Year: 1897

page_text: Date of Application, 5th June, 1897
Complete Specification Left, 12th Feb., 1898-Accepted, 9th Apr.,
1898
I, AUGUSTE DÉOM, of 7, Rue Lambert le Begue, Liege, Belgium, Mechanician,
do hereby declare the nature of this invention to be as follows:-
:-
The cycle fork which forms the object of the present invention consists of two
legs connected together, bent in a proper way to form the fork and strengthened
at their juncture by a safety coupling piece.
It is composed of three pieces, the right leg, left leg and a coupling.
The right leg is made of a steel tube bent in a suitable manner to form the half
of the fork, and completely closed.
The left leg is constructed in the same way, but from its bending point it is
split as far as its upper part and according to the generatrix of the hollow cylinder
which it forms, it is opened towards this bending point to admit the right leg
which is fastened in the interior of the left leg whose interior diameter is equal
to the outside diameter of the right leg.
When the top part of the right leg is introduced into the left leg, they are both
soldered together, the tube of left leg is soldered in a bevel. A rivet placed at
the point of juncture of the two legs completes the construction. The joints of
the two legs is protected by a cylinder composed of two parts which are joined by
being soldered together so as to leave the two legs in the cylinder. This latter
has its upper part threaded for a distance of 8 milimetres and the ball box is
screwed to it.
The new fork may be adapted to all velocipedes whose frames are made of hollow
stems.
Dated this 1th Jan 1907
I, AUGUSTE DÉOM, of 7, Rue Lambert-le-Begue, Liege, Belgium, Mechanician,
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 follow-
ing statement:-
:-
The present invention concerns a fork for cycles, whose different parts are fitted
together and soldered in such a way as to give it a great solidity and to render it
11

page_text: In the annexed drawing :
Fig. 1 shows a view in elevation of my improved fork,
Fig. 2 is a section on line X Y of Fig. 1, and
Fig. 3 a section on line x y of Fig. 1.
The fork is composed essentially of three parts in steel: the right branch A the
left branch B and the safety socket C.
The right branch A is formed of a tube in one piece having its lower part in
the same shape as with ordinary forks from which it differs only in its shape at the
point of connection with the branch B and in its prolongation to the upper
extremity E of the steering tube K.
The left branch. B is formed of a tube of the same shape as A but provided with
an opening I and of a longitudinal slit going from this opening to the upper end E
of the tube so as to be able to introduce the right arm A into it, whose outside
diameter is equal to the inside diameter of B.
The tube A being fitted into B, so as to be completely covered by this latter
from the point D, the two tubes A and B are soldered together as also the two
edges of the longitudinal slit of the tube B; moreover the fitting of the two tubes
is completed and consolidated by a pin L which passes through these latter at
their joining point and is held by the socket C which covers it.
The safety-socket C which protects the connecting part of the tubes A and B
is composed of two similar parts soldered together at their edges F G H so as to
allow the two arms of the fork to pass through the socket at the same time pre-
venting them from giving way at I to the effort exercised upon the fork by the
weight of the cyclist.
With the object of securing the solidity of the assemblage, the socket C has
its upper part threaded to screw a ring M upon it, this ring forming the ball case
of the steering tube.
This new fork may be applied to bicycles and in general to all cycles whose
frames are formed of hollow tubes.
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) An unbreakable fork for cycles, distinguished by two arms in steel tube,
bent in a suitable way, and by a safety socket also in steel and constructed in two
parts; one of the said arms being provided with an opening and being slit longitu-
dinally at its upper part to introduce the corresponding part of the other arm into
it, the outside diameter of this said arm being equal to interior diameter of the
first; the said arms being soldered together as also the edges of the longitudinal
slit and the fitting of the two tubes being moreover consolidated by a pin which
passes through them at their joining point and which is covered by the safety
socket whose two parts are soldered together and whose upper part is threaded to
screw a ring upon it, this ring serving as a ball case for the steering tube; the
object of the said safety socket being to consolidate the assemblage of the two arms
of the fork at their joining point.
2) An improved fork for cycles substantially as described and shown.
Dated this 10th day of Februar 1000
4
L. DUVINAGE,
Patent Agent, 8, Rue des Princes, Brussels, Belgium.