IMPROVEMENTS IN MACHINERY OR APPARATUS FOR SAWING STONE, MARBLE, GRANITE, OR OTHER MINERALS
Year: 1879

page_text: LETTERS PATENT to George Henry Rusby, of Denby, near Huddersfield, in the
County of York, Stone Merchant, for the Invention of "IMPROVEMENTS IN
MACHINERY OR APPARATUS FOR SAWING STONE, MARBLE, GRANITE, OR OTHER
MINERALS."
Sealed the 11th June 1880, and dated the 15th December 1879.
PROVISIONAL SPECIFICATION left by the said George Henry Rusby at the
Office of the Commissioners of Patents on the 15th December 1879.
GEORGE HENRY RUSBY, of Denby, near Huddersfield, in the County of York,
Stone Merchant. "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR SAWING
STONE, MARBLE, GRANITE, OR OTHER MINERALS."
This Invention relates to certain improvements in stone sawing machinery, and
consists of a new form of skeleton frame for sawing stone, marble, granite, or other
minerals, by means of which (with its appendages) a greater quantity of work can
be done than by other frames now in use. The machine consists of,-
Firstly. A stone sawing frame without any sides, having only a front beam and
peculiarly formed back beam. The sawing plates are tightened by means of rods
or plates fastened to an ear on each end of the upper part of the front or breast
beam, and also fastened to an ear on the upper part of the back beam. Through
the centre of the breast and back beams runs a cylindrical shaft working in brasses
in roller carriages (hereafter described), and binding against the face of the upright
pillars at the end of the frame the sawing plates are cottered, keeping them
perfectly tight by the resistance of the rods or plates fastened to the upper
ears.
•
Secondly. This improved frame works on centres or pivots instead of swinging
loosely by chains. The breast beam and back beam are each keyed to a cylindrical
shaft, which works in brasses in the roller carriages. These roller carriages have
each several rollers to enable it to move freely up or down the face of the upright
pillars. Each roller carriage has a projection fitted with steps to carry the end of
the cylindrical shaft and allow the said shaft to move with a partial rotary or
rocking motion.

page_text: •
Thirdly. The roller carriage is carried by a chain fastened to its upper end.
This chain passes up the face of the pillar and over a pulley at the top of the
pillar; then passes along the top beam and round a grooved or spiked wheel, which
is keyed to a shaft passing from one side to the other of the centre of the top
beams. The chain then passes back along the top beam, over a second pulley at 5
the top of the upright pillar, down the face of the pillar, under a pulley at the foot
of the pillar, passes up the face of the pillar to the lower end of the roller carriage,
where it is fastened.
Fourthly. For lengthening or shortening the connecting rod or shaft I employ a
boss (bollowed and with a cap) in the excentric, in which boss a screwed rod 1
working in a tube with threads on the end of the connection shaft, and is worked
by the motion of the frame by means of a cog-wheel and ratchet-wheel and ratchet,
and so lengthens or shortens the shaft self-actingly.

page_text: Secondly. The combination of beams, such as B and C, working upon centres or
shafts, such as K, K, in the manner and for the purpose as illustrated and
described.
Thirdly. Roller carriages, such as M, M (for carrying the sawing frame), as
illustrated and described.
In witness whereof, I, the said George Henry Rusby, have hereunto set my
hand and seal, this Twelvth day of June, in the year of our Lord One
thousand eight hundred and eighty.
Witness,
JOHN E. WALSH,
GEORGE HENRY RUSBY. (L.S.)
Patent Agent, Consulting Engineer, and Mechanical Draughtsman,
Crossley Street,
Halifax,
And 30, East Parade,
Leeds.