Device for detecting knot-like thick places in travelling textile threads
AssigneeGebruder Loepfe AG
InventorsErich Weidmann, Hans Zollinger
Life of this patent
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Abstract
Novel device for detecting knot-like thick places in travelling textile threads, comprising a plate-shaped or rectangular vibratory member which is fixed at one end and has a straight edge at its other end. A plate-shaped piezoelectrical transducer element is fixed at one of the major surfaces of said vibratory member. A thread guiding member having a straight edge is arranged in essentially parallel relationship to the straight edge of the vibratory member such as to form a thread passage gap between said straight edges. Means adjust the width of said thread passage gap, and a case or support structure is provided for receiving the vibratory member, electromechanical transducer element and thread guiding member.
Claims2
A device for detecting knot-like thick places in travelling textile threads, comprising:
- a support structure;
- a mechanical vibratory system comprising:
- a vibratable plate-shaped member having two opposite ends, one of which is fixed at the support structure and the other of which is free and formed with a first straight edge;
- a plate-shaped piezoelectrical structure fixedly attached to one major face of said vibratable plate-shaped member and responsive to vibration thereof;
- the mechanical vibratory system having a fundamental frequency below 100 Hz;
- a thread guide member mounted at the support structure and formed with a second straight edge arranged substantially parallel to and in opposite relationship to said first straight edge such that a thread passage gap is formed between said first and second straight edges;
- and
- means for adjusting the width of said thread passage gap.
Dependencies are inferred from the claim text.