An Improved Propelling Device for Velootpedes.
Year: 1896

page_text: Date of Application, 17th Nov., 1896-Accepted, 3rd Apr., 1897
COMPLETE SPECIFICATION.
An Improved Propelling Device for Velootpedes.
I, MARTIN VAN LOOK, of No. 85 Mauritiuswall, Cologne on the Rhine, in the
German Empire, Manufacturer, do heroby deolaro 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 relatos to a propelling device for velocipedes by which the motion
of the treadlo is transmitted to the hind wheel by a specially constructed and supported
bevel wheel gearing.
In order that my invention may bo tho better understood I now proceed to describe
the same reference being had to the accompanying drawings and to the letters and
figures marked thereon. Like lettors refer to like parts in the various figures.
Figure 1 is a sido view (partly in sootion) of my devico, and Figure 2 shows a
horizontal section of the same.
A bevol wheel b is attached to the axle of tho trendle crank, which is supported at
both ends by cones running in double row ball bearings. The bevel whoel 6 engages
with another bevel wheel c, situated on the axle d which leads to the hind wheel, and
which axle may be either solid or hollow. The bevel wheel e situated on the other
end of this axle engages into the bovel wheelffixed to the hind wheel, so that the
transmission takes place in a simple manner by the four bevel wheels.
Ench of the ends of the axle d is supported adjacent to the bovel wheels cand e by
cones, running in a double row ball bearings, and this axle and the whole of the other
propelling mechanism, including the treadle crank axle, crank bevel wheels band f
are situated in a suitably constructed casing g, h,i, k, which can be opened and tightly
closed so as to absolutely prevent any detrimental influenco either inwards or outwards;
the whole device may be easily attached to any velocipode frame in place of the
propelling devices used hitherto.
A velocipede provided with this device has a very simple and elegant appearanco,
and is consequently oasily cleaned. As tho nse of a chain is avoided a considerable
part of the loss due to friction is saved, because the friction is much less with these
bevel wheels, particularly as their axlos rest in double row ball bearings whereby the
mutual pressure, which is otherwise unavoidable is obviated and very easy action is
obtained. For this reason such a velocipede will be far more easily propelled than a
chain geared volocipedo having the same proportions as regards the transmitting
mechanism, and it will therefore be practicable to use higher gear than in chain
velocipedes.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
A propelling mechanism for velocipedes in which the rotation of the treadle cranks
is transmitted to the hind wheel by a solid or hollow axle d, carrying bevel whicels cand e
engaging with bevel wheels band situated on the treadle crank axle and hind wheel
axle respectively, and arranged so that this transmitting axle d and the treadle crank
axle a are provided on both ends with oppositely disposed cones having each a double
row ball bearing, the whole mechanism including the treadle crank axle being contained

page_text: within a suitably constructed casing g, h, i, k, fixed to the frame, adapted to be opened
and tightly closed, substantially as described.
FELL & JAMES,
Agents for the Applicant.