END ASSEMBLY WITH HOOK FOR TAPE RULE, OR LENGTH MEASUREMENT APPARATUS OF THE SAME TYPE, PROVIDING A 'TRUE ZERO', AND TAPE RULE PROVIDED WITH SUCH A ASSEMBLY

摘要

P THE END ASSEMBLY FOR A RIBBON RULE USES A HOOK PROVIDING A "TRUE ZERO" WHOSE HOOK HAS A JOINT PART 26 WHICH IS OFFSET FROM THE BODY PART 24 OF A DISTANCE EQUAL TO THE THICKNESS OF THE MATERIAL IN WHICH THE HOOK IS MANUFACTURED. THE JOINT PART 26 AND THE PART FORMING BODY 24 HAVE RESPECTIVELY AN EXTERNAL SURFACE 36 AND AN INTERIOR SURFACE 28 PLANE WHICH ARE PERPENDICULAR TO ONE ANOTHER AND WHICH ARE EQUIVALENT FROM THE PIVOTING AXIS OF PART D 'ARTICULATION AROUND A RING BY WHICH THE HOOK IS ATTACHED TO THE RIBBON RULE. THIS ALLOWS THE DEVICE TO BE USED FOR MEASURING EXTERNAL AND INTERIOR DIMENSIONS, WITH THE HOOK PLACED IN ITS OPEN OR CLOSED POSITION RESPECTIVELY. /P