Patent Number: 
Section: claims

1. A device for retaining a workpiece, including;a first retaining element;a second retaining element which pivots with respect to the first retaining element from a first position to a second position;the first retaining element including a transverse shelf element for abutting a first end of the workpiece and a wall element for abutting walls of the workpiece;the second retaining element including an inwardly extending element for engaging a second end of the workpiece;wherein in the first position, the first retaining element and the second retaining element are longitudinally aligned with each other;wherein in the second position, the first and second retaining elements are perpendicular to each other;wherein the wall element is a partially cylindrical wall for abutting cylindrical sidewalls of a cylindrical workpiece; andwherein the inwardly extending element includes a threaded screw received within a threaded aperture in the second retaining element. 2. The device of claim 1 wherein the threaded aperture is formed on an end of the second retaining element. 3. The device of claim 1 wherein the second retaining element includes a frusto-conical end cap on an end thereof, the threaded aperture passing through the end cap, and further including first and second legs extending from the end cap to a pivot axis on the first retaining element. 4. The device of claim 3 wherein the pivot axis includes a transverse passageway proximate to the transverse shelf element. 5. The device of claim 4 wherein the first retaining element includes a blind aperture for receiving a shaft. 6. The device of claim 1 wherein in the first position, the device is closed and retains the workpiece and in the second position, the device is open for receiving the workpiece. 7. A device for retaining a radioactive source capsule, including;a first retaining element;a second retaining element which pivots with respect to the first retaining element from a first position to a second position;the first retaining element including a transverse shelf element for abutting a first end of the radioactive source capsule and a wall element for abutting walls of the radioactive source capsule; andthe second retaining element including an inwardly extending element for engaging a second end of the radioactive source capsule. 8. The device of claim 7 wherein in the first position, the first retaining element and the second retaining element are longitudinally aligned with each other. 9. The device of claim 8 wherein in the second position, the first and second retaining elements are perpendicular to each other. 10. The device of claim 9 wherein the wall element is a partially cylindrical wall for abutting cylindrical sidewalls of a radioactive source capsule. 11. The device of claim 10 wherein the inwardly extending element includes a threaded screw received within a threaded aperture in the second retaining element. 12. The device of claim 11 wherein the threaded aperture is formed on an end of the second retaining element. 13. The device of claim 11 wherein the second retaining element includes a frusto-conical end cap on an end thereof, the threaded aperture passing through the end cap, and further including first and second legs extending from the end cap to a pivot axis on the first retaining element. 14. The device of claim 13 wherein the pivot axis includes a transverse passageway proximate to the transverse shelf element. 15. The device of claim 14 wherein the first retaining element includes a blind aperture for receiving a shaft. 16. The device of claim 9 wherein in the first position, the device is closed and retains the radioactive source capsule and in the second position, the device is open for receiving the radioactive source capsule.