Improvements in and relating to Stone Sawing Machinery.
Year: 1896

page_text: Date of Application, 5th Feb., 1896
2000
CIL
1000
PROVISIONAL SPECIFICATION.
Improvements in and relating to Stone Sawing Machinery.
I, GEORGE ANDERSON, of the Firm of George Anderson & Co.,, Engineers and
Founders, Arbroath, in the County of Forfar, Scotland, do hereby declare the
nature of this invention to be as follows:-
My invention relates to improvements in stone sawing machinery of the type in
which the stone is placed and properly secured upon a removable table or bogie
while being acted upon by reciprocating saws, such saws consisting of either plain
metal blades, or of blades provided with diamonds; the objects being to actuate
and to readily control the application of the saws; to regulate the feed and
generally to improve the design and action of euch machinery.
The frame of the machine consists of four upright columns or pillars, two ou
each side of the saw or swing frame. Such frame is made to reciprocate, preferably
by means of a steam, gas, or other prime mover. Such prime mover is placed. at
one end of the saw frame and is preferably composed, along with the other usual
parts, of say a steami cylinder whose centre line coincides with the longitudinal and
central plane of the saw frame, a horizontal cross-head of special construction-in
length about equal to the width of machine-to which two connecting rods.from
the saw frame are coupled, one on each side of the cylinder and' of the saw frame,
the usual crank and connecting rod and one, or two fly wheels. The connecting
rods are coupled to the end of the saw frame furthest away from the prime mover,
in order that such connecting rods may be of maximum.length.
The saw frame is suspended by means of peudulums from slides which move on
upright guides fixed to the insides of the upright columns-one on each-the
position of such slides, and therefore of the saw frame as to rising and falling
being determined by means of four wire ropes or chains controlled by a central
barrel. The above mentioned connecting rods move in spaces between the inside
of the columns and the guides for the slides. The saws are fed down upon the
stone, when cutting, by means of the barrel and ropes actuated by a vibrating
lever whose motion is preferably determined by an eccentric on the crank shaft of
the engine, the position of its coupling rod being adjustable in order that a varying
feed may be obtained. This connecting rod actuates a friction gripper or silent
feed which intermittently moves a pulley on a shaft, which gears, by means of
spur wheels with the barrel shaft. Such barrel may be moved slowly by the above
mentioned feed motion, or it may, by a clutch, rope and pulley, or pulleys and
belts, be adjusted to actuate the saw frame quickly. The aforesaid lever is so
designed, that the feed, by a simple movement may be quickly thrown out of gear.
In the steam engine, the steam is distributed to the cylinder in the most
approved manner; that is to say it may be worked expansively and cushioned by
initial or exhaust steam: It may work in combination with a separate or air
cushioned cylinder or dash pot. The bogie upon which the stone is carried is
preferably surrounded or provided with a basin or basins into which the water,
grit or chilled' shot falls, such shot being retained for future use.
Dated this 2nd dow of War 18OR
GEO. C. DOUGLAS & Co.,
41 Reform Street, Dundee, Agents for Applicant.

page_text: Improvements in and relating to Stone Sawing Machinery.
I, GEORGE ANDERSON, of the Firm of George Anderson & Co., Engineers and
Founders, Arbroath, in the County of Forfar, Scotland, 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 :-
My invention relates to improvements in stone sawing machinery of the type in
which the stone is placed and properly secured upon a removeable table or bogie
while being acted upon by reciprocating saws, such saws consisting of either plain
metal blades, or of blades provided with diamonds; the objects being to actuate
and to readily control the application of the saws; to regulate the feed and
generally to improve the design and action of such machinery.
And in order that my said invention and the manner of performing or carrying
the same into effect or practice may be properly understood, I have hereunto
appended three explanatory sheets of drawings in which the same reference
numerals are used to indicate corresponding parts in all the figures where shown.
Figure 1. is a side elevation of a machine and Figure 2. an end view of same,
showing it driven by a steam engine.
Figure 3. is a side view and Figure 4. an end view showing the arrangement for
driving the machine by a belt.
Figures 5. and 6. are respectively face and side views in detail of the pendulum
arrangement, while Figure 7. is a cross-section at A. A. and Figure 8. a cross-section
at B: B. (Figures 5. and 6.).
Figures 9. and 10. are detail side views showing how the feed motion is actuated,
Figure 9. showing the arrangement adopted in the steam engine and Figure 10.
that in connection with the belt
gear.
Figure 11. shows a detailed side elevation of the silent feed.
The frame of the machine consists of four upright columns or pillars 20, two on
each side of the saw or swing frame 21. Such frame. is made to reciprocate,
preferably by means of a steam, gas or other prime mover 22. Such prime mover
is placed at one end of the saw frame, and is preferably composed, along with the
other usual parts of say a steam cylinder 23, whose centre line coincides with the
longitudinal and central vertical plane of the saw frame, a horizontal cross-head 24.
of special construction-in length about equal to the width of the machine-to
which two connecting rods 25. from the saw frame are coupled, one on each side of
the cylinder aud of the saw frame, the usual crank 26. and connecting rod 27. and
one, or two fly wheels 26. The connecting rods 25. are coupled to the end of the
saw frame furthest away from the prime mover, in order that such connecting rods
may be of maximum length.
The saw frame is suspended by means of pendulums 29. from slides 30. which
move on upright guides 31. fixed to the insides of the upright columns-one on
each-the position of such slides, and therefore of the saw frame, as to rising and
falling being determined by means of four wire ropes or chains 32. controlled by a
central barrel 33. The above mentioned connecting rods 25. move in spaces
between the inside of the columns and the guides, for the slides. The saws 34. are
fed down upon the stone 35. when cutting, by means of the barrel 33. and ropes 32.
actuated by a vibrating lever 36. whose, motion is preferably determined by an
eccentric 37. on the crank shaft of the engine, or on the shaft of the belt driving
gear, the position of its coupling rod being adjustable, in order that a varying feed
may be obtained, that is to say according to the position of the slide 38. on the
vibrating lever 39. so will the travel of such rod be; more or less. This connecting
rod 36. actuates a friction gripper or silent feed, consisting of a lever 40. vibrating
..

page_text: on the shaft 41. and a lever 42. which, hinged to the lever 40, intermittently moves
a pulley 43. The shaft ou which the pulley 43. is fixed, gears by means of spur
wheels 44. with the barrel shaft 41 a. Such barrel may be moved slowly by the
above mentioned feed motion, acting through the clutch 45. or it may by means of
a rope and pulley, or pulleys 46. and crossed and open belts 47. be adjusted to raise
or lower the saw frame quickly. The aforesaid lever 36. is so designed, that the
feed by a simple movement of the hand lever 48. may be quickly thrown out of
The other hand levers 49. and 50. respectively determine the position of the-
open and crossed belts upon the fast pulley 51.
In the steam engine, the steam is distributed to the cylinder in the most approved
manner; that is to say it may be worked expansively and cushioned by initial or
exhaust steam. It may work in combination with a separate or air cushioned
cylinder or dash pot. The bogie 52. upon which the stone is carried, is preferably
surrounded or provided with a basin or basins into which the water, grit or chilled
shot falls, such shot being retained for future use.
The saw frame 21. is suspended unequally so that the weight of the connecting
rods 25. may not cause the saws to press unequally on the stone. In the belt.
driven arrangement (Figures 3. and 4.) the connecting rods are counterbalanced
by weights 53. and the fast pulley 28. is also a flywheel.
In using the machine the stone to be cut is laid and adjusted on the bogie 52.
which is then rolled into position beneath the saws. The engine or the belt gear
is set in motion thus causing the saw frame to vibrate. It is lowered quickly by
means of the open belt 47. and when the saws touch the stone, such quick feed is.
stopped and the silent feed brought into action by means of their respective han l
levers.
Having now particularly described and ascertained the nature of my said inve
tion and in what manner the same is to be performed, I declare that what [
claim is :-
(1.) In stone sawing machinery, the combination and arrangement of parts,.
substantially as herein before described with reference to Figures 1. 2. 5. 6. 7. 8. 9..
and 11. of the accompanying drawings.
(2.) In stone sawing machinery, the combination and arrangement of parts,
substantially as herein before described with reference to Figures 1. 2. 3. 4. 5. 6. 7...
8. 10. and 11. of the accompanying drawings.
(3.) In stone sawing machinery, the combination and arrangement of parts
which go to form the silent feed, substantially as herein before described and.
illustrated with special reference to Figures 9. 10. and 11.
Dated this 17th d...
1000
GEO. C. DOUGLAS & Co.,
41 Reform Street, Dundee, Agents for Applicant..