AN IMPROVED SAFETY WHEEL FOR RAILWAY CARRIAGES, VANS, OR OTHER VEHICLES, ALSO FOR LOCOMOTIVES
Year: 1876

page_text: LETTERS PATENT to Charles Kesseler, Civil Engineer, of Greifswald, Prussia,
for the Invention of "AN IMPROVED SAFETY WHEEL FOR RAILWAY
CARRIAGES, VANS, OR OTHER VEHICLES, ALSO FOR LOCOMOTIVES."
Sealed the 15th May 1877, and dated the 16th November 1876.
PROVISIONAL SPECIFICATION left by the said Charles Kesseler at the
Office of the Commissioners of Patents on the 16th November 1876.
CHARLES KESSELER, Civil Engineer, of Griefswald, Prussia. "AN IMPROVED
SAFETY WHEEL FOR RAILWAY CARRIAGES, VANS, OR OTHER VEHICLES, ALSO FOR
LOCOMOTIVES."
My Invention has reference to a new mode of fixing the tire to the body of rail-
way carriage wheels with a view to safety, and consists with reference to wheels of
ordinary construction in forming on the periphery of the wheel body a ring of dove-
tail section and a groove of corresponding section in the internal circumference of
the tire, then portions of the said ring and of the corresponding tire face are taken
off at equal intervals, thereby leaving alternate projections and spaces forining
tenons and groovas on the body and in the tire. The grooves between the tenons
in each part respectively will allow the tenons to pass through in order to allow the
tire to be put on to the body. The tire in a heated state being applied to the body
is moved thereon so far as to cause the tenons of the tire to coincide with the dove-
tails of the body, after which the tire is allowed to shrink on the body. The said
grooves will then appear as gaps which are filled up with accurately fitting locking
keys, which are rivetted outside in order to prevent them from dropping out. And
my Invention with reference to wheels constructed specially for the purpose consists
in forming the dovetailed tenons on the inside of the tire and the corresponding
grooves in the outer periphery of the body. In other respects the mode of pre-
paring and uniting the parts is the same as above stated.
By the above described mode of constructing wheels the tension on the tire due
to shrinkage will be lessened and the locking keys will have only to resist.com-
pression. Also by the dovetails retaining the tire in a radial direction and
not yielding sideways the tire will be kept in its place even in case of fracture;
it will also be prevented by the locking keys from moving in a circumferential
direction.

page_text: The ordinary liability to danger from imperfections in the tire will be obviated by
the above described mode of constructing railway wheels.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Charles Kesseler in the Great Seal Patent Office on the 16th
May 1877.
CHARLES KESSELER, Civil Engineer, of Greifswald, Prussia. "AN IMPROVED
SAFETY WHEEL FOR RAILWAY CARRIAGES, VANS, OR OTHER VEHICLES, ALSO FOR
LOCOMOTIVES."
My Invention of "An Improved Safety Wheel for Railway Carriages, Vans, or
other Vehicles, also for Locomotives" has reference to a new mode of fixing the tyre
to the body of railway carriage wheels with a view to safety, and consists with special
reference to wheels of ordinary construction in forming on the periphery of the wheel
body a ring of dovetail section and a groove of corresponding section in the internal
circumference of the tyre, then portions of the said ring and of the corresponding
tyre face are taken off at equal intervals, thereby leaving alternate projections and
spaces forming tenons and grooves on the body and in the tyre. The grooves
between the tenons in each part respectively will allow the tenons to pass through
in order to allow the tyre to be put on to the body. The tyre in a heated state
being applied to the body is moved thereon so far as to cause the tenons of the
tyre to coincide with the dovetails of the body, after which the tyre is allowed
to shrink on the body. The spaces between the said tenons will then appear as
gaps which are filled up with accurately fitting locking keys which are rivetted
outside in order to prevent them from dropping out. And any Invention consists
also in forming the dovetail tenons on the inside of the tyre and the corresponding
grooves in the outer periphery of the body. In other respects the mode of preparing
and uniting the parts is the same as above stated.
By the above described mode or modes of constructing wheels the tension on the
tyre due to shrinkage will be lessened and the locking keys will have only to resist
compression. Also by the dovetails retaining the tyre in a radial direction and
not yielding sideways the tyre will be kept in its place even in case of fracture;
it will also be prevented by the locking keys from moving in a circumferential
direction.
The ordinary liability to danger from imperfections in the tyre will be obviated
by the above described mode of constructing railway wheels.
Having thus stated the nature of the said Invention, I will proceed to describe
more particularly in what manner the same is to be performed by the aid of the
accompanying Drawings, in which are represented arrangements applicable to wheels
of ordinary and special construction respectively.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a section showing a rim of a wheel body with a ring on it of dovetail
section and a tyre with a groove in it of corresponding section; Fig. 2 is a similar
section shewing a tyre with a ring on it of dovetail section and a wheel body with
a groove of corresponding section on its rim.
Figures 3 and 4 are vertical sections of entire wheels.
Fig. 5 represents the tyre of a wheel; Fig. 6, the body of the same; and Fig. 7,
the tyre and body put together to form a wheel.
Fig. 8 is an edge view of a tenon detached; and Fig. 9 a face view of the same.
In these several Figures the same letters of reference indicate corresponding
parts.
The arrangement shewn in Fig. 1 relates especially to wheels of ordinary con
struction, and that in Fig. 2 to wheels specially constructed to suit the Invention;

page_text: A is the wheel body which in Fig. 1 has on it a ring B of dovetail section forming
a tenon to fit into the grooves of corresponding section in the internal circumference
of the tyre C. In Fig. 2 the ring B is on the internal circumference of the tyre, and
the groove is in the outer circumference of the wheel body; D is a locking key
inserted in the gap between each pair of tenons, such keys being rivetted outside to
secure them in place as required.
In Fig. 5 is shewn a wheel tyre with portions taken off the internal circumference
at equal intervals; and in Fig. 6 is shewn a wheel body with corresponding portions
taken off the ring on the rim of the same, thereby exhibiting in each of such
respective parts of the wheel a range of alternate projections and spaces correspond-
ing in such a manner as to admit of the two parts (wheel body and tyre) being
united by the projections on the one part passing into the spaces in the other.
After the two parts of the wheel have been so put together they are turned one on
the other so as to make the tenons on one part coincide with the dovetails on the
other, and thereby leave gaps as represented in Fig. 7 ready to be filled up by lock-
ing keys D rivetted on the outside. By this means wheels may be constructed
having the advantages herein-before stated.
•
Having thus described the nature of the said Invention and in what manner the
same is to be performed, I hereby declare that what I claim as of my Invention is
the construction of the tyre and body of railway wheels and fixing them together in
the manner described, whereby the liability to danger in wheels of the ordinary con-
struction, is prevented, as herein-before described.
In witness whereof, I, the said Charles Kesseler, have hereunto set my
hand and seal, the Eleventh day of May, in the year of our Lord One
thousand eight hundred and seventy-seven.
CHARLES KESSELER. (L.S.)