Improvements in Velocipede Driving Mechanism.
Year: 1896

page_text: Date of Application, 25th July, 1896
Complete Specification Left, 28th Oct., 1896-Accepted, 3rd July, 1897
Improvements in Velocipede Driving Mechanism.
CHARLES PARDOE 42 Vidal Road Acre Lane Brixton Builder and GEORGE DALLISON
12 Comrie Road Acre Lane Brixton Carpenter and Joiner hoth in the county of Surrey
do hereby declare the nature of this invention to be as follows:-
This invention relates to rear driving of Velocipedes similar to our application for
letters Patent No 10347 dated May 14th '96 we enclose several pinion wheels
between two plates which form the case and an internal toothed wheel which engages
with the pinions thus giving motion to the centre pinion.
The exterior of the internal Wheel is provided with teeth to engage with the chain.
CHARLES PARDOE.
GEORGE DALLISON.
Improvements in Velocipede Driving Mechanism.
We CHARLES PARDOE of 42 Vidal Road, Builder, and GEORGE DALLISON of 12
Comrie Road, Carpenter and Joiner, both of Brixton iu the County of Surrey do
bereby 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:-
This invention relates to gear for rear driving velocipedes being an improvement
on Letters Patent granted to us No. 10347 Dated May 14th 1896.
Our improvement being in this Application that the gear is affixed to the hub of
the rear driving wheel in place of having two sets of the gear as in the above
mentioned Letters Patent where the gear was affixed to the bottom bracket of the
chain wheel and working direct from the pedal.
We enclose several pinion wheels between two plates which form the case and an
internal toothed wheel on the collar of which are sprockets to engage with the
chain.
The internal wheel gears with the pinions each of which is geared to a central
pinion by the intermediate pinions
The casing is formed by two rabbetted plates which remain stationary and are kept
in position by spindles which form the axes of the pinion wheels.
Ball bearings are used where applicable to minimize friction.
We will now proceed to describe how our said invention can be carried out by
reference to the accompanying drawings in which
Figure I is a plan of our improved gear.
Figure II is a section of Figure I shewing the edges of the pinion wheels and the
rabbetted plates which form part of the gear.
Figure III is one of the plates with countersunk holes for receiving the bearings.

page_text: Figure IV is a plan of one of the rabbetted plates shewing the holes and the
bearings in position.
Figure V shews the gear complete and attached to the rear forks of a velocipede.
Similar letters represent similar parts throughout the drawings.
In Figure I it will be seen that when the chain engages with the teeth on the
exterior of the internal wheel A it revolves and gives motion to the pinions B, B, B,
which gear with the central pinion C (which is keyed to the spindle) by means of the
intermediate pinions B',B1,B¹.
In Figure II the pinions B, B and C and the internal wheel A are shewn in section
and the casing D which encloses them.
Figure III is a section of one of the rabbetted plates D with the bearings in the
grooves.
Figure IV is a plan of one of the plates D shewing also the rabbett E.
Figure V is a plan of the whole shewing the sprockets of the internal toothed
wheel A and the plate D.
In Figures I, II and V it will be seen that motion starts from the extreme periphery
of the internal toothed wheel A.
In Figure II it is shewn that the internal toothed wheel A is provided with a
flange on each side which runs on bearings on the rabbetts E of the plates on
casings D.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is
I. The driving gear for velocipedes consisting of the internal toothed wheel A in
combination with the other pinion wheels B, B, B, the intermediate pinions B1, B¹, B¹,
and the central pinion C.
II. The rabbetted plates D which form the casing of our improved gear.
III. The manufacture and use of our improved gear substantially as and for the
purpose described and illustrated in the specification and drawings.
Dated this 28th day of October 1896.
GEORGE DALLISON.
CHARLES PARDOE.