IMPROVE- MENTS IN BOLTING MILLS
Year: 1864

page_text: LETTERS PATENT to Richard Archibald Brooman, of 166, Fleet Street,
in the City of London, Patent Agent, for the Invention of "IMPROVE-
MENTS IN BOLTING MILLS."-A communication from abroad by Edouard
TT
CD
Sealed the 22nd July 1864, and dated the 26th January 1864.
PROVISIONAL SPECIFICATION left by the said Richard Archibald Brooman
at the Office of the Commissioners of Patents, with his Petition, on the
26th January 1864.
I, RICHARD ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of
London, Patent Agent, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN BOLTING MILLS," to be as follows:-
Hitherto in mills for bolting flour and meal it has been customary to fit
tappets in the interior or beaters or other appliances on the exterior of the
bolting or sifting apparatuses, in order to accelerate the bolting, but the
repeated blows of these appliances against the bolting cloth often form holes
therein, the sifted flour is besides of an inferior quality and becomes formed
into lumps, and in order to prevent the meshes of the bolting cloths getting
clogged, it has been necessary to employ cloths with coarser meshes to the
detriment of the flour. By means of the present Invention I am enabled to

page_text: employ bolting cloths with very fine meshes, whereby the flour is more
perfectly sifted, and by dispensing with tappets, beaters, and similar appliances
I avoid the injury to the bolting cloths which they have hitherto caused.
The Invention consists in leading the bran and coarse flour from the last
bolting or sifting apparatus through a channel or pipe to the bottom of an
endless chain carrying cups or buckets; another channel or pipe also leads
the crushed grain from the millstones to the bottom of the endless chain; the
endless chain delivers the bran, coarse flour, and crushed grain at top to
an Archimedean screw, in which they become cooled; the screw is surmounted
by a hopper, by which crushed or uncrushed grain may be supplied to the
screw in any required quantities. The screw delivers the bran, flour, and
grain through a pipe or channel to a first bolting or sifting apparatus, which
bolts or sifts the finer flour or meal, while the coarse flour and bran pass on
through a pipe or channel to a second bolter or sifter. This second bolter or
sifter bolts or sifts the finer of the remaining flour which falls on to a second
Archimedean screw and becomes cooled, falling at the further end of the screw
through a pipe or channel into the channel or pipe first herein-before
mentioned which leads to the endless chain of cups. The coarsest flour and
bran may then pass on to the last bolter or sifter, in which the pollen and
lumps become separated, and are delivered to suitable receptacles. I do not
limit myself to the employment of three bolting or sifting apparatuses, as
more or less may be employed as considered desirable.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Richard Archibald Brooman in the Great Seal Patent Office
on the 26th July 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of London, Patent
Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-sixth day of January, in the year of our
Lord One thousand eight hundred and sixty-four, in the twenty-seventh
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Richard Archibald Brooman, Her special licence that
I, the said Richard Archibald Brooman, my executors, administrators, and
assigns, or such others as I, the said Richard Archibald Brooman, my
executors, administrators, and assigns, should at any time agree with, and

page_text: 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 BOLTING
MILLS," (communicated to me from abroad by Edouard Honoré Vittecoq, of
Beaumontel, France,) upon the condition (amongst others) that I, the said
Richard Archibald Brooman, my executors or administrators, by an instru-
ment 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 imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Richard Archibald Brooman, 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, reference being had to the Drawings hereunto
annexed, that is to say :-
Hitherto in mills for bolting flour and meal it has been customary to fit
tappets in the interior or beaters or other appliances on the exterior of the
bolting or sifting apparatuses, in order to accelerate the bolting, but the
repeated blows of these appliances against the bolting cloth often form holes
therein, the sifted flour is besides of an inferior quality and becomes formed
into lumps, and in order to prevent the meshes of the bolting cloths getting
clogged, it has been necessary to employ cloths with coarse meshes to the
detriment of the flour.
Now this Invention consists in introducing and causing to circulate freely in
the bolting mill coarse bran and crushed grain with the meal or flour in such
manner that the meal or flour is cooled and prevented from becoming attached
to and clogging the meshes of the bolting cloths. I am thus enabled to
employ cloths with very fine meshes, whereby the flour is more perfectly sifted,
and by dispensing with tappets, beaters, and similar appliances, I avoid the
injury to the bolting cloths which they have hitherto caused. I lead the bran
and coarse flour from the last bolting or sifting apparatus through a channel
or pipe to the bottom of an endless chain carrying cups or buckets; another
channel or pipe also leads the crushed grain from the millstones to the bottom
of the endless chain. The endless chain delivers the bran, coarse flour, and
crushed grain at top to an Archimedean screw, in which they become
cooled; the screw is surmounted by a hopper by which bran or crushed or
uncrushed grain may be supplied to the screw in any required quantities.

page_text: The screw delivers the bran, flour, and grain through a pipe or channel to a
first bolting or sifting apparatus, which bolts or sifts the finer flour or meal,
while the coarse flour and bran pass on through a pipe or channel to a second
bolter or sifter. This second bolter or sifter bolts or sifts the finer of the
remaining flour, which falls on to a second Archimedean screw and becomes
cooled, falling at the further end of the screw through a pipe or channel into
the channel or pipe first herein-before mentioned which leads to the endless
chain of cups. The coarsest flour and bran may then pass on to the last
bolter or sifter, in which the pollen and lumps become separated and are
delivered to suitable receptacles. I do not limited myself to the employment
of three bolting or sifting apparatuses, as more or less may be employed
as considered desirable.
The accompanying Drawing represents a bolting mill constructed according
to my Invention with three bolting apparatuses. I lead the bran and coarse
flour from the last bolting apparatus M, through a channel or pipe P to the
bottom of an endless chain C, carrying cups or buckets; another channel or
pipe B leads the crushed grain from the millstones A also to the bottom of
the endless chain C. The chain C delivers the bran, coarse flour, and crushed
grain at top to an Archimedean screw F, in which they become cooled; the
screw F is surmounted by a hopper T, by which bran or crushed or uncrushed
grain is supplied to the screw. The screw F delivers the bran, flour, and
grain through a pipe or channel E to a first bolting or sifting apparatus G,
which bolts or sifts the finer flour or meal into the chamber O, while the
coarse flour and bran pass on through a pipe or channel I to a second bolter
or sifter K. This belter sifts the finer of the remaining flour, which falls on
to a second Archimedean screw N and becomes cooled, falling at the further
end of the screw through a channel or pipe into the channel P, which leads
to the endless chain of cups C. The coarsest flour and bran pass on from the
bolter K to the third bolter M, by which the pollen is bolted into the
compartment Q, while the lumps pass out at the end of the bolter, and are
received in a receptacle S. By means of the bran or grain introduced into
the mill by the happer T, the flour or meal is finely divided, and at the same
time cooled, while the friction of the bran or grain against the bolting cloths
prevents the meshes becoming clogged.
And having now described the nature of the said Invention, and in what
manner the same is to be performed, I declare that I do not limit myself to
the employment of a hopper for introducing the bran or grain into the boling
mill, or of Archimedean screws for conveying the flour, bran, and grain, as
other appliances may be conveniently adopted, and that I claim constructing

page_text: bolting mills in which bran and grain may be introduced and circulate with
the flour or meal, substantially in manner and for the purposes herein-before
described.
In witness whereof, I, the said Richard Archibald Brooman, have here-
unto set my hand and seal, this Twenty-fifth day of July, One thousand
eight hundred and sixty-four.