Patent ID: 6829839
Filing Date: 2004-12-14
Classification: G01B

Abstract:
An electronic caliper for measuring the thickness of an object comprising:a housing; a fixed caliper arm fixed to said housing and extending from said housing to a fixed free end external to said housing, said fixed free end providing a first jaw; a movable caliper arm pivotally mounted on a pin supported by said housing, said movable caliper arm being exactly balanced about said pin and extending from said pin to a movable free end external to said housing and providing a second jaw facing said first jaw; a spring biasing said first and second jaws together with the object held therebetween, said spring being the sole force pressing the caliper jaws against the object; a non-contact electronic sensor facing said movable caliper arm for measuring distance to a point on said movable caliper arm, with said jaws closed on the object, as a function of the thickness of the object; and opening means for opening said jaws against the force of said spring.