| 摘要 |
The thread 31 is fed tangentially to a storage roll 10 and taken off it by a thread guide 4 arranged in prolongation of its axis against the action of a retaining element. For measuring the thread length stored on the storage roll 10, the storage roll 10 is provided with a thread rotation monitoring device 50 and a device eg a thread connecting device 23 which issues a signal when the direction of rotation of the thread is reversed, both of which devices are connected to a pulse counter 5. This pulse counter 5 is switched from forwards counting to backwards counting or vice versa on a change in the direction of rotation of the thread. As shown the storage roll is provided in an open end spinning device and takes up thread for the spinner 3 while device 23 is making good a thread breakage. Counter 5 counts the turns of thread placed on roll 10, is switched to backwards counting when take-up roll 6 is reactivated, and when the counter arrives at zero, ie no thread left on the roll 10, switches back to its forward counting mode in readiness for the next thread break. <IMAGE> |
