Spring dampened shedding device
AssigneeDeutsch Institute fur Faserforschung
InventorsHans-Jürgen Bauder, Helmut Weinsdörfer
Life of this patent
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Abstract
A shedding device in a jacquard loom, having a heddle with a retracting spring rigidly anchored in the loom or to the floor for urging the heddle to a lower shed forming position. To suppress the development of resonance in the spring, a core element is provided, which contacts the inside of the spring at points spaced apart from one another and forces the spring to take a course which deviates from the rectilinear. As a result, friction forces that contribute to damping the spring motion are created between the spring and the core element.
Claims29
A shedding device (1) for a loom, such as a jacquard loom, comprising a heddle (8) which includes an eyelet (9) from which heddle shafts (12, 13) extend on diametrically opposed sides,
- a drive device for longitudinally moving said heddle (8), one of said heddle shafts (12) being coupled with said drive device (2) and the other of said heddle shafts (13) having a connecting device (27),
- an elongated helical spring (14) having one end mounted on said connecting device (27) for moving said heddle (8) in a retracting direction,
- an anchor (16) fixedly anchoring the other end of the helical spring (14);
- and
- a longitudinally extending damping element (22) having a nonrectilinear shape defined by a plurality of longitudinally spaced protrusions in contact with said helical spring at at least a corresponding plurality of longitudinally spaced-apart points for forcing and causing the helical spring to take a nonrectilinear shape along an elongated length thereof.
A shedding device (1) for a loom, such as a jacquard loom, comprising a heddle (8) which includes an eyelet (9) from which heddle shafts (12, 13) extend on diametrically opposed sides,
- a drive device for longitudinally moving said heddle (8), one of said heddle shafts (12) being coupled with said drive device (2) and the other of said heddle shafts (13) having a connecting device (27),
- a helical spring (14) having one end mounted on said connecting device (27) for moving said heddle (8) in a retracting direction,
- an anchor (16) fixedly anchoring the other end of the helical spring (14);
- and
- a helical shaped damping core element (22) disposed in said helical spring (14) in contact with said helical spring at at least a plurality of spaced-apart points for forcing and causing the helical spring to take a nonrectilinear shape.
A shedding device (1) for a loom, such as a jacquard loom, comprising a heddle (8) which includes an eyelet (9) from which heddle shafts (12, 13) extend on diametrically opposed sides,
- a drive device for longitudinally moving said heddle (8), one of said heddle shafts (12) being coupled with said drive device (2) and the other of said heddle shafts (13) having a connecting device (27),
- a helical spring (14) having one end mounted on said connecting device (27) for moving said heddle (8) in a retracting direction,
- an anchor (16) fixedly anchoring the other end of the helical spring (14);
- and
- a damping core element (22) disposed in said helical spring (14) having protrusions disposed along a helical line in contact with said helical spring at at least a plurality of spaced-apart points for forcing and causing the helical spring to take a nonrectilinear shape.
Dependencies are inferred from the claim text.