| 摘要 |
Supply spindle for high speed upstroke twisting. A blade, which surrounds an upstanding, stationary core of the spindle, has a cap removably mounted on its upper end, for rapid rotation with the blade. A filament-twisting rotor is mounted on the cap, for rotation therewith and for filament-twisting motion relative thereto. The supply package of filament is mounted on the blade, below the cap, and filament is unwound from this package. A short length of the unwound filament always runs to and over the cap, and to an upper central part of the twisting rotor, for the application of twist and for guidance to an overlying collector spindle. The filament is kept under extremely low tension, and this tension is kept substantially uniform. For these purposes the core and blade are constructed so as to avoid vibratory criticality at normal high-speed rotation of the spindle, and rapidly to dampen vibrations of the core, blade and supply package while the rotational speed rises to or falls from the normal speed, which typically amounts to multiples of 10,000 rpm.
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