Device for exerting back-pull on the heddles of Jacquard looms

Details Device for exerting back-pull on the heddles of Jacquard looms Device for exerting back-pull on the heddles of Jacquard looms

1977-07-12

1978-11-14

Kee Chi, James

Textiles: weaving

Warp manipulation

Shedding

139 59, 139 85, 139 90, D03C 1300, D03C 322, D03C 344

Patent

active

041251350

ABSTRACT:
This relates to a device for exerting a back-pull on the heddles of Jacquard looms. In such looms the upper end of each heddle is connected to a patterning machine and it is necessary that the lower end of the heddle be connected to a pulling device which applies the necessary pull in the opposite direction to return the displaced heddle. Each heddle has permanently connected thereto a piston which is positioned within a cylinder guide with one end of the cylinder guide being open into a chamber wherein a pressure other than atmospheric pressure is maintained and the opposite end of the cylinder guide is open to the atmosphere in a manner wherein each piston and its associated heddle is displaced away from the patterning machine. The pull-back pressure may be varied by varying the pressure within the chamber.

REFERENCES:
patent: 572246 (1896-12-01), Cuscaden et al.
patent: 972349 (1910-10-01), Drury
patent: 2558284 (1951-06-01), Whitaker
patent: 3853150 (1974-12-01), Romano

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