Patent GB-448890-A (GB)
Title: Improvements in machines for drawing flax, wool and other fibres for forming slivers or yarn
IPC: D01H5/10
Filed: 1935-01-22
Abstract: 448,890. Push - - bar gill - frames. GREEVES, Ltd., J. T. & M., and EVES, H. T., Forth River Mills, Falls Road, Belfast. Jan. 22, 1935, No. 2042. [Class 120 (i)] In a push-bar gill-frame the movement of the bars A<1>, Fig. 1, is controlled so that the rising pins H at the back enter the sliver approximately vertically or at right angles to the plane of the fibres and very close to the back roller F and the descending pins leave the sliver approximately vertically or at right angles to the plane of the sliver and approach very close to the nip of the front rollers G, G<1>, before dropping clear. Each gill bar A<1> is provided with two cranks B<1>, C<1> the pins b, c of which are set respectively at about 90‹ and about 45‹ from the line of the gill pins H. The two cranks B<1>, C<1> may be constructed at opposite ends of the bar A<1>, Figs. 13 and 13a, or both at one end of the bar, Figs. 2, 6, 8 and 14, when the other end is shortened to be free of the driving wheel W and is supported by discs D on the driving shaft. The wheels W are set far back relatively to the feed roller F to ensure a vertical pinning of the sliver at entry. The gill bars A<1> are provided with journals a at each end and traverse a fixed path A carried by the machine frame, a collar a', Figs. 2 and 6, on the bar fitting between the teeth on the driving wheels W, the wheels on each side engaging and lifting alternate bars. The path A is secured by bolts a2 and is provided with a removable block a<3>, Fig. 5a, while its shape may be varied to give a convex reach and return slope. The crank B<1> traverses a fixed cam path or groove B which it enters as the bar A<1> is raised by the wheel W and continues therein as the bar traverses to the front rollers G, G<1>, maintaining the rows of pins H vertical and at a constant distance apart. The crank C<1> traverses a fixed cam path or groove C which it enters as the bar A<1> approaches the front rollers G, G<1> and begins to descend and as the crank B<1> leaves the path B and maintains the descending pins H approximately vertical and at right angles to the plane of the sliver and very close to the nip of the rollers G, G<1>. It also controls the angle of the pins H as the bars A<1> descend the inclined part of the path A. The path B may be disposed relatively to the path A so that in association with the crank B<1> it causes the pins to assume any desired angle, e.g. a slightly backward position. As the pins descend they are caused to lie closely against the following bar thereby reducing to a minimum the distance between the last pin H<1> and the nip of the front rollers G, G<1>. A sliver plate or bridge-piece S with an apron or shield S<1> is placed between the last pin H<1> and the nip of the rollers G, G<1> to prevent the sliver lapping round the pins. The pins are set forward of the centre and near to the front of the leading edge so as to be approximately tangential to the bar. Four different combinations are shown in Fig. 11. The pins may be secured by drilled holes e, notches or solder f; by soldering to a flat on the bar g, or by a brass gill stock h riveted to the bar, Figs. 12 and 12a. To prevent the gill pins H on one bar from pushing against the bar in front, projections are soldered or otherwise fastened thereto, Figs. 15 and 15a.