Improvements in or connected with Velocipede Driving Mechanism.
Year: 1896

page_text: Date of Application, 21st Aug., 1896
Complete Specification Left, 21st May, 1897-Accepted, 3rd July, 1897
Improvements in or connected with Velocipede Driving Mechanism.
I, JAMES MOUNTFORT CLARKSON, of Westmoreland Avenue, Bridlington-Quay, in
the County of York, Engineer, do hereby declare the nature of this invention to be
as follows:-
The object of my invention is to provide suitable driving mechanism, whereby the
speed of a velocipede may be increased without increasing the speed of the pedal
shaft.
According to my invention, I employ an auxiliary shaft at a suitable distance in
front of the pedal shaft, the said auxiliary shaft being mounted in bearings and
carried by the frame of the machine in any convenient manner. Instead of mounting
the chain-wheel upon the pedal shaft as in machines at present in use, 'I mount it
upon the auxiliary shaft, and connect same with the small chain-wheel on the driving
axle of the machine. At the opposite side of the frame to that of the chain gearing,
and on the pedal shaft, I mount a spur wheel, which, through the medium of an
intermediate spur wheel, gears with a spur pinion situated on the auxiliary shaft;
and the spur wheel and pinion are of such relative sizes as to increase the speed of
the auxiliary shaft over that of the pedal shaft to any required degree. This
increased speed of the auxiliary shaft is transferred to the driving axle of the
velocipede through the medium of the chain gearing, which latter again multiplies
the speed.
Improvements in or connected with Velooipede Driving Mechanism.
I, JAMES MOUNTFORT CLARKSON, of Westmoreland Avenue, Bridlington-Quay, in
the County of York, Engineer, 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 my invention is to provide suitable driving mechanism, whereby the
speed of a velocipede may be increased without increasing the speed of the pedal
shaft.
In order that my invention may be clearly understood, I will proceed to describe
same with reference to the accompanying drawing, in which similar letters refer to
like parts in both figures.
Figure 1 is a side elevation, shewing a portion of a velocipede with my invention
applied thereto, and Figure 2 is a plan of same.
According to my invention, I employ an auxiliary shaft A at a suitable distance
froin the pedal shaft B, the said auxiliary shaft A being mounted in bearings C
which are carried by the frame D of the machine.

page_text: Instead of mounting the large chain-wheel E upon the pedal shaft B as in machines
at present in use, I mount such wheel E upon the auxiliary shaft A, and connect
same with the small chain-wheel on the driving axle of the machine. At the opposite
side of the frame D to that of the chain-wheel E, and on the pedal shaft B, I. mount a
spur wheel F, which, through the medium of an intermediate wheel G, gears with a
spur pinion Hou the auxiliary shaft A; and the spur wheels and pinion are of such
relative sizes as to increase the speed of the auxiliary shaft A over that of the pedal
shaft B to any required degree. This increased speed of the auxiliary shaft A is
transferred to the driving axle of the velocipede through the medium of the chain
gearing, which latter again inultiplies the speed.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
1. In velocipede driving mechanism, the employment of an auxiliary shaft which,
carries the chain-wheel, said auxiliary shaft being driven from the pedal shaft by
spur gearing, substantially as and for the purposes set forth.
2. In velocipede driving mechanism, the auxiliary shaft A, pedal shaft B
chain-wheel E, and spur wheels F, G and H, substantially as and for the purposes
Bet forth.