Improvements in Stone Sawing Machines.
Year: 1896

page_text: Improvements in Stone Sawing Machines.
JAMES PECKOVER Stone Carver 822 North 38th Street Philadelphia, Penn-
sylvania, U.S.A. does hereby declare the nature of this invention to be as follows:-
Supporting the stone being operated on and carrying it along in a smooth steady
manner in order to secure straight sawed surfaces: securing a uniform pressure so
that the pressure will adjust the speed of the sawing to the yielding nature of the
material: spacing setting and holding the saws rigidly in position: collecting the
abraiding material and redistributing it to the saws in a uniform manner: feeding
the abraiding material to the saws at the end of the stone: maintaining the slabs
being formed in 'their true positions: securing effectiveness and economy in stone
saws and a ready method of regulating the water supply effectively.
I attain these objects by the use of mechanism illustrated in the accompanying
drawings of which Fig. 1 is a side elevation. Fig. 2 is a plan of same and
Figs. 3 to 25 inclusive are details of same sufficient to show their uses, the manner
of their construction and their relations to each other.
All the things of the same order are not indicated by reference letters, as, for
instance, the wedges, t3, Figs. 22 and 23 are not all marked t³ and in every other
instance where repetition will not aid illustration I avoid it.
Figs. 1, 2, 3, 4, 11, 12, 13 and 14 illustrate my first object.
Figs. 1 and 2 illustrate my second and third objects.
Figs. 7, 8, 9 and 10 illustrate my fourth object.
Figs. 1, 2, 5, 6, 15, 16 and 17 illustrate my fifth object.
Figs. 1, 2, 3, 4, 22, 23, 24 and 25 illustrate my sixth object..
Figs. 20, 21, 22 and 23 illustrate my seventh object.
Figs. 18 and 19 illustrate my eighth object and
Figs. 1, 2, 20 and 21 illustrate my ninth object.
Referring to Fig. 1 and 2 it will be seen that the rails B are higher and wider
apart than the rails B' and B2. The saw frame, b, works in between the rails B B' and
between the ends of the rails B' B2. Car A¹, is a duplicate of car A; each consists
of a roller, a, and a piece of channel iron, a', suitably journalled for their due
movements. Car A2, being shorter than car A permits the rollers c to pass it, and
being lower permits car A to pass over it while delivering the rear end of the
stone to be sawed through; therefore, car A3, is provided with two movable
blocks, a one for each side of the stone supporting it at a proper height. Near
the ends of B2, nearest the saws, a slight depression is made in the top sides of each
for receiving the roller of car A2 as soon as it has landed the stone on car A'; said
depressions liberate the blocks on car A2, which must be removed out of the way
of the oncoming car A.
The middle car, A2, is placed far enough under the stone, S, to land the front
When the stone
end of the stone on to the front car, A', at the rear of the saws.
is well over the car A', each slab, being formed, is wedged up, well in its true
position; and a small wedge is placed in each kerf at the lower edge of the stone.
on the
When the stone is sawed about half way through, a clamp, t, is placed
stone, as shown in, Fig. 23 and a small wedge inserted into each kerf, but not too
haid; the space between the stone s, and the key t¹, is filled in with the blocks t
Fig. 23; the key, t', is driven home and the slabs will be held in their true

page_text: positions as long as desired. The front car, A', and the rear car, A, will carry the
stone along, smoothly and steadily, until it is sawed through; thereby, assuring
straight, even surfaces to the sawed slabs. Fig. 3, is a plan of portion of car A
with one side removed to show the rollers c the retaining rods ce' and the rail B,
and Fig. 4 is a vertical section of same; the sides, A, are vertical and the rear
end m is firmly secured to them in a position parallel to the saw frame Figs. 1
and 4. The stone, s is supported at its rear end by the hooks m2 suspended from m;
in order to adjust the hooks to the uneven surface of a stone use wedges, m, and
hold the hooks in place by keys, n', secured by wedges, n²; the hooks must not be
placed in the paths of the saws, and one, or more hooks must be used to each slab
that has to be formed; Fig. 3 is a plan showing the key hole. A sufficient
number of rollers, c, Figs. 1, 2, 3, 4, 11, 12 and 14 is provided for car A, duplicates
of each other, flanged at each end to keep them true on rails B, and to assure the
trie running of car A; rollers, c, are grooved in the centre deep enough to
accommodate the rods c' Fig. 12 without coming in contact with the car; section
Fig. 14 shows the flarges, and the grooves embraced by the rods c which are used
to maintain the rollers in their relative positions.
The balance wheel, r, is mounted and driven in the usual manner imparting
motion to the saw frame, b, through the medium of the lever, b, connected to the
saw frame, b, by the link, Fig. 1. The lever, & is connected to r by the link e.
The lever, the rods with the adjustable counterweights, e, are secured to the
shaft ; the weights, 2, are connected by the rod e' on which can be adjusted
weights to evenly balance the saw frame and saws in operation in order to assure
a uniform volume of power to operate them, whether they are 'ascending or
descending.
Two cables, e, are attached to the car A, Figs. 1, and 2 and pass under the lower
pulleys, c, and over the upper pulleys, e, maintaining the weights c; the fast and
loose pulleys y Figs. 1 and 2 attached to the shaft that supports the weights
receives a belt connected with any source of power to impart motion to the shaft y
and the pulleys c³ thereby aiding the weights, e, in their duty of causing the
forward movement of the stone, s, to exert a uniform pressure on the saws which
will adjust the speed of the sawing to the yielding nature of the material being acted
on. If a speed is imparted to the pulleys, somewhat, faster than the stone can be
sawed it will assure enough pressure being exerted on the saws and permit the
cables to slip on their pulleys; thereby, adjusting the pressure to the necessary
amount, without a waste of power, and will prevent injury being done to the
machine or to the quality of the sawing. The declivity of the rails down which
the stone travels can be so adjusted as to require very little weight, when reinforced
by a driving belt, to exert enough pressure. The ends of the saw frame, f, are
provided with circular recesses 1 Figs. 4, 7, 8, 9 and 10 Fig. 7 being a cross
section through the middle of a saw frame end and Fig. 8 is a section of a portion
of a saw frame end through the centre of the slot, 2. The circular recesses extend
from one side of the saw frame to the opposite side and there are two, of said
recesses, in each end.
Each recess is fitted with hard rubber, or other suitable packing, '; a screw, v
is embedded in each packing to the depth of very nearly, half its diameter, and
extends across the saw frame, half nuts, t, grooved on one side, v², are fitted to the
screws for holding the saws s; shown, more clearly, in the enlarged drawings,
Fig. 9, and cross section, Fig. 10, the depth of the slot being indicated by the dotted
line in Fig. 10. It is evident that the half nuts can be placed anywhere on the
screws to suit the requisite spacing and setting of the saws, which, when properly
set and secured in the saw frame, the half nuts will be locked fast and the saws
will be held, rigidly, in their respective positions.
Two endless bands y Figs. 1, 2, 5, 6, 15 and 16 may be either chains as shown
in Figs. 1, 2, 5 and 6 or ropes as shown in Figs. 15 and 16. The bands, g, are set
in motion by the agency of the ratchet wheel J being connected to the shaft b by
the crank and pin 7 the lever 6 and the pawl or finger 5 the speed of. the, ratched

page_text: being adjusted by the position of the pin 7. Figs. 1 and 2 it will be seen_that_the_
bands 9 travel crosswise around the stone and outside the rails B; at suitable
distances apart rods g are secured to the bands g, wires are attached to the
rods g, one at each end, the upper, or rear, wire being wound round g, the lower
or front wire being passed over g, as shown in Fig. 16; plates p duplicates of each
other turned up on three sides, the front side being open, one side higher than its
opposite side and bent to overlap each other as in Figs. 15, 16 and 17 will prevent
the abraider escaping between two adjoining plates when collecting it-are attached
to wires g. The plates are adjustable for collecting and distributing the abraider"
by the arrangement of wires g and the movable bar p Figs. 1 and 2. Rods 4'
secured to the front ends of and spread into the opposite corners of plates p.
Figs. 1, 2, 5, 15 and 16 maintain the plates in their proper positions.
For collecting the abraider the positions of plates p are adjusted by moving the,
bar p3 towards their front sides and after passing over it they regain their normal
positions. A sheet of metal i, the full width of the widest stone than can be sawed
in the machine, is firmly secured under the stone, Figs. 1 and 2 its lower end fixed.
diagonally over the plates will spread the abraider evenly on,them as it falls from
the kerfs; a tank. Q is provided to collect any abraider that may escape the
plates; Q being an overflow pipe. Grooved pulleys, g', are suitably mounted and
set in motion by ordinary mechanism in order to cause the bands and plates to
travel round the stone in the discharge of their duty; g are shafts provided for,
the due mounting of the pulleys, o. Slotted hoards, we are firmly fixed on each
side of the stone, slots so are made parallel to the saw frame, stretchers ware,
fitted to move easily in the slots and are adjustable to the varying heights of stones
by means.of light cables 10 passing over pulleys 10 and secured to counterweights 9
provided to balance the stretchers Figs. 1, 2, 5 and 6. Channels o held on,
stretchers w by hooks a are provided with receivers wo³ Fig. 5 resting on the stone
for receiving and feeding the abraider to the saws; therefore, they must always be
placed directly in front of the saws and the receivers must be sufficiently open to
freely-admit the saws working through them. Brackets 1 secured to the boards a
for receiving and supporting a shelf 2 on which are secured channels a duplicates
of each other in order that each may receive an equal amount of abraider. There
must always be one channel a to each saw therefore a number of shelves must be
provided and each one bearing a different number of channels. Channels are
loosely attached to channels aso that in the event of a channel a not being directly
over its corresponding channel w 2 can be turned into it in order to maintain the
connection necessary for conveying the abraider.
A water supply pipe u Figs. 1 and 2 placed over the plates p and diagonally
across their path will begin to wash the abraider from their front sides and
gradually recede rearwards, as the plates move over the abraider will be washed
from them in a uniform manner their incline facilitating the process. The
abraider will thus pass from the plates through the series of channels and be fed to
the saws in a uniform manner.
To prevent the slabs breaking while being formed wedge each one up in its true
position as soon as possible, ou, car A' wedges a' being provided for that purpose;
also insert wedges into the kerfs immediately over wedges a2 and when the stone is
sawed about half way through fix a clamp t shown in the side view Fig. 23 the top
view Fig. 25 and in the end view Fig. 22 insert wedges t in the kerfs a-if driven
in too hard the slabs will be broken-then fill in the space between the stone s' and
the key with blocks, drive home the key and the slabs will be held in their
true positions as long as desirable.
In order to feed the abraider to the saws at the end of the stone fix a slab m¹
formed of boards, or other suitable material, in the car A. Figs. 1, 2, 3 and 4,;
Fig. 3 being a plan of enough buards fixed to show their uses and a sufficient
number of books being thereby exposed to illustrate the uses of the hooks. Fig. 4
is a sectional elevation. Wedge-shaped boards m³ are fitted between the slab m
and the stones forming spaces a, directly in the paths of the saws, to be filled with

page_text: abraiding material. The saws on entering the spaces n will feed themselves from
the abraider, in the spaces aided by that fed to them in the usual manner from the
plates until the stone is sawed through. The slabs m¹ and the boards m³ must
never be less than the height of the stone to be sawed.
Stone saws described and claimed in Letters Patent of the United Kingdom of
Great Britain No. 16,128, A.D. 1893 are objectionable because they warp under
very slight pressure and the usefulness of their springs and rivets are early impaired
and destroyed by the action of the abraiding material used in sawing stone.
Rigidity in stone saws being a prime factor it is preferable to construct each
saw out of one piece of metal steel plates being preferable for the purpose specially
prepared with a middle portion thicker than either of the two outer portions.
Fig. 18 is a side view of a sufficient portion of a stone saw to illustrate my
improvement in stone saws and Fig. 19, is a sectional view of same, teeth s' are
formed in each of the thinner portions by cutting notches & the thicker middle part
or body of the saw s will hold the teeth rigidly to their work under a great
amount of pressure, when the teeth on one side are worn away the teeth on the
other side can be brought into use and the usefulness of the saw will in nowise be
impaired by the wearing away of the teeth on one side, this method can be reversed
in order to produce saws with teeth thicker on each side of a thinner middle part
without departing from my invention.
A water supply pipe u similar in most respects to those used in stone sawing
machines, differing from them in being stationary, is fitted with grooved metal
shields us one on the opposite side of the pipe to each outlet u¹ Figs. 20 and 21
Fig. 20 is a sufficient portion of u to show the uses of the shields u³ and the rubber
bands u. Fig. 21 is a cross section of same u2 closes the outlet u' and when water
is required from any outlet u² is pulled aside as shown by u Fig. 20.
Dated this 14th day of September 1896.
JAMES PECKOVER.
JAMES PECKOVER Stone Mason 822 North 38th Street Philadelphia Penn-
sylvania U.S.A. I 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 -
The objects of my invention are, first, to provide means for supporting the stone
and feeding the same while it is being sawed in a steady uniform manner such as to
insure sawed surfaces of straight and even character; second, to balance the saw-
frame in such a manner that the power required to operate it shall be uniform
during both the up and down strokes of the saw, and also to provide means whereby
such balance may be adjusted to compensate for the use of a greater or less number
of saws in the frame; third, to secure certain and uniform pressure of the stone
against the saws and regulate the rate or speed of sawing to the character of the
stone operated upon; fourth, to provide ready, efficient, and convenient means for
spacing, setting, and securing the saws in their frame; fifth, to provide means for
collecting the abrading material discharged from the saws and for returning the
same for reuse; sixth, to provide means for supplying the saws with abrading
material at the rear end portion of the stone; seventh, to maintain the sawed slabs
in their true positions as long as may be desired; eighth, to secure effectiveness
and economy in the saws, and, ninth, to improve the means of regulating the
water-supply.

page_text: Other minor objects of the invention will hereinafter appear.
With these objects in view the invention consists in the novel construction
and combination of parts, all as hereinafter described, and pointed out in the
appended claims.
In the drawings left with the Provisional Specification
Fig. 1 is a side elevation of a machine embodying my invention. Fig. 2 is.a
plan view of the same.
Fig. 3 is a plan view, partly broken away, of the rear portion of the machine
with a stone thereon. Fig. 4 is a side elevatiou of the same, partly in section.
Figs. 5 and 6 are detail views showing the means by which the abrading
material is distributed and fed to the saws.
Figs. 7, 8, 9 and 10 are detail views showing the manner in which the saws are
held and secured in the saw frame.
Figs. 11, 12 and 14 are detail views of one of the rollers of the rear car.
Fig. 13 is a detail view showing the manner in which said rullers are maintained
in their proper relative positions.
Figs. 15, 16 and 17 are detail views showing the construction and arrangement
of the buckets.
Figs. 18 and 19 are side and sectional views, respectively, of one of the saws.
Figs. 20 and 21 are detail views of the water-supply pipe.
Figs. 22, 23 and 25 are detail views of the stone clamp.
Fig. 24 is a view of one of the blocks, which are used in connection with
said clamp.
In the drawings the letters d and a designates the frame of the machine.
BB designates a pair of rails which extend longitudinally of the said frame
and constitute a trackway for the rear car.
B B designate a second pair of rails which are located between the rails B
and at a lower level and constitute a second trackway at the rear of the saws
for car A¹.
B seen, only, in Fig. 1 constitute a third trackway at the front of the saws for
car A2 they are in a line and on the same inclined plane of rails B. A designates
a car or carriage which is adapted to. travel on the rails B, being mounted on
rollers C. These rollers are flanged at both ends (see Fig. 12) to maintain their
true positions on the rails and are held in their proper relative positions with
respect to each other by means of longitudinal retaining rods C, which have
semicircular portions to engage the central grooves of the rollers (see Figs. 12
and 14).
AA2 designates two cars or carriages, which are mounted to travel on the lower
rails B1 B2, these cars being shorter than the rear car A, the latter can readily
pass by and over the car A while supporting the stone until it is sawed through.
Said cars A' A' comprise a frame or body portion a' and rollers a, upon which
they are mounted.
a Fig. 1, designates removable blocks, which are placed on the car A³ to support
the stone S at the proper height. The rails B, near the end portions thereof
nearest the saws, are formed with depressions in order to drop car A, after having
delivered the front end of the stone securely on car A', just sufficient to liberate
the blocks a; which, are then removed out of the way of the oncoming car A.
The middle car A2 is placed far enough under the stone to land the front end
of the latter upon the front car A' without the car A2 coming in contact with
the saws.
Connected to the respective sides of the car A are two cables d, which extend
to the front end portion of the machine, where they pass under pulleys.³ and
thence up and over the pulleys e mounted on the shaft y, which is journalled over
the machine in suitable hangers. Connected to the free ends of the said cables are
adjustable weights e. On the shaft y is a fast and loose pulley y, which is designed
to receive a belt from any suitable source of power to impart motion to said shaft
and thereby assist the said weights to cause the forward movement of the car A

page_text: with its load. In this manner the stone is caused to exert a pressure
and uniform upon the saws and the speed of sawing is regulated to the particular
character of the stone being operated on, since if a speed is imparted to the said
shaft somewhat faster than the stone can be sawed the cables will slip on their
pulleys and prevent too much pressure being exerted on the saws. The rails B, B
and B are preferably somewhat inclined to also assist the feed, so that the
weights may be comparatively light, especially when they are assisted by the
driving belt, as above described."
bis the reciprocating saw frame, which is mounted in suitable guides to move in
an inclined plane, as shown.
designates a driving pulley, and r a balance wheel operatively connected with
the saw-rame through the medium of a crank link e the lever 62 and the link ;
the said lever is rigidly sleoved on a rock shaft. &, Figs. 1 and 2 and connected to
said shaft are two counterweighted arms , whose weights & and e' are adjustable
on a connecting rod el, Fig. 2. By means of these counterweights the saw-frame
may be accurately balanced and the power required to operate the same rendered
constant during both the up and down strokes; the weights can also be adjusted
to compensate for the use of a great or less number of saws.
The end portions of the sawframe are vertically split or slotted, for receiving
bolts to secure the saws in the frame in the usual manner, as indicated at 2 and
the slots thereof are provided at their enlarged upper portions with opposite offset
recesses, Fig. 7, which extend the length of said end portious. Each of these
recesses is fitted with a hard-rubber or other suitable packing f
Seated in this packing in each groove to the extent of nearly one half its
diameter is a threaded rod which extends across the sawframe. Half nuts v³,
Figs. 7, 8, 9, and 10, grooved on one side, as indicated at 2, are fitted to engage
the said rods and to receive and hold the saws s in the manner best shown in Figs. 9
and 10. These nuts may be placed anywhere on the said ruds to suit the requisito
spacing and setting of the saws and serve to lock the latter rigidly but removably
in their respective positions.
I will now proceed to describe the means which I employ for enllecting the
abrading material discharged from the saws and for returning and distributing the
same for reuse.
9. 9 designate two endless conveyers or bands, (which may be chains, ropes, but
preferably, a link belt,) as shown in Figs. 1, 2, 5, 6, 15, 16 and 17. These bands
extend up one side of the frame in a direction parallel with the saw frame and
outside the rails B, thence across the top of the machine over the stone on the
cars, thence down on the opposite side and across through the lower portion of the
frame. They are carried by pulleys g, which are mounted on obliquely journalled
shafts, the rear pulley of each shaft being on a lower plane than the front one.
On one of the lower of said shafts is a ratchet wheel J', which is engaged by a
pawl 5 on one arm of a lever 6, said lever being connected to a crank pin 7 on the
rock shaft . By this means the bands are kept in motion.
Suspended from cross rods g', which connect the two bands at suitable intervals,
are collecting plates or buckets p, which consist each, in the form illustrated, of a
piece of metal, or other suitable material, bent up on three sides, Figs. 16 and 17,
the latter being an enlarged view of portions of plates showing how they overlap
when going across the machine in order that the abrading material may not escape
between them. In Figs. 1 and 2 I have, for greater clearness of illustration,
shown but a few of these plates or buckets in place, but it will be understood that
they form a continuous series at regular intervals. The degree of their inclination
where they make their collection, and also, where they deliver it, may be adjusted
by means of a transverse bar p3, Figs. 1 and 2, which may be moved forward and
back to vary the degree of their contact therewith, and whereby they are tipped to
a greater or less extent as occasion requires. After passing this bar the buckets
return to their normal positions.
Q designates a trough placed underneath the buckets for the purpose of catching

page_text: any abrading material escaping the buckets.
trough.
is an overflow pipe Or SITT
i is a forwardly and downwardly ineline I place which is the full width of the
widest stone that can be sawed by the machine. The lower edge of said plate
extends diagonally over the line of the buckets which pass underneath it, as shown
in Fig. 2. The material discharged from the kerfs by the action of the saws falls.
down on this plate and off on to the moving buckets and is by them carrie I upwards
for reuse in the manner presently described. Owing to the diagonal arrangement
of this plate with respect to the buckets the abrader is spread more evenly over
them.
Secured to the sides of the machine on each side, and parallel with the sawframe,.
are slotted pieces or arins te, the slots and front edges of which form guides for two-
transverse bars w³.
These bars are fitted to move easily in the said guides and are balanced and
adjusted therein to stones of different heights by means of light cables 10', attache l
thereto and passing over pulleys 10, their free ends being provided with counter-
weights 9. The two bars we are connected together to maintain their relative
positions. Removably secured to snid bars by hooks a' is a series of channels (one-
for each saw in operation) 10', having receivers to at their lower ends resting an
the stone and which are sufficiently open at their front siles to admit the saws to.
play through them. They are placed directly in front of the saws.
Secured to the boards w² are brackets 1, which support a transverse removable
shelf 2, having thereon a series of pockets of equal size and adapted to receive
therein the abrader as it is discharged from the buckets p of the endless conveyer.
There must be one of these pockets for each saw in operation, it is, therefore,..
necessary to provide each machine with a number of interchangeable shelves each
having a different number of pockets.
designates a series of channels which extends from the bottom of said pockets.
into the channels we', being loosely connected to the pockets, so that in the event of
a pocket not being directly over its corresponding channel to the channel a² can be
moved to make the necessary connection.
u is a water-pipe which extends diagonally over the upper line of buckets p
above the stone, being supported by suitable brackets and provided on its
underside with a series of discharge openings w. The water discharged from this
pipe falls on the buckets p and washes the abrading material therefrom into the
pockets. By reason of the diagonal position of said pipe with relation to the
line of buckets the material is first washed from the rear or lower edge of the latter,.
and as each moves on the water falls farther and farther forward or upward upon
the same and the abrader is gradually washed from successive portions thereof into.
the said pockets, which are thus insured an approximately equal supply. Said
water pipe is fitted with grooved metal shields, one of which is placed upon the
pipe opposite to each of the discharge-openings. Rubber bands u are held in said
shields around the pipe to close the said openings as necessity requires. To permit.
a flow of water from any desired opening the band is moved to one side, as indicated
at u² Fig. 20.
In order to supply abrading material to the saws at the rear portion of the stone,.
a slab m³ Figs. 1, 2, 3 and 4 is fixed. on car A, parallel with the saw-frame and
extending to the full height of the stone. Wedge-shaped blocks m³, are fitted
between said slab and the rear end of the stone in such a manner as to leave
between them a series of narrow openings n directly in line with the saws..
These spaces are filled with abrading material, and the saws on entering the same
feed themselves, aided by the supply from the channels above described, until the
stone is sawed through.
The stone is held in place on the car A by a means of dogs m³, Figs. 3 and 4,..
secured to the car by keys n', which may be wedge shaped to prevent them slipping
through the eyes of the dogs shown in Fig. 3 and thus dispense with the securing
wedge. The dogs are adjusted to the uneven surfaces of the stones by wedges m

page_text: There should be one or more dogs employed to support each slab to be sawed and
care must be taken not to place them in the paths of the saws.
In Figs. 18 and 19 I have shown one of these saws which I prefer to employ.
This saw consists of a middle portions of some thickness with a thinner portion s
upon each side thereof. Each of these thinner portions is notched, as at s²,
thereby forming the plate into a double saw.
In operation, when the stone has reached a point well over the car A¹ each of
the sawed slabs is wedged up in true positions, wedges at heing provided for the
purpose. A small wedge (not shown) is also driven into each korf at the front and
of the stone immediately above the wedges a. When the stone is sawed half way
through a slotted clamp t, Figs. 23 and 24, is placed transversely across the
stone.
This clamp has a hook portion at one end which is engage! with one side of the
stone, as shown in Fig. 23. The space between the stone and the wall of the slot
at the other end is filled in with blocks , secured by a key or wedge t'. A small
wedge is also driven into the upper portion of each kerf, but not too
hard. The car A is now out of the way by reason of its roller resting in the
depression, before described, and the cars A and A' carry the stone along smoothly
and steadily until it is sawed through.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :
1. In a stone sawing machine, the combination with the three trackways, two being
of the same height and width and lower and nearer together than the third, the
lower and narrower of said ways being between the rails of the higher and wider
one, of the middle and front cars arranged to travel on said lower and narrower
ways, and a rear car mounted to travel on the higher and wider of said ways and
adapted to pass over and by the said middle car, substantially as specified.
2. In a stone sawing machine, the combination with a frame having three.
trackways, of front and middle cars arranged to travel on the lower and narrower
of said ways, a rear car mounted to travel on the higher and wider trackway and
adapted to pass said middle car, cables attached to said rear car, bearings for said
cables, and counterweights attached to the cables, substantially as specified.
3. In a stone sawing machine, the combination with the trackways and with the
front and middle cars arranged to travel on the lower and narrower of said ways, of
a rear car mounted to travel on the higher and wider trackway and adapted to pass
the said middle car, cables attached to said rear car, a rotary shaft having bearings
and pulleys over which the said cables pass, weights attached to the free enda of said
cables, and means whereby power may be applied to said shaft independently of the
said weights, substantially as specified.
4. In a stone sawing machine, the frame having three trackways, one of said
trackways having depressions therein to receive the roller of the middle car,
relieving the blocks supporting the stone at a proper height, substantially as
specified.
5. In a stone sawing machine, the combination of three cars, a rear car carrying
dogs to support the slabs to be Eawed, and fastening devices for said dogs, wedges
for adjusting said dogs to the uneven surfaces of the stones, a middle car carrying
blocks for supporting the stone at a proper height, and arranged so as to land the
stone on a front car, a front car carrying wedges for supporting the slabs being
formed in their true positions, substantially as specified.
6. In a stone sawing machine, the combination with the rear car having the
inclined rear end portion carrying a slab m' parallel with the saw-frame, a series
of wedge-shaped blocks adapted to fit between the said slab and the rear end of
the stone on the car forming narrow spaces for the reception of abrading material,
for the purpose specified.
7. In a stone sawing machine, an endless carrier arranged to travel around the

page_text: stone, and carrying a series of plates, or buckets, arranged to receive the abrading
material discharged from the saws and to convey the same back for reuse, said
plates securely suspended in a manner that permits their adjustment for collecting
and distributing the abrading material, obliquely journalled shafts connected
with them, and means for imparting motion to them, all substantially as
specified.
8. In a stone sawing machine, the combination of endless bands carrying buckets,.
an inclined plate arranged to convey the abrading material discharged from the
kerfs, said plate having its lower edge extending diagonally across the line of said
buckets, for the purpose substantially as specified.
9. In a stone sawing machine, the combination with endless bands carrying
buckets arranged to discharge at one sile, of a water pipe extending diagonally
across and above the upper line of said buckets, and arranged to discharge water
thereon in the manner, and for the purpose substantially as specified.
10. In a stone sawing machine, the combination with the movable frame above
the stone, guides in which said frame is supported to move in a plane parallel with
the saw-frame, a series of channels, or troughs, supported on said frame and having
each a receiver adapted to rest on the stone, said receivers having openings at
one side to permit the saws to play therethrough, and counterbalancing-weights
applied to said frame, substantially as specified.
11. The combination with the endless carrier having a series of endless buckets
arranged to discharge abrading material at points above the stone, of a series of
pockets arranged to receive the material discharged from the said buckets, a series
of conducting-channels movably connected to the said pockets, a second series of
channels into which the first-named series are arranged to discharge, and receivers.
which catch the material from said channels and supply it to the saws, substantially
as specified.
12. In a stone-sawing machine, the slotted stone-clamp having a hook portion at
one end and having its slot closed at the opposite end, a series of blocks adapted to-
be inserted through said slot, and a wedge or key also adapted to be driven
through said slot, substantially as, and for the purpose described.
13. In a stone sawing machine, parallel screw rods on each side of a slotted end
bar, half nuts adapted to engage the threads of said rods, and also grooved to.
engage the end portions of the saws, each of said end portions being held between
a pair of said half nuts, substantially as specified.
14. In a stone sawing machine, the combination with the saw frame having the
slotted or split end bars the slots whereof are provided with opposite laterally-
offset recesses, of the screw rods seated in said recesses, the half nuts engaging said
rods and placed opposite to each other on each pair of the rods, and saw-blades.
having thickened central portions whose ends engage grooves in the said nuts,
said blades also having thinner portions at each side, each of which is notched to
form a saw, substantially as specified.
JAMES PECKOVER.