IMPROVEMENTS IN MACHINERY FOR CUTTING OR DRESSING STONE AND OTHER MINERALS."
Year: 1880

page_text: LETTERS PATENT to James Holgate, of Burnley, in the County of Lancaster,
for an Invention of "IMPROVEMENTS IN MACHINERY FOR CUTTING OR
DRESSING STONE AND OTHER MINERALS."
PROVISIONAL SPECIFICATION left by the said James Holgate at the Office
of the Commissioners of Patents on the 18th November 1880.
2
JAMES HOLGATE, of Burnley, in the County of Lancaster. IMPROVEMENTS IN
MACHINERY FOR CUTTING OR DRESSING STONE AND OTHER MINERALS."
This Invention relates to that class of machinery for dressing stone in which the
stone is placed upon a sliding or travelling bed or table. My Invention consists in
employing one or more cylinders placed one behind another and caused to revolve
in the same direction, each cylinder having different widths or kind of cutters fixed
thereto, the first cylinder having narrow cutters to take the rough off the stone, the
second or following cylinders having broad or other suitably shaped cutters to finish
the work done by the narrow cutters, whereby the stone is cut and dressed at one
operation. By means of gearing and screws the cylinders can be raised and
lowered together without disturbing their relative positions; or one cylinder can be
raised and lowered independently of the other for adjusting purposes. The cylinders
are driven by means of pinion and spur wheel fixed on the axis of one cylinder,
from which the second or following cylinders receive their motion. On the axis of
each cylinder is fixed a spur wheel in gear with one or more pinions, the bearings
or pedestals of which are supported by and capable of moving up and down in a
radial arm or circular slot, and are connected by links to the shaft adjoining in such
manner as to allow any cylinder being adjusted and still remain in gear. The
table or bed carrying the stone is made to have both quick advance and return
motions by means of open and crossed driving belts, and also a slow advance motion
from the same source for cutting purposes, and this is accomplished by a friction
cone carrying a long revolving pinion and working in gear with two spur wheels
of varying number of teeth, one being a "dead" wheel and the other fixed on the
main driving shaft. By means of lever and clutch the long pinion is made to slido
in and out of gear to admit of the quick motion to the table.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Holgato in the Great Seal Patent Office on the 18th May
1881.
JAMES HOLGATE, of Burnley, in the County of Lancaster. "IMPROVEMENTS IN
MACHINERY FOR CUTTING OR DRESSING STONE AND OTHER MINERALS."
This Invention relates to that class of machinery for dressing stone in which
the stone is placed upon a sliding or travelling bed or table. My Invention consists
in employing two or more cylinders placed ono behind another and caused to
revolve in the same direction, each cylinder having different widths or kind of
cutters fixed thereto, the first cylinder having narrow cutters to take the rough off*
the stone, the second or following cylinder having broad or other suitably
shaped cutters to finish the work done by the narrow cutters, whereby the
stone is cut and dressed at one operation. By means of gearing and screws
the cylinders can be raised and lowered together without disturbing their relative
positions, or one cylinder can be raised and lowered independantly of the other for
adjusting purposes. The cylinders are driven by means of pinion and spurr wheel
fixed on the axis of one cylinder, from which the second or following cylinders
receive their motion. On the axis of cach cylinder is fixed a spurr wheel in gear
with one or more pinions, the bearings or pedestals of which are supported by and
capable of moving up and down in a radial arm or circular slot, and are connected
by links to the shaft adjoining in such manner as to allow any cylinder being
adjusted and still remain in gear. The table or bed carrying the stone is made to
have both quick advance and return motions by means of open and crossed
driving belts, and also a slow advance motion from the same source for cutting
purposes, and this is accomplished by a friction conc carrying a long revolving
pinion and working in gear with two spurr wheels of varying number of teeth, one
being a "dead" wheel and the other fixed on the main driving shaft. By means of
lever and clutch the long pinion is made to slide in and out of gear to admit of the
quick motion to the table.
In order that my Invention may be more fully understood, I herein give reference
to the accompanying Sheets of Drawings illustrative thereof.
Fig. 1 represents a plan view of my machine, and Fig. 2 is a front end elevation ;
Fig. 3 is a portion of a longitudinal elevation. A is the travelling bed or table
upon which the stone is mounted. This table rests upon antifriction pullies B, and
to the underside is fixed a rack C which gears with a pinion D mounted upon a
shaft E, on the other end of which is a toothed whcel F, which gears with a
pinion G on the driving shaft H. On this shaft are mounted a fast pulley J and
two loose pullies K, L. To the pulley K is attached one half of a friction or clutch
box M, and to the other half N of the said friction box is fixed a plate O carrying
a stud P, upon which is mounted a loose pinion Q. The parts N and O are both
loose upon the shaft H. To the boss R is fixed a dead or stationary wheel S, and
by the side thereof a toothed wheel T of the same diameter but of different pitch or
number of teeth is fixed upon the shaft. For driving the table I employ two
belts, one straight and the other crossed, either of which may be caused to run upon
the fast pulley J, and by so doing communicate a fast motion to the table A in
either direction.
When however a slow cutting motion is required the belts are thrown onto the
loose pullies K and L, and the clutch box M, N, thrown into gear, by which means
the broad pinion Q is caused to gear with both the wheels S and T around which
it revolves, the stationary wheel causing the pinion Q to revolve upon its own
axis P, and in consequence of the different pitch to communicate slow motion to the
wheel T, and through it to the travelling table.

page_text: I
The cutter cylinders a and b are mounted in brackets c and d. The brackets c
are capable of being raised and lowered upon the pedestals e by means of right and
left hand screws f connected by bevil gearing g and shaft h. The brackets & are
attached to the brackets c and capable of sliding thereon, screws i and worm and
wheel gearing being provided for operating the same. When adjusted the
brackets are secured by bolts . The cutter cylinders may thus be raised and
lowered together, or one may be raised or lowered independantly of the other. The
arms attached to the bracket c carry the shaft m, upon which are mounted driving
pullies and pinions o, which gears with a spurr wheel p on the shaft of the
cylinder a. Each cylinder shaft carries a toothed wheel q connected by inter-
mediate which runs in bearings in the slot 8, which is curved to the radius of the
shaft a.
This pinion is connected with the shaft b by means of arms t. When
the cylinders are raised or lowered together the gearing moves along therewith,
but if the cylinder bis moved alone then the arms t guided by the slots move the
intermediate 7, which must necessarily remain in gear with the wheels g.
Having thus described the nature of my Invention, and the manner in which the
same is to be performed or carried into practice, I would have it understood that I
claim as my Invention,―
Firstly. The construction and arrangement of the parts lettered K to T inclusive
for imparting either fast or slow motion to the bed or table, substantially as herein
shewn and described.
Secondly. The peculiar construction of the brackets c and d, whereby the same
can be adjusted upon the pedestal e either together or independently, in manner
substantially as herein shewn and described.
Thirdly. The employment of arms t and curved slot s for adjusting and supporting
the pinion, at the same time keeping the same in gear with the wheels Q, as hercin
shewn and described.
In witness whereof, I, the said James Holgate, have hereunto set my hand
and seal, this Sixteenth day of May, in the year of our Lord One thousand
eight hundred and eighty one.
JAMES HOLGATE. (L.S.)