AN IMPROVEMENT IN BEATERS OF THRASHING MACHINES
Year: 1857

page_text: LETTERS PATENT to Henry Brinsmead, of Ipswich, Machinist, for the
Invention of "AN IMPROVEMENT IN BEATERS OF THRASHING MACHINES."
Sealed the 26th February 1858, and dated the 31st August 1857.
PROVISIONAL SPECIFICATION left by the said Henry Brinsmead at
the Office of the Commissioners of Patents, with his Petition, on the
31st August 1857.
I, HENRY BRINSMEAD, of Ipswich, Machinist, do hereby declare the nature
of the Invention for "AN IMPROVEMENT
"AN IMPROVEMENT IN THE BEATERS OF THRASHING
MACHINES," to be as follows:-
This Invention has for its object an improvement in the beaters of thrashing
machines. For this purpose the face or acting part of each beater of a
thrashing machine is constructed of a screw or instrument with inclined
threads or projections around it, which is affixed or applied to the face of the
beater, in such manner as to act as a fixed instrument, presenting only part
of its circumference when at work, but capable of being readily changed in
position in order to bring a fresh part into position when the part which has
been in action for some time has become worn. This is conveniently
accomplished by mounting the screw or instrument on centering points at the
ends, and by having two or other number of clamps fixed over the screw or

page_text: instrument into the beater intermediate of the ends, the threads or projections
of the screw or instrument being cut away where the clamps come, in order
that the clamps may not enlarge the diameter of the screw or instrument.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Henry Brinsmead in the Great Seal Patent Office on the
26th February 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
BRINSMEAD, of Ipswich, Machinist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirty-first day of August, in the year of our Lord
One thousand eight hundred and fifty-seven, in the twenty-first year of Her
reign did, for Herself, Her heirs and successors, give and grant unto me,
the said Henry Brinsmead, Her special licence that I, the said Henry
Brinsmead, my executors, administrators, and assigns, or such others as
I, the said Henry Brinsmead, 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 "AN IM-
PROVEMENT IN THE BEATERS OF THRASHING MACHINES," upon the condition
(amongst others) that I, the said Henry Brinsmead,, my executors or admi-
nistrators, 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 Henry Brinsmead, do hereby declare
the nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say :-
This Invention has for its object an improvement in the beaters of thrash-
ing machines. For this purpose the face or acting part of each beater of a
thrashing machine is constructed of a screw or instrument with inclined
threads or projections around it, which is affixed or applied to the face of the
beater in such manner as to act as a fixed instrument presenting only part of

page_text: its circumference when at work, but capable of being readily changed in
position in order to bring a fresh part into position when the part which has
been in action for some time has become worn. This is conveniently accom-
plished by mounting the screw or instrument on centering points or axes at
the ends, and by having two or more clamps fixed over the screw or instru-
ment into the supporting intermediate rings of the drum, the threads or
projections of the screw or instrument being cut away where the clamps
come, in order that the clamps may not enlarge the diameter of the screw or
instrument.
Having thus stated the nature of my Invention, I will proceed more fully
to describe the manner of performing the same.
DESCRIPTION OF THE DRAWING.
Figure 1 is a side view of a thrashing machine drum constructed with
beaters according to my Invention. Figure 2 is an end view of the same,
and Figure 3 is a view of a beater separately. The same letters refer to the
same parts in all three Figures. a is the shaft or axis of the drum; b, b, are
the arms keyed to the shaft, having rings c, c, rivetted on to receive the wood
beds d, d, for the beaters e, e; f, f, are the clamps to hold the beaters e, e,
and beds d, d, firmly to the rings c, c; g, g, are rings of flat iron rivetted to
the arms at each end of the drum, having holes to receive the axes or centre-
ing points h, (Figure 3) of the beaters. When the beaters e, e, are become
worn, a new face may be produced by loosing the clamps f, f, and then
turning the beaters e, e, about one-sixth of a revolution of their axes or
centreing points h, and then tightening the clamps again. It will thus be
seen that a set of beaters are capable of being changed in position at least
six times, in order to bring a fresh part into position. Although the accom-
panying Drawings represent the threads of the beaters as all running in one
direction, yet I find it better to have the directions of the threads different in
every alternate beater, that is, one beater having its threads inclined to the
right hand, and the next beater having its threads inclined to the left hand.
It should be clearly understood, that although I have shewn and described the
forms of the beating instrument I prefer, I do not confine myself thereto, or
to any form of beater, or of its inclined threads or projections, so long as the
peculiar construction of beaters herein described be retained. The front
edges of the wood beds d, d, are shaped off to a sharp edge, and sheathed
with wrought iron on the side exposed to wear. This form offers less resist-
ance to the air, and consequently the drum revolves very freely.
Having described the nature of my Invention, and the manner of perform-

page_text: ing the same, I claim the constructing of the acting parts or faces of the
beaters of a thrashing machine of screws or instruments with inclined threads
or projections around them, which act as fixed instruments presenting only
parts of their circumferences when at work, but are capable of being readily
changed in position in order to bring fresh parts into position.
In witness whereof, I, the said Henry Brinsmead, have hereunto set
my hand and seal, this Eighteenth day of February, in the year of our
Lord One thousand eight hundred and fifty-eight.
Witness,
ARTHUR THOMAS COLE, of Ipswich,
Accountant.
HENRY BRINSMEAD. (L.S.)