Improvements in Wheel Rims.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Wheel Rims.
We, FRANK CAVE, Secretary of the Nottingham Machinists Company,
Limited, of Kensington Works, Ilkeston, in the County of Nottingham,
Manufacturers of Cycle Parts, WILLIAM HIGGINS Mechanic of the works
aforesaid, and THOMAS GALLAND MELLORS, of 1, King John's Chambers,
Bridlesmith Gate, Nottingham, in the county aforesaid, Receiver of the
Company in voluntary liquidation, do hereby declare the nature of this
invention to be as follows:--
Our invention relates to an improved hollow wheel rim, and it consists in
constructing the rims out of strips of sheet metal, the edges of which are joined
together by means of the interlocked joints described and claimed in Patent
No. 14890 of 1889 granted to John Henry Ball.
The strip of metal is first made into tubular form by means of the interlocked
joint as aforesaid, after which the tube is passed through suitable rolls whereby its
shape is altered to give it the desired shape in cross section of the finished rim, the
interlocked joint being in the centre of the bottom of the groove of the rim and
the outer and inner walls in contact.
The interlocked joint may if desired be soldered down but this is not
obligatory.
The groove of the rim may be made of any shape according to the tyre it is
intended to carry.
L
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of Manah 1805
ROBERT E. PHILLIPS, M.I. Mech. E.,
Consulting Engineer and Patent Agent,
Chancery Lane, London, W.C., Agent for the Applicants.
Improvements in
We, FRANK CAVE, Secretary of the Nottingham Machinists Company,
Limited, of Kensington Works, Ilkeston, in the County of Nottingham,
Manufacturers of Cycle Parts, WILLIAM HIGGINS Mechanic of the works
aforesaid, and THOMAS GALLAND MELLORS, of 1, King John's Chambers,
Bridlesmith Gate, Nottingham, in the county aforesaid, Receiver of, the
nature of this
Company in voluntary liquidation, do hereby declare the
invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:-
Our invention relates to an improved hollow wheel rim which is constructed out
of a single strip of sheet metal made first into tubular form with its edges joined
by means of the interlocked joint described and claimed in Ball's Patent No. 14890
of 1889, and then drawn or rolled until the desired shape in cross section is attained
and the interlocked joint lies in the centre of the bottom of the groove of the rim
with the concave and convex walls in contact.

page_text: The accompanying drawing is a view of one section of our improved rim, the
parts of the interlocked joint being slightly separated for distinctness.
The rim is made of one strip of steel, aluminium or other metal and the process
of manufacture that we prefer to follow is as follows:-The strip is first put
through suitable rolls to bring it to a channel section, it is then spouted and its
edges folded to make the interlocked joint by drawing through suitable dies. The
joint thus formed is then rolled down against a mandrel inserted in the tube. The
section thus formed is cut into lengths and bent on a drum with a mandrel inside
of the required shape in cross section to give the rim its finished shape, a roller
being used to press the joint down to the bottom of the channel or groove.
The rim is then fitted with a liner and the joint is brazed, soldered or rivetted.
The circumferential joint in the groove of the rim may be soldered all round if
desired.
By this construction a very strong but light and rigid rim is obtained, as
even with metal of the light gauge, sufficient thickness is obtained at that part
adapted to receive the heads of the spokes to ensure their not being pulled
through.
It will be understood that the shape of the groove in the rim may be varied
according to the type of tyre it is intended to carry.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
A hollow wheel rim of the special construction and arrangement of joint as
shown by the accompanying drawing, such joint being located at the bottom of the
groove of the rim in contact with the outer wall thereof whereby a fivefold
thickness is obtained where the spokes pass through.
Pated this 17th day of December 1905.
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicants.