Improvements in Machines for Twisting Yarns or Threads.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Machines for Twisting Yarns or Threads.
We, EDWARD HOLLINGWORTHI, of the Firm of Hutchinson, Hollingworth and
Company, Limited, of Colne Road, Huddersfield, in the County of York, Machine
Makers, and WILLIAM MITCHELL, of the same place, Manager, do hereby
declare the nature of this invention to be as follows:-
This invention refers to that class of twisting frame wherein is employed a well
known form of mechanism for “knopping" or forming knops or protuberances on
the yarn.
Hitherto the principal shaft of the knopping mechanism has been driven
in a very unmechanical manner from the bottom fluted roller employed in this
class of machinery. As is well known the bottom fluted roller is made up in
sections, having square ends and fitting into corresponding square openings in the
next length of roller, and as these rollers are of considerable length there is
necessarily torsional strain put upon the said rollers causing the square ends to be
worn in shape.
According to our invention we drive the knopping shaft in a more direct manner
(not from the fluted roller) and to do this we employ an additional shaft driven by
the main gearing on the driving end of the machine.
This additional shaft extends about midway of the length of the frame, and
imparts motion to the middle part of the knopping shaft by a suitably shaped
tappet or cam. By this means the knopping shaft is driven uniformly throughout
its length, the torsional strain being now avoided whilst the knopping of the yarn
can be changed by moving a stud in connection with the lever operated by the
tappet, thus the use of a chain wheel for that purpose is rendered unnecessary.
Dated this 4th day of September 1895.
TASKER & CROSSLEY,
Huddersfield, Patent Agents.
Improvements in Machines for Twisting Yarns or Threads.
We,
EDWARD HOLLINGWORTH, of the Firm of Hutchinson, Hollingworth and
Company, Limited, of Colne Road, Huddersfield, in the County of York, Machine
Makers, and WILLIAM MITCHELL, of the same place, Manager, 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 refers to that class of twisting frame wherein is employed a well
known form of mechanism for knopping yarn.
Hitherto the principal shaft of the knopping mechanism has been driven in a
very unmechanical manner from the bottom fluted roller employed in this class of
machinery.
As is well known the bottom fluted roller is made up in sections, having square

page_text: ends and fitting into corresponding square openings in the next length of roller,
and as these rollers are of considerable length there is necessarily torsional strain
put upon the said rollers, causing the square ends to be rounded or worn away.
According to our invention we drive the knopping shaft in a more direct manner
(but not from the fluted roller) and to do this we employ an additional shaft driven
by the main gearing on the driving end of the machine.
This additional shaft extends about midway of the length of the frame, and
imparts motion to the middle part of the knopping shaft by a suitably shaped
tappet or cam.
In order that our improvements may be clearly understood, we will make
reference to the accompanying sheet of drawings, illustrative thereof, wherein
Fig. 1, is end view of our improved mechanism, and Fig. 2 front elevation of a
portion same. A represents the framework of the machine, B the main driving
shaft which by a train of toothed wheels C imparts rotary motion to the bottom
fluted roller D which, as already explained, is a long one and put together in
sections. E is the knopping shaft and I the knopping rail for giving to the yarn
the knops and twists well known to the trade but which forms no part of our
invention.
Instead of operating the knopping shaft E from the bottom fluted roller D as
formerly, we impart a rocking motion to the said shaft E by means of a cam G
fastened upon the additional shaft H, the said cam receiving its motion from an
additional train of gearing I. On the knopping shaft E is a slotted lever J to
which is adjustably secured by stud M another lever K provided with a radial
slot Kand having on one end thereof a bowl L engaging with the cam G so that
as the said cam G revolves the knopping shaft E is made to rock and thus give a
reciprocatory motion to the knopping rail F for giving the desired effect to
the yarn.
The additional or cam shaft H extends about midway the length of the machine
and it operates the knopping shaft at about midway of its length by which means
the said knopping shaft is driven uniformly throughout its length and the torsional
strain hitherto put upon the fluted roller D is now avoided, whilst the knopping of
the yarn can be varied to any extent by moving either or both of the studs M, M'
in the respective slots through which they are passed to alter the distance of
lever K from shaft E and vary the angle of said lever with respect to cam G,
consequently the use of change wheels hitherto employed for that purpose is now
unnecessary.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what we
claim is :-
In machines for twisting yarns or threads, the means or method of operating the
knopping shaft substantially as herein shewn and described.
Dated this 2nd dow of Lun 180€
TASKER & CROSSLEY,
Huddersfield, Patent Agents.