IMPROVE- MENTS IN MACHINERY OR APPARATUS FOR CLEANING FIBROUS MATERIALS.
Year: 1859

page_text: LETTERS PATENT to John Macmillan Dunlop, of the City of Manchester,
in the County of Lancaster, Engineer, for the Invention of "IMPROVE-
MENTS IN MACHINERY OR APPARATUS FOR CLEANING FIBROUS MATERIALS.
Sealed the 31st August 1859, and dated the 5th March 1859.
PROVISIONAL SPECIFICATION left by the said John Macmillan Dunlop
at the Office of the Commissioners of Patents, with his Petition, on the
5th March 1859.
I, JOHN MACMILLAN DUNLOP, of the City of Manchester, in the County
of Lancaster, Engineer, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR CLEANING FIBROUS MATE-
RIALS," to be as follows:-
My Invention relates, especially to the machine or apparatus used for
cleaning cotton or other fibrous substances, commonly called the McArthy gin
in contradistinction to the saw gin.
My object is to make the McArthy gin suitable and convenient for working
by manual labour or in cottages. I apply a first motion shaft carried in
bearings fixed to the gin sides, on each end of which I fix a handle, on one end.
of the said shaft and immediately behind the handle I fix a spur wheel, which

page_text: drives or gears into a spur pinion fixed on the roller covered with leather
usually used in the above named gins. These wheels are of the necessary
respective diameters to obtain sufficient speed for the efficient working of the
gin when driven by hand.
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 3rd September 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
MACMILLAN DUNLOP, of the City of Manchester, in the County of Lancaster,
Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fifth day of March, in the year of our Lord One
thousand eight hundred and fifty-nine, in the twenty-second 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 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
AI PARATUS FOR CLEANING FIBROUS MATERIALS," upon the condition (amongst
others) that I, the said John Macmillan Dunlop, 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 Macmillan Dunlop, do hereby
declare the nature of my said Invention, and the manner in which the same is
to be performed, to be particularly described and ascertained in and by the
following statement (that is to say):-
My Invention relates] especially to the machine or apparatus used for
cleaning. cotton or other fibrous substances, commonly called the M.Arthy gin,
in contradistinction to the saw gin.

page_text: My object is to make the McArthy gin suitable and convenient for working
by manual labour or in cottages. I apply a first motion shaft carried in
bearings fixed to the gin sides, on each end of which I fix a handle; on one
end of the said shaft and immediately behind the handle I fix a spur wheel,
which drives or gears into a spur pinion fixed on the roller, covered with leather,
usually used in the above named gins. These wheels are of the necessary
respective diameters to obtain sufficient speed for the efficient working of the
gin when driven by hand.
Having thus stated the nature of my Invention, I will proceed more fully
to describe the manner of performing the same.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 represents an end elevation of a McArthy gin, having my Invention
applied thereto; and Fig. 2 a back elevation of the same. The leather covered
roller is shewn at a, on the shaft or axis 6, at one end of which is a pinion or
toothed wheel c, gearing into the larger toothed wheel d, which is keyed or
otherwise fixed to the additional or first motion shaft e, having handles f, f, by
which the roller a can be put in operation by hand labour at any desired
increased speed according to the relative diameters of the toothed wheels cand
d. I would here state that the arrangement of machine above shewn and
described is the one preferred by me in carrying out my Invention, but the
same may be modified by using in place of the toothed wheels c, d, the ordinary
equivalents, namely, chain wheels geared together by a chain. Or in place of
using the toothed wheel d on a back axis or additional shaft, a wheel may be
used with internal or external teeth, such wheel being mounted on a fixed axis,
and actuated by a handle fixed to the wheel, as will be understood by reference
to Figs. 3 and 4, Sheet 2, where the shaft 6 of the roller is turned by the
pinion or toothed wheel c gearing into an internal toothed wheel d, Fig. 8,
and into an external toothed wheel d, Fig. 4, in which arrangements or modi-
fications of the machine I cause the wheel d, with either external or internal
teeth, to gear into a toothed wheel e fixed to the crank shaft f, so that when
motion is given by the handle g the roller and crank shafts turn at a speed in
proportion to the respective diameters of the wheels c, d, and e.
Having thus fully described the nature of my said Invention, and the
manner in which the same is to be performed, I desire it to be distinctly
understood that I do not claim the McArthy gin as hitherto used, nor any of
the mechanical parts separately, but what I claim is,―
The application to or combination with McArthy's gins of additional first

page_text: motion shafts or axes, together with handles, as herein described, and also of
toothed wheels or gearing, as herein explained.
In witness whereof, I, the said John Macmillan Dunlop, have hereunto
set my hand and seal, this Second day of September, in the year
of our Lord One thousand eight hundred, and fifty-nine.
Signed, sealed, and delivered by the within-
named John Macmillan Dunlop, in the
presence of
E. J. HUGHES, Patent Agent,
Manchester.
JOHN M. DUNLOP. (L.S.)