Improvements in Velocipedes.
Year: 1892

page_text: Date of Application, 29th Oct., 1892
Complete Specification Left, 27th July, 1893—Accepted, 2nd Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Velocipedes.
I, JOHN JAMES SHIELDS HESLOP, of 11, Fawcett Street, Sunderland, in the
County of Durham, Grocer, do hereby declare the nature of this invention to be
as follows:-
:-
My invention relates to bicycles and other velocipedes of the kind in which the
pedal or crank axle forms the axis of the driving wheel and in which the pedal
shaft rotates independently of the driving wheel, the motion of the pedal shaft
being communicated to the said driving wheel through the medium of gearing.
According to my invention I provide an improved arrangement of gearing as
follows: Upon the pedal shaft I mount a gear wheel and upon the hub or boss of
the wheel to be driven I form gear teeth constituting a gear-wheel of less diameter
than the wheel first mentioned. In a suitable casing attached to the forks or
bearings carrying the pedal shaft I mount on shafts parallel to the pedal shaft two
double pinions, each of the said double pinions having a part of small diameter
adapted to gear with the teeth of the wheel of larger diameter on the pedal shaft
and a part of larger diameter adapted to gear with the wheel of smaller diameter
upon the hub or boss of the driving wheel. In practice one of these double pinions
is placed in front of the centre of the pedal shaft and the other behind the centre
of the said shaft so that when the machine is being ridden the twist which would
tend to take place in the casing if only one double pinion was employed will be
counteracted by the pull or twist exerted upon the other double pinion.
This arrangement of gearing will run very smoothly without any danger of the
teeth jamming.
It is to be understood that the wheels may be made with varying numbers of
teeth to suit the speed of rotation of the driving wheel relatively to the speed of
rotation of the pedal shaft.
Dated this 29th day of October 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Velocipedes.
I, JOHN JAMES SHIELDS HESLOP, of 1, Fawcett Street, Sunderland, in the
County of Durham, Grocer, 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 bicycles and other velocipedes of the kind in which the
pedal or crank axle forms the axis of the driving wheel and in which the pedal
shaft rotates independently of the driving wheel, the motion of the pedal shaft
being communicated to the said driving wheel through the medium of gearing.
According to my invention I provide an improved arrangement of gearing as
follows: Upon the pedal shaft I mount a gear-wheel and upon the hub or boss of
the wheel to be driven I form gear-teeth constituting a gear-wheel of less diameter
than the wheel first mentioned. In a suitable casing attached to the fork or to the
bearings carrying the pedal shaft I mount on shafts parallel to the pedal shaft two
double pinions, each of the said double pinions having a part of small diameter
adapted to gear with the teeth of the wheel of larger diameter on the pedal shaft

page_text: and a part of larger diameter adapted to gear with the wheel of smaller diameter
upon the hub or boss of the driving wheel. In practice one of these double pinions
is placed in front of the centre of the pedal shaft and the other behind the centre
of the said shaft.
To enable my invention to be fully understood I will describe how it can be
carried into practice by reference to the accompanying drawings, in which :-
Figure 1 is a side elevation of as much of the driving wheel and fork of a
velocipede as is necessary to illustrate my improvements which are shewn applied
thereto, part of the casing being removed to shew the interior gearing.
Figure 2 is a section on the line A B of Figure 1.
Similar letters in both the figures indicate similar parts.
a is the crank axle or pedal shaft forming the axis of the driving wheel, in which
the said axle rotates independently of the said wheel; b, b are the ball bearings
between the axle and the wheel; c is the fork; d, d are the bearings in which the
fork terminates; and e, e are the cranks carrying the pedals of the machine all the
said parts being of ordinary construction.
fis the gear-wheel which I mount upon the crank axle or pedal shaft a; and
g indicates the gear-teeth which I form on the hub or boss of the driving wheel,
such teeth constituting a gear-wheel of less diameter than the wheel f.
i,j and i, j are the two double pinions which I mount on shafts k and k¹ respec-
tively, parallel with the pedal shaft a; 1 is the casing enclosing the gearing, such
casing being fixed to the fork c by means of arms one of which is shewn at m and
which arms also receive one of the ends of the shafts k and ¹ respectively. The
parts and of the double pinions are of smaller diameter than the parts j and j
the former being adapted to gear with the wheel and the latter with the teeth or
wheel 9 on the hub h.
Figure 1 shews how the double pinions i, j and i¹, j' are placed one in advance
and one at the rear of the shaft a so that when the machine is being ridden the twist
which would tend to take place in the casing if only one double pinion was
employed will be counteracted by the pull or twist exerted upon the other double
pinion.
This arrangement of gearing will run very smoothly without any danger of the
teeth jamming.
It is to be understood that the wheels may be made with varying numbers of
teeth to suit the speed of rotation of the driving wheel relatively to the speed of
rotation of the pedal shaft.
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 :-
:-
The improved arrangement of gearing for velocipedes hereinbefore described and
illustrated in the accompanying drawings.
Dated the 21st day of July 1893.
9 21st day of July 1893.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.