IM- PROVED APPARATUS FOR DRESSING STONES TO BE EMPLOYED FOR DECORTICATING GRAIN OR SEEDS
Year: 1870

page_text: LETTERS PATENT to John Henry Johnson, of 47, Lincoln's Inn Fields,
in the County of Middlesex, Gentleman, for the Invention of "IM-
PROVED APPARATUS FOR DRESSING STONES TO BE EMPLOYED FOR DECORTICATING
GRAIN OR SEEDS." -A communication from abroad by Charles Golay,
of Paris, in the Empire of France.
Sealed the 13th December 1870, and dated the 2nd July 1870.
PROVISIONAL SPECIFICATION left by the said John Henry Johnson
at the Office of the Commissioners of Patents, with his Petition, on
the 2nd July 1870.
I, JOHN HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County
of Middlesex, Gentleman, do hereby declare the nature of the said In-
vention for "IMPROVED APPARATUS FOR DRESSING STONES TO BE EMPLOYED
FOR DECORTICATING GRAIN OR SEEDS," a communication from abroad by
Charles Golay, of Paris, in the Empire of France, to be as follows:-
-
This Invention relates to an improved means of dressing the surfaces
of soft stones, such as are usually employed for the hulling or decorti-

page_text: cation of rice and other dry grains or pulse in substitution for the
ordinary hand dressing, which was effected by means of a flat hammer, or
other suitable tool, according to the kind of grain the stones were
required to operate upon; this operation was tedious and required not
only considerable time for its performance, but also great experience on
the part of the operator, and as the stones require to be dressed daily
they had to be stopped working while being dressed, thereby occasioning
delay and loss.
According to this Invention a circular toothed cutter or dressing
tool of tempered steel is employed, by which the dressing operation is
performed in a very short space of time. This cutter is mounted so as
to be capable of adjustment by screws at any required distance from the
stone so as to regulate the depth of cut, and is also made adjustable at
any point of its breadth by means of a pin or stud upon its stem taking
into any one of a series of holes in a bar which extends along its breadth.
By this means the stone on rotating will by friction of contact cause the
cutter also to rotate and make a series of cuts on its periphery to any
required depth and at any desired distances apart.
Another advantage attending the employment of this apparatus is that
the circular form of the stone is maintained, which cannot be insured
by the hand process. Or the cutting tool instead of being operated
by contact with the stone to be dressed may be driven by suitable
gearing.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Henry Johnson in the Great Seal Patent
Office on the 2nd January 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of Middlesex,
Gentleman, send greeting.
WHEREAS Her most Excellent' Majesty Queen Victoria, by Her
Letters Patent, bearing date the Second day of July, in the year of
our Lord One thousand eight hundred and seventy, in the thirty-fourth
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said John Henry Johnson, Her special license
that I, the said John Henry Johnson, my executors, administrators, a

page_text: and assigns, or such others as I, the said John Henry Johnson, my
executors, administrators, or 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 "IMPROVED APPARATUS
FOR DRESSING STONES TO BE. EMPLOYED FOR DECORTICATING GRAIN OR SEEDS,"
a communication to me from abroad by Charles Golay, of Paris, in the
Empire of France, upon the condition (amongst others) that I, the said
John Henry Johnson, my executers or administrators, by an instrument
in writing under my hand and seal, 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 John Henry Johnson, 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, reference being had to the accom-
panying Drawings, and to the letters and figures marked thereon, that is
to say :-
The said Invention relates to an improved means of dressing the
surfaces of soft stones employed for the hulling or decortication of rice
and other dry grains or pulse in substitution for the ordinary hand
dressing, which was effected by means of a flat hammer or other suitable
tool according to the kind of grain the stones were required to operate
upon. This operation was tedious and required not only considerable
time for its performance, but also great experience on the part of the
operator, and as the stones. require to be dressed daily they had to
be stopped working while being dressed, thereby occasioning delay and
loss.
According to this Invention a circular toothed cutter or dressing
tool of tempered steel is employed, by which the dressing operation is
performed in a very short space of time: This cutter is mounted so as
to be capable of adjustment by screws at any required distance from the
stone in order to regulate the depth of cut, and is also made adjustable
at any point of its breadth by means of a pin or stud upon its stem
taking into any one of a series of holes in a bar which extends along its-

page_text: breadth. By this means the stone on rotating will by friction of contact
cause the cutter also to rotate and make a series of cuts on its periphery
to any required depth and at any desired distances apart.
Another advantage attending the employment of this apparatus is
that the circular form of the stone is kept maintained, which cannot be
insured by the hand process. If desired the cutting tool instead of being
operated by contact with the stone to be dressed may be driven by
suitable gearing.
And in order that the said Invention may be fully understood, I
shall now proceed more particularly to describe the same, and for that
purpose shall refer to the several Figures on the annexed Sheet of
Drawings, the same letters of reference indicating corresponding parts in
all the Figures.
Figure 1 of the Drawings represents an elevation of the improved
dressing apparatus applied to a stone and ready for work, and Figure 2
is a corresponding plan of the same.
P
m is the stone to be dressed; B, B, are the two frames of the appa-
ratus, which are connected together by the four vertical tie rods E so as
to form one frame; c is a moveable cap for fixing the apparatus on to
the shaft A by the aid of four bolts b; G, G, are sliding blocks contained
in slots or openings in the frames B and moved or adjusted radially
towards and from the centre of the stone by means of the adjusting
screws V, which are geared together so as to rotate simultaneously by
means of the pitch chain d; e is a bar for maintaining the screws V at
the proper distance apart; v, v, are hand wheels for rotating the
screws V; 9, 9, are strong vertical pillars carried by the sliding blocks G
for the purpose of supporting the tool holder P, of which is the handle;
M is the stone dressing tool attached to the holder P by its axis a; t, t,
are a number of holes made in one of the cross bars 9 for the reception
of a pin which fixes the position of the tool holder, the width of the
range of the holes being equal to the width of the widest stone to be
dressed; m¹ (Figure 3) represents an edge and side view (full size) of a
rotatory stone-dressing tool.detached having its teeth or cuts made in a
transverse direction; m", (Figure 4) is a full sized section of a rotatory
stone-dressing tool detached having its cutting surfaces or edges made
in the direction of its circumference. The machine being placed as
shown in Figure 1 is attached to the shaft A on the two sides of the stone
by means of the cap c and the collar R which maintains the frame

page_text: It is obvious that the same system of dressing with suitable modi-
fications may be applied to a stone which is made to revolve in a
vertical plane, and to conical and other shaped stones, although I have
only illustrated its application to a horizontally revolving stone:
Moreover, the flat faces of cylindrical or circular stones may be dressed
by the aid of a similar arrangement of tool, and the tool itself may
receive a positive rotatory motion which it transmits to the stone;.
revolving in that case freely on its axis.
Having now described and particularly ascertained the nature of the
said Invention, and the manner in which the same is or may be used
or carried into effect, I would observe in conclusion that what I consider
to be novel and original, and therefore claim as the Invention secured
to me by the herein-before in part recited Letters Patent is,-
First. The system or mode of dressing soft millstones by the aid of
a self-acting or mechanically actuated rotatory dressing tool, substantially
as herein-before described.
Second. The application and use of a rotatory dressing tool, whether
receiving a rotatory motion from or imparting a rotatory motion to the
stone upon which it operates, for the purpose of dressing soft millstones,
substantially as herein-before described.
Third. The peculiar combination and arrangement of frames, slides,
adjusting screws and holders in connection with a rotatory tool for
dressing soft millstones, substantially as herein-before described.
In witness wheroof, I, the said John Henry Johnson, have to
this my Specification set my hand and seal, this Second day of
January One thousand eight hundred and seventy-one.
J. HENRY JOHNSON. (L.S.)