IMPROVE- MENTS IN MACHINERY OR APPARATUS FOR CUTTING OR SAWING, MARBLE, GRANITE, OR OTHER HARD STONE
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by Edmund Edwards at the Office of
the Commissioners of Patents on the 10th January 1883. Communicated to
him from abroad by Antoine Jeansaume of Paris in the Republic of France.
EDMUND EDWARDS, of the firm of Edwards and Co:-Patent Agents and
Engineers, of 40, Southampton Buildings in the County of Middlesex. "IMPROVE-
MENTS IN MACHINERY OR APPARATUS FOR CUTTING OR SAWING, MARBLE, GRANITE,
OR OTHER HARD STONE [Communicated to hin from abroad by Antoine
Jeansaume of Paris in the Republic of France]
This invention relates to machinery or apparatus used for cutting or sawing
hard stone of any kind.
The machine consists of a frame preferably of cast iron having a horizontal arm
fixed to and projecting over the surface of a table or support upon which the stone
to be cut is placed.
The table itself is carried upon legs or other suitable frame-work. Upon the
frame and table arranged as described are arranged bearings in which revolve
three pullies or drums, one at the extremity of the horizontal arm, the second
at the back of the arm where it is fixed to the table, and the third
underneath the table and directly below the first. One or more of the pullies is
preferably made adjustable, so that an endless band which passes round the three
pullies and through suitable openings in the table can be tightened as desired:
This band may be of iron, steel, copper, brass, or other suitable material or com-
bination of materials, and it is guided, when made to travel by the revolution of
the pullies, by a guide consisting of two horizontal parallel rollers carried upon an
adjustable support so that the sides of the band pass between them.
Upon the same support is arranged at the back of the band a third vertical
roller or wheel against the edge of which the back of the band bears.
In front of the edge of the band and opposite to the wheel last described, is
arranged a vertical wheel of steel, toothed, notched, or roughened with file teeth or
saw teeth at its circumference, which can be forced against the front edge of the
band by incans of two screws which press against two plates arranged behind two
helical springs the other ends of which press forward the bearings in which the
wheel revolves which bearings are moveable in slots or grooves. The edge of the
wheel can thus be pressed against the edge of the moving band which is prevented
Prine 21

page_text: from moving back by the vertical guide wheel behind it, and in this way the teeth
of the front wheel are marked or indented into the edge of the band, and as the
latter wears fresh marks or indentations are produced, and into these marks are
supplied and retained sand or emery and water which are introduced as desired
from suitable reservoirs by means of adjustable regulating cocks or valves, and in 5
this way the band or blade quickly and effectively cuts the stone or marble placed
upon the table. The band may further be fluted or indented upon its two sides by
two suitable wheels arranged at the back of the machine so that the band passes
between them.
The toothed or cutting wheel described may be arranged so that its position and 1
height can be readily altered as desired. Or, it may be arranged at the back of
the machine or below the table, or in other position where the indenting or
grooving of the sides or edges of the band in the manner described can be inost
conveniently effected, or it may be carried by the guide which guides the band.
The movement of the band may be effected by grooved wheels or pullies and 1
cords or bands, set in motion by a treadle, or other convenient power.
Blades working up and down in the ordinary well known way may be used
instead of endless bands, the toothed or roughened wheel or wheels being employed
in a way similar to that described.
The helical springs cause a constant pressure of the wheel against the band
when the latter is in use, without the necessity for turning the screws.