An Improved Cutter Wheel for Coal Cutting Machines, and Cutter Wheel Bracket.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
An Improved Cutter Wheel for Coal Cutting Machines, and Cutter
Wheel Bracket.
We, WILLIAM EDWARD GARFORTH, Colliery Owner, Halesfield, Normanton,
RICHARD SUTCLIFFE, Mining and Mechanical Engineer, of Public Hall Chambers,
Barnsley, and WILLIAM BUXTON, Colliery Official, Altofts, Normanton, do hereby
declare the nature of this invention to be as follows:-
:-
This invention relates to that type of coal cutting machines, in which the coal
is undercut by a large horizontal wheel, provided with cutters on its periphery;
and refers:
In the first place to an improved construction of cutter wheel, having for its
object to enable the wheel to be readily transported from one part of a mine to
the other by hand, and through comparitively narrow passages and past sharp
corners. This construction consists in forming the wheel in three separate parts;
of which one part is formed solid with, or permanently attached to, the centre
plate or boss of the wheel; the other two portions, which are diametrically
opposite each other, and each covering in angular measurement about 120 degrees
of the surface of the wheel, are bolted to the above mentioned central plate.
The central plate is correspondingly recessed or formed thinner on two diametri-
cally opposite sides, over in angular measurement, about 120 degrees; and
provided with chipping or bearing strips on the flat and edge parts of the recesses.
The bracket plate and central portion are transported together, the bracket plate
covering one of the sector shaped halves of the central portion.
In the second place this invention refers to an improved construction of the
cutter bracket, having for its object, to avoid the disadvantage which occurs
with coal cutting machines, when working on the fall side of a horizontal work-
ing face in highly inclined seams, in that owing to the weight of the machine
tending to draw the machine away from the coal face, the machine and wheel
gradually work back, and thereby diminish the depth of the undercut. To avoid
this we propose to lay the rails carrying the machine so that both rails are at
the same level, or we may even lay the outer rail, slightly higher. Correspond-
ing to the position thereby obtained for the machine and the inclination of the
coal seam, we form the cutter wheel bracket with an upward bend, so that it
and the wheel lie approximately parallel with the plane or inclination of the
seam.
T
1
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page_text: An Improved Cutter Wheel for Coal Cutting Machines, and Cutter
Wheel Bracket.
We, WILLIAM EDWARD GARFORTH, Colliery Proprietor, Halesfield, Normanton,
RICHARD SUTCLIFFE, Mining and Mechanical Engineer, of Public Hall Chambers,
Barnsley, and WILLIAM BUXTON, Colliery Official, Altofts, Normanton, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
This invention relates to that type of coal cutting machines, in which the coal
is undercut by a large horizontal wheel, provided with cutters on its!-periphery;
and refers:-
In the first place to an improved construction of cutter wheel, having for its
..object, to enable the wheel to be readily transported from one part of a mine to
another by hand, and through comparitively narrow passages and past sharp
corners. This construction consists in forming the wheel in three separate parts;
of which one part is formed solid with or permanently attached to, the, centre
plate or boss of the wheel; the other two portions, which are diametrically
opposite each other and each covering in angular measurement about 120 degrees
of the surface or circumference of the wheel, are bolted to the above mentioned
central plate. The central plate is correspondingly recessed or formed thinner
on two diametrically opposite sides over, in angular measurement, about 120
degrees; and provided with chipping or bearings strips on the flat and edge
parts of the recesses. The bracket plate and central portion are transported
together, the bracket plate covering one of the sector shaped halves of the central
portion.
In the second place this invention refers to an improved construction of the
cutter wheel bracket, having for its object to avoid the disadvantage, which
occurs with coal cutting machines when working along a horizontal road in
highly inclined seams, and having the working coal face to the rise side of the
machine; in that, owing to the weight of the machine' tending to draw the
machine away from the coal face, the machine and wheel gradually work back,
and thereby diminish the depth of the undercut. To avoid this, we lay the
rails carrying the machine so that both rails are at the same level, or we may
even lay the outer rail slightly higher, so that the machine is carried approxi-
mately in a horizontal position. Corresponding to this position of the machine
and the inclination of the coal seam, we form the cutter wheel bracket, or the
triangular or buttterfly portion thereof, (carrying the bearing for the centre or
journal of the cutter wheel), with an upward bend, such that it and the plane of
the cutter wheel lie parallel to the inclination of the coal seam in which the cutter
wheel is to be employed. We prefer to construct the bracket in other respects
as described in the Specification of Letters Patent granted to us No. 3760 dated
12 February 1897.
And in order that our invention and the manner in which the same is to be
performed may be more readily and clearly understood, we have annexed' hereto
the accompanying sheets of drawings; in which Fig. 1 is a plan view looking
on the top of part of a cutter wheel constructed in accordance with our inven-
tion, one of the separable portions being omitted, to shew one of the recessed
portions of the central plate. Fig. 2. is a vertical section on line AFGCB of
Fig. 1, and Fig. 3. is a vertical section. on line DCE of Fig. 1: whilst Fio 4
:.

page_text: is a plan looking on the top, and Fig. 5 a vertical section: on line FH of Fig. 4,
of a cutter wheel bracket constructed in accordance with our invention.
a Figs. 1 to 3 indicates that portion of the cutter wheel, which is formed or cast
in one piece with the centre plate or boss b of the wheel; whilst the portions c
and d of the wheel are formed as separate pieces, having central boss segments e
formed on or cast therewith respectively. For the sake of exposing one of the
recessed parts b', immediately to be referred to, the portion d is not shewn in the
drawings. The centre plate 6 is recessed at the parts b¹ corresponding to the boss
segments e; these latter being secured to the recessed parts by bolts f, passing
through bolt holes g. The separate portions c and d are connected to the portion a
by means of the bolts and the rim plates i. are chipping or fitting strips.
The portions c and d cover respectively about 120 degrees of the circumference
of the wheel over the toothed portion, whilst the boss segments e may be formed
annular to correspond, as shewn in the drawing; or the inner (junction) line may
be formed as a cord or otherwise as indicated for example by either of the dotted
lines m or n.
The cutter wheel bracket, see Figs. 4 and 5, comprises the approximately tri-
angular portion o, having the bearing p for the centre or journal of the cutter
wheel a formed in it towards the apex; the vertical rectangular portion 9 abutting
against and secured to the side frame of the machine; and the curved portion s
connecting and formed in one portion with both the portions o and q. t is an
opening in the curved portion to admit the pinion u, (shewn in dotted lines),
engaging the teeth h of and driving the cutter wheel a, and w is a continuation
of this opening to admit the shaft on which the pinion u is mounted. According
to my present invention, the triangular portion o is formed at such an angle with
respect to the portion q, (or other portion of the bracket by which it is attached
directly or indirectly to the frame of the machine), that the plane of the portion o
and consequently of the cutter wheel is approximately parallel to the plane of
the coal seam.
For example, the bracket as shewn in the drawing is suitable in
the case of a coal seam having a dip or inclination of about 25 degrees.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
1. The construction of the cutter wheels of coal cutting machines in three separate
portions of which the one is formed or cast in one piece with the centre plate or
boss, the other two being situated on diametrically opposite sides of the first
respectively and detachably connected thereto substantially as set forth.
2. The construction of the cutter wheels of coal cutting machines in three
separate portions a, c and d of which the one a is cast or formed in one piece with
the centre plate or boss 6 and the other two c and d being situated on opposite
sides of the first respectively each having a sector- or segmental boss plate e fitting
in and secured to a corresponding recessed portion of the centre plate or boss
substantially as set forth and illustrated.
3. In coal cutting machines the construction of cutter wheel bracket consisting
of an approximately triangular plate o having about its apex the bearing for the
centre or boss of the cutter wheel with a plate q attached to the machine or pinion
bracket both o and q being formed in one piece and with the triangular plate or
portion o inclined at such an angle to the plate or portion g that when used in
inclined seams with the machine laid horizontally the inclination of the part o
of the bracket is the same as that of the coal seam substantially as and for the
purpose herein set forth.
4. In the cutter wheel bracket of coal cutting machines to be employed in
inclined seams the combination of a vertical portion 9 an approximately tri-
angular portion o having about its apex the bearing for the centre or boss of the
cutter wheel and a curved portions having about its centre an opening t all three
portions q, o and s being formed or cast in one piece and with the portion o

page_text: inclined to the portion q at an angle less than 90 degrees by the angle of the
inclination or dip of the coal seam in which the coal cutting machine is to be
employed substantially as and for the purpose herein set forth and illustrated.
Dated this 9th day of August 1898.
J. CLARK JEFFERSON,
30, Park Row, Leeds, Agent for aforesaid Applicants.