Tricycles, and other Velocipedes.
Year: 1885

page_text: .
Tricycles, and other Velocipedes.
I THOMAS WARWICK of Alma Street Aston near Birmingham in the County of
Warwick Manufacturer do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN THE METALLIC RIMS OF THE WHEELS OF BICYCLES TRICYCLES
AND OTHER VELOCIPEDES " to be as follows:-
My invention consists in constructing the hollow metallic rims of the wheels of
bicycles tricycles and other velocipedes of two trough shaped strips of sheet metal
fitted one within the other and connected together edge to edge in the manner
hereinafter described.
Metallic rims made according to my invention possess great rigidity and strength
besides which they are simple in construction and readily manufactured. In
making a hollow metallic rim according to my invention I take a trough shaped
strip made from sheet iron or steel or other hard and ductile metal or alloy having
Dearly the sectional figure of the ordinary rim but somewhat deeper and I take
a second trough shaped strip made from sheet iron or steel the said second strip
being of about one third the depth of the other strip and of such a diameter that
it will fit within the first named or outer strip. I will call this second or smaller
strip the inner or strengthening strip. The said inner or strengthening strip may
have any desired sectional figure for example it may have a curved or bow figure
or an angular figure in cross section. The edges of the outer and inner strips are
connected together in the following manner. The longitudinal edges of the outer-
trough strip are turned inwards and upwards so as to form seats at the inner sides
of the edges of the trough strip into which seats the edges of the inner trough
strip are introduced the flat or convex side of the inner strip being presented to
the concave side of the outer strip. By one or more drawing operations the edges
of the two strips are coiled or folded and closed upon one another on the inner
sides of the rim so as to securely join the two strips together. The fixing together
of the edges of the two strips may either be effected by coils or folds situated
parallel to the sides of the rim or at right angles to the said sides.

page_text: By means of the inner strengthening strip at the open end of the outer or
principal strip of the rim a hollow rim of great strength and rigidity is formed
and the collapsing of the hollow rim is effectually prevented.
The metallic spokes of the wheel are passed through the two strips of the hollow
rim and fastened in the ordinary way.
Improvements in the Metallic Rims of the Wheels of Bicycles,
Tricycles, and other Velocipedes.
I THOMAS WARWICK of Alma Street, Aston near Birmingham in the County of
Warwick, Manufacturer do hereby declare the nature of my Invention for
"IMPROVEMENTS IN THE METALLIC RIMS OF THE WHEELS OF BICYCLES, TRICYCLES
AND OTHER VELOCIPEDES" and in what manner the same is to be performed to
be particularly described and ascertained in and by the following statement :-
My invention consists in constructing the hollow metallic rims of the wheels of
bicycles, tricycles and other velocipedes of two trough shaped strips of sheet metal
fitted one within the other and connected together edge to edge in the manner
herein after described.
Metallic rims made according to my invention possess great rigidity and
strength besides which they are simple in construction and readily manufactured.
In making a hollow metallic rim according to my invention I take a trough
shaped strip made from sheet iron or steel or other hard and ductile metal or alloy
having nearly the sectional figure of the ordinary rim but somewhat deeper and
I take a second trough shaped strip made from sheet iron or steel the said second
strip being of about one third the depth of the other strip and of such a diameter
that it will fit within the first named or outer strip. I will call this second or
smaller strip the inner or strengthening strip. The said inner or strengthening
strip may have any desired sectional figure, for example it may have a curved or
bow figure or an angular figure in cross section. The edges of the outer and
inner strips are connected together in the following manner. The longitudinal
edges of the outer trough strip are turned inwards and upwards so as to form seats
at the inner sides of the edges of the trough strip into which seats the edges of
the inner trough strip are introduced, the flat or convex side of the inner strip
being presented to the concave side of the outer strip. By one or moré drawing
1 3

page_text: operations the edges of the two strips are coiled or folded and closed upon one
another on the inner sides of the rim so as to securely join the two strips together.
The fixing together of the edges of the two strips may either be effected by coils
or folds situated parallel to the sides of the rim or at right angles to the said sides.
I will now proceed to describe with reference to the accompanying Drawing the
manner in which my invention is to be performed.
In making the outer trough shaped strip of the hollow rim, I take a blank or
strip of sheet metal of the kind represented in Figure 1 and by drawing operations
first give it the sectional form represented in side elevation and end elevation in
Figure 2 and afterwards the sectional form represented in side elevation and end
elevation in Figure 3. The outer trough strip thus formed is marked a.
In making the inner or strengthening trough strip I take a blank or strip of
sheet metal of the kind represented in Figure 4 and by a drawing operation give
to the said blank the trough forın represented in side elevation and end elevation
in Figure 5 and marked b. To connect together the edges of the outer and inner
trough strips a, b the inner trough strip b is placed within the outer trough strip a
together with a mandril o having the sectional form of the upper part of the outer
strip as represented in end elevation in Figure 6 and side elevation in Figure 7
and the combined parts are subjected to a drawing operation whereby the longi-
tudinal edges d, d of the outer trough strip a are turned inwards and upwards so
as to form seats at the inner sides of the outer trough strip for receiving the
edges of the inner trough strip b as represented in end elevation in Figure 8 and
side elevation in Figure 9 the seats being marked e, e and the edges of the inner
trough strip held in the said seats being marked f. f. Or the seats e, e may be
formed in the outer trough strip a before the edges of the inner strip b are inserted
in them.
The combined strips a and b represented in Figures 8 and 9 supported by the
mandril c are next subjected to one or more drawing operations whereby the edges
of the two strips are folded upon one another on the inner side of the rim so as to
securely join the two strips together as illustrated in end elevation in Figure 10
and side elevation in Figure 11. By the folding of the edges of the two strips so
as to securely join them together, flanges or projections situated at right angles to
the sides of the rim and on the inner sides thereof are produced with which flanges
or projections the india rubber tyre of the wheel is made to engage to secure it to
the rim as hereinafter described.
Instead of folding the edges of the strips a, b upon one another in the manner
represented in Figures 10 and 11 they may be coiled upon one another in the
manner represented in end elevation in Figure 12 and side elevation in Figure 13,
flanges or projections parallel to the sides of the rim being thereby formed for the
india rubber tyre to engage with. By the use of the inner strengthening strip b
at the open end of the outer or principal strip a of the rim, a hollow rim of great
strength and rigidity is formed and the collapsing of the hollow rim is effectually
prevented.
The metallic spokes of the wheel are passed through the two strips a, b of the
hollow rim and fastened in the ordinary way.
Instead of making the inner strengthening strip of an angular figure in cross
section as represented in Figures 10. 11. 12. and 13 it may have the curved or bow
figure represented in Figures 14. 15. 16 and 17; Figures 14 and 15 representing
a rim having the inner flanges or projections at right angles to the sides of the
rim and Figures 16 and 17 representing a rim having the inner flanges or pro-
jections parallel to the sides of the rin. In these cases the bottom of the mandril o
is made concave to fit the convex side of the strengthening strip b.
In place of forming seats in the outer or principal trough strip for receiving the
edges of the inner or strengthening strip the edges of the two strips may be
soldered or brazed together as represented in Figure 17ª. By one or more drawing
operations the joined edges of the two strips a, b Figure 17ª are folded at right

page_text: angles to the sides of the strips to form the inner flanges or projections of the rim
in the manner described with respect to Figures 14 and 15.
Figure 18 represents in end elevation and Figure 19 in side elevation, a finished
hollow metallic rim of the kind represented in Figures 14 and 15 provided with
the india rubber tyre h and Figure 20 represents in end elevation and Figure 21
in side elevation a portion of a finished hollow metallic rim of the kind represented
in Figures 16 and 17 provided with an india rubber tyre h, the said tyres h, h being
fitted upon the flanges or projections at the inner sides of the rims as represented.
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
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Making the hollow metallic rims of the wheels of bicycles, tricycles and other
velocipedes of two trough shaped strips of sheet metal fitted one within the
other and connected together edge to edge substantially as herein before described
and illustrated in the accompanying Drawing, whereby a hollow rim of great
strength and rigidity is formed and the collapsing of the hollow rim is effectually
prevented.
Dated this Tenth day of December 1885.