Thread-break sensor for textile machinery

Details Thread-break sensor for textile machinery Thread-break sensor for textile machinery

1983-04-22

1984-08-21

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

Stopping or starting

57 86, 57 87, D01H 1316

Patent

active

044662360

ABSTRACT:
A device for detecting a break in one of two tensioned threads merging into a yarn comprises a support on which a guide member with two yarn-bracketing pins is pivotable about a horizontal axis. The guide member is provided with a hole penetrated by a stud of smaller diameter having a head with two or more chordal ridges of different peripheral widths each of which, when brought into a horizontal position above the stud axis, contacts a rabbet on the guide member disposed below its center of gravity to hold that member in a metastable position from which it is dislodged by a difference in the tensions of the two threads. When that difference surpasses a certain threshold, upon rupture of one of the threads, the guide member tilts into an unstable position from which it gravitates through substantially half a turn into an inverted stable position, thereby entangling the remaining intact thread with its pins and inhibiting the advance thereof so that it, too, will rupture. In order to change the threshold of instability, the entire stud or its head may be detached and rotated about its axis into an alternate position in which a ridge of different width lies at the top.

REFERENCES:
patent: 2494490 (1950-01-01), Rinehart et al.
patent: 3163341 (1964-12-01), Fisher et al.
patent: 3759026 (1973-09-01), Hope
patent: 4110963 (1978-09-01), Plate et al.
patent: 4292798 (1981-10-01), Gore et al.

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