IMPROVEMENTS IN APPARATUS FOR DRESSING TURNING AND MOULDING STONE AND THE LIKE
Year: 1882

page_text: LETTERS PATENT to John Dickinson Brunton of Great George Street in the
City of Westminster for an Invention of "IMPROVEMENTS IN APPARATUS
FOR DRESSING TURNING AND MOULDING STONE AND THE LIKE." Partly
a communication by Frank Henry Julius Trier, at present residing at Boston,
United States of America.
PROVISIONAL SPECIFICATION left by the said John Dickinson Brunton
at the Office of the Commissioners of Patents on the 1st February 1882.
"
JOHN DICKINSON BRUNTON of Great George Street in the City of Westminster
"IMPROVEMENTS IN APPARATUS FOR DRESSING TURNING AND MOULDING STONE
AND THE LIKE Partly my own Invention and partly the result of a com-
munication to me by Frank Henry Julius Trier at present residing at Boston
United States America
The said Invention consists firstly in the application of circular rotating cutters
to the planing shaping or turning of stone in such a manner as to cause the edge
of the cutter to shave pare or slice away as distinguished from splitting off or
arroding the portion of stone intended to be removed.
In order to accomplish this the cutter or cutters is or are placed in such a position
with regard to the stone as to form the surface upon which the paring action
takes place in the substance of that part of the stone which it is the object of the
operation to remove :—
The cutter or cutters is or are placed at a greater or less skew to the plane of
motion and as a result of this skew the surface formed by the edge of the cutter
will be more or less concave.
The angle of the chord of the concavity to the resulting adjacent (which may be
called the dressed) surface of the stone may also be varied to suit the requirements
of different classes of work by varying the inclination of the cutter or cutters :-
Where the production of a concave surface by the cutter is the particular object
in view the skew of the cutter or cutters is increased to any extent that may be
necessary and is within practical limits :-
The Invention consists further in mounting a circular rotating cutter or an axis
or arbor carried in a socket (which I call the tool holder) to which an oscillating

page_text: or rocking movement can be imparted so as to give to the cutter the skew necessary
for cutting in either direction by which means a stone can be operated upon when
travelling in both directions. The tool holder is constructed to hold either the
single cutter or the combined cutters herein described
The Invention consists further in mounting a circular cutter on an arbor carried
in an adjustable socket fitted to a slide rest which moves round a circular or
seginental slide which circular or segmental slide has also a compound slide motion
the cutting edge of the cutter being so placed as to be in or near the centre of the
said circular or segmental slide so that the said cutter being adjusted with the
necessary skew can be moved (by the travel of the said slide rest on the segmental
slide) in a circular path to operate upon the stone.
The Invention consists further in employing two or more cutters inclined
towards each other so as mutually to relieve each other, and be able to cut or
shear out a groove. These cutters may or may not be exactly opposite to each
other and may be mounted on the same or different holders.
The Invention further relates to apparatus for turning grindstones:
Firstly in the case of grindstones pierced with a central hole and mounted on a
shaft or spindle for the purpose of being turned :-
On each side of the stone to be turned is placed a frame commonly of wood or
iron in which are fixed V slides or the frames may themselves be the V slides. On
these slides are mounted slide rests carrying circular rotating cutters and by
screws or other well known means there is given to these slide rests a rectilinear
and by preference self acting movement parullel to the sides of the stone and by
means of the circular cutters the two sides of the stone are dressed as it revolves
on its axis.
In order to allow of the more ready placing and removing of the stone the outer
of the two frames is hinged so that it can be swung out of the way. A third
similar cutter is employed mounted on another slide rest having a movement across
the edge or periphery of the stone and while the two cutters already described__
dress the flat sides of the stone this third cutter can be brought into action to
dress or turn the edge of the stone to a true and cylindrical face. The slide in
which this slide rest is carried is also hinged so that it can be thrown back out of
the way for the greater convenience of putting a stone on to its shaft or taking
it off
Secondly in the case of grindstones without a central hole.
The stone to be dressed is placed on a horizontal revolving table and there is
brought down on the centre of the stone so placed a rotateable clamp by which it
is securely held down on the table and will revolve with it. Above the table
there is fixed a horizontal slide carrying a slide rest on which is mounted a circular
cutter and while the stone revolves the cutter is caused to dress the flat surface
thereof. Upon a vertical slide is placed another slide rest carrying a circular
cutter with which the periphery of the stone is turned or dressed. When one side
is dressed the stone is turned over and the other side is dressed in a similar
manner:
Ordinarily it will be found more convenient to turn or dress the edge of the
stone under this arrangement only part way down or across and finish when the
stone is turned over for the second side:-
The Invention relates further to an arrangement of machine adapted for applying
circular cutters to the production of arrises, plane surfaces and straight and curved
moulding
-
The machine is constructed with two or more standards against the face of which
is placed a horizontal slide; which by screws or other suitable means, can be raised
or lowered for adjustment. Upon this horizontal slide is placed a compound
swivelling slide and upon it the rocking tool holder hereinbefore described, or if it
is intended to use the machine also for mouldings, a simple slide on which is placed
the circular or segmental slide herein before described and upon it either a simple or
a compound swivelling slide carrying the rocking tool holder :-

page_text: It is preferred to move the stone to and fro rather than the cutters. For this
purpose the stone is placed on a table moving on slides and having also wheels on
which it may travel when out of the machine for convenience of transport.―
The table receives a reciprocating motion by toothed gear or any other convenient
means:
In order to produce curved mouldings or surfaces there is placed on the ordinary
table of the machine which receives a rectilinear motion only a second table which
though carried forward by the lower table as it moves to and fro is free to slide
about upon it, and to receive a motion curvilinear, or diagonal to that of the lower
table
To produce surfaces or mouldings which shall be arcs of circles this upper table
is attached by means of an arm, or by links or radius rods to a fixed centre, and
thereby constitute it a species of sector. The reciprocating movement commu-
nicated to it by the lower table will thus be converted into a circular movement
round the fixed centre, and the stone fixed upon this upper table will be dressed or
shaped in form of an arc.
The distance of the fixed centre from the upper table is varied so as to produce
curves of varying radius; and means are or may be provided for changing the
position of the fixed centre at any desired point in the arc so as to continue the
curve at a greater or less radius. Also similar links, arms or radius rods are or may
be placed on the other side of the table and means may be provided for the dis-
engagement of the radius rods or other attachment on one side and for simultaneous
engagement of those on the other side by the combined operation of which an
S formed curve will be produced

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Dickinson Brunton in the Great Seal Patent Office on the
26th July 1882.
JOHN DICKINSON BRUNTON of Great George Street in the City of Westminster
"IMPROVEMENTS IN APPARATUS FOR DRESSING TURNING AND MOULDING STONE
AND THE LIKE." Partly my own Invention and partly the result of a com-
munication to me by Frank Henry Julius Trier at present residing at Boston
United States of America.
The said Invention consists firstly in the application of circular rotating cutters
to the planing shaping or turning of stone in such a manner as to cause the edge
of the cutter to shave pare or slice away as distinguished from splitting off or
arroding the portion of stone intended to be removed-In order to accomplish this
the cutter or cutters is or are placed in such a position with regard to the stone as
to form the surface upon which the paring action takes place in the substance of
The
that part of the stone which it is the object of the operation to remove.
cutter or cutters is or are placed at a greater or less skew to the plane of motion
and as a result of this skew the surface formed by the edge of the cutter will be
more or less concave. The angle of the chord of the concavity to the resulting
adjacent (which may be called the dressed) surface of the stone may also be varied
to suit the requirements of different classes of work by varying the inclination of
the cutter or cutters-Where the production of a concave surface by the cutter is
the particular object in view the skew of the cutter or cutters is increased to any
extent that may be necessary and is within practical-limits.
The Invention consists further in mounting a circular rotating cutter on an axis
or arbor carried in a socket (which I call the tool holder) to which an oscillating or
rocking movement can be imparted so as to give to the cutter the skew necessary
for cutting in either direction by which means a stone can be operated upon when
travelling in both directions-The tool holder is constructed to hold either the
single cutter or the combined cutters hereinafter described.
The Invention consists further in mounting a circular cutter or an arbor carried
in an adjustable socket fitted to a slide rest which moves round a circular or seg-
mental slide which circular or segmental slide has also a compound slide motion the
cutting edge of the cutter being so placed as to be in or near the centro of the said
circular or segmental slide so that the said cutter being adjusted with the necessary
skew can be moved (by the travel of the said slide rest on the segmental slide) in
circular path to operate upon the stone.
The Invention consists further in employing two or more cutters inclined towards
each other so as mutually to relieve each other and be able to cut or shear out a
groove. These cutters may or may not be exactly opposite to each other and may
be mounted on the same or different holders.
The machine for applying circular cutters to the production of arrises, plane
surfaces and straight and curved moulding is or may be constructed with two or
more standards against the face of which is placed a horizontal slide, which, by
screws, or other suitable means can be raised or lowered for adjustment. Upou
this horizontal slide is placed a compound swivelling slide, and upon it the rocking
tool holder hereinbefore described, or, if it is intended to use the machine also for
mouldings, a simple slide in which is placed the circular or segmental slide
herein before described, and upon it either a simple, or a compound swivelling slide
carrying the rocking tool holder. It is preferred to move the stone to and fro
rather than the cutters.
For this purpose the stone is placed on a table moving on slides and having also

page_text: wheels on which it may travel when out of the machine for convenience of transport
or the table may be provided with wheels only, running on suitable rails Tho
table receives a reciprocating motion by toothed gear or any other convenient
means.
In order to produce curved mouldings or surfaces there is placed on the ordinary
table of the machine which receives a rectilinear motion only, a second table,
which, though carried forward by the lower table as it moves to and fro, is free to
slide about upon it, and to receive a motion curvilinear or diagonal to that of the
lower table.
To produce surfaces or mouldings which shall bo ares of circles this upper table
is attached by means of an arm, or by links, or radius rods to a fixed centre, and
thereby constitute it a species of sector.
The reciprocating movement communicated to it by the lower table will thus be
converted into a circular movement round the fixed centre, and the stono, fixed
upon this upper table will be dressed or shaped in the form of an arc.
The distance of the fixed centro from the upper table is varied so as to produce
curves of varying radius, and incans are or may be provided for changing the
position of the fixed centre at any desired point in the arc, so as to continue the
curve at a greater or less radius. Also similar links, arms or radius rods are or
may be placed on the other side of the table, and means may be provided for the
disengagement of the radius rods or other attachment on one side and for a
simultaneous engagement of those on the other side by the combined operation of
which ar S forined curve will be produced.
The Invention further relates to apparatus for turning grindstones. On each
side of the stone to be turned is placed a frame commonly of wood or iron in which
are fixed slides or the frames may themselves be the V slides On theso slides
aro mounted slide rests carrying circular rotating cutters-and by screws or other
well known means there is given to these slido rests a rectilinear and by preference
self acting movement parallel to the sides of the stone-and by means of the
circular cutters the two sides of the stone are dressed as it revolves on its axis.
In order to allow of the more ready placing and removing of the stone the outer
of the two frames is hinged so that it can be swung out of the way. A third
similar cutter is employed mounted on another slide rest having a movement
across the edge or periphery of the stone and while the two cutters already
described dress the flat sides of the stone this third cutter can be brought into
action to dress or turn the edge of the stone to a true and cylindrical face. The
slide in which this slide rest is carried is also hinged so that it can be thrown back
out of the way for the greater convenience of putting a stone on to its shaft or
taking it off.
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 in the annexed Sheets of Drawings.
Figures 1 and 2 are views at right angles to each other of a circular rotating
cutter arranged in such a manner as to cause the edge of the cutter to shave pare
or slice away as distinguished from splitting off or arroding the portion of stone
intended to be removed.
In order to accomplish this the cutter (or both or all of the cutters where two
or more are used) is or are placed in the position relatively with the surface of the
stone or the like to be operated upon as to form the surface upon which the paring
action of the cutter or cutters takes place in the substance of that part of the stone
which it is the object of the operation to remove, videlicet, that marked in the
said Figures 1 and 2.
The surface formed by the edge of the cutter will be more or less concave
according to the "skew" to the plane of motion to which the cutter is adjusted.
The angle of the cut to the resulting dressed surface (y in the said Figures),
will be in accordance with the degree of inclination to which the cutter is
adjusted. The tool or cutter will be held in a holder and will be adjustable

page_text: therein to alter the "skew" or the inclination by means essentially resembling
those herein described for a like purpose. Figure 3 represents a cutter arranged
with a "skew" according to this part of the Invention for cutting a circular
moulding A represents the stone to be turned which is supported on suitable
lathe centres one of which is shewn at B. The circular cutter C is fixed by means
of the bolt D to a hollow spindle E which is supported so as to be free to revolve
in the holder F which is provided with a cylindrical stem or support G working in
a socket G¹ in such a manner as to enable the holder F and cutter C to be turned
bodily upon the said stem or support. The object of this arrangement is to enable
the cutter to be readily placed at such an angle to the stone as shall produce the
concave surface desired The socket G' in which the stem G works and which
forms part of an ordinary slide rest is also capable of travelling in any required
direction in order to enable the cutter to be fed forwards in the usual manner and
to be brought to work on any part of the stone. The stone A revolves in the
direction of the arrow a marked thereon in the Drawing and the cutter C is thereby
caused to revolve in the direction indicated by the arrow b. The round or cylin-
drical stem G of the cutter holder F being capable of rotating in its supporting
socket Gas herein before described enables the cutter to be adjusted in such a
manner as to cause the edge of the said cutter to be presented to the stone at the
most favorable angle for producing the required Concave surface as shown in the
Drawing it being fixed in the position to which it has been brought by the set
srcew g
This arrangement of cutter holder or support is also applicable to cutting or
shaping stone in other than turning operations. Such for example, as forming
straight or curved mouldings as illustrated in diagram in Figure 4. Figure 5
represents an arrangement according to the first and a further part of the Invention
for performing the operations of cutting grooves forming internal angles or internal
parts of mouldings and of roughing out as applied to turning.
A represents the stone to be operated upon which is mounted on suitable lathe
centres one of which is shown at B Two Circular cutters C are carried upon
spindles D so as to be free to turn thereon and are arranged in such a manner as
to revolve in planes inclined to one another and also forming an angle with the
axis or with the original surface of the stone. The spindles D are carried by a
holder E capable of being moved so as to hold the cutters up to the work in a
manner similar to that herein before described and a scraper d is provided between
the cutters for the purpose of preventing the edges from becoming clogged or a jet
of water or blast of air can be employed for the same purpose. The stone A
revolves in the direction of the arrow marked thereon in the Drawing and the
cutters C are thereby caused to revolve in the opposite direction and split or shear
off the portion of stone situated between them By their combined action the
cutters inutually assist each other in this operation and any undue breaking away
of the surface of the stone is thereby prevented whilst a clean cut groove or
V shaped recess is produced with great facility. The cutters may be adjustable as
hereinafter described.
Figures 6 and 7 show in elevation at right angles to each other another arrange-
ment according the said Invention. Figure 8 is a general diagramatic view of
the arrangement of the machine. A and B represent an arrangement of Double
slides worked respectively in directions at right angles to each other by handles at
a and b the handle at a operating the worm a' and worm wheel a³ carried in the
nut a' and causing the longitudinal movement of the slide A along the screw u³
and guides on the bed u-The haud wheel b operates the screw and causes it by
travelling in the nut b³ xed to the slide A to move the slide B iu the said slide A.
On the slide B is cast the segment of a ring S which forms a guide to and
attachment for the circular segmental slide C. In order to increase the length of
this slide C in either direction it can move on the segment S and can be clamped
in its adjusted position by means of screws 8 8. The segment D slides on the
slide C and is moved by means of the worm W held between ears w³ cast upon the

page_text: segment D the said worm W gearing with the worm rack W₁ The segment D
carries cheeks E E between which the tool holder F can rock on trunnions T T.
This Toolholder F is a hollow cylindrical piece split at its lower end being there
provided with a clamping screw f for tightening it upon the toolholder stem G
which can be moved up and down in F by means of the screw H which is attached
to the stem G in such a manner that the said stem G can be turned round on its
axis without affecting the screw H this attachment is shewn clearly in dotted
lines in Figure 6 The stem G can terminate in a variety of ways according to the
form of the tools employed Examples are shewn in Figures 5, 9. 10 and 11.
The double tools shown in Figure 6 (in which cone cutters are shewn) are placed
close together for cutting out or finishing angles after the manner describe i with
reference to the arrangement Figure 5. A scraper or jet of water or blast of air
should be used to clear the interval between the tools as described with regard to
the said figure 5, By bringing the acting parts of the Cutters nearer to or further
from the centre of the segmental slide C the circular members of mouldings of any
radius for which the machine is adapted may be produced by movement of the
segment D round about the segmental slide C. This is illustrated by Figures 6
and 9 where will be the centre both of the desired moulding and of the segmental
slide C. The dot and pick lines ³ ³ are the radii of segmental slides forming ares
of circles of different diameters with which the machine may be provided
Figure 11 shows a modification of the stock or stem G carrying the double cutters-
this Figure also showing a plan of the holder g' It is furnished with two moveable
cutter holders g¹g² each consisting of two slide checks and a cross piece which
carries the trunnion d. The long bolt holes in both the stock and tho cheeks of
the holders permit of the said holders being adjusted to a variety of angles and
distances relatively to each other so as to suit the work to be done thereby and
also to bring together the edges of the cutters when they are diminished in diameter
by wear. If it be desired that the Cutters be not exactly opposite to one another
the trunnions & may have a position to one side of the central line x y One cheek
of each of the Cutter holders is formed as shown at g¹ and one cheek of each Cutter
is formed as shewn at g' Tho upper bolts a a pass through both cheeks in the
case of both g' g³ but the lower bolts bb hold only by one cheek of each Cutter
holder and the heads of these bolts b b are sunk in a square recess c formed in the
stock In this form of Holder the Cutter runs freely on the trunnion d and is held
in place by the screw and washer e one cutter only being shown in place in the
Drawing.
-
Again referring to Figures 6 and 7 the rocking action takes place both ways to
allow cutting on the backward and forward movement of the stone and is limited
by means of projections P P on the holder F which rock, between stops p p on the
checks E E. A method is shewn of giving the cutters this rocking motion
automatically One of the cheeks E has two projections which carry the
rollers R R which can turn in direction round the centres K K. A cord is passed
over the rollers and is fixed to one of the projections P at m. The said cord
passes twice round a pulley M which can slide to and fro on an over head shaft Q
to follow the motion of D the weight w keeping the cord tight the rollers R K
will always remain perpendicular and the pulley M will follow the movement of
the segment D. By giving the shaft Q first a turn one way and then the other by
any convenient means connected with the hackward and forward motions of the
table the desired rocking can be obtained alternately bringing the holder into the
positions indicated by the dotted centre lines passing through T in Figure 7. The
edges of the Cutters are shewn in Figures 6 at the centre of the segment c but
can be drawn back out of the said centre and their cutting edges be caused to
describe a circle of any required radius to operate upon work of any diameter
which the machine will accommodate.
Figure 9 shews a single cutter attached to the stem G especially suitable for
Granite and the working of similar stones The Cutter can be brought into the
position indicated by the dotted lines at P' by turning the stem through 180°

page_text: The said Cutter is shewn drawn back out of the centre z of the segmental slide C.
ns before mentioned and as describing a circle whilst splitting off the stone.
Figure 10 shews a Cutter with its plane passing through the axis of the stem G.
A partial rotation of 180° of the stem in the tool holder will bring the Cutter into
the position indicated by the dotted lines and by partially turning the stem G
the Cutter can be brought into such a position that its edge shall produce any
desired concave hollow of a moulding for example as illustrated in Figure 4.
Figures 13 and 14 show another form of attachment of the tool for the double
slide The stem G of the tool holder is in a corresponding bearing in the socket X
and can be taken out and placed in the socket X¹ to operate in another direction
upon the stone. The cutter can move round in a circle on the swivel plate as the
toolholder of an ordinary planing machine Z Z are the screws for attaching to the
machine. Instead of rocking the Cutter (as in Figures 6 and 7 to produce the
tilt it is produced by a turn cither way round the axis G which terminates in a
square which carries the plate J which has two or more notches N (sec Figure 14)
so that it can turn within certain limits the pin K2 acting as a stop. It will be
readily understood that this motion can easily be made automatic by any suitable
device from a convenient part of the machino By shifting the plate J through 90°
50 as to bring the other notch N opposite the pin K the cutter can be brought into
the position indicated at P2 When in the position P' its plane is in the direction
of the movement of the table but in the position P2 it works at right angles to the
movement of table and in this latter position would serve to square or mould the
end of the stone. In this latter case the stone will be stationary and the cutter
will move backwards and forwards.
Two toolholders can be mounted on the cross slide U so as to operate at the
same time on two sides of a stone.
Figure 15 represents in elevation and Figure 16 in plan an arrangement of table
which I add to the moulding machine as arranged for the production of straight
mouldings or arrises in order to produce curved mouldings or arrises. I place on
the ordinary table B an upper table A I fix upon this table B'a pin a and in the
underside of the table A is a slot a² extending nearly all across it the said slot
being fitted to the pin a Thus as the table B moves longitudinally the table A is
carried forward to and fro thereby-but is free to slide about upon it To tho
side of the table A I attach a bar or radius rod C having a slot c³ along a great
part of its length I fit to this slot c² a pin b which can be fixed at any point
of the slot c. by the binding nut c screwing on the said pin b. The said pin b
enters into a hole in the sliding piece Around the pin 6 as a pivot the table A
will turn when carried to and fro by the lower table B and a stone fixed on the
said table A will be formed into a curved face or moulding by the action upon it
of the cutter or cutters arranged and mounted essentially as already described with
regard to the cutter or cutters for straight mouldings By means of the screw d
the sliding piece e can be adjusted so as to vary the distance of the pin b from the
table A and thus obtain any desired radius of curve in the moulding produced by
the machine. By arranging a similar radius rod at the other side and providing
any convenient means of disengaging the attachment on one side or the other and
engaging the other by the action of the two one after the other an S form of curvo
may be produced There may be guides provided for the tablo B at a position as
at x in Figure 16 so that the said table may be placed thereon and thus be brought
nearer to the centre pin b for the purpose of producing curves of a radius smaller
than can be produced otherwise. The slot is long enough to permit of the radius
rod C being moved back over the pin b when this position on x is adopted
Figure 17 represents in elevation Figure 18 in plan and Figure 19 in end view
a machine for turning circular slabs or discs of stone such as grindstones Figures
20 to 23 are details as hereinafter described. .
A represents the stone being turned It is placed on the projecting extremity of
the shaft H and fixed thereon by clamping plates g g and the nuth The framing
of the machine consists of side beams GG¹ and end pieces I 1' the front beam G

page_text: being moveable for the purpose of inserting and removing the stone When the
said beam is in place it rests on the end beans I I¹ as shewn and is held in place
by nuts or cotters on the ends of the bolts f At one end of the framing is fixed
by bolts or screws a bed bed plate J with lugs which carry the shaft c having
thereon worms & engaging with worm wheels a a upon the ends of the screws
These screws being respectively carried by beds E E bolted at one end to the side
beams and at the other end to the plate J The holes on the plate for the bolts
securing the bed E are slotted to allow of the position of the said bed being
adjusted to suit different thicknesses of stone. In each bed E E' are V grooves in
which the tool holders B B move longitudinally the said tool holders running upon
the screws bb The bed E is hinged by the lug n to the shaft o so that when the
bolts by which it is fixed to the bed plate J and the frame G are removed the said
bed can be swung up and out of the way during the removal or insertion of a
stone The shaft H is driven by any suitable motor and from this shaft by means
of the band pulley thereon, the band D, and the fast band pulley on the shaft c,
motion, is through the worms & gearing with the wheels a, given to the screws b, to
give the requisite lougitudinal traverse to the cutter holders B.
For the purpose of turning the periphery of the stone a toolholder and tool is
arranged to traverse across the other end of the frame, the said holder running on
the screw and in V grooves carried by the slide bed L, which bed is adjusted in
grooves in the double bod piece F, nearer to or further from the centre of the
Machine, to suit stones of various diameters This double bedpiece F has lugs V
which are hinged upon a rod e supported by eyes t fixed to the bed so that the
said bed piece F may be turned upon this hinge to be out of the way during the
removal or insertion of a stone The said bedpieco F is secured to the frame by
bolts sa in the frame having ordinary or fly nuts, the washers & thereof being
elongated, and the bolts passing through corresponding holes in the said bed F so
that on slacking the nuts, the washers 8¹ can be turned into a position with their
length in line with the length of the holes, to allow the bedpiece F to be readily
raised when required. Figure 20 is a transverse section of one side of the framing
with one of the sides of the bed picce F
Figure 21 represents in longitudinal section, Figure 22 in end elevation, and
Figure 23 in plan, one of the tools or cutters, and its holder which I prefer to use.
The cutter (or cutters) m is or are firmly fixed to the cylinder N by means of the
bolt P and nuts Q. The said cylinder N is capable of freely turning in the tubular
piece R, which is capable of adjustment longitudinally in the holder or socket T by
ineans of the screw O
This socket T is capable of turning on a vertical axis or gudgeon, which takes
into the circular recess at U and is upon the part of the holder which runs upon
the screws bor Figure 18. Bolts W taking into curved slots in this last
mentioned part secure the part T in the position to which it has been brought.
Thus by this means the cutter m can be set at any angle with the face of tho
stone, whilst by means of the screw O the depth of cut can be readily adjusted.
Having now described and particularly ascertained the nature of the said Inven-
tion 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 hereinbefore in part
recited Letters Patent is
First The use in machines for dressing turning or moulding stone and the like
of a cutter or cutters so arranged or skewed as to dress the stone or the like by
paring away or slicing off the portion to be removed the said cutter or cutters
making their cut or forming the surface upon which the paring or slicing action
takes place in the portion of the stone or the like which it is the object of the
operation to remove substantially as described with reference to Figures 1. 2. 3. 4
and 5 of the accompanying Drawings
Second. The combination of two revolving cutters arranged opposite to or
nearly opposite to and at an angle with each other and to the surface of the stone

page_text: or the like substantially as and for the purpose hereinbefore described with
reference to Figures 5. 6 and 11 of the accompanying Drawings
Third The machine for cutting and shaping or moulding Stone and the like in
a curved direction constructed or arranged substantially as hereinbefore described
and illustrated in Figures 6. 7 and 8 of the accompanying Drawings.
Fourth-The arrangement of holder of the cutter or cutters and means for
traversing it substantially as herein before described and illustrated in Figures 6. 7
and 8 of the accompanying Drawings.
Fifth-Mounting a circular rotating cutter or cutters on an axis or arbor carried
in a socket to which an oscillating rocking movement can be imparted to give the
cutter or cutters the requisite skew for cutting whilst the Stone or the like is
travelling in either direction substantially as hereinbefore described with reference
to the accompanying Drawings
Sixth The arrangement for rocking the cutter or cutters for the Cut in both
directions substantially as herein before described and illustrated in Figures 6, and 7
of the accompanying Drawings.
Seventh. The combination in machines for cutting or dressing stone and the like
into curved mouldings or forms of the arrangement substantially as hereinbefore
described with reference to Figures 15 and 16 of the accompanying Drawings
whether one or two radius rods be used and whether or not there be combined
therewith the extra track x
Eighth The machine for turning or dressing grindstones or other discs or circular
slabs of stone and the like the said machine being constructed or arranged sub-
stantially as hereinbefore described and illustrated in Figures 17. 18 and 19 of the
accompanying Drawings whether constructed to act on the side or sides only or
both on the side or sides and on the periphery of the said stone or the like.
Ninth In machines for turning or dressing grindstones or other discs or circular
slabs of stone and the like arranging the parts of the machine so that they can be
readily turned out of position for the removal and insertion of the stone or the
like to be operated upon substantially as herein before described and illustrated in
Figures 17. 18 and 19 of the accompanying Drawings
Tenth. In machines for turning or dressing grindstones or other discs or circular
slabs of stone and the like the means substantially as herein before described and
illustrated in Figures 17. 18 and 19 of the accompanying Drawings for adjusting
the cutter or cutters to the size of the stone or the like to be cut or dressed.
In witness whereof I the said John Dickinson Brunton have to this my
Specification set my hand and seal the Seventeenth day of July One
thousand eight hundred and eighty two.
START RIAHINTAAN PATUMANT