Patent ID: 6164639
Filing Date: 2000-12-26
Classification: B65H,G03G

Abstract:
Apparatus for measuring a dimension of an object comprising:a first element which is adjustable to different positions to contact a portion of the object,a second element which is stationary relative to the object, wherein one of the first and second elements includes an electro-optical sensor for transmitting and receiving an optical signal and the other of the first and second elements includes a tappered arm having a length, wherein a surface of the arm which is sloped relative to the electro-optical sensor provides a reflective surface, the reflective surface facing and being spaced from said electro-optical sensor,wherein the spacing between said reflective surface and said electro-optical sensor is variable according to different adjustment positions of the first element such that the strength of an optical signal reflected from the reflective surface and received by the sensor relative to a transmitted optical signal is correspondingly variable,whereby the electro-optical sensor provides an electrical signal which is a measure of a dimension of the object when the first element is adjusted to a position in contact with said portion thereof.