Year: 1897

page_text: We, EUGENE WORMS and JULES BING, both Manufacturers, of 56, Rue de la
Victoire, Paris, France, do hereby declare the nature of this invention to be as
follows:-
The object of the present invention is a chainless driving gear for cycles and
other vehicles in which the motion of the cranks is transmitted to the driving-
wheel by means of conical gearings.
This new system of driving-gear offers the following advantages:
It does away with the inconveniences inherent in the use of a chain and allows
the driving gear to be fixed on the middle of the crank axle and not in an oblique
position; moreover, the organs of transmission are completely encased and kept
free from mud and dust and the pedals owing to their form and their special
working arrangement, are made in one piece, which lessens the risks of accident.
This system of driving gear is composed of a conical wheel wedged upon the
middle of the crank axle and gearing with a conical pinion fixed and held by a
ring upon the fore-end of an axle whose back extremity is fixed to the interior
of a tube provided at its back and with another similar axle, upon which a conical
gearing working conical wheel fixed to the hub of the driving wheel is fixed.
The tube forming the transmission axle turns inside another tube forming
one of the branches of the lower back fork of the machine and having its fore-
end fitted in a swelling of the bracket, and its back extremity in an envelope fixed
to the frame of the machine by means of screws or bolts. These envelopes are
made of iron steel or any other metal and are provided with doors fixed with
screws and shutting the openings which allow the easy introduction of the pinions
fixed at the extremities of the tube into their respective envelopes; moreover,
the front envelope is provided with a ball case in which the cylindrical and conical
parts of an axle end turn this axle end being provided with a tail adjusted in the
axis of the tube. The axis of the back extremity of the tube is also provided
with an axle-end turning like the preceding one in a movable ball case formed
by the front face of a disc screwed in the door of the back envelope and whose
circumference is provided with notches in which a screw is introduced to prevent
the loosening of the disc.
The lid of the back envelope being held by clamps connected with a branch
of the back fork by means of bolts it is easy to regulate the ball bearings by
screwing or unscrewing the notched disc which is afterwards held in the desired
position by the screw.
The working of this system is very simple, the wheel fixed on the crank axle
works the front pinion and this through the intermediary of the tube, transmits

page_text: its movement to the back pinion which in its turn works the gearing fixed to
the hub of the wheel and owing to the gearing arrangement gives this wheel a
rotary movement in the same direction as that of the pedals.
'י
0041
1
L. DUVINAGE,
Agent for Applicants.
Improved Chainless Driving Gear for Cycles and other Vehicles.
We, EUGÈNE WORMS and JULES BING, of 56, Rue de la Victoire, Paris,
France, both Manufacturers, 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:-
The present invention concerns a driving-system without chain, applicable to
cycles and other vehicles of the same principle, and with which the motion of
the pedals is transmitted to the driving-wheel through the intermediary of conical
gearings and axles.
In the annexed drawing:
Fig. 1 is a view in elevation of a velocipede provided with our new system of
driving gear.
Fig. 2 is a detailed view in elevation showing a longitudinal section of the
driving mechanism.
Fig. 3 is a plan view of the back part of the machine with the driving
mechanism and
Fig. 4 is a front view of the back regulating-case or end cover.
The bicycle provided with this system of transmission of motion, has the general
aspect of an ordinary bicycle, but the tubes L M of the frame, instead of being
joined at their lower extremity by the usual bracket, are fitted into a casing A
made in two parts connected by screws or bolts one of which parts, the lower
one, can easily be removed; moreover the branch E of the back fork has, at its
rear part another casing J into which a tube H is fitted which forms one of the
branches of the lower fork of the machine, the other extremity of which pene-
trates into the interior of a swelling 1)¹ of the casing A which, as also the casing J,
is made of iron, steel or other metal.
The transmission gear is entirely enclosed in the casings A, J and in the
tube H and is composed of a bevel wheel B wedged upon the middle of the crank-
axle C.
The wheel B gears with a bevel pinion D fixed and held by a ring V upon
the fore-extremity of an axle t widened at its middle part and whose back-
extremity is fixed in the interior of a tube E serving as transmission axle.
The tube E passes through the tube H along its whole length and carries,
fixed in the interior of its back end, an axle t similar to the front one and upon
which a bevel pinion F is fixed, held by a threaded ring v and which works
another pinion G fixed upon the hub of the driving-wheel R.
The front and back axles of the tube E are provided with pivots s provided
respectively with conical parts f & g turning on the balls h fitted in the fore-
part, in a case formed by the swelling D¹ of the casing A and in the back part
in a case d formed by the interior part of a disk which is screwed into the
opening of an end cover J¹ of the casing J.
The circumference of the disk 7 is provided with notches o (Fig. 4) into one
of which a screw p is fitted screwing into the end cover of the casing J,
the

page_text: object of which is to prevent the loosening of the disk 7 (see Fig. 4). The casing J
is provided with lugs a, b, between which are clamped flanges ; formed on the
end cover J. To secure the casing J in position the lower end of the rear fork e
is also clamped, by means of a bolt e¹ between the lugs a as shown by Figure 2.
When the cyclist makes use of his machine he first regulates the ball bearing
of the transmission axle E by screwing the disk into the opening c more or
less, and keeping the disk in the desired position by means of the screw p.
The working of this driving system is very simple; the wheel B, worked by
the crank-axle, turns the pinion D which, through the axle, E transmits its move-
ment to the pinion F and this latter in its turn works the gearing G which is
fixed upon the hub of the driving wheel and owing to the arrangement of the
gearings, transmits a rotary movement to this wheel in the same direction as
that of the pedals.
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:-
In a driving system without chain, for cycles and other vehicles the combina-
tion of a conical wheel fixed upon the middle of the crank-axle; two intermediary
conical pinions transmitting the motion and fixed upon two axles adapted to the
ends of a tube and to the ends of which two pivots, having conical parts (f g),
are suitably secured; two ball bearings one of which, that of the front pivot, has
a fixed case, that of the back pivot having a movable case and being regulated
ad libitum; a conical wheel fixed upon the hub of the driving wheel; a front-
casing in two parts provided with a boss and a ball case; a tube connected with
the boss of the front casing and traversed by the transmission tube or axle; a
back casing shut by a door into which the case of the back axle-end is screwed,
the said case forming the forepart of a disk whose periphery is provided with
notches into one of which a screw is fitted, screwing into the back covering, the
object of which is to prevent the rotation of the case, substantially as and for
the purpose specified.
Dated this 29th day of July 1898.