Bowling ball grip measuring device

Claim 1

A BOWLING BALL GRIP MEASURING DEVICE WHICH COMPRISES A SHELL MEMBER, SAID SHELL MEMBER BEING FORMED FROM A SEGMENT OF RELATIVELY THIN FLEXIBLE SHEET MATERIAL THAT IS COLLAPSIBLE INTO A ROLLED CONFIGURATION AND THAT FORMS A HEMISPHERICAL MEASURING SURFACE WITH A RADIUS EQUAL TO THAT OF A CONVENTIONAL BOWLING BALL WHEN THE EDGE THEREOF IS SUPPORTED ON A PLANE UNDER SLIGHT PRESSURE, AT LEAST ONE THUMB HOLE FORMED IN SAID SHELL MEMBER SO AS TO RECEIVE THE EXTENDED THUMB OF A USER WHOSE GRIP IS TO BE MEASURED WHEN THE HAND OF THE USER IS PLACED IN MEASURING ORIENTATION ON SAID HEMISPHERICAL MEASURING SURFACE FORMED BY THE SHELL MEMBER, AND MEANS DEFINING A PAIR OF SPACED SCALES ON SAID SHELL MEMBER INCLUDING A PLURALITY OF SCALE MARKS THAT MARK THE LOCATION OF POINTS ON EQUALLY SPACED CIRCLES CONCENTRIC WITH THE SAID THUMB HOLE, SAID DEFINED SCALE MARKS BEING DISPOSED RELATIVE TO SAID THUMB HOLE SO AS TO UNDERLIE THE MIDDLE AND RING FINGER OF THE HAND OF A USER WHEN DISPOSED IN MEASURING ORIENTATION ON SAID HEMISPHERICAL MEASURING SURFACE.