Improvements in the Mode of Fixing Metallic Tubular Pieces on each other, applicable to Cycle and other Framing or Tubing.
Year: 1897

page_text: Date of Application, 9th Apr., 1897
Complete Specification Left, 2nd Sept., 1897-Accepted, 20th Nov., 1897
Improvements in the Mode of Fixing Metallic Tubular Pieces on each
other, applicable to Cycle and other Framing or Tubing.
I, PETER JENSEN of 77 Chancery Lane London Chartered Patent Agent, do
hereby declare the nature of this invention, a communication to me from abroad
by the Firm of Hoyer and Glahn, of Schonebeck on the Elbe, Germany Manu-
facturers, to be as follows:-
In the latent Specification 22807 of 1895 is described a process and apparatus
for fixing metallic tubes on each other, the apparatus being inserted in the super-
posed pieces of tube to be united and consisting of a hollow rotatable cylinder
provided with an inner screw spindle having a cone and with steel balls which
when the spindle is fed forward are forced outward by the cone and produce
bulgings in the two superposed pieces of tube thereby uniting them.
This present invention is applicable to the aforesaid invention and to other
inventions for joining tubular pieces where balls cams rollers screws or other tools
are used for forming indentations in the tubular pieces, and that either from
within or from without for the purpose of uniting them.
The invention consists in providing within the innermost of the two superposed
tubes a thin metallic sleeve or socket against which the balls, cams or other
bulging tools act, instead of as heretofore acting directly upon the inner surface
of the inner tube end, for it has been found that such direct action sometimes
injures the said inner tube end and thus weakens it, whereas the aforesaid sleeve
protects it against such chance of injury and maintains its homogeneity.
sleeve is thus not a reinforce but a mere protecting intervening shield which may
be removed after use if desired and or a reinforce provided. Similarly in the case
of a process and apparatus for bulging or indenting from without a thin outer
sleeve is provided upon the outer tube.
Dated thin 0th day of : 1907
The
Improvements in the Mode of Fixing Metallic Tubular Pieces on each
other, applicable to Cycle and other Framing or Tubing.
I, PETER JENSEN of 77 Chancery Lane London Chartered Patent Agent, do
bereby declare the nature of this invention, a communication to me from abroad
071

page_text: by the Firm of Hoyer and Glahn, of Schonebeck on the Elbe, Germany, Manu-
facturers, and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:-
In the Patent Specification No. 22807 of 1895 is described a process and apparatus
for fixing metallic tubes on each other, the apparatus being inserted in the super-
posed pieces of tube to be united and consisting of a hollow rotatable cylinder
provided with an inner screw spindle having a cone and with steel balls which
when the spindle is fed forward are forced outward by the cone and produce
bulgings in the two superposed pieces of tube thereby uniting them.
This present invention is applicable to the aforesaid invention and to other
inventions for joining tubular pieces where balls cams rollers screws or other tools
are used for forming indentation or other alterations of form in the tubular pieces,
and that either from within or from without for the purpose of uniting them.
The invention consists in providing within the innermost of the two superposed
tubes a thin metallic sleeve or socket against which the balls, cams or other
bulging or expanding tools act instead of as heretofore acting directly upon the
inner surface of the inner tube end for it has been found that such direct action
sometimes injures the said inner tube and thus weakens it, whereas the aforesaid
sleeve protects it against such chance of injury and maintains its homogeneity.
The sleeve is thus not a reinforce but a mere protecting intervening shield which
may be removed after use if desired and a reinforce may be then provided instead.
Similarly in the case of an apparatus for bulging indenting or otherwise shaping
from without a thin undersleeve is provided upon the outer tube and such sleeve
may also if desired be removed after it has served its purpose.
In the accompanying drawings Fig. 1 is a vertical section through a tubular
joint for connecting the steering fork tube A with the upper tubular member B.
of a bicycle frame. C. is the joint piece for the parts A and B.
D D D are
sleeves of thin metal which serve to protect the parts to be bulged and these sleeves
re acted upon directly by the bulging tools and may as stated be removed after
having served their purposes.
Fig. 2. shews the invention applied to another joint form where the part C is
a casting which is fixed to the tube piece A by forming an annular groove A¹ or
two such in the piece A corresponding to the groove in the piece C. and by
expanding the end of the tube B corresponding to the cone form of C. this latter
being driven on hot before the ends of the tube pieces A and B are respectively
bulged and conically expanded.
Fig. 3 shews a two groove form of cast socket piece C, the piece A and B and
the sleeve D. being correspondingly grooved after insertion in the socket C.
Fig. 4 shews yet another form where the uniting socket C is made conical towards
both ends.
The parts A, B, and C. should be tinned before being put together. When the
part C. has cooled down after the bulging or expanding has been effected it fits
tightly on the parts A and B, the two forming the soft medium between them to
ensure accurately fitting surfaces in contact and the filling of any minute cavities
between them as described and claimed in the Patent Specification 27645 of
4th December 1896 and as described in the Patent Specification No. 27666 of the
same date.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me by my foreign correspondents and in what manner
the same is to be performed I declare that what I claim is :-
The application and use in connection with tube joints of the character described
of a thin metallic sleeve or socket interposed between the bulging expanding or
L 1. 1..บ

page_text: contracted by said tool or tools for the purpose of preventing injury thereto and for
maintaining its homogeneity substantially as set forth.
Dated this 2nd day of September 1897.
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.