Improvements in Driving Gear for Cycles and like Vehicles.
Year: 1896

page_text: Date of Application, 16th June, 1896-Accepted, 1st Aug., 1896
COMPLETE SPECIFICATION.
Improvements in Driving Gear for Cycles and like Vehicles.
I, ARTHUR HENRY EDWARDS of No. 4 Castlereagh Street Sydney in the
Colony of New South Wales, Inventor, 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 an improved driving gear for cycles and like vehicles,
and consists essentially in the use of a peculiarly constructed sprocket wheel
having internal cogs to operate the driving wheel, and connected by a chain or
band with the treadle wheel.
The object of this invention is to enable the vehicle to be driven at a greater.
speed without increasing the energy expended. But in order that this invention
may be more fully understood reference will be made to the accompanying sheet of
drawings in which;
Fig. 1. is a side view of a bicycle fitted with this improved gear.
Fig. 2. is an enlarged view of the peculiarly constructed sprocket wheel with
internal cogs, also showing the method of operating the driving wheel.
Fig. 3. is a sectional view of the peculiarly constructed sprocket wheel shewn in
Fig. 2.
Fig. 4. is an end view of Fig. 2, showing connections with driving wheel.
In all figures similar letters are used to denote similar parts.
It will be seen on reference to Fig. 2 that the wheel A, with the sprockets B, is
fitted with internal cogs C.
A small cog wheel D is so constructed as to gear with the cogs C of wheel A.
The cog wheel D is secured to the driving wheel E of the bicycle.
By the chain F which passes around the sprocket wheels G and A and operated
by the pedal. H, the driving wheel E is caused to revolve.
The axle I of wheel A is supported by the oblique bearings J which rest upon
the stay rod K.
The wheels A and D are preferably placed on the outside of the contact point
of the stays K and L, but I do not intend in all cases to so place these wheels as it
may be found by the construction of some cycles that it is preferable to place the
stays L and K on the outside.
It will be obvious that the driving wheel E, to the axle of which is fixed the
cog wheel D, will revolve at a much greater speed than the wheel A. These
wheels may be made of any suitable size, to give any required speed, and I may
also vary the size of my pedal wheel G as may be required.
Iustead of using a chain to operate this improved gear, I may use a band or
strap; in that case the wheels A and G would be constructed without the sprockets,
as for friction gear; in all other parts the construction of this improved gear
would be the same as if operated by a chain.
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
1st. An improved method of operating the driving wheel of cycles and like
vehicles consisting of, or involved in the use of a peculiarly constructed sprocket
wheel having internal cogs such as C to operate the driving wheel; substantially
as herein described and illustrated in the drawings.

page_text: 2nd. In improved gear for cycles and like vehicles the use of a friction wheel
fitted with internal coge, to operate the driving wheel, being itself operated by a
band or strap; substantially as herein described and illustrated in the drawings.
3rd. The peculiar combination and arrangement of mechanical parts, all
together fortning "An improved driving gear for cycles and like vehicles"
substantially as herein described, explained aud illustrated in the drawings.
Dated this Fourth day of May 1896.
ARTHUR HENRY EDWARDS.
Haseltine, Lake & Co.,
45 Southampton Buildings, W.C., Agents for the Applicant.