Test jack terminal

Claim 1

A TEST JACK TERMINAL COMPRISING AN INSULATOR AND AN ELECTRODE, SAID INSULATOR HAVING A CYLINDRICAL BODY PART TERMINATING AT ONE END IN AN ENLARGED HEAD, SAID INSULATOR BEING FORMED FROM A DISTORTABLE DIELECTRIC MATERIAL AND HAVING AN AXIAL BORE COMPOSED OF A PLURALITY OF SECTIONS ONE OF WHICH COMPRISES AN ENLARGED COUNTERBORE EXTENDING INWARDLY FROM THE OUTERMOST END OF THE CYLINDRICAL BODY PART OF THE INSULATOR AND TERMINATING IN A SEAT SURROUNDING AN ADJOINING SECTION OF THE BORE WHICH IS OF A SMALLER DIAMETER THAN SAID COUNTERBORE, SAID ELECTRODE COMPRISING AN ELONGATED METALLIC MEMBER INSERTED IN THE INSULATOR FROM THE OUTERMOST END OF SAID CYLINDRICAL BODY PART, SAID ELECTRODE HAVING A POST AT ONE END WHICH EXTENDS THROUGH SAID BORE IN THE DIRECTION OF THE ENLARGED HEAD OF THE INSULATOR, AN ENLARGED CENTRALLY DISPOSED BODY PORTION, AND A SOCKET ON THE SIDE OF THE ENLARGED BODY PORTION OPPOSITE SAID POST, SAID SOCKET HAVING AN ANNULAR WALL INTERRUPTED BY A PLURALITY OF SLOTS EXTENDING LENGTHWISE OF THE SOCKET AND ACTING TO DIVIDE SAID ANNULAR WALL INTO SEGMENTS CAPABLE OF BEING RADIALLY COMPRESSED, THE OUTSIDE DIAMETERS OF SAID ENLARGED BODY PORTION AND SAID SOCKET BEING GREATER THAN THE DIAMETER OF THE SECTION OF THE BORE LYING BEYOND SAID SEAT, SAID SOCKET HAVING AN ANNULAR PROJECTION OF A SIZE TO FIT WITHIN SAID COUNTERBORE BUT OT AN EFFECTIVE DIAMETER GREATER THAN THE DIAMETER OF THE SAID BORE SECTION LYING BEYOND SAID SEAT, THE DEPTH OF SAID COUNTERBORE BEING SUCH THAT UPON INSERTION OF THE CYLINDRICAL BODY PORTION OF THE INSULATOR IN A TERMINAL RECEIVING OPENING IN A TERMINAL BOARD WITH THE UNDERSURFACE OF THE ENLARGED HEAD SEATED AGAINST ONE FACE OF THE TERMINAL BOARD WITH THE SAID ANNULAR PROJECTION IN CONTACT WITH SAID SEAT, THE ENLARGED BODY PORTION OF THE ELECTRODE AND A PORTION AT LEAST OF THE SOCKET WILL BE FORCED INTO THE SMALLER DIAMETER SECTION OF THE BORE LYING BEYOND SAID SEAT ON THE SIDE OF THE TERMINAL BOARD OPPOSITE SAID ENLARGED HEAD, THE CYLINDRICAL BODY PORTION OF THE INSULATOR BEING THEREBY EXPANDED RADIALLY OUTWARDLY IN THE AREA BETWEEN SAID TERMINAL BOARD AND SAID ANNULAR PROJECTION TO LOCK THE TERMINAL TO THE TERMINAL BOAD, WITH THE SOCKET EFFECTIVELY MAINTAINED IN A RADIALLY COMPRESSED CONDITION.