Filling detecting device for narrow fabric loom

• US 3,891,011 A
• Filed: 01/29/1973
• Issued: 06/24/1975
• Est. Priority Date: 01/29/1973
• Status: Expired due to Term

• Current Assignee: Ben F. Hall, Leon C. Rollison, Robby R. Tisdale
• Original Assignee: Ben F. Hall, Leon C. Rollison, Robby R. Tisdale
• Inventors: Tisdale, Robby R., Rollison, Leon C., Hall, Ben F.
• Primary Examiner(s): Kee Chi, James
• Application Number:
  US05/318,916
• Time in Patent Office: 876 Days
• Field of Search: 139/370-376
• US Class Current: 139/372
• CPC Class Codes: D03D 51/34 Weft stop motions

Abstract

A filling detecting device for a narrow fabric loom has drop wires mounted on the breast beam for pivotal movement intermediate their ends adjacent a selvage of each narrow fabric delivery for movement responsive to a condition of filling yarn beyond a selvage actuating electrical means producing a change in operating condition of the loom in the absence of filling yarn.

Claims

1. A filling detecting device for a narrow fabric loom having a stationary support member and a lay carrying a plurality of shuttles each traversing a respective narrow fabric delivery supplying filling yarn thereto, said yarn extending beyond a selvage of each delivery as the shuttles traverse comprising:

a plurality of pairs of interconnected pivoted elongated drop wires spaced so that one drop wire of each pair is positioned adjacent a selvage of each delivery;

means pivoting each pair of drop wires about a horizontal axis parallel to the lay in a medial portion thereof;

means mounting said drop wires for movement responsive to a condition of filling yarn carried by the stationary member;

said drop wires extending into engagement with said filling yarn adjacent a selvage;

electrical means actuated by the drop wires producing a change in operating condition of the loom in the absence of filling yarn, and a yarn engaging portion carried adjacent one end of the drop wires and an electrical contact portion carried adjacent the other end of the drop wires.

2. The structure set forth in claim 1, wherein stationary member is a breast beam, and said lay actuates switch means actuated by the lay energizing electrical means for stopping the loom responsive to the drop wires, when said lay is in a forward position, in the absence of yarn extending beyond the selvage.

3. The structure set forth in claim 2 including, an electrically conductive means extending across said fabric delivery, and wherein said drop wires pivot in the presence of said filling to open a circuit which would otherwise stop the loom.

4. A filling detecting device for a narrow fabric loom having a stationary support member and a lay carrying yarn supplying means traversing a narrow fabric delivery supplying filling yarn thereto, said yarn extending beyond a selvage of said delivery on each traverse comprising:

a pair of pivoted elongated drop wires spaced so as to be positioned adjacent a selvage of said narrow fabric delivery;

means mounting said drop wires for movement responsive to a condition of filling yarn carried by the stationary member including a pivoted horizontally disposed longitudinal bar carrying said drop wires in a medial portion thereof at right angles thereto;

said drop wires extending into engagement with said filling yarn adjacent a selvage;

electrical means actuated by the drop wires producing a change in operating condition of the loom in the absence of filling yarn; and

a yarn engaging portion carried adjacent one end of the drop wires and an electrical contact portion carried adjacent the other end of the drop wires.