IMPROVEMENTS IN MACHINERY FOR CUTTING COAL AND OTHER MINERALS
Year: 1873

page_text: LETTERS PATENT to George Warsop, of 76, Royal Terrace, and Henry
Walker Hill, of 51, Hampden Street, both of Nottingham,
Engineers, for the Invention of "IMPROVEMENTS IN MACHINERY FOR
CUTTING COAL AND OTHER MINERALS.”
Sealed the 27th March 1874, and dated the 4th October 1878.
PROVISIONAL SPECIFICATION left by the said George Warsop and
Henry Walker Hill at the Office of the Commissioners of Patents,
with their Petition, on the 4th October 1873.
We, GEORGE WARSOP, of 76, Royal Terrace, and HENRY WALKER
HILL, of 51, Hampden Street, both of Nottingham, Engineers, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
MACHINERY FOR CUTTING COAL AND OTHER MINERALS," to be as follows:→
This Invention has for its object improvements in machinery for
cutting coal and other minerals. For this purpose we employ a round
cutter bar having a spiral groove or grooves, or thread or threads in the
form of a screw running from end to end. In the raised parts of the
bar left after the groove or grooves are cut are fixed at regular intervals

page_text: round the periphery a number of suitable cutters projecting above the
surface of the bar and firmly fixed in longitudinal slots or grooves in the
same by wedges, scrows, or other suitable means. These cutters are so
arranged in the bar as to form a continuous line of cutters always
presented to the surface of the coal or other mineral to be cut, the dust
and cuttings from which fall into the spiral groove or grooves, thread or
threads cut in the bar, and by the rotation of this latter are drawn away
from the cutters leaving them clean and not liable to clog.
To further assist the dust being drawn away we fix a semicircular
shield or casing behind the cutter bar and extending its full length; this
shield is carried with the bar, but is so arranged as to remain stationery
while the bar rotates.
The cutter bar may be in one with or connected to a crank shaft
supported in suitable bearings. On the crank shaft are discs acting in
place of a fly wheel. The whole of the bearings carrying the cutter bar
and shaft are fixed on a circular frame on which is mounted one or more
cylinders capable of rotating the aforesaid cutter bar by means of the usual
pistons and connecting rods, the pistons being actuated in the before
mentioned cylinder or cylinders by steam, air, or other motive fluid.
The circular frame carrying the cutting bar, cylinder, ando onnections
is in turn carried within another frame or trolly mounted on tram wheels
arranged for running on rails.
The circular inner frame carrying the cutter bar, cylinder, and
connections is so made as to be capable of being canted to a position other
than horizontal irrespective of the outer frame or trolly, and of being
turned round in a circle after the manner of a turntable by means of a
hand wheel and worm fixed on the main carrying frame or trolly gearing
into a suitable wheel, or into teeth attached to the inner frame carrying
the cutter bar.
The cutter bar is so made that when it is at right angles with the
side of the main carrying frame or trolly it projects from three to four
fect, or any length at which it is desired to cut the coal or other
minerals, and the whole machine is so made as to be either self-propelling
along the rails as the coal or other mineral is cut away, or it can be
arranged to be propelled by hand, rope, or other suitable means.

page_text: 1
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George Warsop and Henry Walker Hill in the:
Great Seal Patent Office on the 4th April 1874.
GEORGE.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we,
WARSOP, of 76, Royal Terrace, and HENRY WALKER_HILL,_of_51,
Hampden Street, both of Nottingham, send greeting.
--
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourth day of October, 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 us, the said George Warsop and Henry Walker Hill,
Her special licence that we, the said George Warsop and Henry Walker
Hill, our executors, administrators, and assigns, or such others as we,
'the said George Warsop and Henry Walker Hill, our 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 CUTTING COAL AND OTHER MINERALS," upon the condition
(amongst others) that we, the said George Warsop and Henry Walker
Hill, our executors or administrators, by an instrument in writing under
our, 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.
1
NOW KNOW YE, that we, the said George Warsop and Henry Walker
Hill, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and ›
ascertained in and by the following statement and the accompanying
Sheet of Drawings
י
This Invention has for its object improvements in machinery for
cutting coal and other minerals. For this purpose we employ a round:
cutter bar having a spiral groove or grooves, or thread or threads in the :
form of a screw running from end to end. In the raised parts of the :

page_text: bar left after the groove or grooves are cut are fixed at regular intervals
round the periphery a number of suitable cutters projecting above the
surface of the bar and firmly fixed in longitudinal slots or grooves in
the same by wedges, screws, or other suitable means. These cutters aro
so arranged in the bar as to form a continuous line of cutters always
presented to the surface of the coal or other mineral to be cut, the dust
and cuttings from which fall into the spiral groove or grooves, or thread
or threads cut in the bar, and by the rotation of this latter are drawn
away from the cutters leaving them clean and not liable to clog.
To further assist the dust being drawn away we fix a semicircular 1
shield or casing behind the cutter bar and extending its full length; this
shield is carried with the bar, but is so arranged as to remain stationery
while the bar rotates.
The cutter bar may be in one with or connected to a crank shaft
supported in suitable bearings. On the crank shaft are discs acting in 1
place of a fly wheel. The whole of the bearings carrying the cutter bar
and shaft are fixed on a circular frame on which is mounted one or
more cylinders capable of rotating the aforesaid cutter bar by means of
the usual pistons and connecting rods, the pistons being actuated in the
before mentioned cylinder or cylinders by steam, air, or other motive 2
fluid.
The circular frame carrying the cutter bar, cylinder, and connections
is in turn carried within another frame or trolly mounted on tram
wheels arranged for running on rails.
The circular inner frame carrying the cutter bar, cylinder, and 2
connections is so made as to be capable of being canted to a position
other than horizontal irrespective of the outer frame or trolly, and of
being turned round in a circle after the manner of a turntable, by means
of a hand wheel and worm fixed on the main carrying frame or trolly
gearing into a suitable wheel or into teeth attached to the inner frame 3
carrying the cutter bar.
The cutter bar is so made that when it is at right angles with the
side of the main carrying frame or trolly it projects from three to four
feet, or any length at which it is desired to cut the coal or other
mineral, and the whole machine is so made as to be either self-propelling 3
along the rails as the coal or other mineral is cut away, or it can be
arranged to be propelled by hand, rope, or other suitable means.

page_text: Fig. 1, of the accompanying Drawings represents an end elevation of
a machine constructed according to our Invention; Fig. 2, represents a
side elevation of the same machine; Fig. 3, represents an elevation to
an enlarged scale of a portion of the cutter bar, and Fig. 4, represents a
cross section of the cutter bar to the same scale as Fig. 3.
A is the cutter bar having the spiral groove a in the form of a screw
running from end to end. At regular intervals round the periphery are
fixed a number of suitable cutters_b, b, b, projecting above the surface
of the bar and firmly fixed therein. When the cutter bar is made to
rotate and is pressed against the coal or other mineral, the cutters b, b, b,
cut away the coal or other mineral, and the dust and cuttings fall into
the spiral groove a, and by the rotation of the bar are drawn away from
the cutters leaving them clean and not liable to clog. The cutter bar A is
in one with or connected to a crank shaft supported in suitable bearings.
On the crank shafts are discs d, d, d, d, acting in place of a fly wheel.
The whole of the bearings carrying the cutter bar and shaft are fixed on
a circular frame f. The cutter bar and shaft are rotated by means of a
steam or air engine either rotary, three cylinder, single cylinder, as
shown in the Drawing or otherwise. In the Drawing e is the cylinder
mounted on the frame f; n is the cross head actuated by the piston rod
and piston, and g, g, are the connecting rods. The circular frame f
carrying the cutter bar A, the cylinder e, and connections is in turn
carried within another frame or trolly H mounted on tram wheels i, i,
arranged for running on rails r, r. The circular inner frame fis capable
of being canted to a position other than horizontal irrespective of the
outer frame H by means of slots in the ear pieces p, p, and is fixed in
position by means of the bolts and nuts 8, 8.
The frame is also capable
of being turned round in a circle after the
means of a hand wheel and worm fixed on the frame or trolly H
gearing into a suitable wheel m attached to the inner frame ƒ carrying
the cutter bar A.
manner of a turntable by
Having thus described the nature of our Invention, and the manner of
performing the same, what we consider to be new and desire to secure
by Letters Patent is as follows:-The employment of a cutter bar fitted
with cutters and having a spiral groove or grooves, thread or threads in
the form of a screw running from end to end, the bar being made to
rotate by means of an engine, whether rotary, three cylinder, single
cylinder or otherwise, and thereby cut the coal or other minerals, the

page_text: engine, cutter bar, and connections being arranged so as to be turned
round after the manner of a turntable, and to be canted to a position
other than horizontal, substantially as described.
In witness whereof, we, the said George Warsop and Henry
Walker Hill, have hereunto set our hands and scals, this First 5
day of April, in the year of our Lord One thousand eight hundred
and seventy-four.