Device for keeping constant both the speed and the tension when

Details Device for keeping constant both the speed and the tension when Device for keeping constant both the speed and the tension when

1981-10-26

1983-10-25

Jaudon, Henry

Textiles: weaving

Warp manipulation

Feeding

D03D 4906

Patent

active

044112939

ABSTRACT:
In a textile loom, the invention comprises a device for varying the speed and the tension of unreeling the warp threads from the warp beam. The device essentially includes a set of interchangeable spur gears connected to the warp beam which cooperate with a system of variable-race sheaves so that when a sheave has its race becoming narrower, the other sheave has its race widened and vice versa. Proper linkages are also provided to ensure that there is always a constant balance between the tension of the warp threads and the speed of rotation of the warp beam. Consequently, as the diameter of warp threads on the beam is decreased and the speed of the warp threads is concurrently decreased, the device imparts a pull increase to the warp threads so that the unreeling speed of the threads from the warp beam is automatically brought back to a preselected constant value.

REFERENCES:
patent: 3308854 (1967-03-01), Pfarrwaller
patent: 3630239 (1971-12-01), Hooper

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