False twisting device

Claim 1

A false twisting device comprising a plurality of false twisting spindles each including a turbine, said turbines being rotatable in response to a fluid passing therethrough, said turbine having a hollow shaft and the false twisting spindle including a twister pin mounted in said hollow shaft extending transversely thereof, a turbine rotation number detector operably associated with each false twisting spindle turbine for detecting turbine rotation and providing electrical pulses corresponding to the speed of rotation of the associated turbine, a rotation number prescribing device for prescribing the speed of the turbines in terms of a rotation number, a scanner for scanning the rotation number detectors associated with the false twisting spindles separately, a comparator for receiving the signals from the rotation number prescribing device and the turbine rotation number detectors and comparing the information from the rotation number prescribing device and the individual turbine number detectors separately, a controller connected to the scanner and comparator for providing an output signal in response to differences in the signals compared in the comparator, and a servo valve connected to each of the false twisting spindles responsive to the controller for varying the fluid passed to the particular false twisting spindle associated therewith in response to signals from the controller for regulating the fluid to the false twisting spindle to regulate the speed of the spindle in accordance with the rotation number prescribing device whereby the spindles are caused to rotate at a speed determined by the rotation number prescribing device.