Improvements in Driving Gear for Cycles and other Vehicles.
Year: 1898

page_text: Date of Application, 23rd Sept., 1898-Accepted, 26th Nov., 1898
COMPLETE SPECIFICATION.
Improvements in Driving Gear for Cycles and other Vehicles.
I, HEINRICH METZNER, of 72, Holzmarkt Strasse, Berlin, Merchant, 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 :-
My invention relates to improvements in driving gear for cycles and other
vehicles and the object is to increase the velocity with a comparatively small addition
of power over and above that required by the usual mode of driving. The
application of my invention will prove particularly advantageous in connection with
cycles for tourists and for transport.
In carrying my invention into effect I proceed in or in about the following manner
making reference to the accompanying drawings of which Fig. 1 is a part sectional
side view. Fig. 2 a section through Z, Z, Fig. 1 and Fig. 3 a section through
I, II of Fig. 2. I provide an internally toothed driving wheel a, the outer face being
plain or perforated and the inner face being recessed to receive the three
pinions bbb, attached to the three larger pinions c c c. These pinions are
toothed, bbb to gear with the internal teeth of a and c c c to gear with the
teeth of a rim to be presently referred to. The pinions b b b and c c c are free to
run on bolts S which pass through them and also through the slotted ends of the
arms or spider K, and balls and ball races may be provided to facilitate the rotation
of the pinions b b b and c c c. The peripheries of c c c gear into the internal teeth
of the rim D which surrounds the pinions c c c and carries on its outer edge
sprockets for engaging with the links of the driving chain. The above described
combination is fixed to the cycle, the part K being threaded on, and the wheel a
attached to the axle A. The following example will show the increase of power
which may be obtained by the use of my improved gear. Assuming the wheel a
to have 100 teeth, b 25 teeth, c 56 teeth and D 112 teeth, then one revolution of
the axle of the cycle wheel will give two revolutions to the rim D and thus cause
the speed of the vehicle to be twice that obtainable by the use of the ordinary gear.
The diameter of and the number of teeth in the wheels and pinions of the gear
may be varied according to circumstances and to the required speed of the vehicle,
and rollers may be substituted for one or more of the pinions b, c.
I do not confine myself to the precise disposition, shapes or relative proportions
of the various parts as any or all of them may be considerably varied without
departing from the essential features of the invention.
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
1. An improved driving gear for cycles and other vehicles and consisting essen-
tially of an internally toothed wheel a attached to the crank axle, the said wheel
having gearing with its teeth toothed pinions b attached to other toothed pinions c
of larger diameter and rotatable round bolts passing through them and the slotted
ГД

page_text: outer ends of arms threaded on the crank axle, the said pinions c gearing with an
internally toothed rim surrounding them, the whole substantially as described in the
above specification and exemplified in the accompanying drawings.
2. In a driving gear such as is the subject matter of the above. Claim 1, the
driving wheel a fixed on the crank axle and having a recessed side and internal
teeth for rotating the pinions 6 c, the whole substantially as described in the above
specification and exemplified in the accompanying drawings.
'
3. In a driving gear such as is the subject matter of the above Claim 1 the
rim D having internal teeth gearing with pinions c and sprockets for working the
driving chain, the whole substantially as described in the above specification and
exemplified in the accompanying drawings.
4. In a driving gear such as is the subject matter of the above Claim 1 the
combination of the pinions c and b rotatable on the bolt axles S the former gearing
with the internally toothed rin D and the latter with the internal teeth of the
driving wheel a, substantially as described in the above specification and exemplified
in the accompanying drawings.
5. In a driving gear such as is the subject matter of the above Claim 1, the
substitution of rollers for one or more of the pinions 6 c, substantially as described
in the above specification.
Dated this Olot day of Sentember 1808