An Improved Tool for Detaching and Replacing Pneumatic Tyres on Wheel Rims.
Year: 1898

page_text: Date of Application, 19th Nov., 1393-Accepted, 23rd Dec., 1898
COMPLETE SPECIFICATION (AMENDED).
An Improved Tool for Detaching and Replacing Pneumatic Tyres on
Wheel Rims.
I, REGINALD ADAMS, of "Brooklyn," Tarring Road, Worthing, Sussex, Cycle
Maker, 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:-
My invention relates to an improved tool used for the purpose of detaching and
replacing pneumatic tyres on bicycle and tricycle wheel rims and consists essen-
tially in constructing a tool that can be used as a holder for facilitating the
replacing of tyres, whether or not the same tool is also adapted for detaching
tyres. My improved tool in the form intended for detaching as well as for
replacing tyres, is used as a lever and is adapted to engage with the wheel so as
to be retained automatically in its operative position in the same manner as the
tools described in Doran's Specification No. 16706 A.1). 1897 and in Swanton's
Specification No. 30564 A.D. 1897.
In order that my invention may be more readily understood reference is made
to the accompanying drawings, in which,
Fig. 1, is a front view of my improved tool.
Fig. 2 is a sectional view of the same.
Fig. 3 is a back view of the tool.
Fig. 4 is a front view of a tool used for the purpose of replacing a tyre only.
Fig. 5 is a sectional view of the same.
Fig. 6 is a plan of the underside of the flange of Fig. 5.
Fig. 7 is a view of the rim of a wheel and spokes shewing my invention as
applied for detaching a tyre; and
Fig. 8 is a view shewing the method of replacing a tyre by means of the
tools, Fig. 2 or Fig. 5..
The same letters of reference apply in all the figures.
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In carrying out my invention I make use of a piece of iron, steel, bone or
other suitable metal or material, "a," of any desired length and shaped as
shewn in Fig. 2; the upper part being formed in the shape of a crook, "b," the
end of which, "e," is turned up and is also made wider than the other part of the
tool. In this wider portion are cut two slots, "d" of requisite depth to clutch
the spokes of the wheel. The other end of the tool is shaped to a curve
in order to slip in with ease between the outer case and the rim of the wheel.
When it is desired to have a tool for replacing tyres only I adopt a slightly
different shape as shewn in Figs. 4, 5 and 6. I make use of a crook "f" simi-
lar in shape to that of "6" Fig. 2 but without the projections "c"; the lower
end of the tool is made with a flange "g" into which are cut two or three
slots "h" used for clutching the spokes.

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In using my invention if it is desired to detach the tyre I place the end "e
of the tool between the cover of the tyre and the rim taking care to avoid the
inner tube. I then bend the tool downwards until the crook end is in line with
the spokes; when this is done the slot "d" in the projection C "should be
placed over the spoke and the tool is held tightly in position, shewn in Fig. 7.
This operation causes a small portion of the tyre to slip over the rim and by
pressure the whole can easily be removed. When replacing the tyre I inflate
the inner tube slightly and then force a portion of the outer case over the rim
and keep it in position by placing the crook end "6" on the edge of the same,
the pressure of the case keeping the tool in position by forcing the lower edge
tight against a spoke. This leaves the two hands free to work the remainder
of the tyre over the rim and simplifies the operation considerably.
When the replacing tool, Fig. 6, is used the operation is very similar; a por-
tion of the outer case is forced over the rim and the crook end "of the
replacer is inserted between the tyre and rim, one of the slots "h" will fit over
a spoke, Fig. 8, holding it securely in position. The hands are thus left frce
to work the remainder of the tyre over the rim.
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:-
First. An improved tool made of any suitable metal or material and shaped
and to be used as described in the specification and illustrated in the accom-
panying drawings for the purpose of detaching or replacing the outer case of
neumatic tyres on bicycle or tricycle wheel rims.
Second. An improved tool made of any suitable metal or material and shaped
and to be used as described in the specification and illustrated in the accom-
panying drawings for the purpose of replacing the outer case of pneumatic tyres
on Licycle or tricycle wheel rims.
1000