Year: 1889

page_text: Date of Application, 5th July, 1889-Accepted, 10th Aug,, 1889
A communication from A. KNUBEL, of Münster, in the Empire of Germany,
Manufacturer.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex, M.I.M.E.,
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:-
The object of the present invention is to compensate for the centrifugal force
produced when describing sharp curves quickly with velocipedes having three or
more wheels.
It is a well known fact that to preserve the stability of vans or carriages running
on rails round sharp curves the outer rail is placed on a higher level than the inner
one and that in proportion to the radius of the curve and the speed it is further
well known that rider and horse incline to the inner side when describing a curve
and incline all the more if the curve be sharp and the speed great.
If these precautions were not followed the van or carriage would be upset and
the rider thrown off his horse by the centrifugal force.
The present invention has for its object to permit of an inclined position of the
wheels of velocipedes and of the rider when rounding sharp curves to compensate for
the centrifugal force and prevent the rider from being thrown.
In the accompanying drawings ;-
Fig. 1 represents a front elevation.
Fig. 2 a side elevation, and
Fig. 3 a plan of the arrangement as applied to a tricycle.
Contrary to the general arrangement there is only one driving wheel T and two
trailing wheels L which latter are also steering wheels. The saddle pillar S is
arranged over the driving wheel and the pedal crank K with the pitch wheel R is
mounted in the frame G between the driving and steering wheels. The frame G
is pivotted in the steering frame V by means of a pin or screw C thus permitting
of the steering of the front wheels." If the steering frame is therefore inclined
from the vertical the frame G with the saddle pillar S and the driving wheel will
also be inclined correspondingly.
To permit of a uniform inclination of the steering wheels and steering frame and
consequently of the driving wheel and the saddle the following arrangement is made;
Each of the steering wheels has its own axle A round which it turns and to which
is fixed a cross piece Q and these cross-pieces are connected with the steering
frame V by pivotted links B.
When describing curves in consequence of these pivotted links B the steering
wheels and with them the whole machine together with the rider will incline to one
side in proportion to the centrifugal force produced, both steering wheels L remaining
on the ground in consequence of their being connected by pivotted links.
upsetting of the machine is therefore prevented and the support of the rider remains
the same, all three points of support being in contact with the ground.
An
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is ;-
1. In a velocipede the arrangement of the wheels L each of which is provided with
its own axle A and connected with each other and with the steering frame V by
means of pivotted link rods such as B which arrangement permits of the machine

page_text: describing curves in an inclined position without any wheel being lifted from the
ground and the rider being in danger of being thrown substantially as herein
described and illustrated in the accompanying drawings.
2. The complete steering mechanism for velocipedes substantially as described and
illustrated in the accompanying drawings.
Dated this 5th day of July 1889.
W. P. THOMPSON & BOULT,
Agents.