IMPROVED AUTOMATIC SELF-STRIPPING MOTION FOR DIRT OR OTHER ROLLERS IN CARDING ENGINES."
Year: 1875

page_text: LETTERS PATENT to Thomas Rawsthorne, of Preston, in the County
of Lancaster, Cotton Spinner, and William Monk, of the same
Place, Cotton Spinner, for the Invention of "IMPROVED AUTOMATIC
SELF-STRIPPING MOTION FOR DIRT OR OTHER ROLLERS IN CARDING ENGINES."
PROVISIONAL SPECIFICATION left by the said Thomas Rawsthorne
and William Monk at the Office of the Commissioners of Patents,
with their Petition, on the 5th February 1875.
We, THOMAS RAWSTHORNE, of Preston, in the County of Lancaster,
Cotton Spinner, and WILLIAM MONK, of the same Place, Cotton Spinner,
do hereby declare the nature of the said Invention for "IMPROVED
AUTOMATIC SELF-STRIPPING MOTION FOR DIRT OR OTHER ROLLERS IN CARDING
ENGINES," to be as follows:-
On the frame sides and near the ends of the rollers we desire to strip
we fix brackets to carry a stripping comb or its equivalent imediatly
over the centre of the said roller. This stripping comb or equivalent we

page_text: drive from any convenient shaft near. The card casing imediatly over
the roller we make movable and hinged to the other part. To each end of
this part of the casing we fix a crank, lever, and rod, or any suitable
motion for automaticaly lifting such casing. On the ends of the shaft
on which the comb or its equivalent is fixed we connect other automatic
apparatus, which on the rising of the aforesaid casing brings down the
comb or its equivalent on to the roller to be stripped, at the same time
setting such comb or other equivalent in motion stripping. Connected
with and fixed in a suitable position is a trough into which the stripper
throws the dirt and motes. When the roller is stripped (which will be
known by the attendant, and the apparatus will be so timed), such
apparatus is made to retire out of the way, the casing to fall into its
place, and the carding go on successfully until the roller is again full of
dirt, which time will likewise be set by the attendant, the mechanism
being so arranged that the time for each operation may be varied.
If the operation of stripping is performed before the roller is full of
dirt, at each time a great quantity of good cotton fibre is wasted and
passed away with the dirt, and if left too long the dirt passes on into the
carded cotton; and if again the cover is lifted altogether for stripping
while the carding is going on (which is customary), then a great amount
of air passes through, which is an acknowledged evil. But if the thing
can be done automaticaly and at the proper time without admitting air
better work is produced and a very great saving is effected.
The greatest advantage obtained by this Invention is that the stripping
motion ceases working during the filling of the roller with dirt, thereby
allowing all the long fibre to pass on without any waste of such.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
9
filed by the said Thomas Rawsthorne and William Monk in the
Great Seal Patent Office on the 4th August 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, wе, THOMAS
RAWSTHORNE, of Preston, in the County of Lancaster, Cotton Spinner,
and WILLIAM MONK, of the same Place, Cotton Spinner, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fifth day of February, in the

page_text: .
year of our Lord One thousand eight hundred and seventy-five, in the
thirty-seventh year of Her reign, did, for Herself, Her heirs, and suc-
cessors, give and grant unto us, the said Thomas Rawsthorne and
William Monk, Her special licence that we, the said Thomas Rawsthorne,
5 and William Monk, our executors, administrators, and assigns, or such
others as we, the said Thomas Rawsthorne and William Monk, our
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 "IMPROVED
AUTOMATIC SELF-STRIPPING MOTION FOR DIRT OR OTHER ROLLERS IN CARDING
ENGINES," upon the condition (amongst others) that we, the said Thomas
Rawsthorne and William Monk, our executors or administrators, by an
instrument in writing under our, 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 we, the said Thomas Rawsthorne and William
Monk, do hereby declare the nature of our said 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 the stripping of carding engine rollers, more
especially the dirt rollers, and will be understood by reference to the
accompanying Drawing and letters marked thereon.
A to dotted lines represent the end of a dirt roller worked over the
feed rollers of an ordinary carding engine; B, stripping comb shaft
which by preference we fix in this position, although we do in some
cases fix it by brackets over the centre of the roller; O is stripping
comb; D, crank lever fixed on the end of comb shaft B; E is a bowl
running freely on a pivot inside lever D; F is a cross-shaped cam
elevating the arm end of lever D four times at every revolution of
cam F; this may be driven by band or other equivalent from doffer end
or any other convenient part of the engine; H is a pendent rod or bar
secured firmly to lover D at I; J is a bowl freely working at the end of

page_text: same. It is shown resting in a space cut in a pulley K, to the side of
which is fixed a toothed wheel represented by line L working into and
driven from wheel M on the end of feed roller shaft; N is a small shaft
placed above comb shaft B, to which a surface motion is given equal to
the surface motion of the roller. This shaft takes up the stripping off the
roller as the comb clears it. O, o, is a trough placed so as to receive
the loose dirt and strippings. When the roller is stripped the small
shaft N may be lifted out and the dirty stripping drawn off from one
end.
Having described the several parts of our Invention and their purposes,
we will now proceed to describe its action and effect:-When the roller A
wants stripping the space cut pulley K is so timed in its motion that
the space part comes round, when the bowl end of pendent lever falls
into such space, bringing down a, end of D lever, which during the one
revolution of roller A, the bowl end of lever D rises and falls with the
shape of cam F, giving thereby action to stripping comb C, thus combing
roller A. During one revolution of such roller the spaced pulley K
C ontinues to travel, and by the time it has travelled the distance of the
space, the above-named roller being cleanly stripped, the bowl end of
pendent lever H will be then lifted on to the surface marked 6 which
keeps the a end of D lever up and out of the reach of cross cam F,
thereby removing the comb out of the way of roller A until the space P
comes round again, which will be timed by gearing to any period. To
the S end of pendent lever H we fix (when desired) a further lever
made of any convenient form and size, that by the falling of J end of
pendent lever H the lower part of the cover over roller A is lifted and
falls back into its place when the roller is stripped.
Having now fully described our Invention, and the way in which we
work it, we wish it to be distinctly understood that we do not confine
ourselves to the precise details we have had occasion to describe and
refer to, as many variations may be made therein without deviating
from the principle or main features of this our Invention; but what we
claim as secured to us herein is,―
First. The spaced pulley K for lifting out of gear the stripping comb
and method of keeping it there until such time it is wanted, substantialy
as and for the purposes herein-before set forth.
Second. The lever D which works the comb at its proper time, sub-
stantialy as and for the purposes herein-before set forth.

page_text: Third. The cross cam F for giving motion to stripper, substantialy
as and for the purposes herein-before set forth.
Fourth. The pendent lever connected to the lever D for throwing and
keeping out of gear the comb and levers when not required to work,
substantialy as and for the purposes herein-before set forth.
Fifth, and last. The general arrangements of the various parts herein-
before named, the purpose of stripping automatically, and to cease
working when not required, substantialy as and for the purposes herein.
before set forth.
In witness whereof, we, the said Thomas Rawsthorne and William
Monk, have hereunto set our hands and seals, this Thirtieth day
of July, in the year of our Lord One thousand eight hundred and
seventy-five.
0
THOMAS RAWSTHORNE. (L.S.)
WILLIAM MONK.
(L.S.)
Witness,
JOHN LEWIS,
Engineer & Patent Agent,
Preston,
Lancashire.