Patent ID: 6062501
Filing Date: 2000-05-16
Classification: D03D,H03K

Abstract:
In a yarn feeder comprising a housing including a drive shaft, a winding on element which is rotatable by means of said drive shaft, a storage drum provided at said drive shaft on which yarn is wound in a yarn store by said winding on element, and at least one proximity sensor which includes a sensor element, said sensor element being directed towards a motion area of a flux conducting body of magnetic or electromagnetic flux conducting material, said flux conducting body being movable in said motion area in relation to said sensor element which responds to the motion of said flux conducting body, comprising the improvement wherein said sensor element is directed towards said flux conducting body and said proximity sensor defines either a yarn sensor for detecting the size of said yarn store wherein said yarn sensor varies in dependence on consumption of said yarn which is removed from said yarn store, said flux conducting body being provided in said storage drum so as to be movable by said yarn store relative to said sensor element and said yarn sensor being mounted stationarily outside said storage drum, or a speed- or counting sensor which is provided in said housing wherein said flux conducting body rotates with said drive shaft or said winding on element, said proximity sensor further including at least one trimming body of magnetic or electromagnetic flux conducting material which is disposed a relative distance from said sensor element, said relative distance being adjustable wherein adjustment of said relative distance varies the response sensitivity of said respective sensor element.