METHOD OF REGULATING THE ROTATIONAL SPEED OF A STORAGE DRUM OF A THREAD DELIVERY DEVICE FOR A THREAD-PROCESSING MACHINE, AND APPARATUS FOR PUTTING THE METHOD INTO PRACTICE

摘要

1390054 Thread storage feeders; thread unwinding apparatus K I J ROSEN 25 May 1972 [25 May 1971] 17574/74 Divided out of 1390053 Headings D1C and D1J In a thread storage feeder the electric motor driving the wind-on mechanism is powered, during normal operation, by pulses at such a rate as to keep the thread store 17 almost constant in size and the winding mechanism in continuous motion to maintain the reservoir size within Œ5% of a predetermined mean valve. A conventional tilting sensor 9 monitors the size of the thread store 17 and pushes a rod 15 to move a spring-biassed conducting sphere out of and into contact with electric contacts 13. Frequent switching is stated to enable the thread store to be maintained within limits of Œ1.5%.