Year: 1886

page_text: I, JAMES PECKOVER, of No. 158, North 22nd Street in the City of Philadelphia,
County of Philadelphia, State of Pennsylvania, United State of America, Stone
Mason, do hereby declare the nature of my said Invention to be as follows:-
This Invention consists of certain Improvements in the construction of machines
for sawing marble and other stones, part of my present invention consisting of
certain improvements in the construction of the stone sawing machine for which I
obtained British Letters Patent Number, 14,353, dated November 23rd 1885,
while, another part of my present invention relates to the construction of the
devices for feeding the sand or other granular material to the saws, and still other
features of the invention will be described in detail hereinafter.
The main fixed. frame of the machine consists of a number of vertical posts,
longitudinal stringers at the top, and transverse connecting posts.
The machine also comprises a vertically adjustable carriage bed which consists
of an open rectangular frame, having connected to its four corners vertical
supporting chains or ropes which pass up over the pulleys on the frame. The saw
frame consists of the usual rectangular frame, having any desired number of saw
blades adjustably secured therein, and it traverses on ways on the said carriage bed,
one of its ends being connected to the driving devices in the manner which I will
now proceed to describe.
In the machine described in the Specification of my above mentioned Patent
No. 14,353, these saw frames are driven from two crank shafts connected by rods.
to a vertically reciprocating T bar. By my present invention, however, I simplify
the construction of the driving appliances and provide for an economical arrange-
ment for the operation of several machines from the same power, by arranging two
sawing machines back to back and dispensing with the cranks and connecting rods.
Instead thereof, I bring the reciprocating bars closer together and unite them to
leave between them a vertical groove, in which work two cams, on horizontal
driving shafts.
By this means a transverse reciprocating motion may be imparted to the saw
frames of two machines from the same power, and as many machines as desired
may be arranged in pairs, to be driven from the same horizontal shafts.

page_text: In order, however, to provide for the stopping of any of the machines when
desired, I so connect each of the saw frames to the reciprocating T bar, that any
of the saw frames may be quickly detached therefrom when desired. I accomplish
this purpose by the following devices.
To the end of the saw frame are pivoted two jaws acted on by suitable springs
so as to tend to close the jaws together, so that when the reciprocating bar and the
end of the saw frame are brought together, the bevilled ends of the jaws are
slipped over the flange of the T bar, pressing back the springs until the jaws have
passed the flange, when they will grip the latter. When however it is desired to
release the saw frame from its T bar, a hollow wedge or double cam provided in
vertical grooves in the carriage bed is moved vertically upwards into the path of
the jaws, so that as the saw frame moves back towards the driving shafts the said
double cam will close the back arm of the jaws and open the latter so as to free
them from the reciprocating frame.
In the former machine, hereinbefore referred to, the ropes, chains or cords which
supported the frame for the saw passed up over pulleys on two crank shafts,
united by a connecting rod so as to turn in unison. By my present invention I
dispense with these crank shafts and connecting rods and connect the ropes of
each frame, after passing over the pulleys herein before referred to, to other pulleys
on the same horizontal shaft which is provided with any suitable counter-balancing
devices in any well-known manner.
Over the top of each machine I provide a sand-feeding device consisting of a
long trough-like hopper having inclined sides and provided at suitable points
along the bottom with distributing spouts having intermediate slides or gates
whereby the supply of granular material may be cut off or opened at will. In
some cases, several of such slides may be provided having openings of different
sizes. In such case, these slides may be arranged one above the other the one
having the largest opening at the top, so that by withdrawing one or more of the
slides, the amount of sand allowed to pass downwards to the spouts can be
regulated.
Each of the distributing spouts is secured to the underside of the hopper in any
suitable manner, and each spout consists of a tubular or other suitably shaped
casing with an internally fluted cone having its apex near the top of the spout. The
number of these flutes on the cone may be varied to suit requirements, and in
connection with each flute I provide an adjustable conduit of a suitable size, the
upper end of the conduit being connected to the spout in any convenient manner.
The top of each conduit may be provided with a hook adapted to be connected
with an eye on the cone or casing of the spout.
The said conduits may be in the form of a tube or channel, and the connection
of these conduits with the spouts is such that the lower ends of the conduits can
be adjusted within a certain range, to the different saw kerfs in the stone.
I prefer to make the conduits in telescopic sections so that they may be adjusted
to various sizes of stone to be sawed.
In connection with the said trough like hopper, I prefer to use a screening
device consisting of a longitudinal trough supported at one end on the hopper or
frame, and adjustably supported at the other, so that it can be set to any desired
angle.
In order to get an even distribution of the sand or other granular material,
which is fed into the elevated end of the sieve, the sieve surface on the bottom of
the trough is made tapering from the upper end down to the lower end thereof.
If the sieve surface extended across the entire width of the trough, at the upper
end as well as the lower end, the material which is fed in at the former would
tend to pass through at that point more rapidly or to a greater extent than toward
the lower end of the sieve.
A transverse channel may be provided at the lower end of the sieve for carrying
off the larger particles of sand or other material which do not pass through the

page_text: Any suitable device may be provided for supplying water to the stone such for
example as an arrangement of piping comprising a main pipe with branches
extending over each machine and provided on their undersides with perforations
to distribute the water in streams over the top of the saws and stone.
The pipes
are provided with suitable cocks or valves, to cut off the supply from any of the
branches, or the main pipe, when desired.
The abrading edge of the saw may be straight, but I make the saw of varying
thickness, a thin part alternating with a thickened part, thus producing alternately,
recesses and projections which will be of uniform width.
With this construction of saw blade, the sand can rapidly enter the kerf to
produce the desired abrading or cutting action on the stone as the saws are
reciprocated, the length of movement necessary being comparatively short.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C.,
Agents for the Applicant.

page_text: Improvements in Machines for Sawing Stones and analogous
Substances.
I, JAMES PECKOVER, of No. 158, North 22nd Street, in the City of Philadelphia,
County of Philadelphia, State of Pensylvania, United States of America, Stone
Mason, do hereby declare the nature of the said 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 consists of certain improvements in the construction of machines
for sawing marble and other stones, part of my present invention consisting of
certain improvements in the construction of the stone sawing machine for which
I obtained British Letters Patent Number 14,353, dated November, 23rd, 1885,
while another part of my present invention relates to the construction of the
devices for feeding the sand or other granular material to the saws, and still other
features of the invention will be.described in detail hereinafter.
On the accompanying drawings:-
Fig. 1. represents a side view, (showing the driving shafts in section) of a stone
sawing machine constructed in accordance with this invention;
Fig. 2. represents a transverse section, on the line 1-2, Fig. 1;
Fig. 3. represents a detached inverted plan view of a part of the invention;
Fig. 4. represents a plan view of one of the distributing spouts for the sand
feeding hopper.
Fig. 5. represents a vertical section thereof;
Fig. 6. represents in vertical section the two parts of the spout detached ;
Fig. 7. represents a perspective view of one of the adjustable conduits ;
Fig. 8. represents in side and plan views one of the saw-blades which I prefer to
use; and
Fig. 9. represents in plan view part of the sand feeding device.
A, (Figs. 1 and 2) represents the main fixed frame of the machine, consisting of
a number of vertical posts, longitudinal stringers at the top, and transverse con-
necting posts. The machine also comprises a vertically adjustable carriage bed, B,
which consists of an open rectangular frame, having connected to its four corners
vertical supporting chains or ropes, b, which pass up over pulleys, b¹, on the frame.
The saw frame, G, consists of the usual rectangular frame, having any desired
number of saw blades, T, adjustably secured therein, and it traverses on ways on
the said carriage bed, one of its ends being connected to the driving devices in the
manner which I will now proceed to describe.
In the machine described in the Specification of my above mentioned Patent,
No. 14,353, these saw frames are driven from two crank shafts connected by rods
to a vertically reciprocating T bar. By my present invention, however, I simplify
the construction of the driving appliances and provide for an economical arrange-

page_text: ment for the operation of several machines from the same power, by arranging two
sawing machines back to back, as illustrated in Fig. 1, and dispensing with the
cranks and connecting rods. Instead thereof, I bring the reciprocating bars, H,
closer together, and unite them so as to leave between them a vertical groove, in
which work two cams, L, on horizontal driving shafts, L'.
By this means a transverse reciprocating motion may be imparted to the saw
frames of two machines from the same power, and as many machines as desired
may be arranged in pairs, to be driven from the same horizontal shafts.
In order, however, to provide for the stopping of any of the machines when
desired, I so connect each of the saw frames, G, to the reciprocating T-bar, H, that
any of the saw frames may be quickly detached therefrom when desired. In
Fig. 3, I have illustrated devices for accomplishing this purpose. To the end of
the saw frame are pivoted two jaws, J, acted on by suitable springs, 1, so as to tend
to close the jaws together, so that when the reciprocating bar and the end of the
saw frame are brought together, the bevilled ends of the jaws are slipped over
the flange of the T-bar, pressing back the springs until the jaws have passed
the flange, when they will grip the latter, as illustrated in Fig. 3. When, however,
it is desired to release the saw frame from its bar, H, a hollow wedge or double
cam, h, provided in vertical grooves in the carriage bed is moved vertically
upwards into the path of the jaws, so that as the saw frame moves back towards
the driving shafts, the said double cam, h, will close the back arms of the jaws and
open the latter so as to free them from the reciprocating frame, as will be readily
understood.
In the former machine hereinbefore referred to, the ropes, chains or cords which
supported the frame, B, for the saw, passed up over pulleys on two crank shafts,
united by a connecting rod so as to turn in unison. By my present invention,
I dispense with these crank shafts and connecting rods, and connect the ropes of
each frame, after passing over the pulleys, b', to other pulleys, d, on the same
horizontal shaft, D, which is provided with any suitable counter-balancing devices
in any well known manner.
Over the top of each machine I provide a sand feeding device, as illustrated in
Figs. 1, and, 2, consisting of a long trough like hopper, F, having inclined sides,
and provided at suitable points along the bottom, with distributing spouts, F¹,
having intermediate slides or gates, f, whereby the supply of granular material
may be cut off or opened at will. In some cases, several of such slides, f, may be
provided, having openings of different sizes, as illustrated in Fig. 9. In such case,
these slides may be arranged one above the other, the one having the largest
opening at the top, so that by withdrawing one or more of the slides, the amount
of sand allowed to pass downwards to the spouts can be regulated.
Each of the distributing spouts is secured to the underside of the hopper in any
suitable manner, and each spout consists of a tubular or other suitably shaped
casing,, with an internally fluted cone, k, having its apex near the top of the
spout, F¹. The number of these flutes on the cone may be varied to suit require-
ments, and in connection with each flute I provide an adjustable conduit, K, of a
suitable size, the upper end of the conduit being connected to the spout in
convenient manner. In the present instance, I have shown the top of each conduit
as provided with a hook, r, adapted to be connected with an eye, e, on the cone or
casing of the spout.
any
The said conduits, K, may be in the form of a tube or channel, as illustrated in
Fig. 7. and the connection of these conduits with the spouts is such that the lower
ends of the conduits can be adjusted, within a certain range, to the different saw
kerfs in the stone, S.
I prefer to make the conduits, K, in telescopic sections, as shown, so that they
may be adjusted to various sizes of stone to be sawed.
In connection with the trough like hopper, F, I prefer to use a screening
device; M, (as shown in Figs. 1, and, 2,) consisting of a longitudinal trough,

page_text: supported at one end on the hopper or frame, and adjustably supported at the
other, so that it can be set to any desired angle.
In order to get an even distribution of the sand or other granular material,
which is fed into the elevated end of the sieve, the sieve surface on the bottom of
the trough is made tapering, as indicated in Fig. 2, from the upper end down to
the lower end thereof. If the sieve surface extended across the entire width of the
trough, at the upper end as well as the lower end, the material which is fed in at
the former would tend to pass through at that point more rapidly or to a greater
extent than toward the lower end of the sieve.
A transverse channel, n, may be provided at the lower end of the sieve for
carrying off the larger particles of sand or other material which do not pass
through the sieve surface.
Any suitable device may be provided for supplying water to the stone, and in
Fig. 1, I have illustrated an arrangement of piping, P, P¹, the pipe, P, being the
main pipe, with branches, P¹, extending over each machine and provided on their
undersides with perforations to distribute the water in streams over the top of the
saws and stone. The pipes are provided with suitable cocks or valves, to cut off
the supply from any of the branches, or the main pipe, when desired.
I prefer to construct the saws as illustrated in Fig. 8, which shows one of the
blades in side view and in plan view. The abrading edge of the saw may be
straight, but I make the saw of varying thickness, a thin part alternating with a
thickened part, thus producing alternately, recesses, t, and projections, t¹, which will
be of uniform width.
With this construction of saw blade, the sand can rapidly enter the kerf to
produced the desired abrading or cutting action on the stone as the saws are
reciprocated, the length of movement necessary being comparatively short.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is
1. The combination of the frames of adjacent sawing machines, with recipro-
cating saw frames and bars, H, and cams to act on the said bars, substantially as
herein before described.
2. The combination of the frames of adjacent sawing machines and the recipro-
cating saw frames thereof, with operating T-bars, H, cams, and devices sub-
stantially as hereinbefore described for attaching the sawing machines to, and
detaching them from the said bars, as and for the purpose set forth.
3. The combination of the operating cams, and reciprocating T-bars, H, with
saw frames having spring gripping jaws, substantially as herein before described.
4. The combination of the frame of a sawing machine, with a vertically adjust-
able frame, B, carrying the saws, ropes, b, pulleys, b¹, and pulleys, d, on one shaft,
to which all the ropes are connected.
5. The combination of a stone sawing machine, with a sand feeding hopper
provided with a number of spouts, and a series of conduits depending from said
spouts and adjustable independently to bring their discharge points immediately
over the saw blades, all substantially as hereinbefore described.
6. The combination of a stone sawing machine, with a sand feeding hopper,
having spouts containing fluted cones, with conduits leading from the outlets of the
said cones to discharge the sand over the saws, substantially as hereinbefore set
forth.
7. The combination of a stone sawing machine, with a sand feeding hopper over
the saws, and conduits leading therefrom to the saws, and a sand sieve over the
top of the hopper, all substantially as herein before specified.
*8. The combination of a stone sawing machine and a sand feeding hopper therefor,
with an inclined sieve over the feed hopper and having its sieve surface tapering

page_text: from its upper to its lower end, for the more even feeding of the sand through the
hopper, substantially as hereinbefore described.
9. The combination of a stone sawing machine, and a sand feeding hopper having
spouts, with telescopic conduits leading from the spouts to discharge the sand to
the saws, substantially as hereinbefore set forth.
10. A stone sawing machine, having saw blades of varying thickness throughout.
its length, substantially as herein before described.
Dated: YOLL
T
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C.,
Agents for the Applicant.