Adjustable resilient writing instrument

Claim 1

IN A WRITING INSTRUMENT OF THE TYPE COMPRISING A HOUSING HAVING AN OPEN END, A WRITING UNIT INCLUDING A WRITING TIP, SAID WRITING UNIT BEING MOUNTED MOVABLY IN SAID HOUSING FOR MOVEMENT BETWEEN A PROJECTED POSITION IN WHICH THE TIP EXTENDS THROUGH AND BEYOND THE OPEN END OF SAID HOUSING AND A RETRACTED POSITION IN WHICH THE TIP IS WITHDRAWN INTO SAID HOUSING, ACTUATING MEANS FOR MOVING SAID UNIT BETWEEN SAID POSITIONS, RETAINING MEANS FOR RETAINING SAID UNIT IN SAID PROJECTED POSITION AND MEANS FOR DISABLING SAID RETAINING MEANS TO ALLOW SAID UNIT TO MOVE TO SAID RETRACTED POSITION, THE IMPROVEMENT COMPRISING; MEANS FOR SUPPORTING SAID RETAINING MEANS MOVABLY WITHIN SAID HOUSING AND RESILIENT MEANS URGING SAID RETAINING MEANS TOWARD THE OPEN END OF SAID HOUSING, SID RETAINING MEANS BEING YIELDABLE AGAINST THE INFLUENCE OF SAID RESILIENT MEANS AWAY FROM THE OPEN END OF SAID HOUSING IN RESPONSE TO THE APPLICATION OF PRESSURE TO SAID WRITING TIP.