Writing instrument

Claim 1

A WRITING INSTRUMENT HAVING A CASING WITH AN OPENING IN THE FORWARD END THEREOF, A WRITING ASSEMBLY PROJECTING THROUGH SAID OPENING, SAID INSTRUMENT HAVING A BARREL AND A CAP, LONGITUDINALLY EXTENDING PUSH MEANS NORMALLY POSITIONED WITHIN SAID WRITING ASSEMBLY, SAID WRITING ASSEMBLY HAVING CLUTCH JAWS THEREIN, A RELATIVELY LIGHT LEAD STOP SPRING AND A RELATIVELY HEAVY CLUTCH SPRING IN SAID BARREL WHICH MUST BOTH BE COMPRESSED TO OPEN SAID CLUTCH JAWS, SAID SPRINGS POSITIONED IN CONTRACTING RELATION ON OPPOSITE SIDES OF A MEMBER IN SAID WRITING ASSEMBLY, SAID LEAD STOP SPRING BEING RELATIVELY EASY TO COMPRESS BUT REQUIRING A MAJOR AMOUNT OF MOVEMENT OF THE PUSH MEANS, SAID CLUTCH SPRING RESISTING COMPRESSION UNTIL SUFFICIENT ADDITIONAL FORCE IS APPLIED, STOP MEANS POSITIONED IN THE UPPER PORTION OF THE BARREL TO STOP SAID PUSH MEANS WITHIN A SHORT DISTANCE AFTER SUFFICIENT FORCE HAS BEEN APPLIED TO COMPRESS SAID CLUTCH SPRING, THEREBY CAUSING AN AUDIBLE SOUND AND PROPELLING THE LEAD FROM THE INSTRUMENT AGAINST SAID EXTERNAL STOP BY REASON OF THE INERTIA OF THE LEAD CREATED THEREIN BY SAID MOVABLE MEANS, SAID PUSH MEANS INCLUDING TWO TUBULAR PIECES WHICH CAN BE ROTATED WITH RESPECT TO EACH OTHER TO ADJUST THE DISTANCE WHICH THE LEAD STOP PROJECTS BEYOND THE TIP OF THE INSTRUMENT WHEN THE PUSH MEANS HAS BEEN ACTUATED, SAID CLUTCH JAWS HAVING A STRAIGHT PORTION ON THEIR OUTER CAM SURFACES TO LIMIT THE AMOUNT OF OPENING THEREBETWEEN REGARDLESS OF THE AMOUNT OF MOVEMENT OF SAID PUSH MEANS.