Thread tension control apparatus for textile machinery

Winding – tensioning – or guiding – Strand tensioning device – Clamp

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Details

66146, 226195, B65H 5922

Patent

active

039919544

ABSTRACT:
A pair of pressure disks through which the thread may pass are pressed together by a controllable electromagnetic force generated by a pressure electromagnet acting on at least one of the disks. The thread is passed over an oscillating lever which is urged by the tension of the thread from a first position to a deflected position and, when in the deflected position, closing an electrical contact which opens the circuit to the pressure electromagnet acting on the disks to return the lever to the first position, thus opening the contact. The magnetic force of a lever reset magnet is adjustable. The interrupted signal generated by the opening and closing of the contacts as the thread deflects the lever and it is reset by the electromagnetic force is used to control the coil current through the pressure electromagnet so that the pull-off tension will always be dynamically varied in dependence on changes of thread characteristics, wear of the pressure disks and the like due to control of the actual pressure exerted by the pressure disks transferred to the oscillating lever.

REFERENCES:
patent: 2907535 (1959-10-01), Mindheim et al.
patent: 2912185 (1959-11-01), Vossen
patent: 3351296 (1967-11-01), Frei
patent: 3372888 (1968-03-01), Eppendahl

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