Device for shedding warp yarns in a weaving loom

Details Device for shedding warp yarns in a weaving loom Device for shedding warp yarns in a weaving loom

1980-07-23

1982-07-06

Jaudon, Henry

Textiles: weaving

Warp manipulation

Shedding

139 79, D03C 500

Patent

active

043378013

ABSTRACT:
A device for shedding warp yarns in a weaving loom, such as a jet loom, comprises: cranks supported on machine frames of the loom rotatable in synchronization with the weaving operation of the loom; synchronizing levers swingably pivoted; connecting rods connecting the cranks with synchronizing levers so that the rotational movement of the cranks is transmitted as a swinging motion of the synchronizing levers; synchronizing links linked with the synchronizing levers; rocking levers linked with the synchronizing links so that the rotational movement of the cranks is transmitted as a swinging motion of the rocking levers through the swinging motion of the synchronizing levers; and heddle frames, for the upper and lower warp yarns, operated by the rocking levers. The synchronizing levers and synchronizing links are so arranged that, when the connecting rods are located at their dead points which correspond to the uppermost or lowermost position of the heddle frame, one of linking pivots linking synchronizing levers with the synchronizing links is near a line formed by the synchronizing levers and links when they are at their dead points. As a result, the time period wherein the warp yarns serve as upper warp yarns is made different from the time period wherein the warp yarns serve as lower warp yarns, and a difference in tension is created in the upper and lower warp yarns when the beating operation is effected.

REFERENCES:
patent: 2408645 (1946-10-01), Hunt
patent: 3108617 (1963-10-01), Nichols
patent: 3168116 (1965-02-01), Krenz
patent: 4170250 (1979-10-01), Farley

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