Improvements in the Manufacture of Metallic Rims for the Wheels of Bicycles and other Velocipedes, Motor Cars, and Road Vehicles.
Year: 1897

page_text: Date of Application, 18th June, 1897
Complete Specification Left, 18th Mar., 1898-Accepted, 14th May, 1898
Certain Improvements in the Manufacture of Metallic Rims for the
Wheels of Bicycles and other Velocipedes, Motor Cars, and Road
Vehicles.
I, ARTHUR WHITTALL, of 4, Comberton Terrace, Kidderminster, in the County,
of Worcester, Gentleman, do hereby declare the nature of this invention to be as
follows:-
This invention has reference to metal rims for the wheels of bicycles and other
velocipedes motor cars and road vehicles and consists in making the said wheel
rims in the several ways herein described whereby I am enabled to produce the
said wheel rims cheaply and to make them of double thickness of metal where the
spoke nipples pass through.
As an example I will describe my invention as applied to a rim for a cycle
which is required to be used with what is known as the Welch-Dunlop tyre but
it is to be understood that my invention is applicable to trough section wheel rims
of all kinds.
A wheel rim constructed according to this invention is formed essentially of two
sheet metal hoops each of which is somewhat wider than one half of the width of the
wheel rim and they are so shaped that they will fit together one within the other so
that when soldered or otherwise secured together they form the trough section wheel
rim with the bottom of the trough of two thicknesses of metal where one hoop
overlaps the other. Each of these hoops is by preference raised from a circular
sheet metal blank which is stamped in dies or is spun in a lathe to the shape
of a shallow dish the bottom of which is pierced out leaving the rim forming a
hoop of the proper section corresponding with a little more than one half of
the required wheel rim, the smaller part of the hoop corresponding with where the
bottom has been pierced out being of the proper size to fit inside or outside the
corresponding part of the other hoop. These two hoops are secured together by
tinning or soldering or other like means and by the edge of the smaller diameter
of the inner hoop being spun or turned over a shoulder formed at the bottom.
of the trough of the other hoop which thus securely fixes the two hoops together.
For additional strength the part of the outer hoop from which the bottom has
been pierced can be spread outwardly within the trough of the rim so that the
sides of the trough will then for a certain distance be formed of double thickness
of metal like the bottom of the trough thus considerably strengthening the rim.
The edges of the rim may be turned inwardly or outwardly or bent in any desired
form as now well known according to the particular tyre with which the rim is
to be used.
When the rim is required to be what is known as a hollow rim this is effected
by combining with the rim formed as above described another metal hoop or band
which is fixed round the rim within the trough of the same so as to enclose a
space between the hoop and the rim proper and thus impart additional strength
to the rim. This additional hoop may if desired instead of being made as a single

page_text: hoop as above described be made of two hoops combined and fixed together as
above described with reference to the rim proper.
Instead of the said hoops being raised from sheet metal so as to be jointless
as above described the said hoops may is desired be made from drawn metal strips
the ends of which are brazed together.
478
n
100K
Certain Improvements in the Manufacture of Metallic Rims for the
Wheels of Bicycles and other Velocipedes, Motor Cars, and Road
Vehicles.
I, ARTHUR WHITTALL, of 4, Comberton Terrace, Kidderminster, in the County
of Worcester, Gentleman, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention has reference to metal rims for the wheels of bicycles and other
velocipedes motor cars and road vehicles and consists in making the said wheel
rims in the several ways herein described whereby I am enabled to produce the
said wheel rims cheaply and to make them of double thickness of metal where the
spoke nipples pass through.
As an example I will describe my invention as applied to a rim_for_a cycle
wheel which is required to be used with what is known as the Welch-Dunlop tyre
but it is to be understood that my invention is applicable to trough section wheel
rims of all kinds.
On the accompanying drawing Fig. 1 is a cross section of one form of wheel rim
constructed according to this invention; Fig. 2 is a cross section of one of the
hoop parts of the said wheel rim and Fig. 3 is a cross section of the other hoop
part of the same before they are secured together; Fig. 4 is a cross sectional ele-
vation of a dish like sheet metal stamping from which the part shewn in Fig. 2.
is formed and Fig. 5 shews the same stamping which is represented by Fig. 4
but with the bottom pierced out; Fig. 6 is a cross section of another form of wheel
rim constructed according to this invention; Figs. 7, 8 and 9 are each cross
sections of other forms of wheel rims constructed in accordance with this invention;
and Fig. 10 is a cross section of one of the two hoop parts of which the wheel
rim shewn by Fig. 9 is formed.
The same letters of reference indicate the same or corresponding parts in all
the figures of the drawing.
A wheel rim constructed according to this invention is formed essentially of
two sheet metal hoops each of which is somewhat wider than one half of the width
of the wheel rim and they are so shaped that they will fit together one within
the other so that when permanently secured together as hereinafter described
they form the trough section wheel rim with the bottom of the trough of two
thicknesses of metal where one hoop overlaps the other. These two hoops are
secured together by tinning or soldering or brazing and by the edge of the smaller
diameter of the inner hoop being spun or turned over a shoulder formed at the
bottom of the trough of the other hoop which thus securely and permanently
fixes the two hoops together.
In the example of my invention illustrated by Figs. 1 to 5 both inclusive, the

page_text: two sheet metal hoops of which the rim is formed are marked respectively A and B.
It will be seen that each hoop is somewhat wider than one half of the width of
the wheel rim and thus has the shape of one side of the trough and the bottom of the
same, that is to say, the larger portion of the hoop A forms one side a¹ of the
trough of the rim and is shouldered down at a² to the smaller cylindrical part a³
which corresponds with the bottom of the trough; similarly the upper portion
of the hoop B forms the other side 6 of the trough of the rim and is shouldered
down at to the smaller cylindrical part 63 which corresponds. with the bottom
of the trough this part 63 being of the proper size to fit outside the cylindrical
part a³ of the other hoop A as far as the shoulder 2 will allow. The part a³ is
made somewhat wider than the part 63 so that when the two hoops A. and B have
been placed together as above described the projecting edge at of the part a³ is
by spinning tools in a lathe or by other means closed over and outside the
shoulder 63 at a as shewn by Fig. 1. The meeting surfaces are then soldered
or brazed together and thus the two hoops A and B are permanently fixed
together as shewn in Fig. 1 making the bottom of the trough of the rim where
the spoke nipples pass through of two thicknesses of metal where the part a³ of
the hoop A overlaps the corresponding part 63 of the hoop B.
'
Each of the hoops A and B is by preference raised from a circular sheet metal
blank in the way well known in the manufacture of other trough section wheel
rims, this blank being stamped in dies or spun in a lathe to the shape of a shallow:
dish such for instance as shewn by Fig. 4 the bottom a is pierced out leaving a
hoop of the proper section above described corresponding with a little more than
one half of the required wheel rim the smaller part a³ of the hoop corresponding
with where the bottom is pierced out being of the proper size to fit inside or out-
side the corresponding part of the other hoop.
For additional strength the part 63 of the said outer hoop 13 from which the
bottom has been pierced can be made somewhat wider than the bottom of the
trough and then be spread outwardly as shewn in Fig. 6 within the trough so that
the sides of the trough of the rim will then for a certain distance up from the
bottom be both formed of double thickness of metal like the bottom of the trough
thus considerably strengthening the rim.
The edges as of the rim may be turned inwardly or outwardly or bent into
any desired form as now well known according to the particular tyre with which
the rim is to be used.
When the rim is required to be what is known as a hollow rim such as shewn
for instance by Fig. 7 this is effected by combining with the rim formed in either
of the ways above described and shewn by Figs. 5 and 6 another metal hoop or
band C which is fixed round the rim within, the trough of the same so as to enclose
the space between the hoop C and the rim proper A B and thus impart additional
strength to the rim.
This additional hoop may if desired instead of being made as a single hoop as
above described and represented by Fig. 7, be made as shewn in Fig. 8 of two
hoops C Ca shaped and combined and fixed together so as to make a trough
section hoop with the bottom of the trough of double thickness of metal per-
manently secured together as above described with reference to the two hoops A
and B which form the rim proper.
Instead of the hoops A B C and being stamped and raised from sheet metal
so as to be jointless as above described the said hoops may if desired be made from
metal strips drawn to the proper sections and turned into the hoops with the ends
of the strips brazed together.
In the example of my invention shewn by Fig. 10 the two hoops A and B are
as above described respectively made with the cylindrical parts a³ and 63 to fit
one within the other and these parts a 63 are made straight as shewn by Fig. 10
before the hoops are inserted one within the other but after they have been so
inserted they are secured by spinning or rolling the overlapping flat parts a³ þ³
.

page_text: into the corrugated form shewn by Fig. 9 and then finally permanently secured
by soldering brazing or the like as above described.
I would here remark that in order to render the construction of my wheel rims
more clear I have on my drawing represented the adjacent surfaces of the hoops
forming the wheel rim as being not in actual contact but it will of course be
understood that in the actual wheel rims there is no space between the adjacent
surfaces of the hoops as they are tinned soldered or brazed together.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:
-
1. The improved trough section metallic wheel rim consisting of two sheet
metal hoops such as A Beach of which is made of about the section but somewhat
wider than one half of the width of the rim the said hoops being respectively
made with shoulders a³ b² and with cylindrical parts ³ ³ which latter fit one
within the other the said two hoops being permanently fixed together by tinning
soldering or brazing and by the edge of the cylindrical part of the inner hoop
being closed over the shoulder formed on the outer hoop substantially as herein-
before described and illustrated by Fig. 1 of the accompanying drawings.
2. The improved trough section metallic wheel rim consisting of two sheet
metal hoops such as A B each of which is made of about the section but somewhat
wider than one half of the width of the rim the said two hoops being respectively
made with shoulders a² 62 and with cylindrical parts a³ 63 which latter fit one
within the other the outer hoop being strengthened by having the edge of its
cylindrical part turned outwardly at 6 within the other hoop the said two hoops.
being permanently fixed together by tinning soldering or brazing and by the edge
of the cylindrical part of the inner hoop being closed over the shoulder formed
on the outer hoop substantially as hereinbefore described and illustrated by Fig. 6
of the accompanying drawings.
3. The improved trough section metallic wheel rim consisting of two sheet
metal hoops such as A B and the ring C each of the said hoops being made
of about the section but somewhat wider than one half of the width of the rim
and respectively made with shoulders a² 62 and cylindrical parts a³ 63 which latter
fit one within the other the said two hoops being permanently fixed together by
tinning soldering or brazing and by the edge of the cylindrical part of the inner
hoop being closed over the shoulder formed on the outer hoop, the said ring C
being fixed in the trough of the rim so as to make what is known as a hollow rim
all substantially as hereinbefore described and illustrated by Fig. 7 of the accom-
panying drawings.
4. The improved trough section hollow metallic wheel rim consisting of four
sheet metal hoops such as A B C¹ C² shaped and permanently fixed together in
the manner and substantially as hereinbefore described and illustrated by Fig. 8
of the accompanying drawings.
5. The improved trough section metallic wheel rim consisting of two sheet
metal hoops such as A B made of about the section but somewhat wider than one
half of the width of the rim and with cylindrical parts a³ 63 which fit one within
the other said hoops being permanently fixed together by tinning brazing or
soldering and by the overlapping cylindrical parts being pressed or rolled into
annular corrugations substantially as hereinbefore described and illustrated by
Fig. 9 of the accompanying drawings.
Dated this 17th day of March 1808
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.