Improvements relating to Stone Sawing and like Machines.
Year: 1897

page_text: Complate Ona
Date of Application, 6th Feb., 1897
ce
1000
PROVISIONAL SPECIFICATION.
Improvements relating to Stone Sawing and like Machines.
I, AUGUSTE EDOUARD LEROY, of Boulogne on the Seine, in the Republic of
France, Master Builder, do hereby declare the nature of this invention to be as
follows:-
This invention relates to stone sawing machines.
My invention has for its object to supply a want by remedying a defect common
to the different systems of stone sawing machines heretofore known, which,
necessitating the expenditure of a considerable amount of work in manipulating
the stone for putting the blocks to be cut in their place in the machine, are the
cause of a no less considerable diminution in the production for the same outlay,
and of the important delays necessary in the delivery of the blocks to be cut.
With the systems heretofore employed which are not adapted to be displaced
each machine is rendered immovable and is consequently idle during the whole
time necessary for the removal of the material cut and for its replacement by that
which is to be cut; which work for an ordinary frame requires several days, which
will be easily understood if it is observed that with these systems the place which
the material to be cut must occupy is absolutely fixed in an immutable manner
as also the exact direction of the saw cuts to be made, so that the cost of putting
this material in the yard is very high.
The system which I have devised and which I will hereinafter describe is
arranged to be displaced and consequently obviates a great portion of the manipu-
lation and transport of the stone. When it has to be employed upon a permanent
yard it may be mounted upon a frame similar to that of bridge cranes employed
for loading and unloading stones by railway companies and such as may be seen
at stone depôts on the Chemins de fer du Nord, de l'Est, d'Orleans etc. in Paris,
and is therefore capable of displacement from one end of the way to the other.
Besides this displacement in positions which are parallel to each other, it has
been devised so as to permit of an angular deviation to the right and left, thus
diverging from this parallelism to a considerable extent.
In this case the blocks may be put in the yard along the entire part of the yard
comprised in the space occupied by the way carrying the frame of the sawing
machine; moreover by reason of the angular deviation allowed by the construction
of the machine it is not necessary that the saw cuts to be made should be in a
direction strictly determined with regard to the way.
In the case of temporary yards the system is simply mounted upon a special
carriage, the description of which need not be given here.
The motion of translation of the vertical bar is obtained (although it may be
effected by other means) by the displacement of two slides mounted upon journals
at two symmetrical points of the discs placed in vertical planes and which are
adapted to turn about their axes in opposite directions.
The movement of the discs is obtained by means of bevel wheels fixed upon the
same shafts as these discs and actuated by two other bevel wheels fixed upon the

page_text: same vertical shaft which receives its gyratory movement directly or indirectly
from the motor. The movement of the frame in a direction differing from that
of the translation of the vertical bar is obtained through the medium of two racks
and the toothed part composed of a circular toothed wheel gearing below the upper
rack and an eccentric toothed wheel gearing upon the lower rack; these two
toothed wheels being connected.
The upper rack fixed to a bar which slides in two guides fixed, like the shaft
about which turns the toothed part and the rollers supporting the frame, upon a
frame (movable only in the upward and downward direction) and connected by
slides to the frame of the system, receives its to-and-fro movement from the motion
of translation of the vertical bar to which it is united by a sliding piece at the
periphery of the said bar, enabling it to follow the upward and downward move-
ment of the frame on the one hand and the motion of translation of the vertical
bar on the other hand.
This upper rack transmits to the concentric toothed wheel of the toothed part
a rotary movement which the latter communicates to the eccentric wheel with
which it is connected. This eccentric wheel in its turn communicates to the
lower rack a movement opposite in direction to that of the upper rack. The
lower rack actuates the frame with which it forms one piece.
The toothed part comprises a toothed wheel the object of which is to accelerate
the speed of the movement of the frame in the middle of the stroke and to gradually
lessen this speed on approaching the ends of this stroke for the purpose of destroy-
ing the recoil.
The proportion of eccentricity of this wheel depends on the values of the
momenta (1) of the parts imparting its movement to the toothed part on the one
hand and (2) of those receiving their movement from this part on the other hand.
In the machine herein before set forth the value of the momentum or force of
inertia of the parts imparting movement to the toothed part is less than that in
opposition.
It is evident that at whatever place the system operates, and whatever may be
the angular displacement of the same, the horizontal projection of this axis
of the vertical shaft being taken as the top, the position of this shaft and also of
all the parts composing the system being constant relatively to the frame, the
movement will always take place if this shaft is actuated by a gyratory motion.
1 may mention that I may use other means for effecting movements similar to
those obtained with the machine herein before described.
Dated this 6th dov of Wal 1807
HASELTINE, LAKE & Co.,
45, Southampton Buildings, W.C., Agents for the Applicant.
Improvements relating to Stone Sawing and like Machines.
I, AUGUSTE EDOUARD LEROY, of Boulogne on the Seine, in the Republic of
France, Master Builder, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement:
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This invention relates to stone-saw-mills and similar machines and it consists
of a complete arrangement of movable (or sliding) machine-driven saws, while it
has especial reference to certain devices enabling the required reciprocating recti-
linear motion to be imparted to the frame carrying the saw blade or blades without
any shock or jar.

page_text: The object of the invention is to remedy the inconveniences attending the
various types of saw-mills now in use, inasmuch as the sawing machine, which
forms its subject, is adapted to travel from end to end over the entire length of
the saw yard after the style of a bridge crane or the like and at the same time to
accommodate most of the positions that the blocks of stone placed in its path may
happen to occupy. It will therefore be seen that it does away with the necessity
of accurately setting the masses of stone in the direction of the saw-frame, an
operation which takes up considerable time and reduces the output in proportion.
And furthermore this invention affords an advantage of particular importance in
that it is driven and controlled by operating mechanism of very compact con-
struction, admitting of no reaction, recoil, or reverberative effect.
The invention will be best understood by reference to the accompanying draw-
ings, in which :-
Figure 1 is a longitudinal elevation of a sliding saw-mill constructed in accor-
dance with my invention.
Eigure 2 is a longitudinal section taken on the line 2-2 Figure 1.
Figure 3 is an elevation of the end at which the operating mechanism is located.
Figure 4 is a diagrammatic plan showing the saw-mill at an angle to the axial
line of the path or track along which it travels;
Figure 5 is an elevation upon an enlarged scale of one of the extremities of
the saw-mills, viz. that which comprises the mechanism for operating the frame
which supports the blade or blades; the frame itself being shown in section on
line 5-5 Fig. 6;
Figure 6 is a vertical section on line 6-6 Figure 5; and
Figure 7 is a horizontal section on line 7-7 Figure 5.
The complete saw-mill comprises the following parts: -(1) Two trucks X and X¹
(Figures to 4) mounted on wheels and adapted to travel along two parallel tracks
or rails (2) A strong supporting frame Y in the form of a bridge or plat-
form, the feet of which are screwed to plates y and y' respectively, one of which
plates is pivoted at on the carriage X after the manner of a turn-table, while the
other is capable of sliding on, the carriage X' whereon it is adapted to be locked
in position by means of a pin when it has completed its movement or stroke;
(3) A frame Z wherein one or more saw-blades are fitted and which is suspended
in the frame Y by means of chains which enable the said frame Z to be raised
or lowered at will; and (4) Special motion-transmitting mechanism facing one.
of the standards of the frame Y and adapted to impart rectilinear reciprocating
motion to the frame Z under pre-determined conditions.
This transmitting mechanism (Figures 1, 2 and 3) comprises one or two rigid
vertical bars A properly guided at the top and bottom and each connected by
slide-ways B and C to the journals and of the two plates D and E situated in
the same vertical plane and turning in opposite directions, as indicated by the
arrows. The said plates D and E are connected for the purpose of rotation, with
two pairs of bevel gear wheels bc and ble¹. The gear wheels and are keyed,
respectively, on the shafts carrying the plates D and E; while the gear wheels c
and are similarly screwed on the vertical shaft F the axis of which is in a line
with that of the pivot of the turn-table y mounted upon the carriage X.
This vertical shaft F receives motion from any suitable motor or engine through
the medium of a strap W (Figures 2 and 3) extending over the entire length of
the track or course and passing over the pulley P of the motor at one end of
the said track; then over a counter-shaft-pulley situated at the opposite end of the
track and omitted from the drawings; next over a pulley secured on the
shaft F and lastly over the adjacent pulley 7. A pulley serves to impart to
the strap W the requisite degree of tension. I do not however limit myself
strictly to this arrangement which is only described here by way of example.
Upon each of the bars A the eye or terminal fork h of a bar H is adapted to
move in two slide ways I and I' (see Figures 5, and 7) connected with a frame
or carriage K which may be caused to move vertically opposite the corresponding

page_text: standard of the main frame or platform Y acting as a guide for such carriage.
This carriage or frame K is provided with rollers & over which is passed a suspension
chain belonging to the frame Y. It thus in conjunction with the device
attached to it serves as an intermediate device between the said suspension
chain and the frame %.
9
Each of the bars H comprises a rack e (Figures 5, 6 and 7) in gear with a
pinion concentric with the shaft G supporting it and the journals of which are
mounted in the carriage K. Upon the said shaft G there is also rigidly secured an
eccentric pinion j, being in gear with a rack m of suitable shape, which should
constantly engage with the said pinion. The rack m is connected with the
frame Z.
As will be seen the rack e participates in all the movements of the bar A and
transmits them to the pinion g which through the medium of the eccentric
pinion conveys such movements to the rack m but in the opposite direction,
as indicated by the arrows (Figure 5) and also, consequently to the frame Z which
always travels in the direction opposite to that followed by the bar A.
It will be observed that in view of the eccentric arrangement of the pinion j
the rack m is inflected or curved in its central part, with the result that the speed
of motion of the said rack and also consequently that of the frame Z is accelerated
in the middle of its stroke and retarded towards the ends thereof. The object
of this variation of speed is to reduce vibration and concussion. The proportion
of eccentricity of the pinion depends upon the eis inertice of the parts, viz. both
those which impart motion to the pinions g and j and those which receive motion
from these pinions.
At all events-bearing in mind the fact that it is this method of transmission
of motion to the frame Z that constitutes the essential part of the invention,-I
will now describe the operation of the improved saw-mill as a whole.
Suppose the stone-blocks to be located within the paths or tracks al no matter
in what position, but substantially at right angles to the said tracks. In order to
saw these blocks, the frame or platform Y, mounted upon the carriages X and X¹,
is moved up in front of one of the blocks, the frame Z being, of course raised.
The said frame Y is then set in the direction of the stone by the relative displace-
ment of one of the carriages X X¹ (Figure 4), and when this has been done, the
sliding plate y is firmly secured to its carriage X¹ so as to keep up the angular
deviation which has been given to the said frame Y (Figure. 4). After this the
motion transmitting mechanism above referred to is set in operation and the
frame which has a rectilinear reciprocating movement imparted to it, as before
stated, is at the same time gradually lowered by means of the chain u. It will be
observed that the driving gear in question will operate just the same no matter
what may be the angle of inclination of the frame Y to the tracks a ¹, since the
vertical driving shaft F (as shown in Figures 1, 2, 3 and 4) coincides with the axial
line of the pivot z provided in the carriage X.
It will be understood that this motion-transmitting or driving mechanism may
be single instead of being double as it has been assumed to be in the foregoing
description, without this making any difference either in the result attained or
the effects produced.
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
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1. In reciprocating saw-mills, the transmission of motion from the motor-engine
to the frame or the mounted saw through the medium of one or more rigid bars
which are arranged vertically and adapted to move in parallel positions in a
vertical plane whose direction, in horizontal projection, is the same as or parallel
to the desired direction of the outs of the saw; and which impart motion to the
said frame or saw in a direction opposite to that following by themselves, so as to
tend to balance the thrusts arising on the one hand from the motion of the said

page_text: rigid bar or bars, and on the other hand from the motion of the said frame or
saw.
2. In reciprocating saw-mills the combination of one or more rigid bars A
operated by plates or discs such as D, E, acting as cranks, with bars such as H,
each of which is provided with a rack e, and pinions g and j, one of which is con-
centric with its shaft and in gear with the rectilinear rack e, while the other is
eccentric and engages with a rack m, which is curved to accommodate the said
eccentric pinion and supported by the saw-blade carrying frame %, all arranged
and operating as and for the purpose specified.
3. The saw arrangement with means for imparting reciprocating motion to the
frame and the saw blades fitted therein, adapted to cut stone and capable of moving
and of being brought up to the parts of the yard where the blocks of stone to be
cut are lying; such arrangement, both in its complete form and in its details,
agreeing with the above description and the accompanying drawings in which the
mechanism is exemplified.
Dated this 2nd day of Nawaban 1807
HASELTINE, LAKE & Co..
45, Southampton Buildings, London, W.C., Agents for the Applicant.