Improvements in Doubling and Throwing Silk and in Machinery therefor.
Year: 1890

page_text: Date of Application. 24th Oct., 1890-Accepted, 29th Nov., 1890
COMPLETE
SPECIFICATION.
Improvements in Doubling and Throwing Silk and in Machinery
therefor.
We, ARTHUR NICHOLSON and JOHN HALL, both Members of the firm of J. & J.
Brough, Nicholson and Company, of Leek, in the County of Stafford, Silk Manu-
facturers, 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 :-
Our invention relates to improvements in doubling and throwing silk and in the
machinery employed therefor, and the chief objects of our improvements are to
simplify and expedite the re-doubling and throwing operations, to simplify the
machinery, and increase its production.
In what is known as the Stannard Patent the bobbins of doubled silk are spun,
re-doubled and thrown at one operation; but to effect this a tension mechanism has
to be employed which somewhat limits the speed.
According to our invention we take each bobbin of doubled silk and put it through
a spinning mill of the old type, whereby the yarn is spun the first way and rewound
upon a bobbin, and is then ready to be taken to our improved machine, which is
illustrated by the sheet of drawings annexed.
Figure is an end elevation, Fig. 2 a front elevation and Fig. 3 a plan of our
improved machine for throwing silk, part of the machine only being shown.
In these views-a designates the frame of the machine, b the jackboard, c the
bobbins of doubled silk brought from the spinning mill, d d' the usual pair of fast
and loose pulleys for driving the machine, and e the usual roller for driving by means
of the bands e¹ the throwing spindles f.
We mount the bobbins c in groups of three upon the jackboard b, and the three
threads from a group are taken under a wire or rod g through a guide eye h and
round a tension pulley i which is preferably covered with leather or other like
material and is provided with a suitable brake appliance such as a cord and weight j;
from the pulley i the silk is led round a grooved shaft k and then on to a grooved
roller fixed on an adjoining shaft m, the shafts k and m being geared together by
the wheels marked n and driven by gearing (not shown) in such a manner that the
grooved rollers are rotated at the same surface speed as the grooved shaft k. The
silk is passed several times round the grooved shaft k and the grooved roller l,
the latter taking the place of and being in our opinion superior to the ordinary rubber
coated pulley, while the grooved shaft replaces the ordinary separate runners on a
stationary shaft. The silk after having been doubled by the grooved shaft k and
grooved roller is led to the flyer o by which it is thrown and wound upon the
throwing bobbin p.
We have shown and described three threads but we can throw two or more than
three threads on this machine.
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The improvements in throwing silk which consist in first spinning and then
rewinding each doubled bobbin in an ordinary silk spinning mill, and then doubling
and throwing each group of say three bobbins in our improved machine as described
5 or in a similar machine for the same purpose.
group
of
2. The arrangement use and application of a tension pulley i for each
bobbins c in combination with the grooved shaft k and the grooved rollers or their
respective equivalents substantially as herein set forth.

page_text: 3. The combined arrangement of parts embodying
machinery for throwing silk substantially as herein described and as illustrated
our improvements in
by the drawings annexed.
Dated this 23rd day of October 1890.
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicants.