IMPROVEMENTS IN TWISTING MACHINERY
Year: 1884

page_text: We, GEORGE ALBERT CRAVEN, Manager, JOHN CRABTREE, and WILLIAM CLAYTON,
Managing Overlookers, all of Dalton Mills, Keighley, in the County of York,
do hereby declare the nature of our Invention for IMPROVEMENTS IN TWISTING
MACHINERY, to be as follows:— ·
This invention relates to certain improvements in that class of twisting machines
in which vertical trap rollers are used, and has for its object the combination and
arrangement of certain parts in order to render it unnecessary to stop the bobbins
with the operators knce as is now the cominon practice with machines of this class
whilst piecing up broken ends; to obtain a more uniform twist and run the bobbins
at an increased speed thereby manipulating more weight of fibre in a given time,
which we accomplish in the following manner :-
The vertical trap rollers are mounted and actuated as in ordinary machines, but
the rollers are stopped in a different manner, and in addition we have a series of
trap motions placed between the bobbin board and the before mentioned rollers; .
one motion for each spindle fitted with a number of wire twizzles through each of
which a thread of yarn passes raising the same by the tension thereof.
When any
thread of yarn is broken or by any other cause one of the twizzles lower and come
in contact with a revolving or oscillating fan, the latter displaces the twizzle
mounting and actuates a train of levers in connection therewith, by which the
vertical trap roller is stopped and the driving band moved from the fast or driving
wharl to a loose one, thereby stopping the bobbin on the aforesaid spindle until the
twizzle mounting is replaced.
In lieu of the ordinary fly spindle and lifter rail, we introduce revolving tubes
on the spindle in combination with the ring rail and traveller, by such combination
we increase the speed of the bobbin on the spindle and therefore twist a greater
quantity of yarn in a given time.
WAUGH & CHAPMAN,
Agents for the Applicants.

page_text: We, GEORGE ALBERT CRAVEN, Manager, JOHN CRABTREE and WILLIAM CLAYTON,
Managing Overlookers, all of Dalton Mills, Keighley, in the County of York,
do hereby declare the nature of our invention, for IMPROVEMENTS IN TWISTING
MACHINERY, 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 certain improvements in that class of twisting machines
in which vertical trap rollers are used, and has for its object, the combination and
arrangement of certain parts in order to render it unnecessary to stop the bobbins
with the operator's knee, as is now the common practice with machines of this class
whilst piecing up broken ends; also to obtain a more uniform twist and run the
bobbins at an increased speed, thereby manipulating more weight of fibre in. a
given time.
The invention consists of stopping the ordinary trap rollers, by additional trap
motions mounted between the said rollers and the bobbin board, one motion for
_each_spindle, and_each_fitted with a number of wire twizzles which are raised clear
of a revolving fan by the tension of the yarn. When the yarn is run off from any
of the supply bobbins, or is broken, the respective twizzle lowers, and the wing of
n revolving fan coming in contact therewith, displaces the twizzle mounting and
liberates a train of levers in connection therewith; by which the vertical trap roller
is stopped, and the driving band moved from the fast or driving wharl to a loose
one; thereby stopping the bobbin, and minimising the production of hard twisted
yarn.
In lieu of the ordinary fly spindle and lifter rail, we introduce revolving tubes
on the spindle in combination with the ring rail and traveller, by which we increase
the speed of the bobbin and therefore twist a greater quantity of yarn in a given
time.
We will now describe our invention more in detail, by aid of the accompanying
drawings; in which Fig. 1 represents a sectional end elevation of such portions of
a twisting frame as are required to explain our invention. Fig. 2 is an enlarged
detail of our improved trap motion; Fig. 3 is a front view of the twizzle carrier;
Fig. 4 a side elevation of the twizzle carrier bracket, and Fig 5 a side elevation of
the catch bar; in all the figures similar letters represent similar parts.
The frame end is indicated by the letter A, and mounted to the longitudinal
beams and bars are the vertical trap rollers B, and the balanced lever guides G,
which are of the ordinary construction mounted and actuated in the usual manner.
Each thread of yarn from the supply bobbins D, passes through the eye of one of
the twizzles E; and from the twizzles two or more tlireads are conducted through
the respective guides F where they are combined, after which the combined threads
pass around the revolving vertical trap rollers B, through the balanced trap lever
eyes G to the bobbins on the spindles S; the threads of yarn being twisted
together after leaving the trap rollers B. So far all the parts described are
ordinary, except the twizzles E, which are placed in the slots of frames H; one
frame to each spindle, and are mounted in suitable journals in brackets J. As
before mentioned, the tension of the yarn holds the twizzles up clear of the wings
of the revolving fan K, but when the yarn is finished from any of the supply
bobbins D, or is broken; the respective twizzle desceuds to the position shewn at E¹,
when the wing of the fan K will come in contact with the same, and cause the
bottom portion of the frame H to move in the direction of the arrow (see Fig. 2.);
at the same time raising the catch bar L clear of the indentation at L', and moving

page_text: the catch bar in the same direction as the arrow such a distance that on the fan
wing K coming in contact with the catch bar projection L', it is carried further
forward in the same direction towards the front of the frame; until the end of
arm M which is attached to lever N, comes in contact with the ordinary pin on the
driving pulley P of the vertical trap roller; thereby stopping the same independent
of the ordinary balanced lever.
In order to stop the bobbin on the spindle when any of the threads of yarn
break, we form the end of lever R at R with a slot, through which the leading
portion of the driving band passes, the bobbins and tubes on the spindles being
driven by the bands T from the pullies P¹, and when the catch bar L is operated
upon in the manner as before described, the lever R is free, and the weight W
causes the end of lever to descend and move the driving band from the fast wharl T¹
to the loose wharl T, thus stopping the tube and bobbin thereon, at the same time
as the vertical trap roller is stopped, and will remain so until the catch bar is put
back into its original position, as shewn by Fig. 2; thus giving the operator an
opportunity of piecing up the broken thread or threads of yarn, without having
occasion to stop the tube wharl by the knee.
In lieu of the ordinary fly spindles or caps, and lifter rail, we use revolving
tubes similar to those used by.cap frames in combination with the ring rail Y and
traveller, which are operated in the same manner as in ring spinning frames, and
by which we are enabled to increase the speed of the bobbin and therefore twist a
greater quantity of yarn in a given time than can be accomplished by the use of
fly spindles; and by dispensing with caps greater facility is given to the "doffing'
operation, the head of tho spindles being free, unincumbered by the caps, as is the
case with cap twisting frames.
"
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:
The stopping of the vertical trap rollers B by the arm M actuated substantially
in the manner described, and as illustrated by the accompanying drawings.
The combination of the twizzles E with the catch bars L, levers N and R, all
arranged substantially in the manner and for the purpose as hereinbefore described,
and as illustrated by the accompanying drawings,
'Dated this 2nd day of January 1885
WAUGH & CHAPMAN,
Agents for the Applicants.