Year: 1898

page_text: Improved t
I, HERMANN GANSWINDT, a subject of the Emperor of Germany and resident of
Mariendorfer Weg, Schoeneberg, near Berlin, in the Empire of Germany, Manu-
facturer, do hereby declare the nature of my said invention to be as follows: --
This invention relates to a chain adjusting device for cycles, according to
which an alteration or variation of the tension of the chain is effected by a
displacement of the rear or driving wheel axle. This device is constructed in
such a manner that after releasing the nuts, the rear wheel axle is always in
a parallel position to the pedal crank axle. This is effected by the ends of the
fork, serving as bearings of the rear wheel axle, not being rigidly connected
with the lower fork of the frame as heretofore but adjustably mounted, whilst
the head-end of the rear wheel fork is hinged to the frame of the cycle. Each
fork end is provided with a bore or hollow through which a screw pin or lug of
the lower fork is passed. The ends of the fork carrying the rear wheel axle are
locked after adjustment of these pins by nuts and lock nuts.
This arrangement or construction enables an adjustment of the tension of the
chain in the most simple and convenient manner, whilst it is not necessary to
release the axle bearing. Also by this arrangement, the direct transmission of
the weight of the rider on to the rear wheel axle is not affected or influenced in
any way by the alteration or variation of the adjustment, whereby the stability
of the cycle is very much increased..
The rear wheel fork is hinged at its head and to a diagonal tube by a pin or the
like. On each fork tube is secured at the lower end a pin or tube whose end
forms an attachment or lug, which carries in the opening the bearing for the
rear wheel axle and is provided with a bore or hollow.
The lower fork of the frame carries at each end straight or curved screw pin
which is passed through the hollow or bore and is secured by nuts and check
or lock nuts. The chain or sprocket wheel is rigidly mounted on the rotating
rear wheel axle in the usual manner. For the purpose of varying or altering
the tension of the chain, the nuts are released on both sides and according to
requirement adjusted at equal distances from the rear wheel fork, whereupon the
fork ends with the driving wheel axle may be locked on pins by tightening the
other two nuts.
P L 1 11
M
1
D
11000

page_text: I, HERMANN GANSWINDT, Subject of the Emperor of Germany and resident of
Mariendorfer Weg, Schoeneberg, near Berlin, in the Empire of Germany, Manu-
facturer, do hereby declare the nature of my said invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
This invention relates to a chain adjusting device for cycles, according to
which an alteration or variation of the tension of the chain is effected by a
displacement of the rear or driving wheel axle. This device is constructed in
such a manner that after releasing the nuts, the rear wheel axle is always in
a parallel position to the pedal crank axle. This is effected by the ends of the
fork, serving as bearings of the rear wheel axle, not being rigidly connected
with the lower fork of the frame as heretofore but adjustably mounted, whilst
the head-end of the rear wheel fork is hinged to the frame of the cycle. Each
fork end is provided with a bore or hollow through which a screw pin or lug of
the lower fork is passed. The ends of the fork carrying the rear wheel axle are
locked after adjustment of these pins by nuts and lock nuts.
This arrangement or construction enables an adjustment of the tension of
the chain in the most simple and convenient manner, whilst it is not necessary
to release the axle bearing. Also by this arrangement, the direct transmission
of the weight of the rider on to the rear wheel axle is not affected or influenced
in any way by the alteration or variation of the adjustment, whereby the stability
of the cycle is very much increased.
In the accompanying drawing the subject matter of the invention is shown
by way of example.
Fig. 1 is a side elevation and
Fig. 2 a back view of a part of the cycle frame and rear driving wheel.
Figs. 3 and 4 are constructive details.
The rear wheel fork a is hinged at its head end to the diagonal tube 6 by a
pin c or the like. On each fork tube is secured at the lower end a pin or tube d
whose end forms an attachment or lug e which carries in the opening the bearing
for the rear wheel axle g and is provided with a bore or hollow h.
The lower fork i of the frame carries at each end a straight or curved screw
pin which is passed through the hollow or bore h and is secured by nuts and
check or lock nuts respectively. The chain or sprocket wheel is rigidly
mounted on the rotating rear wheel axle g in the usual manner.
For the purpose
of varying or altering the tension of the chain, the nuts k or are released
on both sides and according to requirement adjusted at equal distances from
the rear wheel fork, whereupon the fork ends e with the driving wheel axle may be
locked on the pins ; by tightening the other two nuts.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
Improved chain adjusting device for cycles consisting in mounting the rear

page_text: wheel axle g, which carries the sprocket or chain wheel 7, in the hinged rear wheel
fork a which may be adjusted on the pins j of the lower fork of the frame
substantially as described and shown in the drawing.
E. P. ALEXANDER & SON,
Chartered Patent Agents,
19, Southampton Buildings, Chancery Lane, London, W.C.,
Filing Agents.