IMPROVEMENTS IN THE DRIVING MECHANISM OF BICYCLES
Year: 1884

page_text: We THOMAS TAYLOR Engineer, No 1 Court 4 House Leigh Street Hill Field's,
Coventry CHARLES BUCKLEY Gasfitter No 32 King William Street Hill Fields,
Coventry FREDERICK BOYLING Coach Painter No 6 Canterbury Street Hill
Fields Coventry-Warwickshire do hereby declare the nature of the invention for
IMPROVEMENTS IN THE DRIVING MECHANISM OF BICYCLES" to be as follows:-
In carrying out the above mentioned Invention we apply to each end of the axle
otherwise spindel of bicycle wheel a small cog wheel or Pinion. We also apply to
the axle otherwise spindel of the driving cranks (which are seperate axles.to
that of the Bicycle wheel) a larger cog wheel to cach side of bicycle with teeth
operating internaly upon the teeth of the smaller Pinion
These cog wheels are applied to bottom ends of front forks of bicycle by means
of brackets which form the bearings for the bicycle wheel axle and also for driving
cranks and aranged at such an angle as to give the driving cranks. the greatest
power on the downward stroke and forms.a leaver of the first kind for driving
power and the pinions being fixed to Bicycle wheel axle and driven by larger
internal cogs increases the speed.
But that the Invention may be better understood I will by the accompaning
drawings proceed to describe means persued by us in carrying the same into effect
-Description of Drawings Figure 1 Shows a full size side view of Gear with
part of Bicycle wheel hub and front fork attached. Figure 2 Shows a front view
with part of large cog removed and shows .centers and position of most power-
In each of the figures the same letters are employed to indicate corresponding
parts A represents the larger brackets which is fixed to the front fork of bicycle
and forms a bearing for bicycle wheel axle G-B is the smaller brackets and is fixed
to brackets A,by means of screws and forms, a bearing for.driving eranks axles.H.
C is the caps or half bearings for convenience in putting together and also for
applying balls or rowlers as shown in front view of brackets-D is the larger
internal cog Wheels and is fixed to driving cranks axles H. .E.is the small cog or
pinion fixed to bicycle wheel axle and, is driven by cog Wheel D-F is part of
bicycle wheel hub-G is hub Axle H is driving cranks axles I is bearings for
axles G-J is bearings for Axles H. K is the driving crank-L is part of bicycle
front fork-M is adjustment screws to adjust cogs in gear-N is the joint of brackets
to bicycle front forks..

page_text: Having thus described our invention and means which we have adapted in
carrying the same into effect we would have it understood that what we claim is
the mode of application and gaining power by placeing the axles otherwise spindels
centers and cog wheels at the angle described or a similar angle the centers
of pinions being below centers of larger internal cog wheels thus rendering it
a leaver of the first kind for driving power the fulcram being the axle of large cog
wheels and driving cranks.
Dated this fifteenth day of March 1901
We, THOMAS TAYLOR, Engineer, 1, Court 4 House, Leigh Street, Hill Fields,
Coventry, Warwickshire, CHARLES BUCKLEY, Gas Fitter 32, King William Street,
Hill Fields, Coventry, and FREDERICK BOYLING, 6, Canterbury Street, Hill Fields,
Coventry, Coach Painter do hereby declare the nature of our invention for
"IMPROVEMENTS IN THE DRIVING MECHANISM OF. BICYCLES" and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement and accompanying sheet of drawings:
-
Our Invention relates to Improvements in the driving mechanism of bicycles and
has for its object to provide a simple arrangement of mechanism by means of
which the driving wheel will revolve faster than the pedals. Our Invention is
-specially-applicable-to-safety-bicycles. We will at once refer to the accompanying
drawing and describe how our said Invention may be performed. The same letters
of reference on the drawing indicate corresponding parts in all the Figures.
Figure 1 represents in part front section, Figure 2 in part side section and
Figure 3 in part sectional plan our Improved driving mechanism applied to the
driving wheel of a bicycle. We apply the mechanism to both sides of the driving
wheel; one side is shewn broken off in the drawing. Figures 4 and 5 shew details
of the same and Figure 6 shews a bicycle with an arrangement of pedal levers for
working our Improved mechanism; but the said pedal levers form no part of this
Invention.
A is the hub of the driving wheel a¹ fixed on the spindle B which revolves in
bearings in the fork C and projects through them at each side. On each of the
projecting ends of the spindle B we fix a small spur pinion D. Gearing into each
of, and larger in diameter than, the said spur pinions D we provide an internally
spur toothed wheel E which is attached to or formed with a short spindle F which
revolves in an external bearing G'attached to or formed with the fork C, as for
instance, as shewn in detail in Figure 4 where the side pieces care formed with
the fork C to which is secured by the screws g2 the plate gl having the bearing G.
To the outer ends of the said short spindles F we fix the cranks H.
..

page_text: We prefer to arrange the centres of the said spindles F above that of the driving
wheel as we find the mechanism works better when so arranged.
It will be seen that the speed of revolution of the driving wheel a¹ is faster
than that of the pedals in the same proportion as, the wheel E is larger than the
pinion D. With our Improved gearing any suitable arrangement of pedal levers
inay be used, such for instance as shown in Figure 6, where the fork C is extended
at I to carry the pedal levers J which are connected to the cranks H by the
rods K.
We wish it to be understood that we do not limit ourselves to the precise details
as herein described and 'illustrated as the same may be varied without departing
from the nature of our Invention.
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 :
The Improvements in the driving mechanism of bicycles hereinbefore described
with reference to the accompanying drawing, that is to say, the pinion D attached
to the driving wheel axle in combination with the internally spur toothed wheel E
attached to the crank axle and carried by one external bearing G all constructed
and arranged to operate substantially as and for the purpose hereinbefore described
and illustrated.