AN IMPROVEMENT IN THE MANUFACTURE OF PERFORATED BEATERS FOR THRASHING MACHINES
Year: 1858

page_text: LETTERS PATENT to George Allam Barrett, William Exall, and Charles
James Andrewes, all of Reading, in the County of Berks, Engineers and
Machinists, for the Invention of "AN IMPROVEMENT IN THE MANUFACTURE
Sealed the 9th August 1858, and dated the 11th February 1858.
PROVISIONAL SPECIFICATION left by the said George Allam Barrett,
William Exall, and Charles James Andrewes at the Office of the Com-
missioners of Patents, with their Petition, on the 11th February 1858.
We, GEORGE ALLAM BARRETT, WILLIAM EXALL, and CHARLES JAMES
ANDREWES, all of Reading, in the County of Berks, Engineers and Machinists,
do hereby declare the nature of the said Invention for "AN IMPROVEMENT IN
THE MANUFACTURE OF PERFORATED BEATERS FOR THRASHING MACHINES," to be
as follows:
Our Invention consists in manufacturing the perforated beaters for thrashing
machines of a greater thickness at and near that part which is subjected to
wear than at the ends. Hitherto these beaters have been formed of plates or
pieces of iron of uniform thickness, perforated and then bent into the required
form; and it has been found that the bending and the wear have reduced
their thickness at their middle where the beating action is exerted. By rolling

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said George Allam Barrett, William Exall, and Charles James
Andrewes in the Great Seal Patent Office on the 11th August 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, GEORGE
ALLAM BARRETT, WILLIAM EXALL, and CHARLES JAMES ANDREWES, all of
Reading, in the County of Berks, Engineers and Machinists, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eleventh day of February, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-first year of Her
reign, did, for Herself, Her heirs, and successors, give and grant unto us, the
said George Allam Barrett, William Exall, and Charles James Andrewes, Her
special licence that we, the said George Allam Barrett, William Exall, and
Charles James Andrewes, our executors, administrators, and assigns, or such
others as we, the said George Allam Barrett, William Exall, and Charles
James Andrewes, our 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 "AN IM-
*PROVEMENT IN THE MANUFACTURE OF PERFORATED BEATERS FOR THRASHING
MACHINES," upon the condition (amongst others) that we, the said George
Allam Barrett, William Exall, and Charles James Andrewes, or one of us,
our executors or administrators, by an instrument in writing under our, or
their, or one of our or 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 George Allam Barrett, William Exall,
and Charles James Andrewes, 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 thereof, reference
being had to the Drawings hereunto annexed, that is to say:―
Our Invention consists in manufacturing the perforated beaters for thrashing

page_text: machines of a greater thickness at and near that part which is subjected to
wear than at the ends or other part. Hitherto these beaters have been formed
of plates or pieces of iron of uniform thickness, perforated and then bent into
the required form; and it has been found that the bending and the wear have
reduced their thickness at the middle where the beating action is exerted.
By rolling the unbent bar thicker at the middle than at the ends, then per-
forating it and bending it to the required form, we remedy this defect without
increasing the weight of the drum. We form the beaters either of iron or
steel, and perforate them either before or after they are bent.
In the Drawings hereunto annexed, we have represented at Figure 1 a trans-
verse section of a full size beater bar constructed with our improvement, and
before it is perforated and bent into form. At Figure 2 we have shown a
similar section of the bar after it has been perforated and bent into form; and
at Figure 3 we have shown a plan view of a portion of the same bar in the
like state. At Figure 4 we have shown a plan view of a complete beater bar
one-fourth the full size. We do not limit ourselves to any amount of increase
in the thickness of the bar at the working part, or to any dimensions
whatever.
And having now described the nature of our said Invention, and in what
manner the same is to be performed, we declare that we claim the use and
manufacture of perforated beaters for thrashing machines of a greater thick-
ness at and near the part which is subjected to the beating action than at the
ends or other parts.
In witness whereof, we, the said George Allam Barrett, William Exall,
and Charles James Andrewes, have hereunto set our hands and seals,
this Ninth day of August, One thousand eight hundred and fifty-
eight.
Signed, scaled, and delivered in the
presence of
Tuo. JAMES,
Kates Grove Iron Works,
Reading.
GEORGE A. BARRETT. (L.S.)
WILLIAM EXALL.
(L.S.)
CHAS. J. ANDREWES. (L.S.)