Improvements in and relating to Driving Gear for Cycles and the like.
Year: 1898

page_text: Date of Application, 16th Mar., 1898-Accepted, 16th July, 1898
COMPLETE SPECIFICATION.
Improvements in and relating to Driving Gear for Cycles and the like.
I, CARL GUSTAV IRENAUS SCHULTZ, of 8, Pelzerstrasse, Hamburg, in the Empire
of Germany, Merchant, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to an improved driving gear for cycles in which the
power is transmitted from the pedal axle to the rear or driving wheel by a
horizontal shaft and bevel wheels of improved construction.
The invention consists of a new construction of the bevel wheels placed upon the
side shaft and so arranged that an elastic medium is provided between the teeth
of the wheels and their containing flanges which prevents shock or noise when
power is being transmitted. The subject of the invention is a further improve-
ment on application for Letters Patent No. 5291 of 1898 filed by the present
applicant.
The mode of carrying the invention into effect is illustrated in the accompanying
sheets of drawings as follows:-
Figures 1 and 2 are respectively elevation and plan of the improved driving gear
applied to a bicycle.
Figures 3 and 4 are respectively side elevation partly in section and end elevation
of the improved noiseless transmission wheels.
Figures 1 and 2 clearly show the arrangement of the gear in position.
The bevel wheels and are attached respectively to the pedal axle K and
the rear wheel hub and the horizontal shaft a carries upon its opposing ends the
elastic transmission wheels b and c intermeshing with bevel wheels. The shaft a
rotates in bearings S and S¹ attached to one of the lower members of the cycle
frame and the transmission of the power to the rear or driving wheel is in the
manner usual with positive gear.
The elastic bevel wheels b and c are constructed as follows:-A sleeve mis
keyed to the shaft a by a key o and between one end of this sleeve m and an
adjusting collar there is secured the inner flange i of the wheel. The outer
flange his pulled up against the other end of the sleeve m by set screws n and
suitable holes are tapped in the sleeve to receive these screws.
The flanges h and are drilled with conical holes at 7 and receive therein conical
linings of hard rubber or similar suitable material and within these linings the
opposing ends f¹ and f of the rollers or teeth f of the wheels b and c rest." The
removal of worn or fractured rollers f is easily effected by unscrewing the set
pins n and removing the flange h.
When a transmission gear is in use constructed as hereinbefore described with
the elastic bevel wheels b and c the advantages are very obvious. The jar usually
set up owing to the back lash of teeth of the ordinary construction is practically
absorbed and no unpleasant vibration takes place while further the noise is
entirely absent. This is effected by the conical layer of elastic material inter-
posed in the manner hereinbefore described.
It is evident that conical metal bushes could be interposed between the ends f¹ ƒª

page_text: and the rubber liners to facilitate the rotation of the rollers f and all without
departing from the subject of the present invention.
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:-
(1). In cycles or like vehicles in which the motion is transmitted through a shaft
by suitable bevel gearing arranging pairs of bevel gear wheels on either oud of the
shaft and providing one wheel of each pair with roller teeth whose ends bed in
conical sleeves of elastic material as a means of absorbing vibration and rendering
the power transmission noiseless all substantially as hereinbefore described.
(2). The improved noiseless transmission gearing for cycles substantially as
hereinbefore described with reference to Figures 3 and 4 of the accompanying
drawings.
101
•
4000