OPTOELEKTRONISCHE REFLEXIONSVORRICHTUNG ZUM ABTASTEN VON SCHUSS- ODER KETTGARN

An optoelectronic reflecting device for scanning weft or warp yarn in which fibre (13) passing through a zone (5) adjacent a transparent scanning plate (4) is scanned by reflection of an infrared light ray from a source (6), which is detected by a receiver (7), advantageously a photo transistor, which converts the optical signal into an electrical signal, which is transmitted, after amplification to a light source emitting an optical signal. The scanning plate (4) is preferably wiped by the scanned fibre (13). The electrical signal may be passed to other circuits for assessing the fibre passage through the scanning zone (5). The device is useful for scanning weft or warp yarn, particularly for multished textile machines, scanning yarn in flat knitting machines, scanning holes, streaks and needle latches in knitting machines.