Dent counter for loom reed

摘要

A counter for counting the dents of a loom reed including a housing having a relatively smooth bottom surface for allowing the housing to be manually slid over the dent of a reed for counting the dents. A light beam is directed by means of a fiber optic member onto the dent and is reflected back through a fiber optic bundle carried coaxially of the first fiber optic member to trigger a transistor responsive to each reflected signal. Operational amplifiers produce pulses responsive to the triggering of the transistor which are counted by a counter and displayed by a light display member.