IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR DOUBLING AND TWISTING YARN."
Year: 1878

page_text: LETTERS PATENT to Prince Smith, the younger, of Burlington Shed, Keighley,
in the County of York, and Smith Ambler, also of Keighley, aforesaid, Draughts-
man, for the Invention of "IMPROVEMENTS IN THE METHOD OF AND APPARATUS
FOR DOUBLING AND TWISTING YARN."
PROVISIONAL SPECIFICATION left by the said Prince Smith and Smith
Ambler at the Office of the Commissioners of Patents on the 22nd June
1878.
PRINCE SMITH, the younger, of Burlington Shed, Keighley, in the County of
"IMPROVE-
York, and SMITH AMBLER, also of Keighley, aforesaid, Draughtsman.
MENTS IN THE METHOD OF AND APPARATUS FOR DOUBLING AND TWISTING YARN."
The object of this Invention is to construct a trap for doubling and twisting two
or more threads of yarn, which shall effectually prevent any single thread from
running to the spindle.
We accomplish the above object in the following manner :-The bobbins are put
on to the pegs of the creel, and the ends passed through the guides in the ordinary
manner; these guides are, whilst running, in such position as to allow the yarn to
pass forward to the spindle, but in the event of a thread breaking or running off any
of the bobbins, the guide or guides will fall, and come in contact with a bar having
the motion of a segment of a circle; this bar lifts up a lever with one or more jaws;
such jaws come in contact with other jaws, thus gripping the yarn, and effectually
preventing the other thread or threads of yarn from passing forward to the spindle,
thus forming a trap behind the front rollers.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Prince Smith and Smith Ambler in the Great Seal Patent Office on
the 21st December 1878.
PRINCE SMITH, the younger, of Burlington Shed, Keighley, in the County of
York, and SMITH AMBLER, also of Keighley, aforesaid, Draughtsman. "IMPROVE-
MENTS IN THE METHOD OF AND APPARATUS FOR DOUBLING AND TWISTING YARN."
The object of this Invention is to construct a trap in machines used for doubling
and twisting two or more threads of yarn, which shall effectually prevent any single
thread from running to the spindle.
We accomplish our object in the following manner:-The bobbins containing the
yarn to be twisted are put on the pegs of the creel, and the threads of yarn are
passed through separate drop guide pins that are fitted in recesses formed in a lever,
and then passed through the ordinary guide to the bobbin on the spindle; these
drop guide pins are, whilst running, in such a position as to allow the yarn to pass
forward to the spindle, but in the event of a thread breaking or the yarn being
exhausted from any of the bobbins on the creel, the drop guide pin through which
the broken or exhausted thread should pass will fall, and the bottoin end of such
drop guide pin will come in contact with a bar or tongue which has an oscillating
motion, or, in other words, moves in the segment of a circle.
When the bar or tongue comes in contact with any of the drop guide pins, the
trap lever in connection therewith is raised; each of these trap levers is fitted with
a jaw, through which the threads of yarn pass in the travel to the spindle.
When any of the trap levers are raised, as described, the yarn is gripped between
the before-mentioned jaw and another jaw that is secured to the top roller casting,
and thus the other thread or threads of yarn is or are trapped behind the front
rollers, and effectually prevented from passing forward to the spindle.
Such being the nature and object of this our Invention, we will now proceed to
describe the same in detail, and in order that the same may be fully understood wo
have hereunto annexed one Sheet of Drawings to be hercaftor referred to, and have
marked the same with letters of reference.
Figure 1 is a cross section through such portion of a doubling frame as is required
to ellucidate our Invention; Figure 2 is a front view of the same.
Similar letters are used in the Figures to represent similar parts.
The framework of the apparatus is indicated by the letter A; the bobbins B are
placed on the ordinary creel pegs, and each thread of yarn C from the said bobbius
is conducted through separate drop guide pins D, which are fitted in the guide pin
lever E, which is centred on a pin at E. The threads of yarn after passing through
the drop guide pins pass through the ordinary guide pegs F, then between the
gripping jaws G and G¹, and between the rollers H and H to the bobbin J on the
spindle K.
The tension of the threads of yarn C between the said rollers and the bobbins on
the creel lift up the drop guide pins D, and keep the bottom of the loop D¹ tight
against a pin that passes through the lever E and the loops D', and thus allow the
tongues L to work clear of the drop guide pins; these tongues have an oscillating
motion, which is obtained by means of an eccentric M fixed on a revolving intor-
mediate shaft; this eccentric is connected by means of rod M' to the lever N,
which is secured on shaft N¹ which extends the length of the machine; on this
shaft are fitted a number of levers O, on which is secured bar P, to which is fitted
opposite to each series of drop guide pins D a jointed tongue L.
In the event of any thread of yarn from the bobbins B being broken or exhausted,
the drop guide pin D, through which the broken or exhausted thread should pass,
will drop through a hole forined in the end of trap lever Q at R, and the tongue L
that is opposite to the series of drop guide pins where the yarn is broken or
exhausted will press against the portion of the drop guide pin that is through the
lever at R, and cause the trap lever Q, which is centred at Q, to rise the end Ŕ' and

page_text: grip the yarn between the jaws G and G', and thus prevent the yarn from passing
to the bobbin J on the spindle K.
When the trap lever Qis acuated, as before described, the drop guide pin lever is
also actuated, and the catch E', which forms part of lever E, falls and hooks hold
of the end of trap lever at R, and thus secures and holds the levers and yarn in
position until liberated by the attendant.
Having thus described our Invention, and the manner in which the same is or
may be carried into effect, we have to state that we do not confine ourselves to the
precise details herein described and delinated, as the same may be modified without
departing from the characteristic nature of our Invention; but that what we believe
to be new and original, and claim as the Invention secured to us by the heroin-before
in part recited Letters Patent is, the arrangement and combination of the various
parts of the apparatus for trapping the yarn behind the front rollers, substantially
as before described, and illustrated by the accompanying Drawings.
In witness whereof, I, the said Prince Smith, for and on behalf of inyself and
the said Smith Ambler, have hereunto set my hand and seal, this Nineteenth
day of December, in the year of our Lord One thousand eight hundred and
seventy-eight.
0 Witness,
JOHN WAUGH,
Engineer & Patent Agent,
Bradford,
Yorks.
PRINCE SMITH, JUN³. (L.S.)