Year: 1895

page_text: 1, ADRIEN GIRBES, of 9 Rue de Ste. Chapelle, Paris, in the Republic of
France, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in tubular joints whereby I am enabled to
dispense with the usual brazing, joint pins or screws.
My invention is particularly applicable to the frames of velocipedes in which it
is necessary to obtain great rigidity without increase of weight.
Referring to the accompanying sheet of drawings, Figures 1, 2 and 3 represent
a tubular joint constructed in accordance with my invention, and similar letters
refer to similar parts.
Tand T are tubes which it is desired to join together upon the ends of which
one or more beads may be wheeled or otherwise formed, as shown at r and sion
Figure 3; and the ends of the tubes T may also be furnished with slits F.
In the illustration given, the tubes T and T' are joined together by means of a
coupling, consisting of two sockets D and M. which are bored out to receive the
ends of the said tubes. The sockets may also have one or more grooves or
recesses sunk on their inner face to receive a corresponding bead formed upon
the end of the tube or tubes. The socket D may also be broached or bored
slightly conical, the broader part being towards the socket M.
I
The tube T having been inserted in the socket D, if provided with a bead r see
Figure 3, is sprung into position so that the said bead enters the groove g. It is.
further secured by means of the looped ferrule C which is driven down by a
mandrel m and tool m' por by any other suitable device, the diameter of the tube T
being thereby increased at its upper extremity, that is, the part nearest the
socket M, and consequently firmly retained in position. The mandrel m is then
withdrawn by any suitable means.
I afterwards insert the second tube T' in a similar manner to that above
described. This tube is caused to enter the socket M and, if necessary, a bead is
formed thereon by means of an expanding mandrel or similar device by which said
tube conforms to the groove g as at s on Figure 3.
The insides of the sockets and the ends of the tubes may be tinned, if desired,
before being secured in position, so that the whole can readily bo soldered
together at a low. temperature by means of a blowpipe or other source of heat,
without brazing or otherwise heating the metal to an extent which would
injuriously affect the same.
Dated this Thirteenth day of November 1895.

page_text: Improvements in Tubular Joints.
I, ADRIEN GIRBES, of 5 (formerly of 9) Rue de Ste. Chapelle, Paris, in the
Republic of France, 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 :-
My invention relates to improvements in tubular joints whereby I am enabled to
dispense with the usual brazing, joint pins or screws.
My invention is particularly applicable to the frames of velocipedes in which it
is necessary to obtain great rigidity without increase of weight.
Referring to the accompanying sheet of drawings, Figures 1, 2 and 3 represent
a tubular joint constructed in accordance with my.invention, and similar letters
.refer to similar parts.
In carrying out my invention I. may form upon the tubes T and T', which it is
desired to join together, one or more beads r and s, as shewn on Figure 3, by
rolling or other suitable operation, and the ends of the tubes T may also be
,furnished with.slits F in order to give them a certain amount of spring.
In the illustration given, the tubes T and T' are joined together by means of
a coupling, consisting of two sockets D and M which are bored out to receive the
ends of the said tubes. The sockets, D, M, may also have one or more grooves.or
recesses g.sunk on their inner face to receive a corresponding bead or s, mentioned
.above, formed upon. the end of the tube or tubes. One socket D may also be
broached or bored slightly conical, the wider part being arranged towards the
other socket M as shown.
The tube T having been inserted in the socket D, if provided with a bead
(see Figure 3), is sprung into position so that the said bead enters the groove.g.
is further secured by means of a tapered ferrule C which is driven down by a
mandrel m and tool.m p, both indicated on Figure 2 by dotted lines, or by any
other suitable device, the diameter of the tube T being thereby increased at its
upper extremity, that is, the part nearest the socket M, and consequently firmly
retained in position. The mandrel m is then withdrawn by any suitable means.
I afterwards insert the second tube T in a similar manner to that above
described. This tube is caused to enter the socket M, and if necessary, a bead is
formed thereon by means of an expanding mandrel or similar device by which the
said tube is caused to conform to the groove g as shown on Figure 3.
The insides of the sockets D, M, and the ends of the tubes may be tioned, if
.desired, before being secured in position, so that the whole can readily be soldered
together at a low temperature by means of a blow-pipe or other source of heat,
without brazing or otherwise heating the metal to an extent which would
injuriously affect the same.
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 :-
:
In the construction of joints for metallic tubes, the use of coupling sockets D
and M, with or without grooves on their inner faces to receive corresponding beads
formed on the ends of the tubes to be joined, in combination with a tapered
ferrule C driven by means of an expansible mandrel or equivalent device into the
end of one tube T, said tubes being optionally provided with slits at their ends to

page_text: facilitate springing them into position, and the joint being subsequently soldered at
a low temperature by means of a blowpipe or other ordinary method, as described
with reference to the accompanying drawings.
Dated this Thirtieth day of May 1896.
facilitate springing them into position, and the joint being subsequently soldered at
a low temperature by means of a blowpipe or other ordinary method, as described
with reference to the accompanying drawings.
Dated this Thirtieth day of May 1896.
For the Applicant,
GEDGE & FEENY,
60 Queen Victoria Street, London, E.C., Chartered Patent Agents.