CERTAIN IMPROVEMENTS IN THE METHOD OF SECURING TYRES FOR ROLLING STOCK ON THEIR WHEELS
Year: 1861

page_text: PROVISIONAL SPECIFICATION left by Alfred Krupp at the Office of
the Commissioners of Patents, with his Petition, on the 18th March
1861.
I, ALFRED KRUPP, of Essen; in the Kingdom of Prussia, Cast Steel Manu-
facturer, do hereby declare the nature of the said Invention for " CERTAIN
IMPROVEMENTS IN THE METHOD OF SECURING TYRES FOR ROLLING STOCK ON THEIR
WHEELS," to be as follows:
My Invention has for its object the better securing the tyres of railway:
and other wheels upon the wheel rims, in order to preclude the possibility
of tyres becoming détached therefrom. in case of the fracture of such tyre; -
also to obviate the necessity of using bolt holes or screw taps in or through
the tyres; thereby doing away with one great cause of weakness in the tyres ;
also that by this my method, tyres, particularly, when made of cast steel, may.
be worn down to a much greater extent without risk of danger.
My Invention is adapted to wheels of the present construction or to new
wheels, in the former case it being desirable, where the wheel rim is not of
sufficient breadth, to use a supplementary wheel rim of the proper shape' and
breadth to adapt it to the required section of tyre! For new wheels I form:
the rims thereof with an angle piece projecting upwards' on that side of the
wheel on which the flange of the tyre is coincident. This angler piece is
either rolled or turned out with a groove on the inside. The reverse side.
of the rimsis turned or rolled or otherwise formed with a bevil groove on the
top or under side; as preferred: In adapting this my system to wheels of old.
construction and of the ordinary make, I form a supplementary rim of similar
section to that previously described. This second rim is heated and shrunk
on to the first or normal rim of the wheel, and may be further secured.

page_text: by either bolts passing through both rims or by screws; or this second rim
may have on its under side a groove of the width of the original rim, and of a
-depth sufficient to allow of the second rim being passed over the first rim
when the second rim is expanded by heat, or in other words the depth of
*the groove should be about equal to half the diametrical expansion of the rim.
The purpose of this is to counteract any lateral slipping of the one rim on
the other. The outer edge of the first named angle on the rim of the wheel or
the supplementary rim, as the case may be, is bevilled or curved off for the
purpose afterwards to be explained. In order to adapt the tyre to this.
method of fastening, the section is rolled or otherwise formed of a somewhat
reverse form on its under side to the section of the wheel rim, so that when
the two come together the parts shall correspond. The face of the rim of
the wheel is made slightly on the incline towards the inner edge for the
purpose of facilitating the putting on of the tyre. The tyre is passed over-
the rim of the wheel in the cold or nearly cold state by hydraulic pressure
in preference, though the tyre may be slightly warmed and dropped over the
rim till the projection on the tyre comes in juxtaposition with the groove
in the angle piece of the rim, and the completion of the putting on of the
tyre is then done by hammering or by pressure.
In the Drawings hereunto annexed I have shewn an exemplification of this
my method of securing the tyres on the wheel.
Fig. 1 is a section of a portion of a wheel and tyre. A is the rim of the
wheel; B, the angular piece formed in one with the rim of the wheel; C, the
groove in this angular piece; a is the bevil on the outside of this angular piece;;
D is the bevil groove in the wheel rim. This groove D may be either above:
the rim, as shewn, or below, as afterwards indicated. E is the tyre formed of a
similar section to that shewn, excepting that at 6 the overlap does not exist at
first and before putting on the tyre, but is formed after the tyre is in its place
on the rim, when this overlap is hammered or pressed down by a suitable tool:
until it assumes the condition shewn. The purpose of this overlap is to secure
the tyre from slipping laterally on the rim. At the opposite side of the rim.
the projection c is straight, as indicated by the dotted lines, the metal being.
hammered or pressed after the tyre is in its place till it takes into the bevil.
on the tyre.
In Fig. 2 I have shewn this method of fastening on of tyres as applied to
the ordinary rims of wheels. In this Figure A represents the ordinary rim of:
the wheel, and A¹ the supplementary or second rim, the other parts being the
same and referred to by similar letters of reference. At e, f, and g, the con-
nection between the tyre and rim should be as close as possible, while at h, h,,

page_text: there may be a certain amount of space so as to insure that at the essential
parts the fit shall be as perfect as practicable.
Figs. 3 and 4 shew this same method of fastening tyres on to their wheels,
excepting that I have shewn the the tyre as formed with a bevil i fitting into
a corresponding bevil on the under surface of the wheel rim. The tyre is
prevented from slipping off laterally by overlapping the tyre at b, and by
pressing or hammering the projecting bevil i of the tyre into the corresponding
bevil in the wheel rim. This modification is also applicable to wheels having
a supplementary rim in the case of adapting this method to wheels of the old
construction. This second rim may be secured by bolts or screws, or by an
overlap.
Fig. 5 is simply a modification in the shape of the angles a on the under
side of the tyre and the corresponding wheel rim.
Figs. 6 and 7 are further modifications of the same arrangement, differing
only in the shape of the angle pieces.
The above methods of fastening on the tyre may be further modified, as
shewn in Figs. 8 and 9, in which the rim or supplementary rim, as the case
may be, is formed without the angular piece B, but the under side of the
outside edge (presuming the other to be the inside edge) is also formed with
a bevilled groove. The connection between the tyre and the wheel rim .being
effected by means of a ring K having two angle pieces h, h, the angle h fitting
into the groove in the tyre, and h¹, the under side of the wheel rim. When
the ring is in its place the angle h¹ is hammered or pressed into the groove
on the under side of the wheel rim.
+
Fig. 9 shews this same method as applied to wheels of the ordinary con-
struction. The overlap at j is also formed, though this latter is not absolutely
essential, and may, if thought desirable, be dispensed with.
Fig. 10 is another modification, differing, however, only from that just
described in the shape of the ring K, so as to adapt this method of fastening
to existing wheels of the ordinary construction, and thus obviating the necessity
of using a supplementary rim.
Figs. 11 and 12 represent a method of fastening the tyre on the wheel
similar to that shewn in Figs. 6 and 7, excepting that the tyre is shewn as
put on solid disc wheels, having a supplementary wheel rim united to the
wheel in the manner represented, or by any analagous ways.