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US 4,125,135 AGranted
Device for exerting back-pull on the heddles of Jacquard looms
OwnerWolfgang Ebischinventor
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OwnerWolfgang Ebischinventor
Estimating the term…
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.
A back-pull device for use on heddles of Jacquard looms, said device comprising a piston connected to a first end of each heddle, means at a second opposite end of each heddle for selectively controlling the movement of each heddle between at least two different positions, a cylinder guide receiving each piston in sealed sliding relation, said cylinder guides being carried by a wall of a chamber in which a pressure different from atmospheric pressure is maintained, said cylinder guides opening into said chamber, opposite ends of said piston being subjected to atmospheric pressure and said pressure in said chamber to normally draw said pistons towards said chamber and away from both of said two different positions, and each heddle extends from its respective piston.
Dependencies are inferred from the claim text.