Improvements in Machinery or Apparatus for Dividing, Shaping, Working, or Dressing Stone and the like.
Year: 1899

page_text: Date of Application, 10th Apr., 1899
Complete Specification Left, 9th Jan., 1900-Accepted, 9th June, 1900
PROVISIONAL SPECIFICATION.
Improvements in Machinery or Apparatus for Dividing, Shaping,
Working, or Dressing Stone and the like.
I. FARQUHAR MATHESON MCLARTY, of 52, Forsyth Street, Greenock, Scotland,
Mechanical Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention has for its object to provide a machine or apparatus for dividing
shaping working or dressing stone and the like (I will refer to it as stone) with
great facility rapidity and economy in time and labour. My invention is more
especially intended for use for operating with tools or cutters working in accord-
ance with the system described in the Specification of my Application for Letters
Patent No. 4328 of 1898 but it is not limited to that application.
In a machine made in accordance with my invention the tools or cutters can
be carried by holders as described in my said former Specification these being held
in a reciprocating carrier to which rapid reciprocating movement can be imparted
so that the tools act upon the stone carried upon a table which can be traversed
when necessary transversely to the direction of the movement of the tools either
to move the table intermittently to as small an extent as may be desirable to
feed the work as the operation of dressing or facing proceeds or to move the
table rapidly in either direction to bring the work under the tools or remove it
from under them or otherwise move it. Means are also provided by which the
tools or cutters can when required be adjusted vertically either intermittently to
feed the tools or cutters down as the work proceeds for example in dividing stone
or in facing it at the side or sides or rapidly to bring the tools or cutters down to
or up from the point of attack. The invention also includes other details and
improvements connected with machines or apparatus for dividing shaping working
or dressing stone and the like as hereinafter described.
In imparting the reciprocating movement to the tool carrier it is desirable to
check the movement at the end of each stroke so as to prevent as far as possible
shock at the ends of the strokes. This is effected by driving the reciprocating
carrier from any suitable motor by a band or the like passed over fast and loose
pulleys on a vertical shaft carrying a fly-wheel provided with an adjustable crank-
pin which engages in a transverse slot in a cross head supported upon suitable
guides and connected to the reciprocating tool-carrier. Traversing movement can
be given to the table carrying the work to bring the work into position by
means of a pinion gearing with a rack under the said table the said pinion being
driven through worm and other gear. The driving of the said gear by which
the table is traversed is conveniently effected by means of bands passing over an
extension of the loose pulley on the shaft through which the tool carrier is reci-
procated so that when the carrier is stopped by shifting the driving band from
the fast to the loose pulley the traversing movement of the table can be effected
in either direction. To enable this to be done the motion can be conveyed from
the said extension of the loose pulley by open and crossed bands passing over

page_text: pulleys on a countershaft which drives the traversing gear the said pulleys being
arranged with fast pulleys and loose pulleys so disposed that when the bands are
in one position they are both on loose pulleys and consequently the traversing
gear is not operated when they are in another position the cross band is on
one of the fast pulleys, and the open band on a loose pulley and the traversing
gear is driven in one direction, whilst when the said bands are in another
position, the open band is on one of the fast pulleys and the cross band on a
loose pulley and the traversing gear is driven in the reverse direction.
To impart an intermittent traversing movement to the table during the
operation of the machine to feed the work transversely to the tools, or
cutters, at each stroke the traversing gear is operated to move the
table to any
extent desired at each stroke of the tools by means
of cams operated by or from the driving shaft and acting upon pieces con-
nected with rods in such a way that the said rods are moved in reverse directions
and these are connected with grippers which at each alternate stroke of the
rods, grip a wheel carried by the counter shaft by which the traversing gear is
operated. The said wheel has preferably a wedge shaped periphery and the
grippers engage therewith by jaws shaped to wedge and grip upon these so as
to give a positive and certain movement thereto and therefore through the gear'
to the table carrying the work to feed it through the extent required
at each stroke. By making the connections of the rods to the grippers
80 that they can be reversed the traversing of the table can be
effected in either direction. There may be in the line of gear by which this
motion is conveyed to the table change wheels by which the extent of movement
can be altered. The tool carrier can be moved up and down quickly or inter-
mittently to feed the tools to their work (for instance in dividing stone or in
dressing the faces at the side or sides) by arrangements like those described for
traversing the table carrying the work but as the tool carrier reciprocates the pinion
by which movement is conveyed to it is connected to the shaft which drives it
by a groove and feather arrangement so that it travels along the said shaft with
the tool carrier. Water is conveyed to the tools and work so as to clear away
the débris, and for this purpose the outlets for the water are situated close to the
tools and are carried along with the reciprocating tool carrier the water pipes
being telescoped and moveable in glands so that they will move in and out to
accomodate the reciprocating movement of the tool carrier and the vertical move-
ment in feeding, or adjusting the tools. To protect from grit the bearings of
the rollers upon which runs the tables carrying the work, I prefer to cover the
ends of the axles with caps and to provide guards extending from the bearings
and entering grooves made in the sides of the pulleys.
A brake is provided preferably arranged as a ring, or part of a ring, surrounding,
or partly surrounding, the fly-wheel so that it can be moved inwards and made
to embrace the rim of the fly-wheel after the manner of a brake-strap so that if
the said wheel should break it will be retained by the said ring or partial ring.
The tools or cutters and their holders or connections with the carrier can be
arranged as in my said former specification but for certain purposes I may arrange
the tools, or cutters, in the lower edge of a plate which can be set in a horizontal
position or at an angle in either direction and secured by means of bolts and
nuts passed through curved slots to allow of the movements for adjustment. The
said plate may also carry other tools, or cutters, which can be turned out of
action or be turned down or out and fastened in any desired position for action,
for instance for acting on the side, or sides, of the stone after the other tools, or
cutters, have acted, upon the face. To support the stone on the table I prefer
to use grips which can be readily brought into and out of gripping position.
These consist of bracket-pieces which are attached in any suitable position to
the table, and carry holders in which chisel-ended or pointed pieces of steel are
inserted and pinched by making the holders split and pinching them together by
screws. The holders are carried (and can if necessary be made reversible) in

page_text: pieces which can be run in and out by screw-nuts and hand-wheels so that, after
the chisel-ended or pointed pieces of steel are brought up to the stone, and pinched
in the holders, by working the band wheels and screw-nuts, the said pieces of
steel are caused to bite very firmly upon the stone and hold it in position.
In order to reverse the table when it arrives at the end of its traverse, an
arrangement like that of a planing machine reversing movement may be used.
Dated this 10th day of April 1899.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.
Improvements in Machinery or Apparatus for Dividing, Shaping,
Working, or Dressing Stone and the like.
I, FARQUHAR MATHESON MCLARTY, of 52, Forsyth Street, Greenock, Scotland,
Mechanical Engineer, do hereby declare the nature of this invention, and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
--
My invention has for its object to provide a machine, or apparatus with
alternative attachments for dividing, shaping, working. or dressing stone or the
like, (I will refer to it as stone) with great facility, rapidity, and economy in time
and labour. My invention is more especially intended for use for operating with
tools, or cutters, working in accordance with the system described in the Specifica-
tion of my British Patent No. 432898 but it is not limited to that application.
In a machine made in accordance with my invention the tools, or cutters, can
be carried by holders as described in my said former specification these being
held in a reciprocating carrier to which rapid reciprocating movement can be
imparted so that the tools act upon the stone carried upon a table which can be
traversed when necessary, transversely to the direction of the movement of the
tools either to move the table intermittently to as small an extent as may be
desirable to feed the work as the operation of dressing, or facing proceeds; or to
move the table rapidly in either direction to bring the work under the tools, or
remove it from under them, or otherwise move it. Means are also provided by
which the tools, or cutters, can when required be adjusted vertically either inter-
mittently to feed the tools, or cutters, down as the work proceeds; for example
in dividing stone, or in facing it at the side, or sides, or rapidly to bring the
tools, or cutters, down to, or up from the point of attack. The invention also
includes other details and improvements connected with machines, or apparatus,
for dividing, shaping, working, or dressing, stone and the like, as hereinafter
described with reference to the accompanying drawings of which Figures 1 and 1ª
represent in side elevation and Figures 2 and 2 in plan a stone dressing machine
constructed according to my invention and Figure 3 is an end elevation of the
same. Figure 4 is a diagrammatic view of the machine shewing the fluid dis-
tributing arrangement Figures 5 and 6 are a front elevation and a vertical section,
respectively, of a stone clamping device. Figure 7 is an elevation of the tool-
holder bar and cutting tools and Figures 8 and 9 represent in vertical section
A is a base on which the mechanism
and plan respectively the brake mechanism.
is carried the said base being preferably though not necessarily, in the form of
a cross in plan, parts being built up by removeable pieces B so that the size of the
said base can be increased and reduced as required. Bolted to this base are
standards CC and C the standards C C supporting girders D constituting bearers
and guides for a saddle piece E to which the tool holder bar E' is attached, whilst

page_text: the standards C C support girders 1) to which are attached by brackets D²,
girders forming bearers and guides for the rear end of an arm F through
which motion is conveyed to the saddle piece E. Between the standards C* C¹
on each side of the machine are diagonal girders or struts C² which carry bearings
for transverse shafts or rods hereinafter described. The saddle E has rollers a
Figure which run on the girders D and to the said saddle are fixed vertical
plates to the lower ends of which the tool holder bar E is attached the said
saddle also carrying helical wheels c change wheels d and mitre pinions e and f
by which the tools are raised and lowered. The pinion f has a feather which can
slide along a keyway in a shaft or spindle through which spindle and the
gearing feed motion of rotation is imparted to vertical screws f which work
in nuts carried by the slide plates and thus raise or lower the said plates accord-
ing to the direction in which the screws fl are turned. The saddle piece E
also carries part of the mechanism for supplying water to the work, this part
of the mechanism being omitted from the main views of the apparatus to prevent
confusion, the said mechanism being shewn in a separate diagrammatic view of the
apparatus in Figure 4. Reciprocating movements are given to the saddle E by
an adjustable crank pin h carried on a fly-wheel G on the main shaft G¹ which
is mounted in bearings i. This shaft carries a fast pulley H and a loose pulley
or drum H and is driven by a strap H², from any suitable motor passing round
the pulley H. The crank pin h works within a block h¹ which engages and slides
to and fro in a transverse slot 2 in the arm F when the wheel G is rotated; the
said crank pin imparting reciprocating motion to the said arm. The pin and
block are adjustable by means of a screw nearer to or further from the axis of
the wheel G, as required, to vary the stroke of the saddle piece E. The arm F
is provided at 1 with guide blocks (or rollers) which run on the guide or girders D³
and support the principal weight of the said arm. I is the table on which the
stone to be cut or dressed is supported, the said table being mounted on rollers I¹
carried in bearings I on the base A on which rollers the table can be traversed
to and fro to move the stone, carried thereby, into position beneath the cutting
tools. Traversing movement is given to the table I by means of a pinion K
gearing with a rack on the underside of the said table. The said pinion K is
fast on a horizontal shaft K2 mounted in bearings on the base A, on which
shaft is a worm wheel in gear with a worm on a shaft arranged at right
angles to the shaft, in suitable bearings on the base A. On the outer end of
the shaft is a spur pinion in gear with a spur wheel k³ on a stud k³, on
which stud is another pinion in gear with a wheel 8 on a shaft arranged
parallel to the shaft the said gearing kkkk and 18 constituting a system of
change wheels for varying the speed of traverse of the table. The shaft " is
driven by means of mitre wheels 10 from a vertical shaft L on which is fixed a
ratchet wheel with which a pawl (shewn in dotted lines in Figure 2) engages,
the said pawl being carried on an arm or lever loosely mounted on the said
shaft L and operated by a pair of rods carrying tappets which are acted on
by a cam on the shaft G, on which shaft the said cam is free to slide but is
caused to rotate therewith. The cam is timed so as to impart to the table I,
through the gearing hereinbefore described, an intermittent movement at the
completion of each stroke of the saddle E. When a rapid continuous movement
of the table is required instead of short intermittent movements the cam 13 is
slidden along its shaft by means of a handle 4, Figure 3, out of range of the
tappet on the rods and the strap H2 is shifted by means of the strap shifter L'
from the fast pulley H onto the loose pulley or drum H. Passing round an
extension H* of the loose pulley H' and round pulleys m'm³ m² on the shaft L are
straps mm, the strap m being crossed and the strap m being open. The centre
pulley m is fast on the shaft L, whilst the other pulleys m' and m² are loose
thereon and are of greater width than the pulley m. As shewn in the drawings
the strap m³ is on the loose pulley m¹, and the strap m is on
the loose pulley m² SO that, while the straps are in this position,

page_text: the drum H' can be rotated by the band H2 without giving motion to the table I.
The straps mm are engaged by a strap shifter m which can be operated by
means of a lever handle m so as to shift the said straps m³ and m³ in either
direction according to the direction the table I is required to travel, and pass
one or the other of the said straps from the loose pulley m¹ or m², as the case may
be, onto the fast pulley m whereupon motion will be transmitted through the
gearing hereinbefore described, to the shaft K³ and thence through the pinion K
and rack K' to the table I.
Assuming that the work has been brought into position beneath the cutters
the straps mm are shifted onto the loose pulleys m² m² on the shaft L and the
driving strap H² is shifted onto the fixed pulley H to drive the saddle and tool
holder and if the stone is to be cut downwards, the cam which effects the
intermittent movement of the table I, is also moved out of range of the tappets 15
on the rods, so that the table I supporting the stone will remain stationary.
The tool holder bar E is caused to descend intermittently, that is at the end of
each stroke of the saddle E, so as to cause the cutter to cut deeper and deeper
at each succeeding stroke of the said saddle. To effect the intermittent descent
of the tool bar, a cam n similar to the cam 3 is mounted so as to turn with, but
free to slide on the shaft G, the said cam being moved by means of a lever **
into position to act on tappets ¹ mounted on a pair of rods 2 parallel to the
rods, in connection with the table moving mechanism. Each pair of rods (2
and is provided with springs and respectively, which maintain the tappets
and in contact with their respective cams 3 and n. The rods are connected
to a lever mounted loosely on a shaft and carrying a pawl in gear with a
ratchet wheel fast on the said shaft, so that as the main shaft G rotates the
cam n acting on the tappets n¹ causes the pawl at each half rotation of the
shaft G to impart, through the wheel 7, partial rotation to the shaft. Near
the lower end of the shaft is a spur wheel 8 gearing with a pinion on a
stud which carries another spur wheel gearing with a wheel on a short
vertical shaft, this gearing 8 to 12 constituting a system of change wheels.
On the lower end of the shaft 3 is a bevel wheel in gear with a correspond-
ing wheel on a horizontal shaft which also carries another bevel. wheel
in gear with a corresponding wheel 18 on a horizontal shaft arranged at right
angles to the shaft 16. On the shaft 19 is a bevel wheel gearing with a
0
corresponding wheel on the lower end of a vertical shaft on the upper
end of which shaft is a bevel wheel gearing with a similar wheel 2 on the
shaft hereinbefore described through which, and the gearing feed the vertical
screws fare rotated to raise and lower the tool holder bar E. On the shaft »³
are fast and loose pulleys o o* round which passes a driving strap o from the
extension of the loose pulley or drum H' on the shaft G¹. On the shaft is a
hand wheel o2 by which the raising and lowering of the tool holder bar can be
effected by hand, without throwing the arm F out of action, but when it is required
to rapidly raise the said tool holder bar the pulleys H H can be coupled together
and then the strap o be shifted by the strap shifter o³ from the loose pulley
to the fast pulley 0 on the shaft whereby motion will be imparted, through
the gearing herein before described to the vertical screws f¹, and the tool holder
bar E will be raised into position to act on the top of the work on the table 1.
The hand levers and hereinbefore referred to for bringing into position the
cams and are mounted on a study and the said levers are connected by rods
or bars to arms p² on rods or shafts p mounted in hearings carried on the
struts on which shafts are other arms engaging in annular grooves in the
bosses of the cams and so that by means of the levers and either cam
can, as required be brought into position to act on their respective tappets »'.
The cutting tools shewn in the drawings are of the kind described in the Specifica-
tion of my British Patent herein before referred to, and are mounted in holders
adjustably secured to the tool-holder bar E¹ but other kinds of tools may be
employed, according to the material to be acted on, the nature of the work, and

page_text: the speed of working may be regulated as required. In Figure 7 two kinds of
cutters are shewn as being carried by the same tool holder bar E those lettered 2
being surfacing cutters, and those lettered q¹ being grooving or dividing cutters.
The cutters are shewn in clusters mounted to rotate on spindles carried in
plates each of which is centered to a frame 3 supported on screws q carried
by the tool holder bar E' secured to the vertical slidable plates b. The frames g³
are adjustably along the screws q* and fixable in position by nuts q. The plates
are each angularly adjustable on the frame and they can be fixed in their
adjusted position by nuts q screwing onto bolts on the frame ³ which bolts pass
through curved slots g in the plates q. Each cutter q is mounted so as to be
free to rotate on a stud q* on a plate the said plate being adjustably fixed to
the frame by a bolt and nut q the bolt having a dovetail shaped head fitting
a correspondingly shaped groove in the frame so that the plate may by
means of the bolt and nut 79 be fixed in its adjusted position.
The stone to be operated on by the cutters is supported on the table I the
said table being provided on. its upper surface with dovetail grooves in which
are inserted adjustable blocks Figure 1 on which the stone bears. The grooves ¿¹
receive bolts for securing to the table, clamping devices such as
shewn in Figures 5 and 6 on a large scale, for holding the stone
in position. Each clamping device comprises a frame ** in which
is revolvably mounted a screw threaded nut engaging a screw 72 to
which is secured a head or plate carrying split clamping sockets in which
are adjustably secured pointed or chisel ended dogs which are forced into
contact with the stone, or with a plate interposed between the stone and the
points of the dogs, by turning the nut The machine is provided with an
arrangement for supplying water or other fluid to the tools to keep them cool,
and to the stone to drive away debris, the said arrangement being shewn in
Figure 4 and consists of a supply pipe u having a cock u and an air vessel u²
for regulating the flow of the fluid, a relief valve being provided to prevent
the possibility of excessive pressure.
The supply pipe is provided with teles-
copic arrangements to enable the connection between the said pipe and the
tool carrier, and adjacent reciprocating parts, to be constantly maintained through-
out their various positions. The various bearings and parts which would be
liable to injury by grit or other deleterious matter from the stone being operated
on, are protected by deflecting or guard plates which divert the grit and the
like from the said parts, and on the ends of the table I troughs V are provided
into which water supplied to the stone can enter, and be conducted thereby sideways
clear of the machine. Splash boards V₁ of any suitable height may be inserted
in the troughs to prevent fluid splashing from the machine. In addition to the
guards or shield plates arranged over the bearings of the rollers I¹ on which the
table I travels the ends of the axles of these rollers are cach covered by a plate
or cap which are caused by bolts to press bushes in which the axles of the
rollers turn, close against the said rollers, so as to prevent the possibility of grit
gaining access to the bearings. Figures 8 and 9 represent in vertical section and
plan respectively an arrangement for stopping the machine at any part of the
stroke of the tools or cutters, the said arrangement consisting of a trough shaped
band G2 surrounding the fly wheel G the said band being made in two semi-
circular parts having lugs G internally screw threaded with which engage right
and left handed screw threads on shafts G. On each of the shafts G is a bevel
wheel G in gear with a similar wheel G6 on a vertical shaft G7 which shafts may
be rotated by hand by means of a hand wheel G8 mounted on either of the
vertical shafts G7 which shafts are geared together by mitre wheels and horizontal
shaft Go. The band G2 is supported and prevented from rotating by means of
lugs or brackets 14 projecting from or secured to the girders D' and engaging
with projections Gen the exterior of the band G2. The band G2 would in the
event of the fracture or breakage of the wheel G prevent the parts from being
thrown outward by centrifugal force.

page_text: Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed. I declare that what I
claim is:-
1. The general arrangement and combination of parts constituting the machine
for dividing, shaping, working, or dressing stone or the like substantially as
hereinbefore described and illustrated in the accompanying drawings.
2. In machines for dividing shaping, working, or dressing stone, or the like
the combination with a reciprocating tool carrier of means for imparting recipro-
cating motions thereto the said means comprising a shaft carrying a fly wheel
a crank pin on the fly wheel engaging in a transverse slot in an arm movable
in guides and connected to the reciprocating tool carrier substantially as herein-
before described and illustrated in the accompanying drawings.
3. In machines for dividing, shaping, working, or dressing stone or the like
the combination with a work carrying table of means for imparting traversing
movement thereto comprising a main driving shaft, a counter shaft, in operative
connection with the main shaft, a system of change wheels in operative connection
with the counter shaft, a pinion in operative connection with the change wheel,
and a rack on the table engaging with the said pinion substantially as hereinbefore
described and illustrated in the accompanying drawings.
4. In machines for dividing, shaping, working, or dressing stone or the like
the combination with a work-carrying table of means for imparting continuous
forward or backward movement thereto comprising a main driving shaft, a belt
pulley on the said shaft, a counter shaft, fast and loose pulleys thereon, crossed
and open belts on the said pulleys, a shifter for the belts, a system of change
wheels in operative connection with the counter-shaft, a pinion in operative con-
nection with the change wheels, and a rack on the table engaging with the said
pinion substantially as hereinbefore described and illustrated in the accompanying
drawings.
5. In machines for dividing, shaping, working or dressing stone or the like the
combination with a work-carrying table of means for imparting intermittent
movements thereto the said means comprising a main driving shaft, a cam on
the said shaft, tappet mechanism operated by the cam, a counter shaft pawl and
ratchet gear operatively connecting the counter shaft, and the tappet mechanisaan,
a system of change wheels in operative connection with the counter shaft, a pinion
in operative connection with the change wheels, and a rack on the work carrying
table, engaging with the said pinion substantially as hereinbefore described and
illustrated in the accompanying drawings.
6. In machines for dividing, shaping, working or dressing stone or the like the
combination with a work-carrying table, a main shaft and a cam on the shaft for
imparting intermittent movements to the said table of lever mechanism for moving
the cam axially on the shaft into and out of its operative positions, substantially as
hereinbefore described and illustrated in the accompanying drawings.
7. In machines for dividing, shaping, working or dressing stone or the like,
the combination with a reciprocating tool carrier, of means for imparting con-
tinuous vertical movement thereto, the said means comprising a main driving
shaft, a belt pulley on the said shaft, a counter shaft, fast and loose pulleys thereon,
a belt for the said pulleys, a shifter for the belt, a system of change wheels in
operative connection with the counter shaft, and screws engaging with the tool
carrier, the said screws being in operative connection with the change wheels,
substantially as hereinbefore described and illustrated in the accompanying
drawings.
8. In machines for dividing, shaping, working, or dressing stone or the like,
the combination with a reciprocating tool carrier, of means for imparting inter-
mittent vertical movement thereto, the said means comprising a main driving
shaft, a cam on the said shaft, tappet mechanism operated by the said cam, a
counter shaft, pawl, and ratchet gear operatively connecting the counter shaft
and the tappet mechanism, a system of change wheels in operative connection with

page_text: the counter shaft and screws engaging with the tool carrier in operative connection
with the change wheels, substantially as herein before described and illustrated
in the accompanying drawings.
9. In machines for dividing, shaping, working or dressing stone or the like, the
combination with a reciprocating tool carrier, a main shaft and a cam on the
shaft for imparting intermittent movements to the said tool carrier, of lever
mechanism for moving the cam axially on the shaft into and out of its operative
positions, substantially as herein before described and illustrated in the accom-
panying drawings.
10. In machines for dividing, shaping, working, or dressing stone, or the like,
the combination with a reciprocating tool and means for imparting reciprocating
movements thereto, of extensible connections between a source of fluid supply
and the tool, for conducting fluid to the tool in whatever position the tool
may occupy, substantially as hereinbefore described and illustrated in the accom-
panying drawings.
11. In machines for dividing shaping, working, or dressing stone or the like;
the combination with a reciprocating work-carrying table rollers supporting it,
and bearings carrying the rollers, of guard-plates or shields for preventing the
access of grit to the interior of the said bearings substantially as hereinbefore
described and illustrated in the accompanying drawings.
12. In machines for dividing, shaping, working or dressing stone or the like
the combination with the main driving shaft and a fly wheel thereon, of a brake
strap surrounding or partly surrounding the fly-wheel, the said strap being
formed of two relatively adjustable parts and being provided with two operatively
connected right and left-handed screws for moving the parts into and out of
contact with the wheel, substantially as herein before described and illustrated
in the accompanying drawings.
13. In machines for dividing shaping, working, or dressing stone or the like,
the combination with a tool carrier frame and a centering stud thereon, of a tool,
comprising a plate angularly adjustable on the said stud, and devices for securing
the said plate on the tool carrier frame in such adjusted position substantially as
hereinbefore described and illustrated in the accompanying drawings.
14. In machines for dividing, shaping, working or dressing stone or the like
the combination with a tool carrier frame and a vertical guide thereon, of a tool
comprising a plate adjustable in the said guide and a device for securing the said
plate in its adjusted position substantially as hereinbefore described and illus-
trated in the accompanying drawings.
15. In machines for dividing, shaping, working, or dressing stone or the like
the combination with a tool carrier bar and horizontal screws fixed to the said
bar, of a tool carrier frame adjustable on the screws, and clamping nuts for securing
the tool carrier frame in position on the screws substantially as hereinbefore
described and illustrated in the accompanying drawings.
16. In machines for dividing, shaping, working, or dressing stone or the like
the combination with a work table, a gripping device for holding the work on
the table comprising a bracket fixable to the table, a screw threaded nut
revolvable in the bracket, a screw-threaded rod engaged by the nut, a plate or disc
carried by the rod, split sockets on the plate or disc, and chisel ended, or pointed,
studs clamped in the sockets, substantially as hereinbefore described and illus-
trated in the accompanying drawings.
Toted 10
J
P T
1000
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.