AN IMPROVEMENT IN SELF-ACTING KNITTING MACHINE NEEDLES
Year: 1875

page_text: LETTERS PATENT to Charles Guillaume Roger-Durand, Manufacturer,
of Boulevard de Strasbourg, No. 23, Paris, for the Invention of
"AN IMPROVEMENT IN SELF-ACTING KNITTING MACHINE NEEDLES."
Sealed the 23rd May 1876, and dated the 26th November 1875.
PROVISIONAL SPECIFICATION left by the said Charles Guillaume
Roger-Durand at the Office of the Commissioners of Patents, with
his Petition, on the 26th November 1875.
I, CHARLES Guillaume Roger-DURAND, Manufacturer, of Boulevard
de Strasbourg, No. 23, Paris, do hereby declare the nature of the said
Invention for "AN IMPROVEMENT IN SELF-ACTING KNITTING MACHINE NEEDLES,”
to be as follows:-
-
The needle usually employed in knitting machines is formed with a
hook at its end, and under this hook is a throat or channel, in which is
mounted the pawl or tongue by means of a pin on which it turns.
This pin, consisting of a small piece of wire, is usually burred over at
its ends after insertion, but the part of the needle in which it is inscrted
.

page_text: is so delicate that this burring over forms no effective rivetting, and
consequently these pins are very apt to work themselves out of place,
whereby the tongue becomes separated from the needle, and the needle
itself is thus rendered totally ineffective. These accidents often occurring
in knitting machines occasion frequent stoppages of the whole
mechanism, and imperfections in the work produced by them. The
object of my Invention is to provide against these evils, which I do by
soldering the tongue pin into the cheeks of the needle. I prefer to
make the holes in these cheeks a little larger in diameter than the pin,
so as to leave room in them for a little thickness of the soldering metal
around the pin, and I also prefer to countersink these holes slightly, so
that the pin with the solder takes the form of a countersunk rivet on
each side of the needle, and is filed off smooth; also, instead of using
soft solder I prefer to use the hard solder or brazing material, which is
stronger and not liable to become detached from the metal surfaces
which it unites.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Charles Guillaume Roger-Durand in the Great Scal
Patent Office on the 25th May 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
GUILLAUME Roger-Durand, Manufacturer, formerly of 23, Boulevard
de Strasbourg, Paris, France, but at present of 18, Rue de la Chaussée
d'Antin, Paris, France, aforesaid, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-sixth day of November, in the a
year of our Lord One thousand eight hundred and soventy-five, in
the thirty-ninth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Charles Guillaume Roger-
Durand, Her special licence that I, the said Charles Guillaume
Roger-Durand, my executors, administrators, and assigns, or such g
others as I, the said Charles Guillaume Roger-Durand, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise,

page_text: and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention for “AN IMPROVEMENT
IN SELF-ACTING KNITTING MACHINE NEEDLES," upon the condition (amongst
others) that I, the said Charles Guillaume Roger-Durand, my executors
or administrators, by an instrument in writing under my, or their, or
one of their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was
to be performed, and cause the same to be filed in the Great Seal
Patent Office within six calendar months next and immediately after the
date of the said Letters Patent.
NOW KNOW YE, that I, the said Charles Guillaume Roger-Durand,
do hereby declare the nature of my said Invention, and in what manner
the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
The needle usually employed in knitting machines is formed with a
hook at its end, and under this hook is a throat or channel, in which is
mounted the pawl or tongue by means of a pin on which it turns.
This pin, consisting of a small piece of wire, is usually burred over at
its ends after insertion, but the part of the needle in which it is inserted
is so delicate that this burring over forms no effective rivetting, and
consequently these pins are very apt to work themselves out of place,
whereby the tongue becomes separated from the needle, and the needle
itself is thus rendered totally ineffective. These accidents often occurring
in knitting machines occasion frequent stoppages of the whole
mechanism and imperfections in the work produced by them. The
object of my Invention is to provide against these evils, which I do by
soldering the tongue pin into the cheeks of the needle. I prefer to
make the holes in these checks a little larger in diameter than the pin,
so as to leave room in them for a little thickness of the soldering metal
around the pin, and I also prefer to countersink these holes slightly, so
that the pin with the solder takes the form of a countersunk rivet on
each side of the needle, and is filed off smooth; also, instead of using
soft solder I prefor to use the hard solder or brazing material, which is
stronger and not liable to become detached from the metal surfaces
which it unites.
Having thus described my said Invention, and the manner of carrying
it into effect. I would have it understood that I do not confine myself

page_text: to the means above indicated for fixing the tongue pin, for what I claim
and desire to secure by the said Royal Letters Patent is, to fix firmly,
whatever may be the means employed, the tongue pin of the self-acting
knitting machine needle in the cheeks of the said needle, so that it may
form one single piece with the latter, substantially as above described.
In witness whereof, I, the said Charles Guillaume Roger-Durand,
have hereto set my hand and seal, this Twenty-second day of
May, in the year of our Lord One thousand eight hundred and
seventy-six.