IMPROVEMENTS IN GRINDING MILLS FOR REDUCING WOOD TO PAPER PULP, AND FOR OTHER GENERAL GRINDING PURPOSES
Year: 1880

page_text: LETTERS PATENT to William Morgan-Brown, of the Firm of Brandon and
Morgan-Brown, Engineers and Patent Agents, of 38, Southampton Buildings,
London, and 1, Rue Laffitte, Paris, for an Invention of "IMPROVEMENTS IN
GRINDING MILLS FOR REDUCING WOOD TO PAPER PULP, AND FOR OTHER
GENERAL GRINDING PURPOSES." A communication from abroad by George
King, of Oswego, New York, United States of America, Manufacturer.
PROVISIONAL SPECIFICATION left by the said William Morgan-Brown at
the Office of the Commissioners of Patents on the 10th April 1880.
WILLIAM MORGAN-BROWN, of the Firm of Brandon and Morgan-Brown,
Engineers and Patent Agents, of 38, Southampton Buildings, London, and 1, Ruo
Laffitte, Paris. "IMPROVEMENTS IN GRINDING MILLS FOR REDUCING WOOD TO
PAPER PULP, AND FOR OTHER GENERAL GRINDING PURPOSES." [A communication
from abroad by George King, of Oswego, New York, United States of America,
Manufacturer.]
The object of this Invention is to provide an improved grinding mill for reducing
wood or wood saw-dust to paper pulp, and for other similar purposes for which
such mills are used, as for grain, &c., and it consists in the employment in the
construction of wood pulp grinding mills of grinding stones composed mainly of
emery or corundum, rendered sufficiently adhesive for this purpose by making it
into proper shaped stones in any of the well known ways by which it is mixed
with materials which permit stones so made to be used for either wet or dry
grinding without injury to them, and which are so made as to always present a
sharp grinding face to the work, and the said stones are so arranged in the mill,
and constructed relative thereto, as to constitute a mill for the above named purposes
in which emery alone or corundum forms the contiguous faces between which the
material is ground.
In the Drawing Figure 1 is a side elevation partly in section of a wood pulp mill
fitted with emery stones, showing the manner of their arrangement therein;
Figure 2 is a plan view of one of the stones.
In the Drawing A is the frame; b is a vertical spindle driven by a pulley d,
carrying on its upper end on a suitable frame secured thereto the lower grinding
stone c

page_text: Secured to the top of frame A, as seen, is a cover B, upon the underside of which
or in any other convenient manner is secured in a fixed position over the lower
stone the upper grinding stone e.
Through the centre of cover B a suitable opening is provided, through which the
wood to be ground or other material is fed to the stones, and a suitable discharge
passage for the ground pulp may be provided through cover B near its junction
with frame A.
The emery or corundum grinding stones employed may be made in one piece, or
they may be formed of sections or segments, and when made of pieces the latter
may be secured together in a proper position in the mill, so as to serve the purpose
herein set forth.
The within described improvements provide for wet grinding wood to make
paper pulp without subjecting the ground wood to the action of any oxidizable-
metallic surface, by coming in contact with which the ground wood oftentimes
becomes inconveniently stained, thereby presenting obstacles to successful
bleaching.
And, furthermore, the action upon the wood of a fine grinding face and a sharp
one, such as is provided by the face of an emery or corundum stone, serves to
produce a pulp of a quality much superior to that mode by grinding wood with an
ordinary stone.
The wood is prepared for grinding in the manner above set forth by first rendering
it as fibrous as possible by subjecting it to the action of saws or similar instruments,
to reduce it substantially to the condition of saw dust or approaching that
fiueness.
While the lower stone is running, actuated as above described, or in a similar
way to that, it may be moved to or from the upper stone for the purpose of causing
the mill to grind fine or coarse by turning the screw a on the end of a rod g, which
is pivotted to the outer end of a lever h, upon which rests the step x in which the
lower end of spindle 6 runs.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, and
of an Order of the Lord Chancellor, filed by the said William Morgan-Brown
in the Great Seal Patent Office on the 5th November 1880.
2
WILLIAM MORGAN-BROWN, of the Firm of Brandon and Morgan-Brown,
Engineers and Patent Engineers, of 38, Southampton Buildings, London, and 1, Rue
Laffitte, Paris. IMPROVEMENTS IN GRINDING MILLS FOR REDUCING WOOD TO
PAPER PULP AND FOR OTHER GENERAL GRINDING PURPOSES." A cominunication
from abroad by George King, of Oswego, New York, United States of America,
Manufacturer.
The object of this Invention is to provide an improved grinding mill for reducing
wood or wood saw-dust to paper-pulp, and for other similar purposes for which
such mills are used, as for grain, &c., and it consists in the employment in the
construction of wood-pulp grinding-mills of grinding stones composed mainly of
emery or corrundum, rendered sufficiently adhesive for this purpose by making it
into proper shaped stones in any of the well known ways by which it is mixed
with materials which permit stones so mado to be used for either wet or dry-
grinding without injury to them, and which are so mado as to always present a
sharp grinding face to the work, and the said stones are so arranged in the mill, and
constructed relative thereto, as to constitute a mill for the above named purposes in
which emery alone or corrundum forms the contiguous faces between which the
material is ground.
In the Drawing Figure 1 is a side elevation, partly in section, of a wood-pulp
mill fitted with emery-stones, showing the manner of their arrangement therein;
Figure 2 is a plan-view of one of the stones.
In the Drawing, A is the frame; b is a vertical spindle driven by a pulley d,
carrying on its upper end on a suitable frame secured thereto the lower grinding
stono c.
Secured to the top of frame A, as seon, is a cover B, upon the underside of which
or in any other convenient manner is secured in a fixed position over the lower
stone the upper grinding stone c.
Through the centre of cover B a suitable opening is provided, through which
the wood to be ground or other material is fed to the stones, and a suitable discharge
passage for the ground pulp may be provided through cover B near its junction
with frame A.
The emery or corrundum grinding-stones employed may be made in one piece,
or they may be formed of sections or segments, and when made of pieces the
latter may be secured together in a proper position in the mill, so as to serve the
purpose herein sot forth."
The within described improvements provide for wet-grinding wood to make
paper-pulp without subjecting the ground wood to the action of any oxidizable
metallic surface, by coming in contact with which the ground wood often times
becomes inconveniently stained, thereby presenting obstacles to successful
bleaching.
And, furthermore, the action upon the wood of a fino grinding face and a sharp
one, such as is provided by the face of an emery or corrundum stone, serves to
produco a pulp of a quality much superior to that made by grinding wood with an
ordinary stone.
The wood is prepared for grinding in the manner above set forth by first
rendering it as fibrous as possible by subjecting it to the action of saws or similar
instruments, to reduce it substantially to the condition of saw-dust or approaching
that fineness.
While the lower stone is running, actuated as above described, or in a similar

page_text: way to that, it may be moved to or from the upper stone for the purpose of
causing the mill to grind fine or coarse by turning the screw a on the end of a
rod g, which is pivotted to the outer end of a lever h, upon which rests the step
in which the lower end of spindle b runs.
Having now described and particularly set forth the nature of the said Invention
and the manner of carrying the same into effect, I would have it understood that
what I claim is,-
First. The herein before described improvement in the art of manufacturing
paper-pulp from wood, which consists in first reducing the wood to a coarse fibrous
state by saws or other equivalent instrumentalities, and in subsequently grinding
_said fibrous wood in either a dry or wet state by passing it between emery faced
grinding stones, substantially as set forth.
Second. In a wood-pulp or other grinding mill, the grinding stono c and e,
constructed and arranged to operate together so as to present emery faced grinding
surfaces only to the wood while being ground, substantially as and for the purpose
set forth.
In witness whereof, I, the said William Morgan-Brown, have hereunto set my
hand and seal, this Fifth day of November, in the year of our Lord One
thousand eight hundred and eighty.
WILLIAM MORGAN-BROWN. (L.S.)