Heddle frame

{
  "publication_number": "US4230159A",
  "country": "US",
  "kind": "A",
  "title": "Heddle frame",
  "abstract": "An improved heddle frame for a weaving machine. The heddle frame consists of a pair of lateral beams and a pair of side stays attached thereto. Each lateral beam has an inner hollow portion at each end while the side stays have a projection at each end which is inserted into a hollow end portion of a lateral beam. Each projection is freely rotatably fixed in its respective hollow end portion by a pin. The upper surface and lower surface of each projection respectively contact the upper and lower inner surfaces of its respective hollow end portion while said upper and lower surfaces of each projection form a circular surface, the center of which is on the axial horizontal center line of its respective pin.",
  "claims": [
    "1. A heddle frame comprising a pair of projections elongated respectively from an upper portion of an inner side of a side stay and a lower portion of said inner side of said side stay, and respectively inserted into an inner hollow end portion of a lateral beam; a pin freely rotatingly connecting said lateral beam and said projection; the upper surface and the lower surface of said projection which respectively contacts the upper inner surface and the lower inner surface of said inner hollow end portion of said lateral beam being so made as to form a circular surface the center of which is on the axial horizontal center line of said pin.",
    "2. The heddle frame of claim 1, wherein said projection is so made as to be in a body with said side stay.",
    "3. The heddle frame of claim 1, wherein said lateral beam is made of an aluminum hollow body.",
    "4. The heddle frame of claim 1, wherein a packing is inserted between the end surface of said lateral beam and the inner side end portion of said lateral stay.",
    "5. The heddle frame of claim 1, wherein said projection is made of synthetic resin."
  ],
  "description_excerpt": "1. Field of the Invention\n\nThe present invention relates to the improvement of a heddle frame.\n\n2. Description of the Prior Art\n\nA heddle frame as generally used in a weaving machine is composed of a pair of lateral beams 1' and a pair of side stays 2' as shown in FIG. 1A. A projection 3' formed at an inner end of a side stay 2 is connected to an inner hollow end portion 4' of said lateral beam 1', whereby the end portion of the lateral beam 1' and the end portion of the side stay 2' are fixed tightly.\n\nHowever, in an ordinary heddle frame, the outer periphery of the side stary 2' which is fitted to freely slide into a guide groove formed in a guide apparatus, is vertically moved upwards or downwards by actuating the side stays by the aid of a dobby and shedding motion which is performed vertically, during which motion the pair of lateral beams 1', 1', remain in a free state. Therefore, the inertia force caused by the vertical shedding motion is applied to the upper lateral beam 1' and the lower lateral beam 1', whereby the pair of the lateral beams 1' have the tendency to bend into a convex state toward upper direction during the upward stroke of the vertical motion thereof as shown in FIG. 1A, and the pair of the lateral beams 1' have the other tendency to bend in a convex state toward lower direction during the downward stroke of the vertical motion, as shown in FIG. 1B. These tendencies are especially acute in the case of a high speed weaving machine operated with a rotation of 300 rpm to 600 rpm.",
  "cpc": [
    "D03C 9/0675"
  ],
  "ipc": [
    "D03C 9/06"
  ],
  "assignees": [
    "Maruyama Seisakusho KK"
  ],
  "inventors": [
    "Yoichi Shimizu"
  ],
  "filing_date": "1978-12-20",
  "publication_date": "1980-10-28",
  "grant_date": "1980-10-28",
  "priority_date": "1978-06-21",
  "application_number": "US-97155778-A",
  "family_id": "13819211",
  "cited_by_count": 7,
  "citations": [
    "US632834A",
    "US3335759A",
    "US3604469A",
    "US4022252A"
  ]
}