Improvements in Feed Roller Mechanism for Winding, Doubling, Twisting, and Analogous Machines.
Year: 1889

page_text: Date of Application, 15th Mar., 1889
Complete Specification Left, 14th Dec., 1889-Accepted, 18th Jan., 1890
PROVISIONAL SPECIFICATION.
Improvements in Feed Roller Mechanism for Winding, Doubling,
Twisting, and Analogous Machines.
I, JOHN BOYD, of Shettleston Iron Works, Glasgow, in the County of Lanark,
North Britain, Engineer, do hereby declare the nature of this Invention to be as
follows, that is to say :-
My said Invention comprises improvements designed to be applied to winding,
doubling, and twisting machines of the kinds described in my Patent Specifications
No. 4241 of 1877, and No. 2619 of 1883, but which can also be advantageously
adapted to various other kinds of automatic twisting frames, and also to some
other kinds of twisting frames.
My improved mechanism is very suitable for working with heavy yarns as with it a
very powerful grip is obtained; it may, however, also be proportioned or adjusted to
suit yarns requiring a light or moderate grip.
In carrying out my present Invention the driven feed roller is carried above the
centre of the driving roller, and when working is pressed against its upper front side
by a lever holding it, this lever being centred above the driving roller, and being
made with a long elastic arms extending inwards and having its inner end attached to
a rod extending down to the stop-motion mechanism below.. The lever arm may be
more or less rigid a spring being applied on the rod or otherwise to give the desired
elasticity. When the parts are, by means of the setting-on lever, placed in positions
for working the rod referred to presses up the inner end of the lever carrying the
driven roller in a manner to strain the spring arm and thereby put pressure on the
driven roller. The threads or strands pass from the detectors up to the feed rollers,
then between them and round over the top of the upper driven feed roller, descending
from its front to the flyer. They are in contact with the driving feed roller a littlo
before reaching the nipping point; and just before reaching the roller they pass
through guides to which a slow traverse motion may be imparted to equalise the
wear on the rollers. The driven roller is by preference made with a flange on one
side. In this arrangement the strains of the threads or strands going up to the feed
rollers and down from them to the flyer tond to keep the upper driven feed roller in
contact with the driving roller; whereas in some earlier arrangements the same
straius tended to separate the feed rollers as the movable driven one was below the
driving one. The weight of the driven roller itself also assists the gripping action
in the new arrangement instead of acting oppositely.
Dated this Fourteenth day of March 1889.
EDMUND HUNT,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Feed Roller Mechanism for Winding, Doubling,
Twisting, and Analogous Machines.
I, JOHN BOYD, of Shettleston Iron Works, Glasgow, in the County of Lanark,
North Britain, Engineer, 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, that is to say :-
My said Invention comprises improvements designed to be applied to winding,
doubling, and twisting machines of the kinds described in my Patent Specifications
No. 4241 of 1877 and No. 2619 of 1883, but which can also be advantageously

page_text: adapted to various other kinds of automatic twisting frames and also to some other
kinds of twisting frames.
My improved mechanism is very suitable for working with heavy yarns as with it
a very powerful grip is obtainable, it may, however also be proportioned or adjusted to
suit yarns requiring a light or moderate grip.
In carrying out my Invention the driven feed roller is carried above the centre of
the driving roller, and when working is pressed against its upper front side by a lever
holding it, this lever being centered above the driving roller, and being made with a
long elastic or spring arm extending inwards, and having its innor end attached to
a rod extending down to the stop-motion mechanism below. The lever arm may be
more or less rigid, a spring being applied on the rod or otherwise, if necessary, to give
the desired elasticity.
On an accompanying sheet of explanatory drawings, figure, 1, is a transverse vertical
section of a doubling and twisting frame as provided with my improved feed roller
mechanism; and figures, 2, and 3, are separate enlarged views of that mechanism,
being respectively a plan and a vertical section. In these drawings the same
reference numerals are used to mark the same or like parts wherever they are
repeated.
In the machine shown in figure, 1, the threads or strands pass from bobbins, 4, to
detectors, 5, and thence up to feed rollers, 6, 7, next between the feed rollers and round
and over the top of the upper driven feed roller, 7, descending from its front to the
flyer, 8. They are in contact with the lower driving feed roller, 6, a little before
reaching the nipping point; and just before reaching the roller they pass through
guides, 9, to which a slow traverse motion may be imparted in any convenient
known way to equalise the wear on the rollers.
The lower driving feed rollers, 6, are on a suitably driven shaft, 10, carried by
brackets bolted to a longitudinal upper frame rail, 11, of the machine. Each upper
feed roller, 7, which is by preference made with a flange on one side is carried by an
arm, 12, forming the front part of a lever which is centered on a bracket bolted to the
frame rail, 11. The lever is made with a long clastic or spring arm, 14, extending
inwards and having its inner end adjustably attached to the upper end of a
rod, 15, extending down to any convenient part such as, 16, of the stop-motion
mechanism. When the parts are by means of the setting-on lever, 17, placed in
positions for working, as shown at the right-hand side of figure, 1, the rod, 15, presses
up the inner arm, 14, of the lever carrying the driven roller, 7, in a manner to strain
the arm, and thereby put pressure on the driven roller. At the left-hand side of
figure, 1, the feed roller details and other parts are shown in the positions assumed
when a thread or strand has broken or failed and the stop-motion mechanism has
acted. When the lover arm, 14, is not sufficiently elastic a helical spring, 18, is
placed on that rod so as to bear up against the lever arm, as shown at the right-hand
side of figure, 1, or a spring may be applied to the rod, 15, or to the lever arm, 14,
in any other convenient way.
In my improved arrangement of feed-roller mechanism hereinbefore described, the
strains of the threads or strands going up to the feed rollers, 6, 7, and down from
them to the flyer, 8, tend to keep the upper driven feed roller, 7, in contact with tho
driving roller, 6; whereas in some earlier arrangements the same strains tended to
separate the food rollers, as the movable driven one was below the driving one. The
weight of the driven roller, 7, itself also assists the gripping action in the new arrange-
ment instead of acting oppositely. These differences and advantages are in addition
to the considerable surface contact of the threads or strands due to the manner in
which they are led partly round the feed rollers, and to the powerful pressure which
can be brought to bear on the driven roller, 7, by means of the elastic arm, 14, of the
lever holding it.
My present improvements are obviously applicable to various machines having
stop-motion and other parts more or less different from what is shown in figure, 1,
of the accompanying drawings. The height of the feed rollers above the spinning or
twisting mechanism may be varied in different cases; and in cases in which automatic

page_text: stop-motion mechanism is not used the lever, 12, 14, holding the upper driven feed
roller, 7, may be connected to a lever or other part arranged to be moved by hand
for stopping and restarting the action, such part being retained by a catch arranged
so as to cause the feed-roller lever to be suitably strained when in the working
position. Or the feed-roller lever, made of any suitable form, may itself be arranged
to be engaged by hand on a catch. As hereinbefore stated the feed-roller lever may
be proportioned or adjusted to suit yarns requiring a light or moderate grip; and if
in any case the weight of the upper roller gives more pressure than is desired the
feed-roller arm, 14, may be adjusted relatively to the parts acting on or holding it,
so as to relieve that pressure to a suitable extent.
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. In feed roller mechanism for winding, doubling, twisting, and analogous machines
the combination of the following arrangements or parts namely:-the placing of the
feed rollers relatively to the other parts of the machine so that when working the
threads or strands pass up to them and thence downwards, the arranging of
the movable driven feed roller, higher than and so as to press downwards on
the lower driving feed roller,-the causing the threads or strands to pass partly in
contact with the lower driving roller, between the rollers, and round a large part of
the upper driven roller, and the making of the feed-roller lever with a long elastic
or spring arm, or connecting it with a spring in an equivalent manner, all substantially
as hereinbefore described.
2. The feed roller lever made with a long elastic or spring arm or connected with
a spring substantially as herein before described.
Dated this Thirteenth day of December 1889.
EDMUND HUNT,
Applicant's Agent.