Improvements relating to Bicycles, Tricycles, and other Velocipedes.
Year: 1888

page_text: Date of Application, 2nd Aug., 1888
Complete Specification Left, 28th Sept., 1888
Complete Specification Accepted, 2nd Nov., 1888
PROVISIONAL SPECIFICATION.
Improvements relating to Bicycles, Tricycles, and other
Velocipedes.
I, THOMAS WILLIAM Cox, of Dursley, in the county of Gloucester, Station
Master (Midland Railway) do hereby declare the nature of this invention to be as
follows:
--
My invention relates to bicycles, tricycles, and other velocipedes and has for its
object to provide improved means for propelling the same.
According to my said invention I fix a small toothed pinion upon the axle of the
driving wheel, and upon an arm or bracket attached to the fork or frame of the said
wheel I mount an internally toothed gear wheel of larger diameter than, and engaging
with the teeth of the pinion, so that when motion is imparted to the internally
toothed wheel it will communicate motion to the pinion and thence to the driving
wheel.
In adapting my improved driving gear to a bicycle I arrange a pinion and an
internally toothed wheel on each side of the driving wheel and I make the outer
sides of the said internally toothed wheels solid or cover them with metal plates so
that there is no liability of a rider's garments being caught by the gearing. The
treadles are also attached to the said solid sides.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements relating to. Bicycles, Tricycles, and other
Velocipedes.
I, THOMAS WILLIAM Cox, of Dursley, in the county of Gloucester, Station
Master (Midland Railway), 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, tricycles and other velocipedes and has for its
object to provide improved means for propelling the same.
According to my said invention I fix a small toothed pinion upon the axle of the
driving wheel, and upon an arm or bracket attached to the fork or frame of the said
wheel I mount an internally toothed gear wheel of larger diameter than, and engaging
with the teeth of the pinion, so that when motion is imparted to the internally
toothed wheel it will communicate motion to the pinion and thence to the driving
wheel.
In adapting my improved driving gear to a bicycle I arrange a pinion and an
internally toothed wheel on each side of the driving wheel and I make the outer
sides of the said internally toothed wheels solid, or cover them with metal plates so
that there is no liability of a rider's garment being caught by the gearing.
cranks are also attached to the said solid sides.
In the accompanying drawing,
The
Figure 1 is a side elevation of the central portion of the driving wheel of a bicycle
constructed according to my invention.
Figure 2 is a plan partly in section of the same.
Similar reference letters indicate similar parts in both the figures.
a, a are the toothed pinions which are fixed on the ends of the axle b of the driving
wheel. c, e are the arms or brackets attached to the fork or frame d, d, and e, e are
the internally toothed gear wheels which are mounted on pins f, f on the arms or
brackets C, c and engage with the teeth of the pinions a, a.
g, g are the outer sides of the gear wheels e, e which are made solid as shewn so as
to prevent the liability of a rider's garment being caught by the gearing. Or instead
of making the said sides solid I can cover them with metal plates for the same
purpose.
h, h are the cranks which are attached to the solid sides g, g of the gear
wheels e, e.
By these improvements when power is applied to the cranks h, h by the rider's feet
in the usual manner the internally toothed wheels e, e will revolve with the said
cranks and being of larger diameter than the pinions a, a will rotate the latter with
the driving wheel more than once for each rotation of the treadles instead of only once
as when the treadles are fixed on the axle of the driving wheel thereby considerably
increasing the possible speed of the machine.

page_text: When using my improvements in conjunction with a tricycle only one of the gear
wheels e and its pinion a are used as hereinbefore described, the treadle shaft being
either attached directly to the said gear wheel e or its motion conveyed by means of a
chain or the like.
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
1. In a bicycle, tricycle or other velocipede the combination with a toothed pinion
fixed upon the axle of the driving wheel, of an internally toothed gear wheel of larger
diameter than, and engaging with the said pinion, the said gear wheel being mounted
upon an arm or bracket attached to the fork or frame of the wheel, substantially as,
and for the purpose, hereinbefore described.
2. The improved bicycle hereinbefore described with reference to the accompanying
drawing.
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