Improvements in Doubling and Twisting Machines.
Year: 1895

page_text: Date of Application, 16th Nov., 1895-Accepted, 28th Dec., 1895.
COMPLETE SPECIFICATION.
Improvements in Doubling and Twisting Machines.
I THOMAS HENRY SMITH of 500 East Sixth Street Jamestown, New
York U.S.A. Cotton, Manufacturer do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :--
The object of my invention is to make a simple and cheap stop attachment for
twisting machines, and one so arranged that whenever the thread that is being
twisted breaks, the upper roll is stopped, the thread being held in position until it
is taken up to be, tied, and when this is done it is set for further use, all of which
will be readily understood by this Specification and the accompanying drawings,
in which:
Fig. 1 shows side, elevation of roller stand. with attachment in position and
thread unbroken.
Fig. 2 shows roller stand with attachment caught between the rolls, the, thread
broken and the upper roll raised so as to stop its motion.
Fig. 3 shows position of rolls.
Fig. 4 shows stop attachment.
Fig. 5 shows attachment in detail.
In the drawings, A is the bottom roll of a twisting machine, the rolls of which
run inward from the front; B, B, are short friction rolls mounted above the long
roll, having bearings so as to be independent of each other, having short journals
and resting on the bottom roll A, are driven by friction in the usual way. Fig. 4
shows my stop attachment E as being a thin metal plate made preferably of steel,
having a hole near its upper end to allow it to be readily inserted on the journal
of the upper roll B as shown in Fig. 1. This plate is turned at a right angle near
its center, the edge K being rolled over to firmly secure the wire W, to hold its
upper end, and also to hold the flexible double tongue H, S, as shown. This
flexible double tongue is preferably made of rawhido lace leather, but any strong
flexible material will do. Other methods might be employed for securing the
parts together, but the one described is found to serve a good purpose. The upper
roll is raised, the plate E is inserted on the journal through the hole as shown in
Fige. 1 and 2.
ID operating the attachment, the thread on coming off the bobbins goes over the
upper roll and back of the under roll and to a spool below (spool not shown in
drawings). The wire leg of the attachment rests lightly on the thread below the
rolls, at its lower end, holding the flexible double tongue just away from the bite
or nip of the rolls. As soon as the thread is broken the wire falls down, the
flexible tongue is caught between the rolls and drawn in far enough to stop the
upper roll, which then rests on the metal plate E, stopping instantly the delivery
of the yarn, the lower tongue only coming in contact with the lower roll which has
a continuous motion. As soon as the thread is tied up again, the wire is placed
on the thread and the twisting goes on as before.
It will be readily understood that this simple attachment saves not only the
making of waste but facilitates the tieing of the thread, since no waste is lapped
around the upper roll to be cut off, and the thread is held in position by the upper
leather tongue and runs out when the lever is litted. The top roll does not need
to be lifted out of the cap bar, thus saving time and cut threads which are
sometimes caused by putting the top roll down too heavily. All wear on twisting

page_text: machinery when stop occurs is prevented. It is instantaneous in its action. It
holds the broken thread in place until the thread is tied up.
Having fully described my invention, what I claim as
secure by Letters Patent is :-
1:
:
1.
new and desire to
...
1. A stop attachment for twisting machines, consisting of a flat metal strip
having a hole at one end to go over the journal or pin of the upper friction roll,
the lower part of the piece turned at right angles, having one edge lapped or
turned over to secure the upper end of a wire leg or lever, the 'other end of the
same being bent to rest on the thread as it is twisted, the plate also holding one
end of a flexible tongue, substantially 'as sliown and for the purpose set forth.
2. A stop attachment for twisting machines, consisting of a flat metal piece with
a hole at one end 'to go over the journal of the loosely mounted roll as shown, the
flat piece being bent or turned over at one edge to secure a 'double flexible tongue
and a wire leg'curved at its lower end to rest on the thread while being twisted,
ne shown and described.
13. A stop attachment for twisting machines, consisting of a flexible double
tongue adapted to engage the nip or bite of the twisting rolls, the tongue being
securely mounted in a metal hanger that rests on the pin or journal of the upper
roll, in combination with a metal leg secured to said hanger and curved so as not
to come in contact with the rolls, its lower end being formed to rest on the thread
being twisted, so as to hold the flexible tongue from the nip or bite of the rolls,
as shown and set forth.
i.
4. A stop attachment for twisting machines, consisting of the flat metal piece E,
mounted on the journal of the upper roll B, the wire leg or lever. W securely
fastened to this flat metal piece at one end, the other end of piece W being bent
in a suitable form to rest on the thread, in combination with a flexible tongue H, S,
securely fastened at one end by the motal piece E, and projecting beyond the
metal to take the bite of the rolls, substantially, as shown 'and for the purpose
*set forth.
Dated this 16th day of Novembár 1805
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.