IMPROVEMENTS IN THE MANU- FACTURE OF WOVEN FABRICS BY MEANS OF LACE MACHINERY."
Year: 1852

page_text: LETTERS PATENT to Samuel Marsh, of Mansfield, in the County
of Nottingham, for the Invention of "IMPROVEMENTS IN THE MANU-
FACTURE OF WOVEN FABRICS BY MEANS OF LACE MACHINERY."
PROVISIONAL SPECIFICATION left by the said Samuel Marsh at
the Office of the Commissioners of Patents, with his Petition, on
the 21st October 1852.
I, SAMUEL MARSH, of Mansfield, in the County of Nottingham, do
hereby declare the nature of the said Invention for." IMPROVEMENTS IN
THE MANUFACTURE. OF WOVEN FABRICS BY MEANS OF LACE MACHINERY" to
be as follows:-
The first part of my Invention consists in having attached to the
inside surface of the front and back comb bars of a twist net machine,
just beneath the combs, two pieces of iron, so rivetted together that
when they are screwed on to the surface of the comb bars they form
an open groove, and which groove I call the weft slide groove. Half

page_text: an inch above the slide groove is fixed another light bar of iron of
sufficient thickness to project to the same level as the slide groove, an
open space being left towards the warp threads, which are placed
either in guide bars in the centre of the back and front comb bars, or
in a stump bar in connection with brass bars.
Secondly, a slide is made about three inches long, and of sufficient
thickness to work freely in the slide groove, and at each end of the
slide is rivetted a stud to project over the slide groove about half an
inch. Between the two studs a small slot is made to receive a guide
made of steel, and a hole is drilled through the centre of the guide for
the thread or threads to pass easily through; likewise the guide is made
of sufficient length to carry the thread above the carriages on to the
points when the point bar is at its lowest fall, so that the points are not
prevented in their action from having a good and clear division of the
warp and bobbin threads.
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Thirdly, there is placed a bar of iron running parallel with the bottom
edge of the comb bar, on which is fixed levers to strike the weft slide
when the machine is at its greatest width with the carriages, either in
the back or front motion; the striking levers are connected to two
other levers working from a jacquard at the end of the machine, both
motions being obtained from one cam by having two levers, viz, one at
each side of the cam, with strong springs on them to make them
follow the cam, according to its form. The levers are so arranged that
when they are working on the turned surface of the cams the slide is
at its extremity, and the machine is at its widest width; the lever is
made to fall by having a piece cut out of the cam at right angles with
the lever, and in consequence of the strong spring it strikes the pro-
jecting stud on the slide, and sends the slide weft to its opposite
extremity. Both the levers can be thrown out of action by having two
small slides connected by strings to the top jacquard; the warp threads
would be acted upon in the ordinary way of lace machines to twist
round one or two bobbin threads, according to the article to he
produced.
Note. The weft or thread thrown, instead of being connected with
the slide weft as in weaving, is wound on to a large taper lobbin;
•

page_text: the bobbin is placed on the floor, and the thread passes through a
guide fixed about 12 inches over it, and then passes through two
pieces of hare skin to keep the thread from becoming slack.
Fourthly, it would be required, when making a strong durable
article, to have two warp threads to each carriage, one thread shogging
to the right, whilst the other thread shogs to the left, and instead of
having only one thread in the bobbin, as is usual in the bobbin net
machine, it would make a closer texture to have two threads wound on
one bobbin, one thread to be threaded through one side of the eye of
the carriage, and the other thread through the opposite side.
Fifthly, to make figured or embossed goods I should employ a certain
number of guide bars of the ordinary kind, and have the different
colours wound on to beams, and from thence threaded through the
guides; and by a method peculiar to the plan, after the coloured or
embossing threads have done their work, by a proper working of the
threads they will be carried to the back side of the material, and thus
the design will have a distinct and highly embossed appearance. To
make a level figured surface the stump bar would be used in connection
with the ordinary brass or steel bars. To make the pattern the thread
would simply have to shog two gates with sufficient weight on the warp
to pull the silk or cotton off the bobbins; the bobbin thread would
then lie on the back of the article produced, leaving a plain figured
surface.