A Chainless and Folding Bicycle.
Year: 1897

page_text: Date of Application, 18th Mar., 1897-Accepted, 26th June, 1897
A Chainless and Folding Bicycle.
1, SIMON PIERRE FRANÇOIS LEHMKUHL, of 122 Malakkastraat, The Hague,
in the Kingdom of The Netherlands, Engineer, do hereby declare the nature of
my invention for "A chainless and folding bicycle" 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 a chainless and folding bicycle and is an improvement
of the bicycle of my Application numbered 26517/96. This folding bicycle has
two vertical steering axles, one above the axle of the rear wheel, the other above
of another construction as in
a point between the two wheels. The handle-bar
the usual manner to get room for the legs of the cyclist. There are two driving-
mechanisms, one at each side of the rear wheel and each consisting of a little
toothed ring fixed on the axle of the rear wheel, which is enlarged and a great
toothed ring fixed to the frame by means of balls.
With reference to the drawings:
Sheet I shows a side elevation of such a chainless and folding bicycle.
This
A and A are enlarged axles, (made dustproof), that of the rear wheel with toothed
rings, d driving mechanism, consisting of a toothed ring with the crank c.
toothed ring also made dustproof; a₁ and a₁ are vertical steering axles.
Sheet II is a section M N of Sheet I.
A is the axle of the rear wheel with holes to show the construction.
f is the frame, which makes at the same time the construction dustproof.
r and rare toothed rings, c are cranks, fixed to the toothed rings r₁.
Sheet III. Fig. 1 and Fig. 2 show the bicycle in folded state.
11
W rear wheel, W, front wheel, f frame, a₁ and a vertical steering axles. Fig. 3
shows how the handle bar can turn round a vertical axle a a. The handle bar namely
consists of two parts, one H and the other H₁ and the part.H can turu round the
vertical axle a a. P and p of the part H, prevent the part H from turning round the
axle a a, but if the screws is unscrewed the part H goes upwards and then it is
possible to turn it round the axle a a and to give it the position of Fig. 1 and
Fig. 2.
.
There are several modifications, for instance Fig. 4. Here C C are the vertical
axles and this bicycle is of reduced construction.
It is unnecessary to say that it is easy to make a construction by means of which
the rear steering axle can be fastened. This folding bicycle would be certainly a
very good military. bicycle.
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
A chainless and folding bicycle of which the rear wheel is driven by two driving
mechanisms, one at each side of the rear wheel and each consisting of a toothed
ring (or wheel) gearing with a smaller toothed ring (or wheel) which is fixed on
the enlarged (or usual) axle of the rear wheel and having two vertical steering
axles, one above the axle of the rear wheel and the other above a point situated

page_text: between the two cycle wheels and having a handle bar consisting of two parts of
which one can turn round a vertical axle of the other and being of a construction
as shown in Sheet III of my specification.
S. P. F. LEHMKUHL.