Patent GB-358528-A (GB)
Title: Improvements in tension regulators for thread and filament winding machines
IPC: B65H59/30
Filed: 1930-04-03
Abstract: 358,528. Tension, traverse, and stop apparatus for thread and filament winding machines. GRIBOJEDOFF, M., 91, Erpingham Road, Putney, London. April 3, 1930, Nos. 10599 and 17840. [Class 120 (ii).] A tension device for thread and filament winding- machines comprises two sets of co-operating rollers, between which the thread passes in a sinuous course, carried by plates capable of swinging about spaced pivots. In the preferred form, the sets of rollers are conical with their surfaces oppositely arranged so that a twist is imparted to the thread as it passes between them, and the plates are supported on a movable member, which carries a guide-roller contacting with the winding-bobbin, whereby the thread is drawn between the rollers, and is oscillated by the bobbin to effect the movement of the device along a screwed spindle to build the bobbin, as described in Specification 338,861, [Class 120 (ii), Spinning, twisting, &c.]. A conductor bar, normally forming a bearing for an intermediate bar mounted on the screwed spindle and carrying a spring to act upon the pivoted roller plates, controls stop-apparatus. As shown, the device is applied to a machine wherein the winding- spindles 2 are rotated and reciprocated, preferably by the means described in Specification 338,889, [Class 120 (ii), Spinning, twisting, &c.]. Tensioning- rollers 10, 11 are freely mounted in plates 8, 9 pivoted respectively at 15, 12 in a plate 6 which also carries a grooved guide-roller 19 in contact with the bobbin and driven thereby. The plate 9 is provided with a slotted portion 13, engaged by a pin or roller 14 depending from the plate 8, a spring 16, Fig. 7, carried by an intermediate bar 17 tending to bring the plates into the operative position so that thread is drawn in a sinuous course between the rollers. The larger ends of the rollers extend into recesses 18 in the plates 8, 9 to prevent jamming of the thread. The plates 8, 9 may be connected at the " leading-cut " end by a detachable leaf spring 56, Fig. 12, adjustably mounted on the plate 8 and engaging the spindle 58 of the end roller 11 on the plate 9 or the edge of the plate, or a simple extension of the plate 8 may engage the spindle 58 so that the relative movement of the plates will be comparatively small at the "leading-out" end, and the detachable spring enables the relative movement of the plates to be greater at the "leading-out" or " leading-in " end as desired. The roller 19 may be formed in two parts adapted to clean the yarn and spring-supported to yield to obstruction. An additional tension is applied to the yarn between the roller 19 and the bobbin by reason of the difference in speed between the peripheral speed of the part of the roller in contact with the bobbin and that of the groove 20 with which the travelling thread is engaged. The degree of tension is higher than the ordinary by reason of the proximity of the roller 19 to the cop, the resistance to breakage of the staple or fibre being greater than that of the thread. The traverse is effected by a lever 22, which is connected to the spindle 21 of the roller 19 and is thus oscillated about an adjustable pivot 26 in the intermediate bar 17 as the roller moves along the conical surface of the bobbin, and operates a ratchet wheel 24 on the spindle 7. The position of the roller 19 may be adjustable, and rollers of different diameters may be used to vary the amplitude of the oscillation of the plate 6 and the speed of feeding. A conductor bar 30, which may be provided with cam surfaces to assist in the shaping of the bobbin, is urged by an adjustable spring 37 in an anticlockwise direction and normally engages a recess 41 in an arm 39 of the intermediate bar 17. In the operative position, the end 35 of the spring 16 carried by the intermediate bar 17 engages the lower plate 9 and tends to rock it in an anticlockwise direction, and the pin-and-slot connection 13, 14 normally imparts a corresponding movement to the plate 8, but permits relative movement, such movements effecting the tension of the thread. The reaction of the spring 16 against the tension of the thread holds the conductor plate 30 and the intermediate bar 17 in position, so that when the spring is ineffective the conductor bar is released and is moved by the spring 37 into the position shown in Fig. 4 to open the plates by engagement with an arm 43 and rock the platform 6 to remove the roller 19 from the bobbin, and also, by means of a bracket 48, to remove the spindle from the driving-drum 5. The spring is rendered ineffective when the thread breaks, the plates then overlapping to such an extent that the spring engages a stop 46, and when the bobbin is fully wound and the arm 39 registers with the slot 42 in the conductor bar.