IMPROVEMENTS IN MACHINERY FOR GINNING COTTON
Year: 1863

page_text: LETTERS PATENT to John Macmillan Dunlop, of Manchester, in the
County of Lancaster, Engineer, for the Invention of "IMPROVEMENTS IN
MACHINERY FOR GINNING COTTON."
Sealed the 11th September 1863, and dated the 31st March 1863.
PROVISIONAL SPECIFICATION left by the said John Macmillan Dunlop
at the Office of the Commissioners of Patents, with his Petition, on the
31st March 1863.
I, JOHN MACMILLAN DUNLOP, of Manchester, in the County of Lancaster,
Engineer, do hereby declare the nature of the Invention for "IMPROVEMENTS
IN MACHINERY FOR GINNING COTTON," to be as follows:-
To that class of machinery known as Macarthy's gin I apply a cylinder or
shaft with pegs or agitators placed near the point of contact of the gin roller
and the knife or "doctor" on the feeding side of the gin, or it may be a
cylinder with a vane or vanes set spirally or inclined to the axis. The shaft
or cylinder above mentioned is carried in brackets or bearings secured to the
framing of the gin, and may be used with or without a grated rack hereafter
referred to, or the shaft or cylinder may be carried by the ends of the grated
racks described in the Specification of my Patent No. 1922, dated July 1st
1862, and in the latter case would move up and down with the grated rack;
I, however, prefer the former. The shaft or cylinder above described is to
have a suitable revolving motion given to it, or it may have one or more
revolutions first in one direction and then in the other; or it may have an

page_text: intermittent motion; or it may have a lateral motion. The object of these
arrangements is to keep presenting the seed cotton to the action of the roller
and knife, that it may be more readily engaged thereby, and the seed
separated from the cotton, the shaft or cylinder in place of being provided
with the vane pegs or agitators, as above described, may be a roller, either
fluted, toothed, or covered, so that it will move the seed cotton, and keep it
in constant movement at the feeding part of the machine. These improve-
ments may also be applied to the roller churka gin, one or both of the rails
shewn and described in the Specification of the Patent above referred to, and
which carry the "doctors" in place of being applied as therein described, is or
are made to swivel on pivots which fit into holes bored or formed in tho
frames. These rails, with the "doctors" attached to them, when so made to
swivel are kept in their proper working position relatively with the covered
rollers of the gin by set screws screwed into snugs cast with or formed on the
framing, and they are thus caused to give the necessary pressure against the
covered rollers. The top of the wood connecting rods, and the moveable knife
described in the Specification of my said former Patent, in place of being
arranged and connected as therein described, have shoes applied; into which
the wood connecting rods are fitted. These shoes are bolted to the moveable
knife, and have projections downwards to admit of their being well secured to
the wood connecting rods. A cross bar or projection is cast across each of the
shoes, and a corresponding notch is cut out of each of the wood connecting
rods, so that the strain does not entirely depend upon the bolts.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Macmillan Dunlop in the Great Seal Patent Office on
the 25th September 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
MACMILLAN DUNLOP, of Manchester, in the County of Lancaster, Engineer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirty-first day of March, in the year of our
Lord One thousand eight hundred and sixty-three, in the twenty-sixth year
of Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said John Macmillan Dunlop, Her special licence that I, the said
John Macmillan Dunlop, my executors, administrators, and assigns, or such
others as I, the said John Macmillan Dunlop, my executors, administrators, and

page_text: 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 "Iм-
PROVEMENTS IN MACHINERY FOR GINNING COTTON," upon the condition (amongst
others) that I, the said John Macmillan Dunlop, 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 Inven-
tion, 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 Macmillan Dunlop, do hereby
declare the nature of the 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 :-
To that class of machinery known as Macarthy's gin I apply a cylinder or
shaft with pegs or agitators placed near the point of contact of the gin roller
and the knife or "doctor" on the feeding side of the gin, or it may be a
cylinder with a vane or vanes set spirally or inclined to the axis. The shaft or
cylinder above mentioned is carried in brackets or bearings secured to the
framing of the gin, and may be used with or without a grated rack hereafter
referred to, or the shaft or cylinder may be carried by the ends of the grated
racks described in the Specification of my Patent No. 1922, dated July 1st
1862, and in the latter case would move up and down with the grated rack.
I, however, prefer the former. The shaft or cylinder above described is to
have a suitable revolving motion given to it, or it may have one or more
revolutions first in one direction and then in the other; or it may have an
intermittent motion; or it may have a lateral motion.
The object of these arrangements is to keep presenting the seed cotton to
the action of the roller and knife that it may be more readily engaged thereby,
and the seed separated from the cotton. The shaft or cylinder in place of
being provided with the vane pegs or agitators, as above described, may be
a roller, either fluted, toothed, or covered, so that it will move the seed cotton,
and keep it in constant movement at the feeding part of the machine.
These improvements may also be applied to the roller churka gin. One or
both of the rails shown and described in the Specification of the Patent above
referred to, and which carry the "doctors," in place of being applied as therein
described, is or are made to swivel on pivots which fit into holes bored or
formed in the frames. These rails, with tho "doctors" attached. to them, when

page_text: so made to swivel are kept in their proper working position relatively with the
covered rollers of the gin by set screws screwed into snugs cast with or
formed on the framing, and they are thus caused to give the necessary pressure
against the covered rollers.
The top of the wood connecting rods and the moveable knife described in
the Specification of my said former Patent, in place of being arranged and
connected as therein described, have shoes applied, into which the wood
connecting rods are fitted. These shoes are bolted to the moveable kuife, and
have projections downwards to admit of their being well secured to the wood
connecting rods. A cross bar or projection is cast across each of the shoes,
and a corresponding notch is cut out of each of the wood connecting rods, so
that the strain does not entirely depend upon the bolts.
DESCRIPTION OF THE DRAWINGS.
Figure 1 represents the two rollers, single beater plate, and grated racks or
feed troughs, as described in the Specification of my Patent, dated July 1st
1862. In addition thereto there is also shown the two cylinders or shafts A, A',
with the pegs or agitators placed near the point of contact of the gin roller
and the knives or "doctors" on the feeding side of the gin. Instead of having
the pegs or agitators, the cylinders A, A', may have vanes set spirally or inclined
to the axis; these shafts or cylinders are carried in brackets or bearings
secured to the framing of the gin, there being slots in the ends of the grated
racks or troughs to allow the ends to pass through, or they may be carried by
the ends of the grated racks or feed troughs before referred to, and in this caso
would move up and down with the grated racks or feed troughs, but I prefer
the former.
Figure 2 shews the application of the cylinder or shaft to the single roller
gin having the grated rack or feed trough before referred to. Figures 3 and 4
shew the application of this cylinder or shaft with the pegs to the ordinary
single roller gin with the usual feed table, and without the grated racks or feed
troughs before referred to, the pegs passing through the wires in one view, and
moving the seed cotton to be engaged by the gin. It may be placed either
above the usual feed table, as at Figure 3, or below it as at Figure 4; in this
case the cylinders or shafts may be applied to double roller gins in the same
manner as here shewn applied to single roller gins, such double roller gins not
having the grated. racks or feed troughs, but having the usual feed tables.
Any or all of these cylinders or shafts in place of being provided with pegs,
agitators, or spiral vanes as before described, may be rollers, fluted, toothed, or
covered, so that they will move the seed cotton, and keep it in movement at

page_text: the feeding part of the machine. A suitable revolving motion is to be com-
municated to these shafts or cylinders from any convenient part of the gin, such
as the rollers, or they may have one or more revolutions, first in one direction
and then in the other; or they may have an intermittent motion; or they
(excepting when arranged as in Figure 4) may have a lateral motion with or
without the before-mentioned rotating motions. The object of these arrange-
ments is to keep presenting the seed cotton to the action of the roller and
knife, that it may be more readily engaged thereby, and the seed separated
from the cotton.
Figure 5 shows the application of the shaft or cylinder to the roller churka
gin when using a feeding trough.
Figure 1 also represents one or both of the rails B, B', which carry the
"i doctors." In place of being applied as shewn in the Drawing of the
Specification Patent, dated July 1st 1862, they are made to swivel on pivots
C, C', which fit into holes bored or formed in the frames, or which may fit
into holes formed in adjustable brackets bolted to the frames. These rails
with the doctors attached to them, when so made to swivel, are kept in their
proper working position relatively with the covered rollers of the gin by the set
screws D, D', screwed into the snugs E, E¹, cast with or formed on the
framing of the gin, and they are thus caused to give the necessary pressure
against the covered rollers F, F'.
The top of the wood connecting rods and the moveable knife or beater plate
described and shown in the Specification of my Patent already referred to, in
place of being arranged and connected as therein described have shoes or
intermediate pieces, Figure 6, into which the wood connecting rods are fitted;
these shoes are bolted to the beater plate bolts passing through the holes H,H',
and have projections downwards to admit of their being well. secured to the
wood connecting rods by bolts passing through the holes I, I¹. A cross bar or
projection M is cast across each of the shoes, and a corresponding notch is cut
out of each of the wood connecting rods, so that the strain does not depend
entirely upon the bolts.
.
In witness whereof, I, the said John Macmillan Dunlop, have hereunto
set my hand and seal, this Twenty-first day of September, in the
year of our Lord One thousand eight hundred and sixty-three.
.
JOHN M. DUNLOP. (L.S.)`