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A security clutch for a jewelry post with a circumferential groove includes a housing with a post receiving aperture extending therethrough and two access ports through a side wall. A pair of interlocking C-shaped lock members each include an inner free end that carries a lug anchor and an outer fre

A security clutch for a jewelry post with a circumferential groove includes a housing with a post receiving aperture extending therethrough and two access ports through a side wall. A pair of interlocking C-shaped lock members each include an inner free end that carries a lug anchor and an outer free end that serves as a trigger. The lug anchors are spring-biased by a spring toward one another to thereby urge the triggers outward through their respective access ports. The inner free ends are also urged toward one another by the forces of the spring to slidably reside in the post receiving aperture of the housing into locking engagement with the circumferential groove of the jewelry post residing in the post receiving aperture. The spring is serpentine in configuration and is routed from the lug anchor of one lock member to a first side of the inner wall of the housing to an opposite side of the inner wall of the housing back to the first side of the housing and then into communication with the lug of the other lock member. The serpentine configuration of the spring in communication with the inner wall of the housing enables the spring to be precisely centered in the housing thereby providing a precision and smooth operating security clutch for a jewelry post.

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A security clutch for a jewelry post with a circumferential groove includes a housing with a post receiving aperture extending therethrough and two access ports through a side wall. A pair of interlocking C-shaped lock members each include an inner free end that carries a lug anchor and an outer fre

A security clutch for a jewelry post with a circumferential groove includes a housing with a post receiving aperture extending therethrough and two access ports through a side wall. A pair of interlocking C-shaped lock members each include an inner free end that carries a lug anchor and an outer free end that serves as a trigger. The lug anchors are spring-biased by a spring toward one another to thereby urge the triggers outward through their respective access ports. The inner free ends are also urged toward one another by the forces of the spring to slidably reside in the post receiving aperture of the housing into locking engagement with the circumferential groove of the jewelry post residing in the post receiving aperture. The spring is serpentine in configuration and is routed from the lug anchor of one lock member to a first side of the inner wall of the housing to an opposite side of the inner wall of the housing back to the first side of the housing and then into communication with the lug of the other lock member. The serpentine configuration of the spring in communication with the inner wall of the housing enables the spring to be precisely centered in the housing thereby providing a precision and smooth operating security clutch for a jewelry post. ge, and wherein the pressure exerted on the connection element causes material of the metal strip to be upset so as to form a fixing stud in said hole. 5. A method according to claim 1, wherein pressure is exerted on the connection element in such a manner as to cut the material upset by said connection element away from the strip until the connection element takes the place of the upset and cutaway material, and the upset and cut-away material is removed. 6. A method according to claim 1, wherein the connection element is formed in a first end of the strip during a shaping step, and wherein in order to connect together the two ends of the strip, the shaped first end is superposed on the second end of the strip and said pressure is exerted. 7. A method according to claim 6, wherein the strip is subjected to treatment imparting mechanical strength to the first end of said strip that is greater than a mechanical strength of the second end of the strip. 8. A swaging ring comprising a metal strip that is rolled into a hoop, said strip having ends which are connected together by a connection element having at least one anchor edge, said connection element being connected to one end of the strip by at least one fixing member formed against the anchor edge by putting said connection element into place, the connection between the strip and the connection element having no clearance, and a thickness of the ring in the vicinity of the connection element being substantially equal to an ordinary thickness of the strip. 9. A swaging ring according to claim 8, wherein the connection element is constituted by a connection piece that is distinct from the strip and that includes at least one hole placed astride the two ends of the strip. 10. A swaging ring according to claim 8, wherein the connection element is constituted by a connection piece that is distinct from the strip and that includes at least two holes in which two fixing studs belonging to each of the two ends of the strip respectively are formed by upsetting. 11. A swaging ring according to claim 8, wherein the connection element is constituted by a connection piece having anchor edges formed in a surface thereof. 12. A swaging ring according to claim 8, wherein the connection piece is of a thickness substantially equal to the ordinary thickness of the strip. 13. A swaging ring according to claim 8, wherein the connection element is constituted by a connection piece that is distinct from the strip and wherein the connection piece has an average thickness substantially equal to half the ordinary thickness of the strip. 14. A swaging ring according to claim 8, wherein the connection element is constituted by a connection piece that is distinct from the strip, wherein the connection piece is of a width smaller than a width of the strip, and wherein longitudinal margins of the strip are provided along longitudinal edges of the connection piece. 15. A swaging ring according to claim 8, wherein the connection element is constituted by a first end of the strip having at least one anchor edge, the first and second ends of the strip being flattened against each other, and a fixing member belonging to the second end being formed against said anchor edge. 16. A swaging ring according to claim 8, wherein the connection element has a mechanical strength greater than a mechanical strength of the end(s) of the strip with which it co-operates. 17. An installation for manufacturing a swaging ring comprising: means for rolling up a metal strip into a hoop; and means for connecting together ends of said strip by a connection element having at least one anchor edge, the installation comprising means for placing the connection element against one end of the strip so that at least one anchor edge of said connection element is in register with said end, and a press tool for exerting pressure on the connection element in such a manner as to upset the material of said end of the strip that lies beneath the