Year: 1898

page_text: Date of Application, 9th May, 1898
Complete Specification Left, 8th Feb., 1899-Accepted, 18th Mar., 1899
ww
I, GEORGE WILLIAM WINN, of Nostell Colliery, Wakefield, in the County of York,
do hereby declare the nature of this invention to be as follows:-
This invention relates to coal cutting machines of the kind in which a rotating
wheel provided at its periphery with cutters is employed, the object being to effect
an improved construction by which the cutters may be readily removed or replaced.
According to this invention a tool box or carrier is provided into which one or more
cutters can be inserted and secured therein by a wedge or similar device. The box or
carrier is itself attached to the rim of the wheel. Hitherto it has been necessary
when it is desired to renew the cutters to remove the tool box or carrier from the
rim of the wheel, but by the construction according to the present invention the
cutters may be removed and replaced by others by the removal or slackening of one
or more wedges, screws, or similar devices, which secure the cutter or cutters in the
tool carrier without removing the latter itself from the wheel.
If desired one wedge or the like may be employed to secure several cutters in one
box, or a separate securing device may be employed to each cutter. The cutters may
abut upon the periphery of the wheel in which case it is preferred to provide the rim
with inclined surfaces recesses or the like for the reception of the ends of the tools
or if preferred the box or carrier may itself he provided with such surfaces or
recesses, the rim of the wheel being either plain or preferably so shaped as to corre-
spond with the shape of the tool carrier and so afford the latter a secure seating.
The tool carrier may be permanently or detachably secured to the rim of the wheel.
Two constructions of cutting device according to this invention will now be
described by way of example.
According to one construction intended for three rows of cutters the rim of the
wheel is provided at the desired intervals with notches having inclined bottom
surfaces prepared to receive the ends of the cutters, the notches intended to receive
the cutters in the central row having bottom surfaces parallel to the axis of rotation
of the wheel, those intended for the two outer rows of cutters being preferably
inclined to one another so that the cutters when their ends are properly bedded in
the notches will diverge out wardly from one another toward their cutting ends. One
central notch or surface, and two side ones will form a group, the groups being
disposed around the periphery of the wheel at any desired intervals.
Tool holders are provided having lugs to embrace the rim of the wheel to which
they are secured by bolts or rivets passing through the lugs and the rim. One such
holder will be appropriated to each group of notches. The holder is provided with
three grooves, which receive the tools when the latter are placed in position upon the
notches or surfaces intended for their reception on the rim of the wheel,
and conjointly with the rim support them against the stresses to which they
are subjected when cutting the coal. Thus when the holder is placed in position
on the rim of the wheel three sockets are provided for the cutters, the bottoms of the

page_text: sockets being formed by the notches or recesses in the rim of the wheel, three side
walls of each of the sockets being formed by the grooves in the tool holder, the
fourth being left open. The fourth wall is constituted by one face of a block of
metal, which is made to enter between and bear upon the two side cutters and will
be wedge-shaped, because these cutters converge upon each other; the two inclined
surfaces of the wedge form the fourth walls of the two side sockets, and further, the
front face of the wedge also forms the fourth wall of the central socket. The tools
are preferably provided with slight projections at their lower ends which engage with
recesses undercut in one or more walls of the sockets; the two side tools may be
made to bear upon the projection of the central tool and help to retain it in its place.
The wedge-shaped block is secured in position by a bolt, set screw, or equivalent
device. When everything is in position the removal of the wedge-shaped block will
leave the sockets in which the three tools are placed so exposed that the three tools
may one by one be removed each through the open side of its socket. In order to
adapt a tool box constructed according to this invention to existing wheels, the
recesses or surfaces mentioned in the construction just described as being formed
in the rim of the wheel may be formed in the bottom of the tool holder itself, which
may then be attached in any desired manner to the rim of the wheel. It is
preferred however, in order to afford a secure hold for the tool holder without throwing
undue strain on the bolts, rivets, or the like which secure it to the wheel to provide
the latter with curved or other recesses at the desired intervals in its rim into which
recesses corresponding projections on the tool holder fit.
If desired the rim of the wheel may be thickened at the places where the cutters
are to be placed in order to afford the latter a broader base, or projections may be
formed upon the rim between which or against which the securing lugs of the tool
holder are placed so as to afford an additional precaution against circumferential
strain and to avoid throwing undue strain on the securing bolts or rivets.
Dated this 9th day of May 1898
BOULT & WADE,
Agents for the Applicant.
Improvements in of relating ang HIDES
I, GEORGE WILLIAM WINN, of Nostell Colliery, Wakefield, in the County of York,
do hereby declare the nature of this invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement: —
This invention relates to coal cutting machines of the kind in which a rotating
wheel provided at its periphery with cutters is employed, the object being to effect
an improved construction by which the cutters may be readily removed or replaced.
According to this invention a tool holder or carrier is provided into which one or more
cutters can be inserted and secured therein by a wedge or similar device. The holder
or carrier is itself attached to the rim of the wheel. Hitherto it has been necessary
when it is desired to renew the cutters to remove the tool holder or carrier from the
rim of the wheel, but by the construction according to the present invention the
cutters may be removed and replaced by others by the removal or slackening of one
or more wedges, screws, or similar devices, which secure the cutter or cutters in the
tool holder without removing the latter itself from the wheel.
If desired one wedge or the like may be employed to secure several cutters in one
box, or a separate securing device may be employed to each cutter. The cutters may
abut upon the periphery of the wheel in which case it is preferred to provide the rim

page_text: with inclined surfaces recesses or the like for the reception of the ends of the tools or
if preferred the holder or carrier may itself be provided with such surfaces or recesses
the rim of the wheel being either plain or preferably so shaped as to correspond with
the shape of the tool carrier and so afford the latter a secure seating. The too
carrier may be permanently or detachably secured to the rim of the wheel.
In the accompanying drawings,
Figure 1 is an elevation of part of the rim of a cutter wheel with a tool box attached
the cutters being removed.
Figure 2 is a plan of Figure 1.
Figure 3 is a longitudinal section on the line 3-3 of Figure 2, with the cutters in
position.
Figure 4 is a cross section on the line 4-4 of Figure 2.
Figure 5 is a similar view with the cutters in position.
Figure 6 is a perspective view of the wedge hereinafter referred to.
Figure 7 is a longitudinal section of a modification.
According to one construction intended for three rows of cutters, the rim A of the
wheel is provided at the desired intervals with groups of notches, each group con-
sisting of two side notches A¹ and a central one A2. Each notch has an inclined
bottom surface prepared to receive the end of a cutter so that the cutters when
bedded in the notches, will not be normal to the wheel, but will have a rake in the
direction of rotation of the wheel (Figure 3) the side notches A¹ intended for the two
outer rows of cutters are preferably inclined to one another, so that the side cutters
will diverge outwardly from one another towards their cutting ends when their bases
are properly bedded in their respective notches, while the central notches A² have
bottom surfaces parallel to the axis of rotation of the wheel (Figure 5).
Tool holders B are provided having lugs to embrace the rin A to which they are
secured by bolts or rivets passing through the lugs and the rim. One such holder
will be appropriated to each group of notches. Each holder is provided with two side
grooves B¹ and a central one B2, the grooves receiving the tools when the latter are
placed in position upon the notches or surfaces A¹ A2 intended for their reception on
the rim A, and conjointly with the rim support them against the stresses to which
they are subjected when cutting the coal. Thus when the holder is placed in
position on the rim A, three sockets are provided for the cutter, the bottoms of the
sockets being formed by the notches or surfaces A¹ A2, three side walls of each of the
sockets being formed by the grooves B¹ B2, the fourth being left open.
The fourth wall of each socket is constituted by one face of a block of metal C,
which is made to enter between and bear upon the two side cutters D, and will
be wedge-shaped, because these cutters converge upon each other; thus the
two inclined surfaces of the wedge C form the fourth wall of the two side sockets,
and further the front face of the wedge C also forms the fourth wall of the
central socket. The tools D are preferably provided with slight projec-
tions or tongues Di
at their lower ends which engage with grooves or
recesses D2, undercut in one or more walls of the sockets: the two side tools are pre-
ferably made to bear upon the projection of the central tool and help to retain it in
its place (Fig. 3) and for this purpose may be grooved similarly to the tool-holder
(Fig. 7). The wedge C is secured in position by a bolt set screw or equivalent device:
this may be effected by forming the wedge with a tail piece C¹ a bolt or stud passing
through the hole B3 in the tool-holder and also through the tail piece C¹. When
everything is in position the removal of the wedge C will leave the grooves B¹ B² so
exposed that the three tools may one by one be removed each through the open side of
the groove.
In order to adapt a tool box constructed according to this invention to existing
wheels the recesses or surfaces A¹ A² described as being formed in the rim of the wheel
are formed in the bottom of the holder itself, which may then be attached in any
desired manner to the rim A (Fig. 7). It is preferred, however, in order to afford a
secure hold for the tool holder B without throwing undue strain on the bolts rivets or
the like, which secure it to the rim to provide the latter with curved or other

page_text: recesses A³ at the desired intervals into which recesses corresponding projections B+
on the tool holder fit. In this construction, grooves are preferably formed in the side-
cutters which engage with the projection D' on the central one, instead of the latter
bearing against the bottoms of the side cutters.
If desired the rim of the wheel may be thickened at the places where the cutters are
to be placed in order to afford the latter a broader base, or projections A+ may be
formed upon the rim between which or against which the securing lugs of the tool
holder are placed so as to afford an additional precaution against circumferential
strain, and to avoid throwing undue strain on the securing bolts or rivets.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same, is to be performed, I wish it to be under-
stood that I am aware of the Specification of Garforth, Sutcliffe and Buxton
No. 19381 of 1896 and that I do not claim anything described or claimed therein,
but I declare that what I claim is :-
1. In a coal cutting machine fixing two or more cutters by means of one wedge
in a tool holder permanently or detachably secured to the cutting wheel substantially
as described.
2. In a coal cutting machine the combination with a tool holder of a wedge sub-
stantially as and for the purpose described.
3. In a coal cutting machine the combination of a tool holder a wedge and
tongued or tongued and grooved cutters substantially as described.
4. In a coal cutting machine the combination with a tool holder and wedge of
inclined surfaces such as A¹ A² on the periphery of the cutting wheel with
or without tongues and grooves on the cutters and tool holder substantially as
described.
5. The tool-holder and wedge substantially as described and illustrated in Figure 7
of the accompanying drawings.
6. In a coal cutting machine securing one cutter by means of another substantially
as described.
Dated this 7th day of February 1899.