262results about "Dobbies" patented technology

The invention discloses a rotary type multi-arm shedding mechanism, belonging to the technical field of textile machinery. The rotary type multi-arm-shedding mechanism comprises a main shaft, swing arms, eccentric discs, a spline disc, clutch claws arranged on the eccentric discs, a first signal swing arm, a second swing arm and an iron-absorbing swing arm, wherein one end of the first signal swing arm is composed of a first swing arm meshing face, and the other end of the first signal swing arm is composed of a first iron-absorbing swing arm contact pin; one end of the second signal swing arm is composed of a second swing arm meshing face, and the other end of the second signal swing arm is composed of a second iron-absorbing contact pin; and the iron-absorbing swing arm is arranged on an iron-absorbing swing arm shaft. The rotary type multi-arm-shedding mechanism is characterized in that the meshing face of the firs eccentric disc and the second eccentric disc are of the shape of a semi-circular-arc concave face, the meshing face of the first swing arm and the meshing face of the second swing arm are of the shape of a semi-circular-arc concave face, the radius of the semi-circular-arc concave face is identical to that of the semi-circular-arc concave face, in addition, a first distance from the meshing face of the first eccentric disc to the rotation axis of a main shaft is identical to a second distance from the meshing face of the second eccentric disc to the rotation axis of the main shaft. The rotary type multi-arm-shedding mechanism has the advantages of contributing to guaranteeing a shedding action effect and saving energy and ensuring the quality of textiles.

The present invention provides a heald-frame height adjusting apparatus to make it possible to overcome the problems by providing a heald-frame height adjusting apparatus that easily adjusts the height of a heald frame and that reduces manufacturing costs of a shedding device, and that does not allow the shedding device to easily malfunction and that is suitable for high-speed vertical movement of the heald frame. A heald-frame height adjusting apparatus used in a shedding device including a drive transmission mechanism which is provided in accordance with each heald frame, which connects a reciprocating driving device and a heald frame with each other, and which is capable of changing a supporting height of the corresponding heald frame. The heald-frame height adjusting apparatus includes engaging means and raising-lowering means, the engaging means being engageable with and disengageable from the heald frame and being engaged with the heald frame when the height of the heald frame is adjusted before starting an operation of a loom, the raising-lowering means being placed at a securing portion of the loom and moving the engaging means vertically with respect to the securing portion.

Various embodiments are described relating to method of producing a synthetic field surface. In one embodiment, the method includes providing a plurality of warp yarns; providing a plurality of fill yarns; providing a plurality of pile yarns of a first type; providing a plurality of pile yarns of a second type; providing a plurality of dummy yards; weaving the plurality of pile yarns of the first type with the plurality warp yarns and the plurality of fill yarns for a first predetermined distance to form a backing; weaving the plurality of pile yarns of the first type with the plurality of dummy yarns to form a plurality of short hoops for a second predetermined distance; cutting the plurality of pile yarns of the first type to form a first plurality of upstanding ribbons representing grass to produce a synthetic field surface.

The dobby has, at each blade level thereof, a vibration element associated with an operation element, at least one movable connecting element supported by the operation element and two swing levers receiving, at one side, action of a reader and, at the other side, action of a elastic device. The elastic device connects a catch of the swing lever with a jamming face, set at the operation element, or the connecting element and the lever connected with the jamming face is out of a selector of the reader. And a mechanical element independent from the reader moves, resisting to the action of the elastic device, the lever having the catch unconnected with the jamming face. Thereby, the lever does not interact with angular motion of the selector.