Pressure wire terminal clamp with self-retained wire clamp

Claim 1

A SCREW AND CAPTIVE CLAMP ASSEMBLY FOR CLAMPING CONDUCTORS TO A TERMINAL AND COMPRISING A SCREW HAVING A HEAD AT ONE END WITH AN UNDERSIDE FACING TOWARD THE OTHER END, A THREADED PORTION EXTENDING FROM THE OTHER END TOWARD THE HEAD AND TERMINATING PART WAY TOWARD THE HEAD FROM SAID OTHER END, AND A SMOOTH SHANK BETWEEN THE UNDERSIDE OF THE HEAD AND THE ADJACENT END OF THE THREAD, A RIGID CLAMP HAVING AN OBLONG OPENING THERETHROUGH, SAID SHANK BEING ACCOMODATED IN THE OPENING, A RAISED ANNULAR BEAD ON THE SCREW IN SPACED RELATION TO THE UNDERSIDE OF THE HEAD FOR RETAINING THE CLAMP ON THE SHANK WITH LIMITED AXIAL MOVEMENT RELATIVE TO THE SHANK, SAID BEAD HAVING A GREATER DIAMETER THAN THE WIDTH OF THE OPENING AND LESS DIAMETER THAN THE LENGTH OF THE OPENING SO THAT THE CIRCUMFERENTIAL PORTION OF THE BEAD FACING THE END OF THE OPENING CAN ENTER THE OPENING UPON TILTING OF THE CLAMP RELATIVE TO THE SCREW, ABOUT AN AXIS EXTENDING TRANSVERSELY OF THE OPENING, SAID CLAMP HAVING CLAMPING PORTIONS AT OPPOSITE SIDES OF SAID AXIS, RESPECTIVELY, SAID PORTIONS HAVING UPPER SURFACES, RESPECTIVELY, WHICH SLOPE UPWARDLY TOWARD THE UNDERSURFACE OF THE HEAD OF THE SCREW INWARDLY, ENDWISE OF THE OPENING, TOWARD THE SCREW AXIS AND THEREBY PROVIDE A RIDGE WHICH IS INTERRUPTED BY THE OPENING AND EXTENDS IN A DIRECTION GENERALLY TRANSVERSELY OF THE OPENING, AND WHICH IS ENGAGEABLE BY THE UNDERSIDE OF THE HEAD, WHEREBY THE CLAMP CAN ROCK ABOUT SAID RIDGE AS A FULCRUM AS THE CLAMP IS MOVED BY THE SCREW HEAD TO CLAMPING POSITION, AND SAID CLAMPING PORTIONS HAVING UNDERSURFACES, RESPECTIVELY, FOR ENGAGING CONDUCTORS TO BE CLAMPED.