CIRCULAR PATH ON WHICH ARE LOCATED THE SPACED FIXED CONTACTS, WHEREBY ANY OF THE SERIES OF SPACED FIXED CONTACTS CAN BE SELECTIVELY AND INDIVIDUALLY CONNECTED TO THE COMMON FIXED CONTACT BY THE CONTINUOUS FLAT CONTACT SURFACE OF SAID CONDUCTING BRIDGE MEMBER AND SPRING MEANS URGING THE FLAT CONTACT SURFACE OF MEMBER INTO ENGAGEMENT WITH THE FLAT CONTACT SURFACE OF SAID FIXED CONTACTS, SAID SPACED FIXED CONTACTS BEING DISPOSED TO MINIMIZE CAPACITANCE THEREBETWEEN WITH THE LONGEST DIMENSIONS OF THEIR RECTANGULAT CONTACT SURFACES OBLIQUE RELATIVE TO THE RADIUS WHICH EXTENDS FROM THE CENTRE OF ROTATION OF THE BRIDGE MEMBER AND WHICH IS LOCATED EQUIDISTANTLY FROM THE GEOMETRIC CENTRES OF TWO ADJACENT CONTACTS AND WITH THE NEIGHBOURING ENDS OF ADJACENT ONES OF SAID SPACED FIXED CONTACTS BEING SPACED APART BY A DISTANCE WHICH IS LARGE IN RELATION TO THE CONTACT CROSS-SECTION, BUT MEETING SAID RADIUS SO THAT SAID BRIDGE MEMBER IS ALWAYS IN ELECTRICAL CONTACT WITH AT LEAST ONE OF SAID SPACED FIXED CONTACTS WHEN PASSING FROM ONE OF SAID SPACED FIXED CONTACTS TO THE NEXT ADJACENT SPACED FIXED CONTACT.