Year: 1898

page_text: I, OLIVER ZELAND, of 17, Kungsholmsgatan, Stockholm, Sweden, Engineer, do
hereby declare the nature of this invention to be as follows:-
Heretofore in velocipedes the power has usually been transmitted from the
crank axle to the driving wheel by means of chain and sprocket wheels involving
a somewhat great strain, or by means of bevel wheel gearing involving consider-
able friction in the teeth, both modes thus causing loss of power.
My invention consists in an arrangement for transmitting the power by roller
wheels which differ from bevel wheels or spur wheels therein that the teeth consist
of truncated cones, movable round their spindles and at right angles to each other,
so that the usual tooth friction is transformed into rolling friction. This
arrangement adapts itself particularly for being enclosed against wet and dirt,
while the proper speed required for the driving wheel is easily obtained.
Fixed upon the crank axle is a wheel with roller teeth which gear with the
roller teeth of a wheel fixed on another spindle at right angles thereto. This
spindle has its bearings on the framing. On the other end of it is fixed a roller
tooth wheel which gears with the rollers of a tooth wheel at right angles thereto
on the driving axle or on the driving wheel. The power is thus transmitted and
while using suitable ball bearings without involving any sliding friction as with
ordinary tooth wheels or without the strain inherent in the chain gear.
Dated this Wifth day of January 1898
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.
1, OLIVER ZELAND, of 17, Kungsholmsgatan, Stockholm, Sweden, Engineer, 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:-
Heretofore in velocipedes the power has usually been transmitted from the
crank axle to the driving axle by means of chain and sprocket wheels involving
a somewhat great strain, or by means of bevel wheel gearing involving consider-
able friction in the teeth, both modes thus causing loss of power.
My invention consists in an arrangement for transmitting the power by roller
wheels which differ from bevel wheels or spur wheels therein that the teeth consist
CD 077

page_text: of truncated cones, movable round their spindles and at right angles to each other
or thereabouts, so that the usual tooth friction is transformed into rolling friction.
This arrangement adapts itself particularly for being enclosed against wet or dirt
while the proper speed required for the driving axle is easily obtained.
Fig. 1 of the drawings is a side view of a velocipede provided with roller tooth
wheel gearing. Fig. 2 is a side view to a larger scale of the said gearing. Fig. 3
a plan partly in section. Fig. 4 is a horizontal section through a clutch device for
speed changing. Fig. 5 shows a pair of such wheels partly in section showing the
form of teeth which however depends upon the size of wheels and their relative
diameters and the angle of their spindles, and Fig. 6 shows an arrangement of
such a tooth.
Fixed upon the crank axle a is a wheel b with roller teeth which gear with the
roller teeth of a wheel d fixed on another spindle c at about right angles thereto.
This spindle c has its bearings in the tube i forming part of a gear enclosing
framing. On the other end of it is fixed a roller tooth wheel e which gears with
the rollers of a tooth wheel g at about right angles thereto on the driving axle or
on the driving wheel f. The power is thus transmitted from the crank axle a
by the spindle c, running in suitable ball bearings h, h, to the driving wheel with-
out involving any sliding friction as with ordinary tooth wheels, or without the
strain inherent in the chain gear.
In Fig. 4 the wheel 6 is shown provided with two concentrically arranged rows
of roller teeth 2 and 2 which can gear either with the wheel d or the wheel d'
which latter can be slided along the spindle c while the wheel & runs loose on the
spindle but can be clutched in with the wheel d when the latter by suitable means
is slided to the left for a higher speed. But the above clutch device may be
variously arranged.
The stud may
Fig. 5 shows the wheel k provided with the conical rollers m.
be supported at both ends as shown in the upper half of the view, or at one end
as shown in the lower half.
In Fig. 6 the roller m with its spindle is turned out of one piece.
Having now partícularly 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:
In velocipede driving gear with roller teeth consisting of truncated cones
rotatable round their axes the arrangement of having the axes of the cones in
the one system at right angles or thereabouts to those in the other, substantially
as described and shown.
Dated this Fifth day of October 1908.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.