Constant tension regulator of positively unwound flexible material, particularly warp threads in weaving machines
AssigneeVyzkumny a vyvojovy ustav Zavodu vseobecneho strojirenstvi
InventorsJindrich Henzl, Jindrich Cerny, Jaromir Malasek
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Abstract
A constant tension regulator for controlling the tension of positively unwound flexible material, particularly warp threads in a weaving machine. Means are operatively mounted on the frame of the regulator for sensing changes in tension in the unwinding flexible material. These sensing means output a control movement in accordance with sensed tension in the unwinding flexible material which is translated to a mechanical integrating unit and a proportional adjusting unit, arranged in parallel, which jointly transmit a control variable adjustment to the driving means of the warp beam thereby adjusting its rotary speed in accordance with the sensed tension.
Claims8
A constant tension regulator for controlling the tension of positively unwound flexible material such as warp threads, comprising in combination,
- a support frame,
- a warp beam rotatably supported in said frame and adapted to unwind a plurality of warp threads therefrom,
- sensing means contacting said plurality of unwinding warp threads to thereby sense the variations in tension in said threads, a change in tension in said threads causing a change of position of at least a portion of said sensing means;
- an integrating unit operatively mounted in said frame and adapted to effect a first output corresponding to said change of position of said sensing means;
- a proportional adjusting unit operatively mounted in said frame and adapted to effect a second output corresponding to said change of position of said sensing means;
- means operatively connecting said integrating unit and proportional adjusting unit to said sensing means, said integrating unit and proportional adjusting unit having common means for adding said first and second outputs;
- and
- a control member operatively connected, on the one hand, to said warp beam, and, on the other hand, to said common means to thereby adjust the unwinding speed of said warp beam in accordance with the tension sensed in said threads.
Dependencies are inferred from the claim text.