An Improved Joint for Tubes.
Year: 1889

page_text: Date of Application, 27th Nov., 1889
Complete Specification Left, 27th Aug., 1890-Accepted, 11th Oct., 1890
PROVISIONAL SPECIFICATION.
An Improved Joint for Tubes.
1, ROBERT HOWARTH, of 53 Goldthorn Terrace Penn Road, Wolverhampton, in
the County of Stafford, Engineer, do hereby declare the nature of my invention for
an IMPROVED JOINT FOR TUBES, to be as follows:-
This invention relates to an improved method of joining together, and making water-
tight the adjacent ends of thin iron or other metallic tubes made of a ductile metal,
without weakening the ends by cutting a screw thread upon them.
In carrying out the purpose of my invention I take any suitable tube, and expand
one end making it funnel shaped, the other end I make conical, by expanding the
tube from the inside thus leaving the small end of the cone of the same diameter as
the tube.
In operation the conical end of the tube, provided with a suitable packing, is placed
within the opposite or funnel shaped end of a corresponding tube, the two parts are
then drawn towards each other by means of glands and bolts or some such known
contrivance, the expanded portions of the tubes serving to hold the glands in position
under pressure, thus the funnel shaped end of one tube is forced upon the cone shaped
end of another tube forming a watertight and rigid joint.
ليمد
1000
ROBERT HOWARTH.
COMPLETE SPECIFICATION.
An Improved Joint for Tubes.
I, ROBERT HOWARTH of 53 Goldthorn Terrace, Penn Road Wolverhampton, in
the County of Stafford 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, reference being had to the accompanying
drawing, and the letters of reference marked thereon, (thab'is to say) :-
-
My invention relates to an improved method of joining together and making water
tight the aljacent ends of thin iron or other metallic tubes, made of a ductile metal,
without weakening the ends by cutting a screw thread upon them, thus being able to
make such tube of a required strength of considerably thinner metal than usual.
This invention consists primarily in making the joint by expanding the end of one
tube so as to fit tightly on the adjacent end of another tube, and for this purpose I
take any suitable tube, and expand a socket on one end, such socket being taper, with
the larger diameter at its outer eni, the other end of such tube I shape like the
frustrum of a cone, by expanding the tube from the inside, leaving the end of such
size and shape externally as will fit, and drive tightly, into the socket end of another
tube prepared to receive it, the parts being drawn towards each other by means of
bolts passing through loose flanges which abut against raised portions of such tubes
placed in any convenient position; the conical end of one tube forming the joint, is
provided with suitable jointing material to enable such joint between the parts to
be made thoroughly tight. This invention comprises also an arrangement for
strengthening the edge of the socket by placing a strong metallic hoop around it
which so stiffens the edge of such socket that it can be caulked tightly into and around
that portion of a corresponding tube within it, when a very high pressure is to be
employed within the tubes.

page_text: This invention will be clearly understood on reference to the accompanying drawing
of which
Fig. 1 represents in longitudinal section a joint formed according to this invention
between the ends of two tubes.
To make the joint the tube A with the taper end B, prepared with suitable jointing
material about its outer surface, is entered within the socket C, of the tube D, loose
temporary collars are then placed behind the raised portions a. a. and by means of
screw-bolts the parts are drawn tightly towards each other, the edge of the socket C,
being strengthened by the hoop E, is caulked, by means of a suitable tool into and
around the tube within it, thus securing the parts against the possibility of being
accidentally withdrawn.
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 ;
First. A joint between two tubes made of a ductile metal, formed by inserting the
cone shaped end of one tube, prepared with suitable packing, or jointing material,
within the socket shaped end of another tube, and drawing such parts tightly together
the one over the other by means of loose temporary collars placed behind raised
portions of each tube, provided with means by which such parts may be drawn tightly
towards one another substantially as and for the purposes set forth.
Second. A joint between two tubes made of a ductile metal, such joint being made
by forcing the cone shaped end of one tube tightly within the socket shaped end of
another tube made to fit it as aforesaid, and caulking the edge of the parts in contact
to insure a perfect joint, the socket being strengthened by the addition of a strong
metallic hoop placed tightly around its outer edge substantially as described and
illustrated in the drawing annexed.
Third. A joint between two tubes as aforesaid, the drawing asunder of such parts
being prevented by the socket of the external tube being caulked into a groove
formed in and around the contained tube, such groove being produced either by the
act of caulking or by a separate operation, substantially as described for the purpose
set forth.
Fourth. A joint between two tubes as aforesaid the parts of which are drawn
tightly towards each other by means of loose temporary collars and screw-bolts
abutting against raised portions of the tubes placed in any convenient position
substantially as and for the purposes described.
Fifth. The employment of a taper socket in combination with the end of another
tube made to fit it such parts being drawn towards one another in making a joint
between them substantially as described.
Dated this 96th ler of Au 1900
ROBERT HOWARTH.