Improvements in Hollow Wheel-rims and in the Method of Making the same.
Year: 1892

page_text: Date of Application, 27th Sept., 1892-Accepted, 29th Oct., 1892
COMPLETE SPECIFICATION.
Improvements in Hollow Wheel-rims and in the Method of Making
the same.
I, EDWARD WARWICK, of Alma Street, Aston in the County of Warwick,
Manufacturer, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
This invention consists in improvements in hollow wheel rims and in the method
of making the same the wheels made from my improved rims being suitable for use
on bicycles, tricycles, and other vehicles.
I will now proceed to describe the nature of my invention with reference to the
accompanying drawings similar letters refer to similar parts throughout the several
views.
Figure 1. represents a strip of metal with the side edges turned down.
Figure 2. represents Figure 1 with side edges turned in horizontally to form
grooves.
Figure 3. represents Figure 2 with the grooved horizontal edges turned
upwards.
Figure 4. represents Figure 3 with the grooved vertical edges turned over with
the groove horizontal on the upper side or face of strip.
Figure 5. represents Figure 4 pressed into the concave shape described in
reference to the index letter e together with the upper half or portion of
the rim.
Figure 6. represents a broken plan of Figure 5.
Figure 7. represents a strip of metal with the side edges bent over similar to
Figure 1.
Figure 8. represents the strip Figure 7 with the side edges bent inwards.
Figure 9. represents the strip Figure 8 with the side edges compressed to form
side grooves.
Figure 10 represents the upper and lower halves of the completed rim shewn
at Figure 5 after the side edges have been compressed and consolidated together.
In carrying out my invention I provide a strip of sheet steel or other suitable
metal of any required length and then by means of suitable rolls turn down the
edges as shewn at a Figure 1, I next take the strip of the section shewn at
Figure 1. and pass it through suitable rolls until the edges are bent over as shewn
at 6 Figure 2 forming two grooves one on each side of the strip.
I next take the strip of the section shewn at Figure 2 and pass it through
suitable rolls until the grooved edges are turned up in the vertical position shewn
at c Figure 3; I next take the strip of the section shewn at Figure 3 and pass it
through suitable rolls until the grooved edges are turned down into the horizontal
position shewn at d Figure 4; I next take the strip of the section shewn at
Figure 4 and pass it through suitable rolls until the strip is compressed into the
concave shape shewn at e Figure 5, thus completing the lower half or portion of
my improved rim.
In forming the upper portion of my improved rim I provide a strip of sheet steel
or other suitable metal of the required length and then by means of suitable rolls,
turn down the edges as shewn at f Figure 7; 1 next take the strip of the section
shewn at Figure 7 and pass it through suitable rolls until the edges fare bent over
as shewn at g.
I next take the strip as shewn at Figure 8 and pass it through suitable rolls until
the edges gare compressed into the groove shape shewn at h Figure 9. I next
take the strip as shewn at Figure 9 and pass it through suitable rolls, dies, or tools

page_text: until the strip is compressed into the concave shape shewn at k Figure 5 thus
completing the upper half or portion of my improved rim.
The upper half or portion is next placed over the lower half and lowered or
sprung into the position shewn at Figure 5, the turned over edges h passing into
the grooves provided to receive them as clearly shewn at Figure 5.
I next take the upper and lower strips after they have been loosely connected
together as shewn at Figure 5 and pass them through suitable rolls, dies or tools,
until the upper and lower strips are compressed together at the edges as shewn at
Figure 10 thus consolidating the parts together and forming a rigid hollow wheel-
rim specially suitable for use in the make up of cycle wheels and which can also
be used for a variety of other purposes as my invention consists essentially in the
method of making rims as hereinbefore described.
The strips of metal can be of any required gauge in accordance with the width
of the completed rim from m to n. The upper and lower strips are further secured
together at m and n by soldering or by brazing.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1st. The making of hollow wheel rims by the process of rolling or otherwise
bending the edges of the upper portion as illustrated and described in reference
to f g h Figures 7, 8, and 9 and afterwards cupping or dishing the strip or plate as
illustrated and described in reference to k Figure 5.
2nd. The making of hollow wheel-rims by the process of rolling or otherwise
bending the edges of the lower portion as illustrated and described in reference
to a b c d Figures 1, 2, 3, 4, and 5, and afterwards cupping or dishing the strip or
plate as illustrated and described in reference to e Figure 5.
3rd. The making of hollow-wheel-rims by the union, combination, and con-
solidation of an upper and a lower portion as illustrated and described in reference
to Figures 5, and 10.
Dated this 23rd day of Sentember 1809
EDWARD WARWICK.
Witness:
ALFRED WILLIAM TURNER,
Engineers' Pattern Maker and Enrolled Patent Agent,
Cobden Buildings, Corporation Street, Birmingham.