producing a variable tension thereon when activated application_number US 77195477 A description now referring to the figures and more particularly to fig1 showing a pictorial representation in simplified form of a variable denier drawing apparatus 10 having means to propel a running length of filament yarn 12 the drawing apparatus 10 includes a feed roller 14 and its associated snubbing roller 16 a draw roller 18 with its cooperating separator roller 20 idler pulleys 22 and 24 guide the filament 12 to a pair of pull rollers 26 and 28 or alternatively a take up bobbin not shown in the prior art as discussed before the stretching of the yarn is normally caused by the draw roller 18 operating at a much higher speed than the feed roller 14 or it may be accomplished by providing the draw roller with a greater diameter and permitting it to operate at a greater speed than that of the feed roller in the preferred embodiment of the invention there is disposed between the feed roller 14 and the draw roller 18 an electrically activated tension means 30 which may be activated by conventional means not shown and may include a rotary solenoid or servomechanism motor 32 and an output shaft 34 journaled in a bearing 36 and connected to the armature of the tension means 30 the output shaft 34 is provided at its distal end 38 with.