Improvements in Driving Gear for Cycles, Motor Cars, and other Road Vehicles.
Year: 1896

page_text: Date of Application, 18th Dec., 1896
Complete Specification Left, 18th Sept., 1897-Accepted, 18th Dec., 1897
PROVISIONAL SPECIFICATION.
Improvements in Driving Gear for Cycles, Motor Cars, and other
Road Vehicles.
1, JOHN FAVETS of 103 Hatton Garden, in the City of London, Commission
Agent, do hereby declare the nature of my said invention to be as follows:-
The object of my invention is to effect improvements in toothed driving gear
suitable for use on Cycles, motor-cars, and other propelled vehicles.
According to my invention, I make use of bevel gearing, the bevel wheel of
which is elliptical in shape and meshing with a bevel pinion whose teeth follow
a path coincident with those of the elliptical bevel wheel. Both, wheel and pinion,
are mounted centrally on suitable axes, the speed in this case being one revolution
of the wheel to two of the pinion.
In order to be able to gear as one to three, the bevel wheel must be triangular
in shape and as one to four, quadrangular in shape; in all cases however the teeth
of the bevel wheels are cut on the edge at 45° as usual and the teeth of the bevel
pinions are at 45° as usual but they are not situated in a plane at right angles to
the axis. The angularity of the plane of the teeth of the pinion is arranged
according to the shape of the bevel wheel and it will thus be seen that the path of
the teeth, as viewed at right angles to their plane, will be elliptical or of an
analogous shape.
By the use of this gear the motion of either the wheel or the pinion is irregular
according to which is driven regularly. This enables me to apply the gear so
that during the time the power is being applied the movement is slower at the
driven end than when the power is passing the dead centre.
Dated 101 T
2000
GEO.
DOWNING
8 Quality Court. London W.C. Agent.
COMPLETE SPECIFICATION.
Improvements in Driving Gear for Cycles, Motor Cars, and other
Road Vehicles.
I, JOHN FAVETS, of 103 Hatton Garden, in the City of London, Commission
Agent, do hereby declaro 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:
My invention relates to improvements in driving gear for cycles, motor cars,
and other self-propelled vehicles.
According to this invention I make use of bevel gearing, the bevel wheel of
which is elliptical in shape and meshes with a bevel pinion, whose teeth follow a
path coincident with those of the elliptical bevel wheel. Both wheel and pinion
are mounted centrally on suitable axes, the speed in this case being one revolution
of the wheel to two of the pinion. In order to be able to gear as one to three, the

page_text: bevel wheel must be triangular in shape, and as one to four, quadrangular in
shape.
In the accompanying, drawing,"
Figure 1 represents a side elevation of a bicycle provided with a driving gear
constructed according to my said invention.
Figure 2 is a plan showing a bevel gear which consists of an elliptical bevel
wheel engaging with the bevel pinion.
Figure 3 shows a front elevation of the elliptical bevel wheel separately.
Figure 4 is a plan showing a bevel gear which consists of a triangular hevel
wheel engaging with the bevel pinion.
Figure 5 shows a front elevation of the triangular bevel wheel separately..
Figure 6 is a plan showing a bevel gear which consists of a quadrangular bevel
wheel engaging with the bevel pinion.
Figure 7 represents a front elevation of the quadrangular bevel wheel separately.
As shown in Figure 1, my improved driving gear comprises a bevel pinion a
mounted centrally on the crank shaft and meshing with a pinion 6 mounted
centrally upon one end of a spindle c, the other end of which carries a bevel
wheel & fitted to engage with a bevel pinion e which is fixed upon the axle of
the driving wheel, the aforesaid spindle c being preferably held in ball bearings
secured to suitable points of the cycle frame.
The construction of the bevel wheels and pinions which I employ in my driving
gear is clearly shown in Figures 2 to 8, from which it will be seen that in all
cases the teeth of such wheels aala and pinions bb in the several gears are
cut on the edge at an angle of 45 degrees as usual, but that those of the pinions
are not situated in a plane at right angles to the axis. The angularity of the
plane of the teeth of the pinions is arranged according to the shape of the bevel
wheel, and it will thus be seen that the path of the teeth as viewed at right angles
to their plane will be elliptical or of an analogous shape..
If desired I may also arrange an elliptical, triangular or quadrangular bevel
wheel at the rear end of the spindle c and adapt it to mesh with a corresponding
bevel pinion fixed upon the axle of the driving wheel.
By the use of this gear the motion of either the wheel on the pinion is irregular
according to which is driven regularly. This enables me to apply the gear so
that during the time the power is being applied the movement will be slower at
the driven end than when the power is passing the dead centre.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
First. In a driving gear for cycles, motor cars and other road vehicles an
elliptical bevel wheel a and a pinion 6 both mounted centrally, the teeth of the
said pinion being situated in a plane which is not at right angles to the axis,
substantially as and for the purpose hereinbefore set forth with reference to the
accompanying drawing.
Second. In driving gear for cycles, motor cars and other road vehicles, a
triangular bevel wheel a' and a pinion b, substantially as and for the purpose
hereinbefore set forth with reference to the accompanying drawing.
Third. In driving gear for cycles motor cars and other road vehicles a quad-
rangular bevel wheel a and a pinion, substantially as and for the purpose
hereinbefore set forth with reference to the accompanying drawing.
Dated this 18th day of September 1897