Improvements in Tubes for Velocipedes and the like.
Year: 1895

page_text: Date of Application, 4th Dec., 1895-Accented. 15th Feb., 1896
COMPLETE SPECIFICATION.
Improvements in Tubes for Velocipedes and the like.
I MAX ŠVAGROVSKÝ of 25 Ferdinand Strasse Prague in Bohemia, Austria,.
Gentleman 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 :-
Knowing that metallic tubes for velocipedes and the like are manufactured in
the thinnest gauge, and that such very thin tubes are often completely dangerous,
their resistance being never assured against the least irregularities of movements.
or strains, especially as these walls may often be burned and rendered brittle by
the process of brazing, to which they must be subjected in making frames thereof,
and for the purpose of obviating such and many other inconveniences of said
metallic tubes as used till now, construct my tubes with inner stiffening walls.
Such reinforcing walls may be produced either in folding the usual walls in some
parts together, into diametrical ribs, which are symmetrically disposed, and need not
reach to the centre of such tubes, but which may also be brazed together, or I
compose the whole section of the tube of partial sections with partly plain walls,.
these latter forming the division of the whole section, so that the whole tube may
be formed of the sectional tubes if these are joined together with their plain walls.
one upon the other. If such walls are simply diametrical and plain, such partial
tubes must be brazed together, to form a solid reinforced tube. But the partial
sections may also be made of dovetailed shapes, and in this case they can be
joined and may form one tube without brazing.
Tubes with such inwardly reinforced thin walls will present sufficient resistance
even in case of damage of the outward wall by brazing because the heat which
spoils the outer cannot possibly spread to the inner walls thus leaving the latter
intact.
It is not necessary that the sections of such reinforced tubes should be
circular. In fact such sections can assume any desirable form or figure.
DESCRIPTION OF DRAWINGS.
Figs. 1, 2 and 3 are examples of circular tube sections with inward reinforcing
ribs formed of their own walls in folding them together diametrically;
Figs. 4, 5 and are examples of circular tube sections composed of partial
sections the which are soldered, welded or brazed with their plain walls together;
Fig. 7 is a composed tube section, formed by two symmetrical partial sections
with a central cavity of a dovetailed section, into which fits a third sectional
tube;
Figs. 8, 9 and 10 are three partial tubes, of which Fig. 7 is composed.
In Figs. 1, 2 and 3, 1, 2 and so on, to 8 and 9, are inward diametrical ribs, the
which are formed in folding the material of the wall itself. It will be seen that
such ribs preferably may be placed or divided symmetrically as to the circumference.
The walls which form each rib may also be soldered or welded together.
It is not absolutely necessary to form the ribs in one piece with the circum-
ferential. wall. The whole section of the tube may also be composed of partial
sections, as for instance tubes a and b in Fig. 4, or tubes c, d, e in Fig. 5, or f g h i
in Fig. 6, and so on.

page_text: Such partial sections are formed with walls like 10-11, 13-17, 12—14, 15—16
and so on, the which may be soldered or welded together, to form a whole, and a
very efficient resisting tube for light frames and similar articles.
If the walls of such partial tubes f, g, h, i do not reach to the centre of such
tubes, these will show a second tube in their centre, as may be seen in
Fig. 6, 26-27-28-29 being the second concentrical tube.
Finally Fig. 7 shows a composed tube, which does not require either soldering or
welding, the inner partial tube k being of dovetailed section, as will be easily
understood from the drawings. Figs. 8, 9 and 10 are the partial sections forming
together the composed section as shown in Fig. 7. It will be seen that parts 31—35,
32-36, 33-37 and so on, when placed together constitute Fig. 7.
These few examples will completely suffice to illustrate the idea of my new
method of the construction of thin metallic tubes stiffened with inward walls,
though the details may be varied infinitely without changing the principle and
substance of my invention. Even wooden parts of similar constructions may be
similarly combined in the manner indicated by the Figs. 4 to 10, though they will
not be hollow.
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:
1. The construction and manufacture of light metallic tubes with inward ribs,
formed in folding the walls together, as and for the purposes shown and described.
2. The construction and manufacture of light metallic tubes, of which the
section is composed of partial sections, these being soldered welded or brazed
together by their mutual walls, as and for the purposes shown and described.
3. The construction and manufacture of light metallic tubes of the which
the section is composed of partial sections of dovetailed shapes, so that the
partial tubes will hold together with or without being welded or brazed at their
mutual walls, for the purposes shown and described.
Dated this 4th of December 1895.
GEO. THOS. HYDE,
1 Broad Street Buildings, London, E.C., Agent for Applicant.