| 摘要 |
The apparatus for measuring the length of filamentary material, such as a yarn or thread, wound-up at individual ones of a number n of winding or spinning locations in a textile machine cooperates with an electronic scanning or interrogation device. The latter monitors the thread run at the aforementioned locations by means of a number n of scanning heads. The apparatus is constituted by a series circuit comprising a shift register including a number n of parallel outputs, a number n of storage members, a number n of AND-gates, a number n of electronic counters, a comparator, a number n of electronic switches and a number n of relays, as well as a sensor detecting the number of revolutions of a drive element, and a reference or set value transmitter. When reaching a fixed number of revolutions inputted into the reference value transmitter, and thus, a distinct length of yarn or the like, the related winding or spinning unit is stopped by the relay associated therewith.
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