IMPROVEMENTS APPLICABLE TO MACHINERY FOR GRINDING WHEAT AND OTHER GRAIN, CEMENT, AND OTHER SUBSTANCES."
Year: 1855

page_text: LETTERS PATENT to Richard Peaker, of Methley, in the County of York,
Corn Miller, and Thomas Bentley; of Wakened, in the same County,
Corn Miller, for the Invention of "IMPROVEMENTS APPLICABLE TO MACHINERY
FOR GRINDING WHEAT AND OTHER GRAIN, CEMENT, AND OTHER SUBSTANCES."

page_text: such apparatus adapted to the runner. To the draft pipe we also adapt a
series of revolving perforated discs, situate one above another, and which
alternately move into and out of the said pipe in such order that the area is
always intercepted upon these discs. When in their outward position, a brush
or other such apparatus is caused to operate.
Another part of our improvements relates to the cutting of stones or other
grinding surfaces. The plan we adopt is to cut a series of long furrows, and
from each of these one short furrow extending to the outer periphery of the
stone.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Richard Peaker and Thomas Bentley in the Great Seal
Patent Office on the 18th December 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, RICHARD
PEAKER, of Methley, in the County of York, Corn Miller, and THOMAS
BENTLEY, of Wakefield, in the same County, Corn Miller, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighteenth day of June, in the year of our Lord
One thousand eight hundred and fifty-five, in the eighteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said Richard Peaker and Thomas Bentley, Her especial licence that we, the
said Richard Peaker and Thomas Bentley, our executors, administrators, and
assigns, or such others as we, the said Richard Peaker and Thomas Bentley,
our 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 APPLICABLE TO MACHINERY
FOR GRINDING WHEAT AND OTHER GRAIN, CEMENT, AND OTHER SUBSTANCES," upon
the condition, amongst others, that we, the said Richard Peaker and Thomas
Bentley, by an instrument in writing under our hands and seals, or under the
hand and seal of one of us, should particularly describe and ascertain the
nature of the said Invention; and in what manner the same was to be per-
formed, 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 Richard Peaker, do hereby declare the
nature of our said Invention, and in what manner the same is to be per

page_text: formed, to be particularly described and ascertained in and by the following
statement and accompanying Drawings, that is to say:-
Our Invention refers, firstly, to such grinding apparatus as is provided with
an enclosed case, from which air is drawn by a fan or by other exhausting.
means, and consists in certain methods of preventing light particles of .the
material under operation from passing off. In the accompanying. Drawing
Fig. 1 represents, in section, this portion of our Invention complete.;_and_
Fig. 2 is a sectional plan view. The bed stone is shewn at a, and the runner
at b, driven by any ordinary means.
The whole is enclosed within a casing c,.
and the material is supplied through a passage d, after the ordinary manner.
Within the casing c is placed a division plate e, perforated with a number of
holes, and so adapted as to be capable of a certain amount of vibration. To
this plate is fixed a bracket carrying a lever f, which projects downward a
short distance. Upon the runner bare mounted--a series of vanes, as at g,
which as they revolve arrive in contact with the short lever f, and communicate
a shaking motion to the perforated plate. Attached to the casing c is a pipe h,.
in communication with a fan or other exhausting apparatus. This pipe is
enlarged at i, and within that part is mounted a short shaft h, to which a slow
rotatory motion is communicated by means of a friction disc and pulley k, driven
from a shaft, which receives rotatory motion by connection with any convenient
situation. Upon the shaft h are mounted discs 1, one of which is shewn
detached in face view at Fig. 3. These discs have a series of openings formed
in them extending over half their surfaces, and they are so situate upon the
shaft that the said openings are on opposite sides of the centre of motion; as
they revolve they are cleared by the action of brushes m. The corn or other
material being supplied and ground as usual, the finer particles will be drawn
upward by the exhausting apparatus, but will be checked in their passage
by the plate e; the perferations thereof, however, might become stopped, and
the passage of air prevented, but this is avoided by the periodical tapping
which the lever f receives, thereby communicating a vibration to the plate e,
and consequent shaking down of the material. Some of the lightest particles
may, however, pass upward through the pipe h, but here they are intercepted
by the perforated plates 7, the apertures in which are kept clear by the brushes
m. During the running of the stone the vaues g will act as a fan, and serve to
prevent à violent action up the draught pipe h.
We have shewn and described a certain method by which the material
resting against the plate c is removed; but we do not confine ourselves thereto;
as modifications thereof may be adopted; as, for instance, a brush or scraper
may be placed upon the runner, so as to move continually in contact with the

page_text: plate instead of acting thereon at intervals. We have also shewn but two
plates 1, but if desired more may be employed, situate one above another, and
instead of the exact arrangement described the discs. may be placed upon a
"shaft on the outside of the pipe, one half of their diameter extending within.
The next part of our Invention is shewn at Fig. 4, which represents the
surface of a mill stone cut or dressed according to our Invention. The plan
we adopt is to cut a series of long furrows a, and from each of these one short
furrow b, extending to the outward periphery of the stone. We have shewn
our improvements constructed as an ordinary corn mill, but variations may be
made in order to suit the apparatus for grinding cement and other substances.
Having thus described and ascertained the nature of our said Invention,
and the manner in which the same is to be performed, I desire it to be under-
stood that we claim, as secured to us under the above in part recited Letters
.Patent,-
Firstly, the perforated division plate e extending across the casing.
Secondly, the employment of an agitator, brush, or equivalent apparatus, for
removing the material from perforated surfaces, used for a similar purpose to
that represented at e.
Thirdly, the employment of rotatory or other perforated surfaces acting within
the exhaust pipe.
Fourthly, the method of cutting stones above described..
In witness whereof, I, the said Richard Peaker, have hereunto set my
hand and seal, this Fifteenth day of December, in the year of our Lord
One thousand eight hundred and fifty-five.
RICHARD FEAKER. (L.S.)