IMPROVEMENTS IN MILLSTONES AND IN THE METHOD OF MOUNTING AND ADJUSTING MILLSTONES FOR GRINDING COPROLITES, CEMENT, AND OTHER SUBSTANCES, SUCH IMPROVEMENTS BEING ALSO MA MISONES HAD GRINDING GRAIN
Year: 1871

page_text: LETTERS PATENT to Robert Patterson and Sutton Patterson, both
of the Borough and County of Newcastle-upon-Tyne, Millstone
Manufacturers, for the Invention of "IMPROVEMENTS IN MILLSTONES
AND IN THE METHOD OF MOUNTING AND ADJUSTING MILLSTONES FOR GRINDING
COPROLITES, CEMENT, AND OTHER SUBSTANCES, SUCH IMPROVEMENTS BEING ALSO
MA
MISONES HAD GRINDING GRAIN "
PROVISIONAL SPECIFICATION left by the said Robert Patterson and
Sutton Patterson at the Office of the Commissioners of Patents,
with their Petition, on the 6th September 1871.
WC, ROBERT PATTERSON and SUTTON PATTERSON, both of the Borough
and County of Newcastle-upon-Tyne, Millstone Manufacturers, do hereby.
declare the nature of the said Invention for "IMPROVEMENTS IN MILLSTONES
AND IN THE METHOD OF MOUNTING AND ADJUSTING MILLSTONES FOR GRINDING
COPROLITES, CEMENT, AND OTHER SUBSTANCES, SUCH IMPROVEMENTS BEING ALSO'
APPLICABLE TO MILLSTONES FOR GRINDING GRAIN," to be as follows:-
This Invention relates to improvements in the formation of mill-
stones and the means of adjusting the grinding surfaces, being more

page_text: particularly applicable to millstones for grinding coprolites or cement,
where the surfaces of the stones are rapidly worn away, and where
the labour of adjusting them is necessarily very great. For this purpose
the lower stone is formed with a circular recess for the insertion of
a number of rings, which rest upon a set-off reducing the orifice through
the stone. These rings are for the purpose of adjusting the central
bush, the whole being secured by bolts connecting the bush and a
metal ring below the orifice and bearing against the under surface
of the stone. The driver and suspender of the upper stone are likewise
rendered adjustable by means of packing picces secured by bolts, which
connect the suspender with nut boxes let into the upper surface of the
upper or running stone.
When the stones wear they can be readily adjusted to any extent
by taking out one or more of the rings in the eye of the lower stone,
or the packing pieces in the upper stone, or by substituting others
of different thicknesses.
<SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Robert Patterson and Sutton Patterson in the
Great Seal Patent Office on the 6th March 1872.
$
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, ROBERT
PATTERSON and SUTTON PATTERSON, both of the Borough and County
of Newcastle-upon-Tyne, Millstone Manufacturers, send greeting.
.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Sixth day of September, in the year
of 'our Lord One thousand eight hundred and seventy-one, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto us, the said Robert Patterson and Sutton Patterson,
Her special licence that we, the said Robert Patterson and Sutton
Patterson, our executors, dministrators, and assigns, or such others as
we, the said Robert Patterson and Sutton Patterson, our exccutors,
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 IN
.

page_text: MILLSTONES AND IN THE METHOD OF MOUNTING AND ADJUSTING MILLSTONES FOR
GRINDING COPROLITES, CEMENT, AND OTHER SUBSTANCES, SUCH IMPROVEMENTS BEING
ALSO APPLICABLE TO MILLSTONES FOR GRINDING GRAIN," upon the condition
(amongst others) that we, the said Robert Patterson and Sutton
Patterson, our executors or administrators, by an instrument in writing
under our or their hands and seals, or under the hand and seal of one of
us or them, 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 Robert Patterson, on behalf of
myself and the said Sutton Patterson, 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 state-
ment thereof, that is to say:
i
This Invention relates to improvements in the formation of mill-
stones and the means of adjusting the grinding surfaces, being more
particularly applicable to millstones for grinding coprolites or cement,
where the surfaces of the stones are rapidly worn away, and where
the labour of adjusting them is necessarily very great.
And in order that our Invention may be clearly understood and
readily carried into practice we will proceed to describe the Drawing
hereunto annexed, which shows several views of a pair of millstones
and parts connected therewith mounted and arranged in accordance
with our improvements, and as the nature of each of the Figures is
written thereon it will not be necessary to repeat the same.
The lower stone G is formed with a circular recess G¹ for the insertion
of a number of rings D, which rest upon a set-off D¹, reducing the
orifice G through the stone. The rings D are for the purpose of
adjusting the central bush D², the whole being secured by screw bolts E
connecting the bush D³ and the metal ring A below the orifice G', and
bearing against the under surface of the lower stone G. The driver
and suspender S of the upper stone G* are likewise rendered adjustable
by means of packing pieces C secured by screw bolts F, which connect
the suspender S with nut boxes B let into the upper surface of the
upper or running stone G*.

page_text: .
.
When the grinding surfaces of millstones (formed and mounted as
previously described) wear away they can be readily adjusted to any
extent by taking out one or more of the rings D in the eye of the lower
stone, or one or more of the packing pieces C let into the upper stone,
or by substituting others of different thicknesses; the screw thread upon
the bolts E and F being of suitable extent to admit of any reduction
in the thickness of the stones, as will be readily understood on examining
the Drawings.
Having thus described the nature of our Invention, and the manner
of carrying the same into practice, we would have it understood that
we do not confine ourselves to the exact details herein-before described
and shown in the Drawings, but what we claim is, the improved
formation of millstones whereby the wearing surfaces can be adjusted
to one another from time to time as required, substantially in the
manner herein-before described.
.
We also claim the method of mounting and adjusting millstones
substantially in the manner and for the purposes herein-before described
and shown in the Drawings hereunto annexed.
"
In witness whereof, I, the said Robert Patterson, have hereunto set
my hand and scal, this Second day of March, in the year of our
Lord One thousand eight hundred and seventy-two.
ROBERT PATTERSON ༼G.ས༽
J