Abstract: A device for measuring the warp yarn tension of a woven fabric in a loom, which includes a fixed deviation bar which extends across the entire loom width and cooperates with a device measuring warp yarn tension, the fixed deviation bar having a central or intermediate portion for the fabric under formation, the intermediate portion being of a length less than that of a minimum formable fabric width and being detached from the remaining sections of the bar by thin breaks in the deviation bar. The intermediate portion is supported via at least one load cell. The device is located in the loom to measure the tension of the fabric already woven and prior to its being wound on the winding beam.

Abstract: A device for automatically controlling the warp yarn tension in a loom in which the fixed deviation bar for the fabric under formation is supported only at its ends. A deformation sensor, moreover, is directly supported on the deviation bar. The deformation sensor is electrically connected to a comparator to which an adjustable set-value unit is also connected, the output of the comparator being used to drive the geared motor of the warp yarn feed beam to control the warp yarn tension.