Pulling capacity sensor of elongated formations, particularly threads

The invented pulling capacity sensor of elongated formation, particularly of textile threads comprises at least one triplet of the elongated formation guides (12, 22) with the elongated formation guide surfaces (120, 220), whereby between the pair of the elongated formation extreme guides (12) there is situated the central elongated formation guide (22), which is coupled with a deformation measuring element (2) that is provided with means for detecting its deformation and which are connectable to a record and/or evaluation device. The distance (hi1) of a common tangent (4) to guide surfaces (120) of the elongated formation of both the elongated formation extreme guides (12) on bottom side of these elongated formation extreme guides (12) from a tangent (6), being parallel to said common tangent (4), to the elongated formation guide surface (220) of the elongated formation central guide (22) on the upper side of the elongated formation central guide (22) differs from the distance (hi2) of the common tangent (5) to the elongated formation guide surfaces (120) of both the elongated formation extreme guides (12) on the upper side of the elongated formation extreme guides (12) from a tangent (7), being parallel to said common tangent (5), to the elongated formation guide surface (220) of the elongated formation central guide (22) on the bottom side of said elongated formation central guide (22).