Sub-miniature selector device with eccentrically displaced contact wiper apparatus

Claim 1

THE COMBINATION COMPRISING: A THIN WAFER OF INSULATING MATERIAL HAVING AN APERTURE THERETHROUGH; A SHAFT ROTATABLE ON AN AXIS EXTENDING THROUGH SAID APERTURE; PRINTED ELECTRICAL CIRCUITRY ON ONE SURFACE OF SAID WAFER, SAID CIRCUITRY INCLUDING FIRST AND SECOND ANNULAR RACES OF PRINTED CONTACTS, SAID RACES BEING POSITIONED CONCENTRICALLY WITH THE AXIS OF SAID SHAFT AND HAVING FIRST AND SECOND DIAMETERS, RESPECTIVELY; A NONCONDUCTIVE SPACER OVERLYING AND AFFIXED TO SAID SURFACE OF SAID WAFER, SAID SPACER HAVING A CIRCULAR APERTURE WITH A DIAMETER AT LEAST AS GREAT AS THE GREATER OF SAID TWO RACES, WHEREBY SAID RACES ARE EXPOSED IN A CIRCULAR RECESS DEFINED BY THE CIRCULAR APERTURE OF SAID SPACER; AN ELONGATED CONTACT CARRIER POSITIONED WITHIN SAID RECESS, THE ENDS OF SAID ELONGATED CONTACT CARRIER COMPRISING THE ARCS OF A CIRCLE HAVING A DIAMETER SLIGHTLY LESS THAN THE DIAMETER OF SAID RECESS, SAID CONTACT CARRIER BEING ANGULARLY FIXED TO SAID SHAFT BUT AXIALLY MOVABLE THEREON; A SUBSTANTIALLY CIRCULAR SPRING CONTACT BRIDGING AND FIXEDLY SUPPORTED FROM BETWEEN THE ENDS OF SAID CARRIER, SAID SPRING CONTACT BEING CURVED ALONG ONE OF ITS DIAMETERS TOWARD AND INTO CONTACT WITH SAID SURFACE, SAID DIAMETER OF SAID SPRING CONTACT INTERSECTING THE AXIS OF SAID SHAFT AT A POINT SPACED FROM THE CENTER OF THE SPRING CONTACT, THE DIAMETER OF THE SPRING CONTACT BEING DIMENSIONED SO THAT ONE END THEREOF IS AT A DISTANCE FROM SAID AXIS EQUAL TO THE RADIUS OF ONE OF SAID RACES AND THE OTHER END THEREOF IS AT A DISTANCE FROM SAID AXIS EQUAL TO THE OTHER OF SAID RACES; AND MEANS FOR AXIALLY CONFINING AND URGING SAID CIRCULAR SPRING CONTACT AGAINST SAID RACES, SAID LAST-NAMED MEANS COMPRISING AN INWARDLY EXTENDING FLANGE ON SAID SPACER, SAID FLANGE BEING SPACED FROM SAID SURFACE AND OVERLYING SAID CARRIER FOR PROVIDING AN ANNULAR RACEWAY FOR SAID CARRIER.