IMPROVEMENTS IN SAW TEETH FOR CARDING ENGINES
Year: 1874

page_text: LETTERS PATENT to Louis Miroude-Pichard, of Rouen (France), Manu-
facturer, for the Invention of "IMPROVEMENTS IN SAW TEETH FOR
CARDING ENGINES."
Sealed the 10th July 1874, and dated the 2nd February 1874.
PROVISIONAL SPECIFICATION left by the said Louis Miroude-
Pichard at the Office of the Commissioners of Patents, with his
Petition, on the 2nd February 1874.
I, LOUIS MIROUDE-PICHARD, of Rouen (France) Manufacturer, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
Saw Teeth for CARDING ENGINES," to be as follows :—.
My Invention consists essentially in the manufacture of saw teeth for
cards formed with an inclined notch immediately below the points of
the teeth. This inclined notch, which is so formed as to commence
from the point of the tooth during the process of the manufacture itself,
effectually obviates the inconveniences arising from the teeth with
inclined bases which are produced with the tool called the "twining

page_text: cone
(doubloir-cone).
тие тепианов Wien го по
to obtain by this tool disappears when the plate or the ribbon of the
cards is applied upon the cylinder, because the tension causes the teeth
to straighten..
With my system of teeth with inclined notches made below the point
the inclination is maintained, and does not change whatever may be
the tension at the folding of the plates or card ribbons upon the cylinder
or drum.
I proceed, with reference to the accompanying Drawings, to explain
a specimen of my new saw tooth with inclined notch.
Figures 1 and 2 show a finished saw tooth; they are obtained by the
lever (balancier) or the twiner (doubloir) in a flattened metallic thread
or metallic band a. The essential peculiarity of this tooth consists in
an inclined notch 6, 6, formed at the same time as the tooth towards
each of its ends.
Figures 3, 4, and 5 show different views of the saw tooth folded.
At Figure 3 is shown how the notch 6 of the tooth is presented.
Figure 6 shows the saw teeth with inclined notches fixed into the
plate or the ribbon of the card h; Figure 6 bis, an clevation; and
Figure 7, a view of the under side of a card ribbon with the finer
saw teeth fixed therein, but always with the same system of inclined
notch.
Whatever may be the dimensions of my saw teeth with notches
inclined below the point, they invariably preserve their inclination
when the plates or ribbons are mounted upon the cylinders or
rollers.
I can manufacture these teeth either mechanically or by the hand,
and I may form the inclined notch below the point before or after the
folding of the tooth. I use iron, steel, or other tempered metal for their
manufacture, cemented, galvanized, or tinned. I fix the saw tooth upon
all kinds of simple or combined materials, upon plates, ribbons, leather,
or upon fabrics alone or combined with caoutchouc, leather, or glue.
I may apply them upon bands of metal or wood, and I can appropriate
them to work of all kinds upon filamentous materials.

page_text: filed by the said Louis Miroude-Pichard in the Great Seal Patent
Office on the 1st August 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, LOUIS
MIROUDE-PICHARD, of Rouen, France, Manufacturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Second day of February, in the year of our
Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Louis Miroude-Pichard, Her special
licence that I, the said Louis Miroude-Pichard, my executors,
administrators, and assigns, or such others as I, the said Louis
Miroude-Pichard, 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, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention
for "IMPROVEMENTS IN SAW TEETH FOR CARDING ENGINES," upon the
condition (amongst others) that I, the said Louis Miroude-Pichard,
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 imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Louis Miroude-Pichard, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in
and by the following statement thereof, that is to say :-
-
My Invention consists essentially in the manufacture of saw teeth for
cards formed with an inclined notch immediately below the points of the
teeth. This inclined notch, which is so formed as to commence from
the point of the tooth during the process of the manufacture itself,
effectually obviates the inconvenience arising from the teeth with
inclined bases which are produced with the tool called the " twining

page_text: "
conc (doubloir-cone). The inclination which it has been endeavoured
to obtain by this tool disappears when the plate or the ribbon of the
cards is applied upon the cylinder, because the tension causes the teeth
to straighten.
With my system of teeth with inclined notches made below the point
the inclination is maintained, and does not change whatever may be
the tension at the folding of the plates or card ribbons upon the cylinder
or drum.
I proceed, with reference to the accompanying Drawings, to explain
specimens of my new saw tooth with inclined notches.
Figures 1 and 2 show a finished saw tooth as obtained by the lever
(balancier) or the punch (decoupoir) from a flattened metallic thread
or band a. The essential peculiarity of this tooth consists in an inclined
notch b, b, formed at the same time as the tooth towards each of its
ends.
Figures 3, 4, and 5 show different views of the saw tooth folded,
and Figure 3 also shows how the notch 6 of the tooth is presented when
at work.
Figure 6 shows the saw teeth with inclined notches fixed into the
plate or the ribbon of the card h. This kind of card tooth is 2
capable of several variations. Thus Figure 7 shows a card tooth a, in
which the notch b' is straight with its back 6 parallel. In Figure 8 the
inclined notch b is also straight, but the back b¹ slopes to the point of
the tooth.
In Figure 9 the notch 6 is curved and concave and the back b¹ is 2
similar to that shown in Figure 7.
Figure 10 shews a tooth a with a concave notch b, but the back 6¹
slopes directly to the point of the tooth.
Figures 11 and 12 show two forms of tooth in which an inclined
plane b¹, b, replaces the notch.
In Figure 13 the notch bis concave, and its back b¹ is a concave
curve.
Figures 14, 15, 16, and 17 show the same kind of tooth with inclined
notch, but with two points b, b, for the same tooth.
a

page_text: Figures 18, 19, 20, and 21 show the same tooth with inclined notch,
but with three points b, b, b, for the same tooth.
The same kind of saw tooth for cards with inclined notch can also be
arranged as shown in Figures 22, 23, 24, and 25.
The complete view, Figure 22, shows the oblique parts b, b, consti-
tuting the inclined grooving of the teeth a, but a claw c is left in order
to give a firmer seat to the tooth upon the card ribbon h into which the
teeth are fastened. This arrangement will advantageously replace the
card saw teeth called "English," that is to say, with continuous blades
indented in their length, and with these continuous blades fixed into the
circular grooves or slits of the card cylinders.
If one of my independent teeth happens to deterioriate or break I can
replace it singly, whilst if anything happens to one of the teeth of the
English continuous card ribbons or bands it is necessary to replace it
entirely.
The specimens above given are the variations of my system of inclined
notch.
Whatever may be the dimensions of my saw teeth with notches
inclined below the point, they invariably preserve their inclination when
the plates or ribbons are mounted upon the cylinders or rollers.
I can manufacture these teeth either mechanically or by the hand, and
I may form the inclined notch below the point before or after the folding
of the tooth. I use iron, steel, or other tempered metal for their manu-
facture, cemented, galvanized, or tinned. I fix the saw teeth upon all
kinds of simple or combined materials, either as plates or ribbons, upon
leather or upon fabrics alone, or combined with caoutchouc, leather, or
glue. I may apply them upon bands of metal or wood, and I can
appropriate them to work of all kinds upon filamentous materials.
And having now described the nature of my said Invention, and in
what manner the same is to be performed, I declare that I claim, the
manufacture and employment of the new kind of saw teeth for the
bands or drums of carding engines, such saw teeth being formed with an
inclined notch, whether straight or curved, beneath the point in order
that their inclination may be preserved notwithstanding the variable

page_text: tension upon the card plates or ribbons, as herein-before described, and
as shown in the Drawings hereunto annexed.
In witness whereof, I, the said Louis Miroude-Pichard, have
hereunto set my hand and seal, this Twenty-sixth day of June,
One thousand eight hundred and seventy-four.
LOUIS MIROUDE-PICHARD. (L.S.)
Witness,
ALBERT CAHEN,
Civil Engineer,
of Boulevard Magenta, No. 32,
at Paris.