Improvements in the Frames of Velocipedes.
Year: 1898

page_text: Date of Application, 4th Feb., 1898-Accepted, 9th Apr.,
1898
COMPLETE SPECIFICATION.
Improvements in the Frames of Velocipedes.
We, FRANZ GRUNDNER and OTTO LEMISCH, both Manufacturers, of Klagenfurth,
Austria, 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: -
The present invention refers to cycles in bamboo or any wood whatever, in com-
pressed paper or any vegetable matter having a sufficient solidity and, more
especially to the mode of fitting their parts together by means of metallic socket-
joints.
This mode of fixing offers numerous advantages it is very simple and affords
a great solidity to the frame, the machine can be quickly and cheaply put together
and the broken stems easily changed.
In the annexed drawing a form of construction of this socket and its application
to a bicycle frame is shown as an example.
Fig. 1 represents a bicycle frame in bamboo, fitted together with our system of
sockets.
Fig. 2 is a side view of a socket.
.
Fig 3 is a plane view of the same socket &
Fig. 4 is a transverse section of the socket on line x-y of Figs. 2-3.
The part 6 shown in Figs. 1, 2 and 3 is one of the top sockets of the back fork
of the machine.
This socket is composed of a steel tube f stopped at one of its ends and extended
at this same end by a flat part g in which a hole m is bored.
The other end of the tube f is split longitudinally and is provided, on each side
of this slit, with an ear h stamped in the tube, from the inside to the outside to
form a projection on its periphery. Each of these ears h has its lateral side
bored for the introduction of a pin i, which passes through the interior of the tube
and serves for the tightening of this tube on the stem at, by drawing the two
separate parts together by means of the longitudinal slit. Eventually, to give a
greater elasticity to the metal and to facilitate the tightening, the tube f is pro-
vided with a semi-circular opening ; made in its side, on the side opposite to the
ears but at the same end of the socket.
This socket 64 is fixed by means of a pin passing through the hole m, to the
part 61 formed by the joining of two similar sockets to b but connected at their
back part; in the same way the sockets 6 68 63 65 66 67, which serve to fit together
the stems a a, a, a, a7 are similar to the socket 6 but have no flattened part g
at their back part which has a shape suited to their purposes.
The frame is very easily fitted up by introducing the bamboos into the open ends
of the socket after having first made a notch in each end of the stems, and removed
the pins i from the sockets.
The pins are then put back into their place in such a way that they pass
through the notches of the bamboo stems, then the sockets are tightened on these
stems by screwing the nut of the pin i.
The bamboo stems are consequently held firmly by the tightening of the sockets

page_text: and by the pins i and cannot get loose and consequently a great rigidity is given
to the frame.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed, we declare that what
we claim is:
1) A cycle frame-in vegetable matter such as bamboo, any wood whatever, com-
_pressed paper and the like distinguished by the mode of fixing the frame parts
together by means of special sockets forming the joints.
2) A metallic socket for the fitting together of frames in bamboo, wood, com-
pressed paper or any suitable vegetable matter, distinguished by a tube slit longi-
tudinally at one end, provided, at each side of the slit, with an ear stamped in
the tube from the inside towards the outside; the said ears having a hole in their
lateral side, through which a pin passes and the said tube being eventually pro-
vided with a semi-circular opening made in the side opposite the ears but at the
same end as these latter, the other end of the tube being stopped and having a flat
part with a hole, or being fitted to other similar sockets, or being of any shape suited
to its purpose; the said socket being intended to firmly hold the stem fixed into it,
by the tightening of the slit part and by means of the tightening pin which is
fitted into a notch of the stems composing the frame.
3) An improved cycle frame substantially as described and shown.
Dated this 3rd day of February 1898
L. DUVINAGE,
Patent Agent, 8, Rue des Princes, Brussels, Belgium.