IMPROVEMENTS IN MACHINERY FOR SAWING Stone
Year: 1873

page_text: LETTERS PATENT to Joseph Sutcliffe Gabriel, of Grelliers' Wharf,
Belvedere Road, in the County of Surrey, for the Invention of
"IMPROVEMENTS IN MACHINERY FOR SAWING Stone.”
Sealed the 20th May 1873, and dated the 20th February 1873.
PROVISIONAL SPECIFICATION left by the said Joseph Sutcliffe Gabriel
at the Office of the Commissioners of Patents, with his Petition,
on the 20th February 1873.
I, JOSEPH SUTCLIFFE GABRIEL, of Grelliers' Wharf, Belvedere Road,
in the County of Surrey, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN MACHINERY FOR SAWING STONE," to be as
follows:-
:-
This Invention has for its object improvements in machinery for
sawing stone..
In order to drive the saw frame a pendulous beam is employed,
suspended by its upper end. To give motion to this beam a crank is

page_text: formed upon the engine shaft, and by two connecting rods this crank is
coupled with slides working in guides. From the slides a return con-
necting rod passes to the pendulous beam.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Joseph Sutcliffe Gabriel in the Great Seal Patent
Office on the 20th August 1873.
.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPH
SUTCLIFFE GABRIEL, of Grelliers' Wharf, Belvedere Road, in the
County of Surrey, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twentieth day of February, in the year
of our Lord One thousand eight hundred and seventy-three, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Joseph Sutcliffe Gabriel, Her special
license that I, the said Joseph Sutcliffe Gabriel, my executors, adminis-
trators, and assigns, or such others as I, the said Joseph Sutcliffe Gabriel,
my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN MACHINERY FOR SAWING STONE," upon the condition
(amongst others) that I, the said Joseph Sutcliffe Gabriel, my exe-
cutors or administrators, by an instrument in writing under my, or
their, or one of their hands and seals, should particularly describe and
ascertain the nature of the said Invention, and in what manner the
same was to be performed, and cause the same to be filed in the Great
Seal Patent Office within six calendar months next and immediately
after the date of the said Letters Patent.

page_text: is to be performed, to be particularly described and ascertained in and
by the following statement thereof, that is to say :-
The object of this Invention is to economise space in the arrangement
of stone sawing machinery. For this purpose the motion is taken by
connecting rods from a crank upon a shaft to a slide, and from this slide,
which is situate beneath the stone to be operated on, a return connecting
rod passes to a pendulous beam, and to a sliding block on this beam the
saw frame is coupled. The beam is made of two pieces of timber firmly
bolted together, and the timbers are recessed so as to form between them
a guide slot for the sliding block. The timbers receive iron cheek plates
to form the sides of the slot, and when the cheek plates wear they can
be set up by screws passing through the timber and supporting them at
the back.
machine for sawing stone constructed according to my Invention.
a is the main shaft; it is driven from the engine shaft A by a belt,
and made in sections or lengths; a¹, a', are discs mounted upon it and
carrying a crank pin; b, b, are two connecting rods passing from this
crank to the slide c which works in the guides d; e is the return
connecting rod coupling the slide c with the block f, which is able to
traverse along the guide slot in the pendulous beam. As already
mentioned this beam consists of two pieces of timber g, g, which are
bolted together longitudinally, and they are each cut away or recessed
to form the guide slot. 91, 92, 93, are cast-iron cheek plates lining the
slot g'. They are set up and adjusted by the screws g³, g³, at their backs.
g' is the pin or axis from which the beam is suspended. It is carried by
a frame which is marked h. i is the saw frame; it is connected by
couplings with the block f. The saw frame may be constructed in the
usual way, and it is partially suspended by the chains 2, 2. Each
chain is attached to the saw frame at the end opposite to the pendulous
beam; it rises over a guide pulley and then passes horizontally to a

page_text: drum on the shaft . The chain takes a complete turn round this
drum, passes half round the pulley to which the counterweight & is
attached, then returns to the drum and makes another complete turu
around it. From the drum the chain passes away horizontally to a
guide pulley, and descends to the saw frame at the end next to the t
pendulous beam. The drum shaft can be turned by bevilled gear,
and a hand wheel to lift the saws when necessary. h¹, h¹, are rubbing
pieces on the frame which serve to guide the saw frame i. The stone to
be sawn is represented at k; it is supported over the pit in which the
slide c and its guides d are sunk. This pit is closed over with masonry 1
or brickwork, suitable passages being left to afford access to the enclosed
machinery.
In place of the slide c and guides d a lever may be used rocking about:
a centre at its lower end, but the arrangement shewn by the Drawings is
that which I prefer.
In erecting a number of sawing machines such as I. have described,.
I arrange them in two rows, end to end, with the engine shaft passing
along between the two rows. Thus a great economy of space is effected
without in any way cramping the machines, and the arrangement is also
in other respects more advantageous than that usually adopted.
An important feature in this Invention, and that from which the
economy of space mainly results, is, the arrangement of the connecting
rod which actuates the pendulous beam beneath the stone which is being
worked.
:
The arrangement may be modified by dispensing with the slide c and 2
putting in its place the crank axis a, so that the connecting rod which
is beneath the stone may take its motion directly from the crank axis.
But as already mentioned the arrangement which the Drawings shew is
that which I prefer.
Having thus described the nature of my said Invention, and the a
manner of performing the same, I would have it understood that I'do
not confine myself to the exact details described, but I claim,-
1st. The method of actuating saws for sawing stone by means of a
pendulous beam driven by a connecting rod situate beneath the stone
which is being worked, substantially as described.

page_text: 2nd. The method of actuating saws for sawing stone by means of a
crank a¹, connecting rods 6 and e, slide c, or its equivalent, and pendulous
beam, substantially as described.
3rd. The construction of the pendulous beam with the parts 9, 9,
cheek plates g³, g³, and sliding block f, all substantially as described.
In witness whereof, I, the said Joseph Sutcliffe Gabriel, have here-
unto set my hand and seal, this 19th day of August, in the year
of our Lord One thousand eight hundred and seventy-three.