Bowler's wrist positioner

Claim 1

A wrist positioner for use by a bowler, adapted to be mounted in a predetermined position of use on the back of the hand and the forearm of a bowler, comprising: a hand backup member that, when the positioner is mounted in its position of use, extends from the bowler's wrist across a part of the back of the bowler's hand; a forearm backup member that, when the positioner is mounted in its position of use, extends from the wrist of the bowler along a part of the back of the bowler's forearm; latching hinge means, that, when the positioner is mounted in its position of use, is located at the back of the bowler's wrist, interconnecting the hand and forearm backup members and establishing and maintaining the backup members at any preselected angle relative to each other within a predetermined range of angles; the latching hinge means comprising: pivotal connection means connecting the hand backup member and the forearm backup member at the wrist of the bowler when the positioner is mounted in its position of use; a first slot, in the hand backup member; a second slot, in the forearm backup member; the first and second slots being each extending across the back of the bowler's wrist when the positioner is mounted in its position of use, and the first and second slots being aligned relative to each other so that the two slots intersect; the intersection of the first and second slots varying along the lengths of the slots in accordance with changes in the angular orientation of the backup members relative to each other; a pin extending through the intersection of the first and second slots; and releasable fastener means, mounted on the pin, for firmly holding the backup members at any angle, relative to each other, within the predetermined range; and fastening means for securing the wrist positioner to the hand and forearm of the bowler in its position of use.