EP 0245236 B1 19891018 - PROCESS AND DEVICE FOR MEASURING THE WARP TENSION IN AUTOMATIC LOOMS AND SIMILAR
Title (en)
PROCESS AND DEVICE FOR MEASURING THE WARP TENSION IN AUTOMATIC LOOMS AND SIMILAR
Publication
Application
Priority
CH 325585 A 19850726
Abstract (en)
[origin: WO8700562A1] For measuring the tension of a yarn layer (10) or of a warp (11) in an automatic loom or similar, a vibratory component (20) which can pivot around an axis (23) is arranged in the region of the layer of material from a straight line. The vibratory component (20) is made to vibrate by means of an excitation arrangement (30). The resulting frequency (fo) of the vibratory component (20) depends directly on the tension P of the yarn layer or of the material and can thus be determined from the frequency fo. The vibratory component (20) can, by simply sliding of the yarn layer (10) or material (11) on its surface (24), be made to vibrate at a natural frequency fo, which can be measured by a sensor (34) and converter (35). A particularly advantageous design of the vibratory component (20) can be achieved by giving it the shape of a plate with a notch (26), which is placed on a blade (27). To eliminate vibrations inherent in the vibratory component (20) the latter can be equipped with a counterweight (27) which moves the centre of gravity of the system to the point of intersection fo the tensile forces exerted by the yarn layer or material.
IPC 1-7
IPC 8 full level
G01L 5/10 (2006.01); B65H 59/40 (2006.01); D03D 49/04 (2006.01); D03D 49/18 (2006.01)
CPC (source: EP US)
B65H 59/40 (2013.01 - EP US); D03D 49/04 (2013.01 - EP US); B65H 2701/31 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE DE FR GB IT
DOCDB simple family (publication)
WO 8700562 A1 19870129; CH 668443 A5 19881230; DE 3573810 D1 19891123; EP 0245236 A1 19871119; EP 0245236 B1 19891018; JP S63500472 A 19880218; US 4794802 A 19890103
DOCDB simple family (application)
CH 8500125 W 19850827; CH 325585 A 19850726; DE 3573810 T 19850827; EP 85904080 A 19850827; JP 50373485 A 19850827; US 4436587 A 19870324