Locking means for movable support plate

Claim 1

A HEEL SUPPORT FOR WATER SKI COMPRISING: A PLATE MEMBER, SAID PLATE MEMBER HAVING TRAKWAYS AND AN ELONGATED SLOT FORMED WITH A PLURALITY OF CLOSELY SPACED NOTCHES; PIN MEANS CONNECTING SAID WATER SKI AND ENGAGING SAID TRACKWAYS OF SAID PLATE MEMBER TO CONSTRAIN SAID PLATE MEMBER TO SLIDABLE FORWARD AND REARWARD MOVEMENT; A PIVOT POST CONNECTING SAID WATER SKI AND EXTENDING UPRIGHT THROUGH SAID ELONGATED SLOT IN AID PLATE MEMBR; A WIRE SPRING INTERPOSED BETWEEN SAID WATER SKI AND SAID PLAE MEMBR, ONE END OF SAID WIRE SPRING BEING ANCHORED TO SAID WATER SKI AND THE OTHER END OF SAID WIRE SPRING BEING UPTURNED FOR EXTENDING UPRIGHT THROUGH SIAD SLOT ABOVE SAID PLATE MEMBER FORWARD OF SAID PIVOT POST; AND KNOB MEANS MOUNTED ON SAID PIVOT POST FOR ROTATABLE MOVEMENT THEREON, SAID KNOB MEANS HAVING PASSAGEWAY THEREIN FOR RECEIVING SIA DUPTURNED END OF SIAD WIRE SPRING, AND SAID UPTURNED END BEING GUIDED BY SAID KNOB MEANS OUT OF AND INTO A SLECTED NOTCH FORWARD OF SAID PIVOT POST, AGAINST AND WITH, RESPECTIVELY, THE URGING OF SAID SPRING.