Improvements in the Driving Gear of Bicycles and the like.
Year: 1898

page_text: Date of Application, 17th Aug., 1898-Accepted, 28th Jan., 1899
COMPLETE SPECIFICATION.
Improvements in the Driving Gear of Bicycles and the like.
I, CHRISTIAN KLIFFMÜLLER, Works Manager, of 2B, Palmeienstrasse, Durlach,
Baden, in the Empire of Germany, 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:
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This invention has for its object to provide a chainless driving gear for cycles.
and the like the special feature of which is that as distinguished from all similar
gears, it has neither tooth wheels nor ratchet wheels.
In the accompanying drawing:-
Fig. 1 is a plan and
Fig. 2 a side view of the bicycle gear.
On both sides of the hind-wheel hub 1 are two catch or clutch contrivances
which consist of sockets or bushings 2, in which the binding cheeks or blocks 4
are movable around pin bolts 3, The rear part of the lower edge of each of the
cheeks or blocks as shown in Fig. 2 is cut away at a slight angle so as to slide
on the catch discs 12 when the sockets are operated by the connecting rods 6 in
the backwards direction, but when the movable sockets or bushings 2 are moved
forwards, the cheeks or blocks are caused to wedge against and couple the catch
discs by friction and set the same in motion together with the hind wheel to
which they are fixed. The movable sockets or bushings are actuated by means
of the connecting rods 6 pivotted at one end on the pin 5 and at the other end
to the bell crank lever 7 that is pivoted on the frame of the bicycle. One
of the bell crank levers is arranged on each side, and the two crank levers which
carry the pedals 8 on their free ends are coupled by a cord 11 which runs on a
roller 10 mounted at one end of a connecting arm fixed to the frame by a sleeve 9.
The pedals are thus compelled to oscillate in opposite directions at the same time,
so that the one pedal is moving upwards whilst the other is moving downwards.
The special advantages of this invention consist mainly in the easy and noise-
less motion of the vehicle consequent upon the omission of all tooth wheels,
ratchet wheels and the like from the driving gear.
The scope of the invention is not in any way limited by the choice of the
material employed in construction or by any constructional alterations.
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. A chainless driving gear for bicycles and the like the distinguishing feature
of which is that by the action of two bell crank levers 7 so connected together
by a cord that they are compelled to oscillate simultaneously, and with the aid
of a connecting rod 6 which engages with a casing 2 carrying a cheek or block
arrangement 4, and with the assistance of a catch disc seated on the hub of the
hind wheel, the hind wheel is set in rotation through the reciprocating motion of
ГД

page_text: the connecting rod 6 and of the bell crank levers 7 substantially in the manner
described.
2. The improved driving gear for bicycles and the like substantially as described
with reference to the drawings.
Dated thi. 17th
At 1000
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WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.