IMPROVEMENTS IN MILLS FOR GRINDING CORN AND OTHER HARD SUBSTANCES
Year: 1866

page_text: LETTERS PATENT to Walkden Thompson and Thomas Stather, of the
Borough of Kingston-upon-Hull, Engineers, for the Invention of
"IMPROVEMENTS IN MILLS FOR GRINDING CORN AND OTHER HARD SUBSTANCES."
Sealed the 11th January 1867, and dated the 13th July 1866.
PROVISIONAL SPECIFICATION left by the said Walkden Thompson and
Thomas Stather at the Office of the Commissioners of Patents, with
their Petition, on the 18th July 1866.
We, WALKDEN THOMPSON and THOMAS STATHER, of the Borough of Kingston-
upon-Hull, Engineers, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN MILLS FOR GRINDING CORN AND OTHER HARD SUBSTANCES,"
to be as follows:-
Our Invention consists in constructing and arranging mills as hereafter
described. Inside an outer circular casing or dium we place a ring formed
on its outer periphery with teeth, into which the teeth of a pinion fitted
between the ring and the outer casing gear; the part of the casing where this
pinion is fitted is enlarged to receive it; the ring is formed at one or both
side or edges with a projecting rib or fillet which takes into a corresponding
cucular groove in the casing so that the ring is steadied in its revolution
while the ribs at the same time prevent the reduced substance escaping from
within the ring except through the pipe hereafter mentioned within the
ring, upon a central shaft to which rotary motion is communicated, I fit four
or other convenient number of arms, the outer ends of which are by preference

page_text: faced with steel and reach to within a short distance of the inner periphery
of the ring The material to be operated upon is fed through an opening in
the side of the outer casing near the central shaft, and the revolving arms
grind or crush it against the inside of the ring, to which a slower rotary motion
is simultaneously imparted by means of the pinion before mentioned. For
operating upon substances of large size we employ ribbed rollers or crackers,
or other breaking apparatus in proximity to the mill herein-before described,
so that the substances may be broken up before entering the mill, these
rollers on apparatus may also serve to feed the substance regularly to the
mill. The blast created by the revolving arms in the mill drives the substance
after having been reduced to powder into a pipe at the upper part, from
which it passes to an inclined cylindrical or other shaped middle, through the
sides of which that portion which has been sufficiently reduced is bolted on
sifed, while that which has not been sufficiently reduced issues at the lower
end of the middle, and may be returned to the mill. We do not in all cases nit
the ring so as to revolve; for operating on some substances we prefer it to be
fixed or stationary.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Walkden Thompson and Thomas Stather m the Great Seal
Patent Office on the 12th January 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WALKDEN
THOMPSON and THOMAS STATHER, of the Borough of Kingston-upon-Hull,
Engineers, send greeting.
WHEREAS Пler most Excellent Majesty Queen Victoria, by Her Letters
Patent, beaning date the Thirteenth day of July, in the year of our Lord
One thousand eight hundred and sixty-six, in the thu tieth year of Oler
reign, did, for Herself, ler hens and successors, give and grant unto us, the
said Walkden Thompson and Thomas Stather, Her special licence that we,
the said Walkden Thompson and Thomas Stather, our executors, adminis-
trators, and assigns, or such others as we, the said Walkden Thompson and
Thomas Stather, 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 "IMPROVE-
MENTS IN MILLS FOR GRINDING CORN AND OTHER HARD SUBSTANCES," upon the

page_text: condition (amongst others) that we, the said Walkden Thompson and Thomas
Stather, or one of us, our executors or administrators, by an instrument in
writing under our, or one of our, 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 we, the said Walkden Thompson and Thomas
Stather, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement thereof, reference being had to the
Diawings hereunto annexed, that is to say -
Our Invention consists in constructing and ananging mills as hereafter
described and represented in the Drawings
Inside an outer circular casing or drum, as shewn at A in vertical section
in Figure 1, in transverse section in Figure 2, and in plan in Figure 3, we
place a ring B, formed on its outer periphery with teeth, into which the teeth
of a pinion C fitted between the ring B and the outer casing A gear; the part
of the casing A where this pinion is fitted is enlarged as shown to receive it
The ring B is formed at both sidos or edges (or it may be at one side or edge
only) with a projecting rib or fillet D, which takes into a corresponding
cucular groove in the casing A, so that the ring B is steadied in its revolution,
while the ribs D at the same time prevent the reduced substance escaping from
within the ring except through the pipe berealter mentioned. Within the ring
B upon a central shaft E, to which rotary motion is communicated from a
pulley F or otherwise, 1 fit four or other convenient number of arms G, tho
outer ends of which are by preference faced with steel and reach to within a
short distance of the inner periphery of the ring The material to be operated
upon is fed through an opening II in the side of the outer casing A, and the
revolving aims G grind or crush it against the inside of the ung B, to which
a slower rotary motion is simultaneously imparted by means of the pinion C,
which is mounted on a shaft I. For operating upon substances of large size
we employ ribbed rollers or crackers K, K, as shewn in the plan view, Figure 4,
or other breaking apparatus, in proximity to the mill herein-before described, so
that the substances may be broken up before entering the mill; these rollers of
apparatus may also serve to feed the substance regularly to the mill The blast
created by the revolving arms G in the mill drives the substance after baving
been reduced to powder into a pipe L, which may be at the upper part as
shown or in other convenient position, from which it passes to an inclined

page_text: cylindrical or other shaped riddle M, shewn in Figure 4, and also in elevation
in Figure 5, through the sides of which riddle that portion which has been
sufficiently reduced is bolted or sifted, while that which has not been suffi-
ciently reduced issues at the lower end of the riddle, and may be returned to
the mill. We do not in all cases fit the ring B so as to revolve; for operating
on some substances we prefer it to be fixed or stationary, and ribbed inside
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,-
First, the combination in mills of an outer casing, a revolving ring toothed
on its outer periphery and plain or ribbed on its inner periphery, and of
revolving arms, substantially as and for the purpose herein-before described
and represented in Figures 1, 2, and 3 of the accompanying Drawings.
Second, the combination with mills constructed substantially as shewn in
Figures 1, 2, and 3 of ribbed rollers or crackers, or other breaking apparatus,
substantially as and for the purpose herein before described and represented 1
in Figure 4 of the accompanying Drawings.
Third, the combination with mills constructed substantially as shewn in
Figures 1, 2, and 8, and whether m combination with the abbed rollers. or other
breaking apparatus or not, of an incined riddle, substantially as and for the
purpose herein-before described and represented in Figures 4 and 5 of the
accompanying Drawings.
In witness whereof, we, the said Walkden Thompson and Thomas Stather,
Engineers, of Green Lane Foundry, Hull, have hereunto set our hands
and seals, this Eighth day of January, One thousand eight hundied
and sixty-seven.
2
WALKDEN THOMPSON. (L.S.)
THOMAS STATUER
(LS)