Patent ID: 8261459
Filing Date: 2012-09-11
Classification: G01B

Abstract:
1. A modular edge reference tool comprising: a first segment defining a longitudinal axis and a reference edge and having an extending end; a second segment defining a longitudinal axis and a reference edge and having a receptacle end; a coupling mechanism that couples the extending end and the first segment to the receptacle end of the second segment in a first and second stage that includes: wherein the first end of the spring moves with the shaft closer to the second end of the spring as the shaft moves deeper into the hole upon the rotation of the second segment to provide a force of a first degree in the first stage to couple the first segment to the second segment; and wherein the transition of the handle from the first position to the second position moves the second end of the spring farther towards the first end of the spring to provide a force of a second degree higher than the first degree in the second stage to couple the first segment to the second segment.