Writing implement

Claim 1

A RETRACTABLE POINT WRITING IMPLEMENT HAVING A WRITING ELEMENT SLIDABLY MOUNTED THEREIN, SAID IMPLEMENT COMPRISING IN COMBINATION: AN ELONGATE HOLLOW BARREL FORMING THE HANDLE OF THE IMPLEMENT AND ACCOMMODATING THE WRITING ELEMENT, ENGAGING MEANS IN SAID BARREL FOR GRIPPING THE WRITING ELEMENT, A CLUTCH SECURED TO SAID ENGAGING MEANS TO MOVE THEREWITH, A REVERSE BUTTRESS THREAD ON SAID CLUTCH, COMPLEMENTARY MEANS ON SAID BARREL AND ON SAID CLUTCH TO RESTRAIN ROTARY MOVEMENT OF SAID CLUTCH MEMBER VET PERMIT AXIAL MOVEMENT THEREOF, A RETRACTING NUT ROTATABLY MOUNTED TO ENGAGE THE THREADS ON SAID CLUTCH AND ADAPTED UPON ROTATION OF SAID NUT TO EFFECT EXTENSION OR RETRACTION OF THE ENGAGING MEANS AND THE WRITING IMPLEMENT, SAID RETRACTING NUT BEING OF OUTER DIAMETER LESS THAN THE INNER DIAMETER OF SAID HOLLOW BARREL, THE END OF THE HANDLE DEFINED BY THE HOLLOW BARREL HAVING AN OPENING TO RECEIVE SAID RETRACTING BUT, SAID RETRACTING NUT HAVING A HANDLE PORTION AT THE OUTER END THEREOF, SAID RETRACTING NUT HAVING A SHOULDER ON ITS OUTER SURFACE ADJACENT THE INNER END THEREOF, SAID BARREL HAVING A SHOULDER ON ITS INNER SURFACE ADJACENT THE OPENING THEREIN ADAPTED TO BE LONGITUDINALLY SPACED FROM THE SHOULDER ON SAID RETRACTING NUT WHEN THE LATTER IS POSITIONED IN THE BARREL AND A CYLINDRICAL ASSEMBLY SLEEVE ENCOMPASSING THE INNER PORTION OF SAID RETRACTING NUT, SAID SLEEVE HAVING ITS INNER END ADAPTED TO ABUT AGAINST THE SHOULDER ON SAID NUT, THE OUTER END OF SAID SLEEVE HAVING RESILIENT TANGS ADAPTED TO ENGAGE THE SHOULDER IN SAID BARREL WHEREBY SAID ASSEMBLY SLEEVE WILL RETAIN SAID RETRACTING NUT IN POSITION IN SAID BARREL RESTRAINED FROM AXIAL MOVEMENT YET PERMITTING ROTARY MOVEMENT THEREOF.