Improvements in Toothed Gearing.
Year: 1896

page_text: Date of Application, 14th May, 1896
Complete Specification Left, 10th July, 1896-Accepted, 15th Aug., 1896
GEORGE DALLISON of 12 Comrie Road Brixton Carpenter and Joiner and
CHARLES PARDOE of 42 Vidal Road Brixton Builder both in County of Surrey
do hereby declare the nature of this invention to be as follows:-
This invention relates to a new or improved gear for velocipedes or other
purposes.
We enclose several pinion wheels between two plates which form the case and
an internal toothed wheel with treadle attached which imparts motion to the whole.
The internal wheel gears with the pinions each of which is geared to a central
pinion by the intermediate pinions.
GEORGE DALLISON.
CHAS. PARDOE.
TION.
Improvements in Toothed Gearing.
We GEORGE DALLISON of 12 Comrie Road, Carpenter and Joiner and
CHARLES PARDOE of 42 Vidal Road, Builder, both of Brixton in the County of
Surrey 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 :-
This invention relates to a new or improved gear for velocipedes or for any
machinery where a high rate of speed with a small amount of power is required.
We enclose several pinion wheels between two plates which form the case and
an internal toothed wheel with treadle attached which imparts motion to the
whole.
The internal wheel gears with the pinions each of which is geared to a central
pinion by the intermediate pinions.
A casing is formed by two rabbetted plates which remain stationary and are
kept in position by bolts which form the axes of the pinion wheels.
Bearings of any suitable kind can be employed (preferably balls) to minimize
the friction.
We will now proceed to describe how the said invention can be carried into effect
by reference to the accompanying drawings in which
Fig. I is a plan of our improved toothed gearing.
Fig. II is a section of Fig. I shewing the edges of the pinion wheels and the
rabbetted plates which form part of the gear.
Fig. II is a front view of the gear (partly in section) shewing the axle of the
chain wheel passing through the centre pinion of the gear to which it is affixed.
Fig. 1V is a plan of one of the rabbetted plates shewing the holes for the spindles.
which serve as bolts.

page_text: Fig. V is a section of the rabbetted plate shewing the spindle holes countersunk.
Similar letters represent similar or corresponding parts throughout the
drawings.
In the arrangement shewn in Fig. I it will be seen that when motion is imparted
to the treadle the internal toothed wheel A revolves and imparts motion to two
pinion wheels B. B. which gear with the central pinion E. by means of the
intermediate piuions B B B₁ B¹.
In Fig. 11 the pinion wheels B. B. and B B B B¹ and the centre pinion E are
shewn in section and the casing C which encloses them.
In Figs. I. II. III. it will be seen that the motion starts from the extreme
periphery of the internal toothed wheel A.
In Figs. II and III it will be seen that the internal toothed wheel A is provided
on each side with a flange which runs on bearings on the rabbetts D of the plates
or casings C.
Fig. II shews the whole gearing as it appears in actual practice with the
rabbetted plates on and in position.
Figs. IV and V shew the plate C with the rabbetted edges D.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what
we claim is-
I. The driving gear for velocipedes or other purposes consisting of the internal
toothed wheel A in combination with the pinion wheels B. B., the intermediate
pinions B B B B' and central pinion E.
II. The rabbetted plates C which form the casing of our improved gear.
III. The use and manufacture of our improved gear substantially as and for
the purposes described and illustrated in the specification and drawings.
Dated this 10th day of July 1896.
GEORGE DALLISON.
CHARLES PARDOE.