Improvements in Wheel Rims.
Year: 1899

page_text: PROVISIONAL DI MUITICATION.
Improvements in Wheel Rims.
I, FREDERICK RICHARD SIMMS, of Amberley House, 12, Norfolk Street, Strand,
in the County of London, Engineer, do hereby declare the nature of this inven-
tion to be as follows:-
This invention relates to improvements in wheel rims more especially of the
kind adapted to receive pneumatic tyres of the type described in my former
Patent No. 29945 of 1897, the object of the invention being to cheapen the manu-
facture of such rims and to enable them to be easily and inexpensively repaired
should they be injured, for example by being crushed against a stone or curb.
In carrying out the invention I form such rims in three parts, that is to say,
I provide a central recessed portion having lateral flanges, which are preferably
flat, and two side pieces, preferably of a U-shape in cross section, which are
adapted to be riveted, bolted or otherwise secured to the lateral flat flanges of
the central portion and to form lateral recesses for receiving the flanges upon
the tyre.
With this construction of wheel rim it will be obvious that the manufacture
is considerably cheapened and it will also be clear that should the rim come in
contact with a stone for example, when the wheel is being used, so as to be
thereby damaged, the damaged ring can be easily removed from the central
portion of the rim and be replaced by a new one without the necessity of re-
moving the spokes; the U-shaped portion aforementioned also forms a con-
siderable protection against damage to the tyre itself from external causes such
as curbstones and the like.
The increased surface of rims constructed. as above described as compared
with rims as heretofore made also renders them much more efficient in prevent-
ing overheating of the tread and cover of the tyre as the metal rim is a good
conductor and conveys such heat to its external surface whence it is at once
radiated into the atmosphere.

page_text: tion 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 improvements in wheel rims more especially of the
kind adapted to receive pneumatic tyres of the type described in my former
Patent No. 29945 of 1897, the object of the invention being to cheapen the manu-
facture of such rims and to enable them to be easily and inexpensively repaired
should they be injured, for example by being crushed against a stone or curb.
In carrying out the invention I form such rims in three parts, that is to say,
I provide a central recessed portion having lateral flanges, which are preferably
flat, and two side pieces, preferably of a U-shape in cross section, which are
adapted to be riveted, bolted or otherwise secured to the lateral flat flanges of
the central portion and to form lateral recesses for receiving the flanges upon
the tyre.
To enable the invention to be fully understood I will describe it by reference
to the accompanying drawing in which:-
Figure 1 is a plan of a portion of a wheel rim made according to the invention;
Figure 2 is a transverse section thereof; and
Figures 3 and 4 are views similar to Figures 1 and 2 of a slightly modified
construction of the rim.
a is the central recessed portion of my rim and b, are the lateral flanges
formed in one with the central portion a, the said lateral flanges b, being
preferably flat as shewn in the drawing. c, e are the two side pieces which, as
above mentioned, are preferably of U-shape in cross section as shewn in the
drawing. These side piece can be riveted to the lateral flanges b, b of the
central portion of the rim as shewn in the drawing or they may be bolted or
otherwise suitably secured to the said flanges b so as to form the lateral recesses
for receiving the lateral ribs or flanges upon the tyre.
The modification illustrated in Figures 3 and 4 is the same is that above
described except that the central portion a of the rim is provided with a metal
strip or band & which is applied against the bottom of the recess formed in the
said central portion and has for its object to strengthen the rim and act as a
continuous washer under the spoke nipples to prevent their being dragged
through the metal when pressure is applied by applying the strip in this manner
I am enabled to produce a rim of considerable strength for heavy work and
which is at the same time light.
With this construction of wheel rim it will be obvious that the manufacture
is considerably cheapened and it will also be clear that should the rim come in
contact with a stone for example, when the wheel is being used, so as to be
thereby damaged, the damaged ring can be easily removed from the central
portion of the rim and be replaced by a new one without the necessity of re-
moving the spokes; the U-shaped portion aforementioned also forms a con-
siderable protection against damage to the tyre itself from external causes such
as curbstones and the like.
The increased surface of rims constructed as above described as compared
with rims as heretofore made also renders them much more efficient in prevent-
ing overheating of the tread and cover of the tyre as the metal rim is a good
conductor and conveys such heat to its external surface which is much greater
in proportion than with existing forms of rims whence it is at once radiated
into the atmosphere.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
1. A wheel rim comprising a central recessed portion having lateral flanges
to which U or similar shaped side pieces are secured by bolts, rivets or other
„suitable means, substantially as, and for the purpose, hereinbefore described.

page_text: 2. A wheel rim comprising a central recessed portion and two U-shaped por-
tions to which is added a peripheral band or strip of metal so as to enable a rim
of light weight to be used for comparatively heavy loads without danger from
strain, substantially as herein before described.
3. The described construction of wheel rims whereby the radiating surface
thereof is increased so as to prevent overheating of the tread and cover of the
tyre, substantially as herein before described.
4. Wheel rims constructed substantially as herein before described and illus-
trated in the accompanying drawing.
P TY
1 1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.