Insert for a switch button

Claim 1

IN COMBINATION, A PUSH BUTTON SWITCH OPERATOR HAVING A RIGID BODY WITH A FORWARD FACE AND A CONCAVITY THEREIN, SAID CONCAVITY HAVING A SUBSTANTIALLY FLAT BOTTOM WALL AND AN INTEGRAL ANNULAR PERIPHERAL WALL WITH PORTIONS THEREOF OVERHANGING THE BOTTOM WALL OF THE CONCAVITY IN FORWARDLY SPACED RELATION THERETO, AND A RELATIVELY STIFF RESILIENT PLATE-LIKE INSERT MEMBER DISPOSED FLATWISE IN THE CONCAVITY WITH A CENTRALLY LOCATED PORTION THEREOF IN ENGAGEMENT WITH THE BOTTOM WALL AND HAVING PERIPHERAL FASTENING PORTIONS ARRANGED TO LIE IN SPACED RELATION TO THE BOTTOM WALL AND OUTWARDLY FROM THE INNER PERIPHERAL LIMITS OF SAID OVERHANGING WALL PORTIONS OF SAID CONCAVITY WHEN SAID MEMBER IS IN SAID CONCAVITY, INTERENGAGEABLE MEANS ON SAID PERIPHERAL FASTENING PORTIONS OF SAID MEMBER AND THE INNER PERIPHERIES OF SAID OVERHANGING WALL PORTIONS OPERABLE AS THE MEMBER IS PRESSED FLATWISE INTO THE CONCAVITY TO DISPLACE SAID PERIPHERAL FASTENING PORTIONS OF SAID MEMBER INWARDLY OF SAID OVERHANGING WALL PORTIONS TOWARD THE CENTRALLY LOCATED PORTION OF SAID MEMBER, SAID OVERHANGING WALL PORTIONS OF SAID PERIPHERAL WALL OF SAID CONCAVITY BEING PORTIONS OF A PERIPHERALLY CONTINUOUS INWARDLY DIRECTED FLANGE MEMBER AND SAID INTERENGAGEABLE MEANS ON SAID PERIPHERAL FASTENING PORTIONS OF SAID MEMBER BEING A SURFACE WHICH IS BEVELLED ENDWISE OF SAID MEMBER FOR CAMMING SAID PERIPHERAL FASTENING PORTIONS OF SAID PLATE MEMBER INWARDLY TOWARD THE CENTRALLY LOCATED PORTION OF THE MEMBER TO PERMIT PASSAGE OF SAID MEMBER FLATWISE PAST SAID FLANGE MEMBER INTO THE CONCAVITY TO THE POSITION WHEREIN THE CENTRALLY LOCATED PORTION ENGAGES THE BOTTOM WALL OF THE CONCAVITY.