Improvements in or relating to Apparatus for Use in Cutting or Sawing Stone and the like.
Year: 1897

page_text: Date of Application, 20th Apr., 1897-Accepted, 31st July, 1897
Improvements in or relating to Apparatus for Use in Cutting or
Sawing Stone and the like.
A communication from THE SVENSKA STENSÄGERIAKTIEBOLAGET of Kungsgatan 34,
Stockholm, in the Kingdom of Sweden.
I, ALFRED JULIUS BOULT of 111 Hatton Garden in the County of Middlesex,
Chartered Patent Agent, 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 :-
This invention relates to apparatus for cutting stone and other hard material in
which grinding or cutting matter, in the form of grit and steel or similar bars, both
combined or each separate, are conducted through canals or channels in the saw-
blade.
On the annexed drawings, the invention is shown in different modifications.
Figures I, II, and III represent the invention as applied to a saw with a rectilinear
saw-blade; Figures IV, V and VI show the same applied to a circular saw; and
Figures VII and VIII show a combination of two circular saws.
In Figure I the saw-blade 1 is shown inserted in an ordinary saw-frame 2 and
supplied with canals 3 passing vertically through the blade. Through these passages
is fed sand or any other finer or coarser grinding substance, or through these passages
are conducted rods or wires 4 of iron, steel or other suitable material of any desired
sectional area which are continually fed out; or these different cutting materials may
be combined, certain passages being intended for the supply of sand or grinding
material and others for bars, rods, or wires. The passages which are intended for
supplying sand or grinding material are connected with tubes 5 or with tubes issuing
from a common trough. The rods or bars 4 are fastened to a cross-bar 6 of suitable
construction, which runs in guides 7 in the frame 2 and by their own weight or by the
pressure of the springs 8, or of any other pressure or weight, feed out the bars in the same
degree as they are worn off in the grinding process. The passages intended for the
rods may advantageously open alternately on both cutting edges of the saw blade
(Fig. 1A), in order that the cut inay at least be as wide as the thickness of the
saw-blade. The rods or wires may be wound up on spools 9 from which they may be
unrolled as they are worn off.
In the blade there are
Figs. II and III, show a modification of the invention.
passages or slots of sections corresponding to those of the bars disposed on both sides
and opening outwards. The bars are at their upper ends supplied with heads 10 of
suitable form, which may be inserted from the side in corresponding openings 11 in a
sliding cross bar 6. In order to hold these heads fast in the openings 11, they are
on their upper surface supplied with small holes 12 into which pins 13 in the cross
bar 6 drop under the pressure of springs 14. The cross bar 6 is pressed downwards
by springs or any other suitable pressure, or as shown in Fig. II, by a screw-device.
In this case a screw 15 protected by a tube 16 passes through one side of the frame
and through the cross bar. The latter is moved upwards or downwards by turning
the screw 15. Since the bars here run in slots, on the sides of the saw blade, the cut

page_text: in the stone is rendered exceptionally regular. The bars may be made of bent and
hardened steel plate.
The device consisting of slots opening towards the sides may also be applied in the
saw shown in Fig. I.
The
Fig. IV, V and VI, show the invention as applied to a circular saw-blade. In this
blade the passages or slots 3 are disposed radially. The passages intended for sand or
grinding material communicate with a central opening in the blade, which opening
is prolongated into a tube 17 running in the direction of the axis of the saw.
passages intended for the bars, rods, or wires open laterally on the blade. Thence
the bars pass in an axial direction along the tube 17 and through slots in a ring 18
sliding on the tube. The bars, rods or wires, are held fast between this ring and
another single or double ring 19. The rings 18 and 19 which rotate with the tube,
are held fast to it and to each other by means of screws which enter grooves in the
tube 17. The ring 19 is embraced by a guide 20 effected by a weight, a spring or
the like, in consequence of which the bars, in the same degree as they are worn off,
are fed out through the blade. In the guide 20 there are disposed friction-rollers.
The passages intended for the bars may also, in the circular saw, be open along the
side of the blade 1.
For feeding out sand or grinding material a funnel shaped tube 21 with an inlet 22
for water is connected to the tube 17. The sand passages may, when they pass away
from the stone be closed by a semi-tube, 23 fastened to the funnel 21 and passing
through the tube 17.
Figs. VII and VIII. show two circular saw-blades combined for the simultaneous
production of cuts running at an angle to each other. The device consists of a
carriage 25 running on two rails and supporting bearings in which are journalled an
upright shaft 26 supporting a horizontal saw-blade and a sliding frame 27 which
forms a bearing for a shaft 28 supporting a vertical blade. By means of this
combination a block of stone may be cut out while the carriage is passing.
Having now particularly described and ascertained the nature of the said
invention as communicated to me by my foreign correspondents, and in what manner
the same is to be performed, I declare that what I claim is :-
1. In apparatus for cutting stone or the like, the arrangement of passages or slots
in the saw-blade, through which passages the cutting or grinding materials are
continually fed out in the form of bars, rods, or wires or sand or grinding material,
substantially as described.
2. In apparatus for cutting stone or the like the arrangement of metal bars rods or
the like attached to a bar or disc carried in guides, and passing through the passages
in the saw substantially as described.
3. Apparatus for cutting stone or the like as set forth, in which the blade is circular
and fastened to a rotating shaft, substantially as set forth and shown.
4. In apparatus for cutting stone or the like such as set forth in Claim 3 the
arrangement of bars held fast between two sliding rings and actuated by a sliding
guide, substantially as set forth and shown.
5. In apparatus for cutting stone and the like as set forth in Claims 3 and 4, the
arrangement that the guide is supplied with friction-rollers, substantially as set forth
and shown.
6. In apparatus for cutting stone and the like as set forth in Claims 2 to 5, the
arrangement, that the disc or rings holding the bars are actuated by springs, weights,
or the like, in order to automatically feed out the rods, bars or wires in the same
degree as they are worn away substantially as described.
7. In apparatus for cutting stone and the like as set forth in Claims 2 to 6, the
arrangement, that the passages are open alternately on both sides of the saw-blades
in order that the bars may make a cut of at least as great a width as the thickness of
the saw-blade, substantially as set forth and shown.
8. In apparatus for cutting stone and the like as set forth in Claim 7, the
arrangement, that the bars are held fast in suitably formed slots in a cross-bar movable

page_text: by means of a screw, the upper surfaces of the bars being supplied with holes, in
which engage pins supported in said cross-bar and actuated by springs, substantially
as set forth and shown.
9. In apparatus for cutting stone and the like the combination of two rotating
saws as set forth above, consisting of a carriage running on rails and supporting an
upright shaft provided with a horizontal saw-blade and a sliding frame with a
horizontal shaft for a vertical saw-blade, which saw-blades simultaneously make two
cuts at an angle to each other while the carriage is passing, substantially as set forth
and shown.
AALL
BOULT & WADE,
Agents for the Applicant.