Device for indicating a condition of nearly exhausted yarn reserve on a bobbin to stop automatically a hosiery knitting machine

摘要

For a textile machine fed by yarn bobbins, such as a hosiery knitting machine and like apparatus, a device is provided for detecting the condition in which the yarn is nearly finished in any bobbin and for stopping the machine automatically prior to having to suffer from damage to the article being knitted. A system of fixed and movable contacts associated to each section of the bobbin is provided, the movable contacts being responsive to the presence and the pressure of the yarn so that when the yarn pressure on the bobbin stud begins to be released, the movable contact closes an alarm and stopping circuit.