IMPROVEMENTS IN THRESHING AND DRESSING MACHINES
Year: 1858

page_text: LETTERS PATENT to John Coulson, of the firm of J. and W. Midworth,
of Newark, in the County of Nottingham, Engineers, for the Invention
of "IMPROVEMENTS IN THRESHING AND DRESSING MACHINES."
Sealed the 27th May 1859, and dated the 30th November 1858.
PROVISIONAL SPECIFICATION left by the said John Coulson at the
Office of the Commissioners of Patents, with his Petition, on the 30th
November 1858.
I, JOHN COULSON, of the firm of J. and W. Midworth, of Newark, in the
County of Nottingham, Engineers, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN THRESHING AND DRESSING MACHINES," to be as
follows:-
My Invention consists, first, in forming the springs or bars by which the
shoes, riddles, and shog. boards of the sifting or riddling apparatus of threshing
and dressing machines are suspended thicker at the ends than at the middle,
that is, tapering from the ends towards the middle, whereby greater ease and
freedom of motion are obtained in the moving parts of the apparatus. The
said springs or bars may be formed of steel, wood, or any other suitable
material. And my Invention consists, secondly, in forming the beating
surfaces of the beaters of threshing machines of a half octagon form in section,
three of the sides being furnished with oblique ridges or projections placed
alternately in opposite directions.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Coulson in the Great Seal Patent Office on the
30th May 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
COULSON, of the firm of J. and W. Midworth, of Newark, in the County of
Nottingham, Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirtieth day of November, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-second year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said John Coulson, Her special licence that I, the said John Coulson,
my executors, administrators, and assigns, or such others as I, the said
Jolin Coulson, my executors, administrators, and assigns, should at any
time agree with, and no others, from time to time and at all times there-
after 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 "IMPROVE-
MENTS IN THRESHING AND DRESSING MACHINES," upon the condition (amongst
others) that I, the said John Coulson, 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
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said John Coulson, 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 follow-
ing statement thereof, reference being. had to the Drawings hereunto annexed,
that is to say:-
My Invention consists, first, in forming the springs or bars by which the
shoes, riddles, and shog boards of the sifting or riddling apparatus of threshing
and dressing machines are suspended thicker at the ends than at the middle,
that is, tapering from the ends towards the middle, whereby greater ease and
freedom of motion are obtained in the, moving parts of the apparatus; the
said springs or bars may be formed of steel, wood, or any other suitable
material. And my Invention consists, secondly, in forming the beating
surfaces of the beaters of threshing machines of a half octagon form in section,

page_text: three of the sides being furnished with oblique ridges or projections placed
alternately in opposite directions.
Figure 1 is a side elevation, shewing the springs a, a, applied to a riddle;
Figure 2 is a detached view of one of the springs on an enlarged scale;
Figures 3, 4, and 5 are views of portions of my improved beaters, with
the beating surfaces a, a, formed as shewn in front view in Figure 3, and in
transverse and perspective sections in Figures 4 and 5.
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,-
First, forming the springs or bars by which the shoes, riddles, and shog
boards of the sifting or riddling apparatus of threshing and dressing machines
are suspended thicker at the ends than at the middle, in the manner and for
the purpose herein-before described.
Second, forming the beating surfaces of the beaters of threshing machines
of a half octagon form in section, and with the three sides furnished with
oblique ridges or projections placed alternately in opposite directions, in the
manner herein-before described.
In witness whereof, I, the said John Coulson, have hereunto set my
hand and seal, this Twenty-eighth day of May, One thousand eight
hundred and fifty-nine.
JOHN COULSON. (L.S.)