Improvements in Frames for Cycles.
Year: 1895

page_text: Date of Application, 25th Oct., 1895
Complete Specification Left, 9th July, 1896-Accepted, 10th Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in Frames for Cycles.
I CLAUDE FRANÇOIS PICHARD of 130 Avenue Parmentier Paris in the Republic
of France Engineer do hereby declare the nature of this invention to be as
follows:-
This invention relates to the construction of frames for cycles wherein two or
more tubes or tubular parts are to be connected together and consists in certain
improvements in the arrangements described in the Specification of the application
for Letters Patent dated the 27th day of October 1894 and No. 20,623.
As described in the Specification of my said application the tubes are connected by
means of junction sleeves or sockets within which each tube is held by the arrangement
hereinafter described.
According to my invention the junction sleeve or socket is bored out so as to
present openings of the form of two frustra of conoidal form with their smaller
ends next each other. The end of tube to be inserted in the opening before
being placed in position has a conoidal part which coincides with the upper conoidal
part of the junction sleeve. I employ a plug acting as a key or wedge and formed
in two parts the upper part is externally of the saine conoidal shape as the end of
tube and is formed with a recessed part in which takes a nut provided on its periphery
with threads engaging in the longer sides of the junction sleeve. The sides of the
lower part of the plug before being placed in position are parallel or approxi-
mately so and this part of the plug is divided into sections for example into four
sections by openings or slits a circular hole is formed in the plug screw threaded
through part of its length for receiving a screw with a conical head.
To join the parts together the tube is first passed through the junction sleeve until
the conoidal part thereof coincides with the upper conoidal of the junction sleeve.
The plug is then introduced into the tube from above, the screw having been first
secured into the said plug. The conoidal part of the plug being in contact with the
internal conoidal of the tube the screw is then screwed home into the plug.
Under the action of the conical head the said screw sections of the lower part of
the plug are forced outwardly and with them the tube which is enlarged so as to
coincide with the lower conoidal part of the junction sleeve. The nut is then
screwed into position so as to prevent any displacement of the plug. Instead of
a nut I may use any equivalent thereof.
Dated this 25th day of October 1895.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.
Improvements in Frames for Cycles.
I CLAUDE FRANÇOIS PICHARD of 130 Avenue Parmentier, Paris in the Republic
of ance Engineer, 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 :-
This invention relates to the construction of frames for cycles and consists of an
improved arrangement for connecting the fork arms to the fork crown.

page_text: Referring to the accompanying drawings
Fig. 1 is a plan of my arrangement seen from the under side for securing the fork
arms to the fork crown of a cycle.
Fig. 2 is a vertical section taken on the line a¹ Fig. 1.
Fig. 3 is a vertical section taken on the line y y' Fig. 1 at right angles to Fig. 2.
Figs. 4 and 5 are detached views of the various parts.
According to my invention a junction sleeve or socket B to receive the tubular
arm C is bored out so as to present an opening of the form of two frustra of
conoidal shape with their smaller ends next each other.
The end of the tube or tubular arm C to be inserted in the opening before being
placed in position has a conoidal part (Fig. 4) which coincides with the upper conoidal
part of the junction sleeve B. I employ a plug A (Fig. 5) acting as a key or wedge
and formed in two parts a a¹; the upper part a is externally of the same conoidal
shape (b) as the end of the tube and is formed with a recessed part e in which
takes a nut G provided on its periphery with threads engaging in the longer sides of
the junction sleeve B as shewn in Fig. 3. The sides of the lower part a¹ of the plug
before being placed in position are parallel or approximately so (see Fig. 5) and this
part of the plug is divided into sections for example into four sections by openings
or slits t, a circular hole c is formed in the plug A screw threaded through part
of its length for receiving a screw F with a conical head f.
To join the parts together the tube or tubular arm (Fig. 4) is first passed
through the junction sleeve B until the conoidal part thereof coincides with the
upper conoidal of the junction sleeve. The plug A is then introduced into the tube C
from above the screw F having been first secured into the said plug. The conoidal
part a of the plug being in contact with the internal conoidal part of the tube ✪ the
screw is then screwed home into the plug A. Under the action of the conical
head of the said screw F the sections of the lower part a' of the plug A are
forced outwardly and with them the tube C which is enlarged so as to coincide
with the lower conoidal part of the junction sleeve as shewn in Figs. 2 and 3.
The nut G is then screwed into position so as to prevent any displacement of the
plug. Instead of a nut I may use any equivalent thereof.
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 :-
The improved means for connecting the tubular fork arms to the fork crowns
of cycles substantially as hereinbefore described and illustrated in the accompanying
drawings.
The thi uth of....
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.