IMPROVEMENTS IN MACHINERY OR APPARATUS TO BE EMPLOYED IN GINNING COTTON
Year: 1872

page_text: LETTERS PATENT to John Henry Johnson, of 47, Lincoln's Inn Fields,
in the County of Middlesex, Gentleman, for the Invention of
"IMPROVEMENTS IN MACHINERY OR APPARATUS TO BE EMPLOYED IN GINNING
COTTON." A communication from abroad by George Purvis, of the
City of Bombay.
Sealed the 22nd April 1873, and dated the 25th October 1872.
PROVISIONAL SPECIFICATION left by the said John Henry Johnson
at the Office of the Commissioners of Patents, with his Petition,
on the 25th October 1872.
I, JOHN HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County
of Middlesex, Gentleman, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN MACHINERY OR APPARATUS TO BE EMPLOYED
IN GINNING COTTON," a communication to me from abroad by George
Purvis, of the City of Bombay, to be as follows:-
:-
This Invention relates to an improved rotatory agitator and beaters for
cotton gins, and consists in constructing a rotatory agitator of a number
of fat teeth made of iron or other suitable metal, and of a knee shape

page_text: at the end, or with plain ends, as the case may be. These teeth are
fitted on edgeways, or rivetted on to pieces or strips of metal of about,
say, 40 inches long, more or less, as the case may be, according to
circumstances, which pieces or strips with the teeth are afterwards fixed
to a metal spindle in different rows, thus forming the set of the above
mentioned teeth at right angles, and bevelling off in opposite directions
or angles.
The spindle consists of a square body round at the ends so as to admit
pullies or drums in order to drive the same.
It may also in some cases be made of pentagon, hexagon, octagon,
or cylindrical form, so as to facilitate the attaching of a greater number
of the above-mentioned pieces or strips with teeth, as may be required,
for the purpose of ginning different varieties of kuppas or cottons of
India, or elsewhere.
One of the improved forms of beaters for cotton gins consists of an
arrangement of discs fixed on a spindle and having pieces or strips of
plates attached thereto. These plates are bent to the form of portions
or segments of a circle. They are also slotted so as to leave in them a
series of openings of the form of parallegrams, such openings being
made diagonally, or right and left diagonally, or triangularly, and may
also be made rectangularly. The said slotted plates are fitted or fixed
on to the above-mentioned discs with their openings directed right and
left, and at a certain distance apart in different rows, and in a straight
or direct line, thus forming a superficial cylinder.
The plates may be about 40 inches long, and will in some cases be
made longer or shorter in order to facilitate the manufacturing and
usage of the same.
The spindle carrying the discs is composed of a square body, and is
round at both ends to receive pullies or drums for driving them.
Another modification of beater for cotton gins comprises an arrange-
ment of knee-shaped or plain-ended knives or beaters. These knives or
beaters are fitted or rivetted edgeways at right angles on to pieces or
strips of iron of about 40 inches long, more or less, as the case may be,
according to circumstances, which pieces or strips carrying the said
knives or beaters are afterwards fixed to a square, hexagonal, or other;
flat-sided spindle made round at the ends, the knives or beaters being

page_text: at right angles to the axis of the spindle in different rows, and in
straight or direct lines. The fixing of these knives or beaters on to the
sides of the spindles is so arranged that each alternate knife or beater
shall be in the same plane, that is to say, that no two successive knives
5 round the spindle shall follow in the same path.
SPECIFICATION in pursuance of the conditions of the Letters Patent
filed by the said John Henry Johnson in the Great Seal Patent
Office on the 22nd April 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of
Middlesex, Gentleman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-sixth day of October, in the year of
our Lord One thousand eight hundred and seventy-two, in the thirty-
sixth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said John Henry Johnson, Her special license
that I, the said John Henry Johnson, my executors, administrators, and
assigns, or such others as I, the said John Henry Johnson, my executors,
administrators, or 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 MACHINERY
OR APPARATUS TO BE EMPLOYED IN GINNING COTTON," a communication to
me from abroad by George Purvis, of the City of Bombay, upon the
condition (amongst others) that I, the said John Henry Johnson, my
executors or administrators, by an instrument in writing under
my hand
and seal, 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 John Henry Johnson. de hock

page_text: is to be performed, to be particularly described and ascertained in and
by the following statement, reference being had to the accompanying
Drawings, and to the letters and figures marked thereon, that is to
say :-
The said Invention relates to an improved rotatory agitator for cotton |
gins, and consists in constructing a rotatory agitator of a number of flat
teeth made of iron or other suitable metal, and of a knee-shape at the
end, or with plain ends, as the case may be. These teeth are fitted on
edgewise, or rivetted on to pieces or strips of metal of about, say, forty
inches long, more or less, as the case may be, according to circumstances,
which pieces or strips with the teeth are afterwards fixed to a metal
spindle in different rows, thus forming the set of the above-mentioned
teeth at right angles, and bevelling off or inclined in opposite directions
or angles.
The spindle consists of a square body round at the ends, so as to admit
pullies or drums in order to drive the same.
.
It may
also in some cases be made of pentagon, hexagon, octagon,
or cylindrical form, so as to facilitate the attaching of a greater number
of the above-mentioned pieces or strips with teeth, as may be required,
for the purpose of ginning different varieties of kuppas or cottons of
India, or elsewhere.
And in order that the said Invention may be fully understood, I shall
now proceed more particularly to describe the same, and for that purpose
shall refer to the several Figures on the annexed Sheet of Drawings,
the same letters of reference indicating corresponding parts in all the
Figures.
Figure 1 of the accompanying Drawings represents a side elevation of
a portion of an agitator constructed according to this Invention, and
Figure 2 is a transverse section of the same; Figures 3 and 4 are similar
views of a slightly modified form of rotatory agitator.
In all these Figures a, a, are the inclined or oblique teeth; b, b,
(Figures 1 and 2 only), the knee ends, which may be dispensed with,
if preferred, as shown in Figures 3 and 4; c, c, are metal strips to which
the several rows of teeth a are rivetted or otherwise secured; and d is
the square spindle, to the sides of which the said strips c, c, are bolted
or otherwise secured; e is one of the cylindrical ends or journals of the

page_text: spindle, which work in supporting bearings and carry the driving drum
or pulley.
Having now described and particularly ascertained the nature of the
said Invention, and the manner in which the same is or may be used or
carried into effect, I would observe in conclusion that what I consider
to be novel and original, and therefore claim as the Invention secured
to me by the herein-before in part recited Letters Patent is, the peculiar
construction of rotatory agitator to be used in ginning cotton, as herein-
before described and illustrated by the Drawing annexed.
In witness whereof, I, the said John Henry Johnson, have to this
my Specification set my hand and seal, this Twenty-second day
of April One thousand eight hundred and seventy-three.