Improvements in Top Rollers of Machines for Doubling and Twisting Yarn and in Apparatus for Adjusting the Cap Bars or Bearings of the said Rollers.
Year: 1887

page_text: Improvements in Top Rollers of Machines for Doubling and Twisting
Yarn and in Apparatus for Adjusting the Cap Bars or Bearings
of the said Rollers.
I, CHARLES WILLIAM LANCASTER of Willow Iron Works, Accrington, in the
County of Lancaster, Machine Maker, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This Invention relates to the class of Machines for purpose aforesaid wherein the
continuance in working position of the top roller is dependent on the continuity of
the yarn or yarns, for so soon as the latter is or are broken, the top roller by
gravitation descends an incline on its bearings or "cap bars," and separates the top
roller from contact with the bottom roller, i.c. its driving roller, and thus stops
delivery of yarn or twist, and the object of the invention is by improved means and
appliances to ensure correct adjustment and relative working position for such top
roller in relation to its bottom or driving roller, which object I attain by application
and use of certain adjusting and supporting screws on and between which the bearing
or cap bar is supported and held in position.
Such being the nature and object of my said invention, the following is a complete
description of same reference being had to the accompanying drawings forming a part
of this Specification, in which
Fig. 1 is an end view partly in section shewing rollers, roller bearing
or cap bar.
Fig. 2 is back clevation shewing two or three of the cap bars in position.
At 1 is the roller beam carrying standard or bracket 2, at 3 is the bottom roller,
4 the top roller, 5 is the inclined bearing or cap bar, is an adjusting screw on head
of which the foot of the bar 5 rests, 7 is a similar screw against which the bar 5 rests,
8 is a set screw by means of which the part 9 of the said bar 5 may be forced and
held tightly to the face or flat head of the screw 7, whilst the head of the screw 6
forms a foot or rest for bottom edge of the bar 5. At 10 is the traverse rod and
guide through which the "ends "
or yarn 11. 12 pass to the rollers 3 and 4, the
tension or strain on the doubled yarn at 12ª serves to keep the rollers 4 in their
working position at the top of the incline as shewn at Fig. 1, but when the yarn is
broken, the top roller rolls upon its axle 13 down the inclined portion of the bar 5, to

page_text: the position shewn in dotted lines, and so contact between the said rollers is lost or
broken, and consequently the delivery of yarn ceases until "pieced up," whereon
roller again assumes position at the head of this incline, as shewn in full lines in
Fig. 1.
It will be seen that by means of the screws 6, 7, 8, the adjustment of the cap
bar 5, can be secured with nicety, and thereby to ensure correct adjustment of the top
roller 4, in relation to the bottom roller 3, so that the centre of the axis 13, shall be
slightly within, or to the right of a vertical line "a" of the bottom roller, thereby the
roller 4 is, without putting any undue strain on the yarn or ends to be doubled or
twisted in position, to ensure its immediate descent to the position shewn by dotted
lines, and stop the delivery of twist.
Near the ends of the said rollers I form a recess or groove, as shewn at 4",
which
serves to keep the yarn from slipping off the roller, to the right or to the left, as when
the frame is not running, the yarn is then slack, and by the reason of the twist in it, is
apt to move off, the end of the rollers, as heretofore made.
When doubling two folds of yarn the breaking of one end, brings about the breaking
of the other, because the spindle runs in the reverse sense to spinning, and takes out
the twist of the single end, thus rendering the yarn too feeble, to withstand the weight
of the top roller 4 and the drag of the traveller on the ring.
For twisting three or more ends together, the weight of the traveller, is so
chosen, as to cause the remaining ends to break, by reason of the drag of the
traveller, being too hard or too heavy for the remaining ends to withstand, when
one is broken, or when one is absent.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what
I claim is
1. The arrangement and mode of adjusting by screws 6. 7. 8 in combination with,
and for purpose of adjusting the cap bars 5 and rollers 4 as herein set forth and
fully illustrated by annexed drawings.
2. The rollers 4 recessed as at 44, in combination with plain bottom rollers 3, and
cap bar 5, for purpose and as herein fully described and illustrated by annexed
drawings.
Dated this 13th day of December 1887.