MACHINERY FOR SAWING OR DRESSING STONE
Year: 1884

page_text: I, HERBERT JOHN HADDAN, of 67, Strand, in the City of Westminster, Civil
Engineer, do hereby declare the nature of said Invention for "MACHINERY FOR
SAWING OR DRESSING STONE," a communication to me from abroad by Antoine
Jeansaume, Mechanical Engineer, of 264, Boulevard Voltaire, Paris, to be as
follows:-
This invention relates to machinery for sawing, cutting or polishing marble,
granite and other hard stone to a given shape or pattern.
The improved machinery comprises a pair of grooved pulleys, one pulley being
mounted on the driving shaft by means of groove and feather, while the other
pulley is mounted loose on a second shaft parallel to the other.
Over the two pulleys passes a wire of steel, copper or other suitable metal, or a
band or cord of leather or any other suitable material, which cord is guided
between the two pulleys by four rollers placed in pairs right and left of two guides
which serve as patterns for the shape to be cut, and fitting the profile of the pattern
guide.
The cord may be charged with sand, grit or emery either dry or wet, or with
any other suitable substance.
The two pulley axles are connected with each other by a movable frame carrying
four supporting rollers which rest on the endless cord or wire.
If the driving shaft is set in motion, the endless cord slides over the guide rollers
(between the latter and the pattern roller), and acts on the block of stone placed
between the two pattern rollers.
The parts of the cord (forward and return part) situated between the two
pattern rollers are parallel with each other. The pattern rollers and guide rollers
may either turn on their respective axles, or they may be fixed.
The weight of the frame and of the two pulleys, and the pressure of springs
upon the axles of the guide rollers forces the cord to follow the profile of the
pattern rollers, and thus to cut out of the block of stone right and left the shape of
the pattern guides.

page_text: Two or more blocks of stone may be placed in series, and the other sides may be
cut by turning each block at a right angle.
The necessary tension of the cord may be obtained by making one pulley axle
automatically adjustable, and connecting with the frame a counterweight.
For sharpening the teeth of sawing wires, a special appliance is placed behind
the block of stone to be cut, and fixed to the frame of the machine.
This appliance comprises a toothed wheel of hardened steel, set in motion by the
cord which is guided between two pairs of rollers, one in front and one behind the
toothed wheel.
On the axle of the toothed steel wheel (in contact with the cord), is cut a screw
thread gearing into a worm wheel which sets in motion another wheel adapted to
shift the axle of the steel wheel in the direction of its length by means of an
excentric.
To shift the axle in the opposite direction, a spring is applied; another spring
serves to press the steel wheel upon the cord or saw blade. The back of the saw
blade is supported by a steel roller provided with several parallel grooves of different
width, for guiding blades of different width.
Instead of a toothed steel wheel or cutter, an endless screw placed parallel with
the saw blade may be used for cutting or sharpening the teeth; or any other
suitable mechanism may be employed for that purpose.

page_text: Machinery for Sawing or Dressing Stone.
I, HERBERT JOHN HADDAN, of 67 Strand, in the City of Westminster, Civil
Engineer, do hereby declare the nature of said invention for MACHINERY FOR
SAWING OR DRESSING STONE, a communication to me from abroad by Antoine
Jeansaume, of 264 Boulevard Voltaire, Paris, France, Mechanician, and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This invention relates to machinery for sawing, cutting or polishing marble,
granite and other hard stone to a given shape or pattern.
In the following description reference will be made to the accompanying
drawings, in which Fig. 1 is a vertical section and Fig. 2 a plan of a machine
embodying the invention.
The improved machinery comprises a pair of grooved pulleys a a¹, one pulley a
being mounted on the driving shaft g by means of groove and feather, allowing the
pulley to move along the said shaft, while the other pulley a' is loose on a second
shaft g', parallel to the shaft g.
Over the two pulleys passes a wire h, of steel, copper or other suitable metal, or
a band, string or cable of leather or any other suitable material, which band, wire
or other cord is guided between the two pulleys by rollers b 61 61 6111, placed in
pairs right and left of two guides c and c¹, which serve as a pattern for the shape
to be cut and fit the profile of the pattern guides c and c¹. The cord may be
charged with sand, grit, emery, either dry or wet, or with any other suitable
substance.
The axles of the two pulleys a a¹ are connected with each other by a movable
frame d, carrying rollers e e¹ ell ell, which rest on the endless cord or wire h, so
that the latter supports the weight of the frame d.
If the shaft g is set in motion, by the main driving pulley f, the endless cord h
slides over the guide rollers b b (between the latter and the pattern rollers) and
acts on the block of stone k, placed between the two pattern rollers.
The parts of the endless cord h (forward and return part), situated between the
guide rollers 6 and 6111 or b¹ and 611 are parallel with each other. The pattern
rollers and guide rollers may either turn on their respective axles, or they may be
fixed. The weight of the frame d and of the two pulleys a a¹ and the pressure of
springs upon the axles of the guide rollers, forces the cord h to follow exactly the
profile of the pattern rollers c c and thus to cut out of the block of stone k right
and left the shape of the pattern guides c c¹.
The cord is prevented from deviating sideways from the rollers e e², by the guide
rollers 6 61 61 6111, the profile of which is complementary to the profile of the
pattern guides c c, leaving only a small clearance for the passage of the cord. By
this operation the block of stone is dressed or cut on two opposite sides, so that its
cross section corresponds exactly to that of the pattern guides c c¹.
Two or more blocks of stone may be placed in series, so that the cord or band
acts on all of them simultaneously, and the other sides may be cut by turning each
block at a right angle. The necessary tension of the cord may be obtained by

page_text: rendering one pulley axle automatically adjustable as represented by the drawing
and attaching to its movable frame a string z, passing over a guide pulley and
carrying at its free end a heavy weight (not shown in the drawing), which tends to
draw the pulley a¹ away from the pulley a.
For cutting or sharpening the teeth of the sawing wire a, a special appliance is
placed behind the block of stone to be cut, and is fixed to the frame of the
machine. Fig. 3 shews' such an appliance in elevation and Fig. 4 the same in
plan.
This appliance comprises a toothed wheel of hardened steel, serving to cut the
teeth of the saw, and set in motion by the cord or sawing blade n, which is guided
between two pairs of rollers m m¹ m¹ m¹¹¹, one in front and one behind the wheel l.
On the axle of the wheel l, in contact with the cord, is cut a screw thread o, gearing
into a worm wheel p, which sets in motion another wheel q adapted to shift the
axle of the steel-cutter Z in the direction of its length by means of an eccentric r.
To shift the axle in the opposite direction, a springs is applied; another spring t
serves to press the cutting wheel Z upon the cord-or saw blade n. The back of
the saw blade n is supported by a guide roller w, provided with several parallel
grooves of different width, for guiding blades of different widths.
Instead of a toothed steel-wheel or cutter, an endless screw placed parallel with
the saw-blade may be used for cutting or sharpening the teeth or a percussion
process may be employed, that is to say the repeated impart of one or more tools
adapted to produce in this way the required teeth.
The same type of machinery may be employed for cutting mosaic plates to the
required shape and generally to cut mouldings, and to shape stone in a similar
manner, as, fret saws are used for cutting wood.
The same machinery may also be adapted for dressing or polishing the surface of
stone.
.
The revolving steel cutter and mechanism connected therewith is applicable to
and claimed for all kinds of saws.
Having now particularly described and ascertained the nature of said inven-
tion, and in what manner the same is to be performed, I declare that, what
I claim, is
1. The combination of two grooved pulleys with an endless blade or saw of any
kind.
2. The combination of an endless saw with a movable frame provided with guide
rollers.
3. The combination of the pattern guides c c¹ with the guides b ¿¹.¿ ¿
4. The combination of the apparatus for cutting or sharpening the teeth of the
with the frame of the said saw.
BаW,
The whole substantially as described and illustrated by the drawings.
Dated this 22nd day of August 1885.