Improved Method of Connecting Tyres to the Wheel-bodies of Railway Wheels.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improved Method of Connecting Tyres to the Wheel-bodies of
Railway Wheels.
I, JOSEF HÖNIGSVALD, of 8, Augustinerstrasse, Vienna, I, Austria, Imperial
Councillor, do hereby declare the nature of this invention to be as follows:-
This invention relates to a method for enabling a permanent, strong, and
secure connection to be effected between the tyre and wheel-body of the wheels
of railway vehicles. This end is attained according to this invention by heating
the suitably formed tyre, placing the wheel-body in a cold state into the said
tyre, and then setting up the tyre in a matrix that is shaped to correspond with
the shape of the tyre, so that, on cooling, the contracted tyre will encircle or
embrace the wheel-body with great force, and can be readily moved together
with the said wheel-body from the matrix. For the purpose of increasing the
strength of the connection, the projecting inner edges of the tyre that take over
the wheel-body may be pressed upon the wheel body in a heated state, or can
be fixed by hammering in a cold state to the said wheel-body which is provided
with annular grooves to receive the said projecting inner edges.
I shall now proceed to describe the mode of carrying out this invention with
reference to the accompanying drawings, in which Fig. 1 is a section showing
a part of the matrix, and the relative positions of the tyre and wheel body in
several stages of the process; Fig 2 is a cross section through the parts of the
wheel connected together according to this invention in the case in which it is
desired to effect a further strengthening of the connection by pressing or hammer-
ing the projecting inner edges of the tyre upon the rim of the wheel body.
Fig. 3 is a plan on a smaller scale of the matrix employed in carrying out this
process, the wheel being indicated therein by dotted lines.
A tyre A is produced in the usual manner, of a larger diameter than the tyre
when mounted on the finished wheel, and is provided with inwardly-projecting
edges a and b, of which the edge a situated on the flanged side of the wheel, has
its internal diameter about 8 millimetres
greater
smaller
than the other edge . The
tyre is placed with the flange side upwards in a heating furnace which allows
of uniformly heating the tyre. As soon as the latter has reached a bright red heat.
it is taken out of the furnace, and the wheel-body B is placed cold into the same.
In Fig. 1 is shown, in finely dotted lines, the position of the tyre when cold,
and in thick dotted lines its position when hot.
The two parts A and B of the wheel are placed in a press or under a hammer,
and are forced or set up in a matrix C by the pressure of the press plunger or
of the hammer head. The matrix is turned smooth to correspond to the periphery
of the finished tyre, but larger in internal diameter to the extent of about one
per cent. to allow for shrinkage. The matrix is placed on the under-piece or on
the anvil of the hammer, in a framing d, and is encircled by a clamping ring d¹.

page_text: The press or the hammer acts by means of a press ring f which is mounted
on a supporting plate f¹ placed upon the flanged side of the red-hot tyre, and
presses the latter uniformly into the matrix C. By these means the tyre is set
up about one per cent. of the diameter, and it is brought into the form repre-
sented in Fig. 1 by thick broken lines.
The tyre is now allowed to cool until it has contracted to such an extent as
to be capable of being readily removed from the matrix. As shown, the wheel
body B, on the removal of the tyre, is already secured in its position in the
latter, and can now be placed together with the latter upon a frame which will
allow of uniform contraction of the tyre during the complete cooling of the same.
When the tyre has become cold, it has the shape indicated by fine broken lines
in Fig. 1, and is then firmly fixed on the wheel body.
If it is desired to still further increase the strength of the connection, the
wheel is again slightly warmed, and placed in a matrix D, and then the pro-
jecting edges a and b of the tyre are pressed together as shown in Fig. 2 by
means of suitably formed discs h and serving respectively as under-piece and
top piece, so that the edges enter annular grooves formed in the rim of the wheel
body B and grip the latter firmly.
The connection of the tyre with the wheel body in this manner may also be
effected in the cold state, in which case the projecting edges a and b of the tyre
are forced by gentle hammering into the corresponding annular grooves in the
flanges of the wheel body.
By knocking with hammers an examination may be made as to whether the
tyre and wheel body are firmly fixed together, and those wheels in which this
is not the case are again heated, but in such a manner that the wheel body is
heated as slightly as possible, whilst the tyre is well beated. This procedure
may be applied to every wheel for the sake of safety.
The wheels thus finished are then bored out at the hub (n, Fig. 3). The tread,
which is usually perfectly circular and smooth, is not turned, but the skin of
oxide which is so extremely resistant to wear is allowed to remain. Only when
the tyre has had to be strongly heated after the pressing-in operation, or the
tyre has become warped or distorted in consequence of an error during the opera-
tion, or in cooling is it necessary that the tyre should be suitably turned or
ground to its final shape.
Dated this 31st day of March 1898
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.
Improved Method of Connecting Tyres to the Wheel-bodies of
Railway Wheels.
I, JOSEF HÖNIGSVALD, of 8, Augustinerstrasse, Vienna, I, Austria, Imperial
Councillor, 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 a method for enabling a permanent, strong, and
secure connection to be effected between the tyres and wheel-bodies of the wheels
of railway vehicles. This end is attained according to this invention by heating
the suitably formed tyre, putting the wheel-body in a cold state into the said

page_text: 5
shaped to corresponu wen
he shape of the tyre, so that, on cooling, the contracted tyre will encircle or
mbrace the wheel-body with great force, and can be readily moved together
with the said wheel body from the matrix. For the purpose of increasing the
trength of the connection, the projecting inner edges of the tyre that take over
he wheel body may be pressed upon the wheel body in a heated state, or can
be fixed by hammering in a cold state to the said wheel-body which is provided
with annular grooves to receive the said projecting inner edges.
re, and then setting up the tyre in a matrix that
a
I shall now proceed to describe the mode of carrying out this invention with
reference to the drawings filed with my Provisional Specification in which Fig. I
is a section showing a part of the matrix, and the relative positions of the tyre
and wheel body in several stages of the process; Fig. 2 is a cross section through
the parts of the wheel connected together according to this invention in the
case in which it is desired to effect a further strengthening of the connection by
pressing or hammering the projecting inner edges of the tyre upon the rim
plan on a smaller scale of the matrix employed
of the wheel body. Fig. 3 is
in carrying out this process, the wheel being indicated therein by dotted lines.
A tyre A is produced in the usual manner, of a larger diameter than it has
when it is mounted on the finished wheel, and is provided with inwardly-projecting
edges a and b, of which the edge a situated on the flanged side of the wheel, has
its internal diameter about 8 millimetres greater than the other edge b. The
tyre is placed with the flange side upwards in a heating furnace which allows
of uniformly heating the tyre. As soon as the latter has reached a bright red heat.
it is taken out of the furnace, and the wheel-body B is placed cold into the same.
In Fig. 1 is shown, in finely dotted lines, the position of the tyre when cold,
and in thick dotted lines its position when hot.
The two parts A and B of the wheel are placed in a press or under a hammer,
and are forced or set up in a matrix C by the pressure of the press plunger or
of the hammer head. The matrix is turned smooth to correspond to the periphery
of the finished tyre, but larger in internal diameter to the extent of about one
per cent. to allow for shrinkage. "The matrix is placed on the under-piece or on
the anvil of the hammer, in a framing d, and is encircled by a clamping ring d.
The press or the hammer acts by means of a press ring f which is mounted
on a supporting plate fi placed upon the flanged side of the red-hot tyre, and
presses the latter uniformly into the matrix C. By these means the tyre is set
up about one per cent. of the diameter, and it is brought into the form repre-
sented in Fig. 1 by thick broken lines.
The tyre is now allowed to cool until it has contracted to such an extent as
to be capable of being readily removed from the matrix. As shown, the wheel
body B, on the removal of the tyre, is already secured in its position in the
latter, and can now be placed together with the latter upon a frame which will
allow of uniform contraction of the tyre during the complete cooling of the same.
When the tyre has become cold, it has the shape indicated by fine broken lines
in Fig. 1, and is then firmly fixed on the wheel body.
If it is desired to still further increase the strength of the connection, the
wheel is again slightly warmed, and placed in a matrix D, and then the pro-
jecting edges a and b of the tyre are pressed together as shown in Fig. 2 by
means of suitably formed discs h and k serving respectively as under-piece and
top piece, so that the edges enter annular grooves formed in the rim of the wheel
50 body B and grip the latter firmly.
55
The connection of the tyre with the wheel body in this manner may also be
effected in the cold state, in which case the projecting edges a and b of the tyre
are forced by gentle hammering into the corresponding annular grooves in the
flanges of the wheel body.
By knocking with hammers an examination may be made as to whether the
tyre and wheel body are firmly fixed together, and those wheels in which this
is not the case are again heated, but in such a manner that the wheel body is

page_text: heated as slightly as possible, whilst the tyre is well heated. This procedure
may be applied to every wheel for the sake of safety.
The wheels thus finished are then bored out at the hub (n, Fig. 3). The tread,
which is usually perfectly circular and smooth, is not turned, but the skin of
oxide which is so extremely resistant to wear is allowed to remain. Only when
the tyre has had to be strongly heated after the pressing-in operation, or the
tyre has become warped or distorted in consequence of an error during the opera-
tion, or in cooling, it is necessary that the tyre should be suitably turned or
ground to its final shape.
Having now particularly described and ascertained the nature of the said 1
invention and in what manner the same is to be performed I declare that what
I claim is:-
:-
The herein described process or method of connecting the tyre with the wheel
body of a railway wheel, consisting in first heating the tyre (A) then placing
the wheel body (B) cold, into the tyre, and then setting up the tyre, together
with the inserted wheel body, in a matrix (C) which is formed to correspond to
the cross sectional contour of the tyre, so that the tyre, after cooling, firmly
encircles the wheel body.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C.,
Chartered Patent Agent.