Extension means for tripods

Claim 1

AN EXTENSION MEANS FOR A TRIPOD COMPRISING: (A) A BODY CONNECTED TO THE TOP OF A TRIPOD AND HAVING A VERTICAL BORE THEREIN AND A CAVITY SPACED LATERALLY FROM SAID BORE, (B) A TUBE SLIDABLY EXTENDING THROUGH SAID BORE AND PROVIDED WITH LONGITUDINALLY AND UNIFORMLY SPACED HOLES IN THE WALL THEREOF, (C) GEAR MEANS CARRIED BY THE BODY AND HAVING TAPERED TEETH, WHICH AT THEIR BASES SNUGLY FIT INTO THE HOLES IN THE TUBE TO EFFECT MOVEMENT OF THE TUBE AND BODY RELATIVELY, SAID SNUGLY FITTED TEETH HOLDING SAID TUBE AND BODY AGAINST RELATIVE ROTATION, AND (D) ADJUSTABLE WEDGE MEANS LOOSELY MOUNTED IN SAID BODY CAVITY FORMED WITH A TAPERED FACE ENGAGING THE PERIPHERAL SURFACE OF SAID TUBE AT A TANGENT THERETO, SAID MEANS HAVING A THREADED BORE THERETHROUGH, AND A SHAFT HAVING A THREADED EXTREMITY ENGAGING THE THREADS IN SAID BORE, SAID SHAFT PROJECTING OUTWARDLY THROUGH SAID BODY FOR MANUAL ROTATION TO MOVE SAID MEANS AGAINST SAID TUBE TO FRICTIONALLY RESIST THE RELATIVE MOVEMENT OF THE TUBE AND BODY DURING OPERATION OF SAID GEAR MEANS AND TO RETAIN SAID TUBE AND BODY IN ADJUSTED POSITION, AND MEANS ENGAGING SAID SHAFT FOR PREVENTING ITS LONGITUDINAL MOVEMENT DURING ROTATION.