reference number 1 comprises a device for continuously controlling the tension of a yarn to be supplied to a textile machine and an electronic device for displaying and controlling in a centralized manner possible faults occurring in said feeder each textile machine will be provided with a plurality of these feeder apparatus in this feeder the yarn 2 supplied by a yarn supply r not shown is guided by a first transmission bush element 3 so as to pass through a brake 4 comprising two opposite discs 6 the clamping of which can be adjusted in a known way before deviation by an eye element 8 the yarn will engage a first lever lever 50 adapted to operate in the case of a breakage of the yarn then this yarn will be wound in several turns about a drum 10 including a plurality of slots this drum is rotatively driven through pulley 12 coaxially rigid with the drum and driven by a toothed belt before supplying to the textile machine m the yarn 2 passes through a further eye element 14 and on a second bush element 16 between these two passages the yarn rests on the second movable lever 20 responsive to the tension of the yarn and articulated on the housing 1 at a transversal axis 21.