Combination brooch holder and necklace shortener

Claim 1

A JEWELRY CLASP, COMPRISING A CHANNEL-SHAPED BASE MEMBER HAVING PARALLEL SIDE WALLS INTEGRALLY JOINED WITH A TRANSVERSE TOP WALL, A LEAF SPRING BOWED AT ITS CENTER AND SECURED INSIDE SAID BASE MEMBER, SAID LEAF SPRING HAVING MOVABLE FREE ENDS LOCATED AT OPPOSITE ENDS OF SAID SIDE WALLS AND IN SPACED RELATION TO SAID TOP WALL, A FIRST CATCH MEMBER PIVOTALLY SECURED AT ONE END THEREOF TO ONE END OF THE BASE MEMBER, A SECOND CATCH MEMBER PIVOTALLY SECURED AT ONE END THEREOF TO THE OTHER END OF THE BASE MEMBER, EACH OF SAID CATCH MEMBERS HAVING A GENERALLY FLAT ARCUATE STRUCTURE WITH A FREE END EXTENDING INTO SAID BASE MEMBER WHEN THE CATCH MEMBERS ARE CLOSED WITH RESPECT TO THE BASE MEMBER, EACH OF SAID CATCH MEMBERS HAVING CAM SURFACE MEANS INCLUDING A FLAT EDGE PORTION AT THE SECURED ONE END THEREOF, THE FREE ENDS OF THE SPRING BEARING ON THE FLAT EDGE PORTIONS WHEN THE CATCH MEMBERS ARE IN CLOSED POSITION FOR HOLDING THEM IN THIS POSITION, THE CATCH MEMBERS IN CLOSED POSITION DEFINING A PAIR OF OPENINGS WITH SAID BASE MEMBER FOR RECEIVING AND HOLDING RESPECTIVE ENDS OF A NECKLACE, A TUBE HAVING A TUBULAR PASSAGE SECURED TO THE TOP WALL OF THE BASE MEMBER FOR RECEIVING A PIN TO HOLD THE CLASP ON A SUPPORT, AND MEANS INCLUDING A JEWELRY SETTING SECURED TO AN OUTER EDGE OF ONE SAID CATCH MEMBER AND CLOSELY OVERLYING THE OTHER SAID CATCH MEMBER WHEN SAID CATCH MEMBERS ARE IN CLOSED POSITION TO HELP KEEP THE OTHER CATCH MEMBER IN CLOSED POSITION, AND FOR SUBSTANTIALLY CONCEALING THE BASE MEMBER AND CATCH MEMBERS WHEN THE CLASP IS ON A SUPPORT.