Improvements in High Pressure Ribbed Metal Pipes.
Year: 1898

page_text: Date of Application, 18th Jan., 1898-Accepted, 2nd Apr., 1898
COMPLETE SPECIFICATION.
Improvements in High Pressure Ribbed Metal Pipes.
I, HERMANN BREUER, of Höchst on the Main, in the Province of Hesse-
Nassau, German Empire, Manufacturer, 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 high pressure ribbed metal pipes, and
has for its object to increase the heating surface and strength of the same by the
employment of ribs cast upon such pipes in the manner hereinafter described.
In order to make my invention more clear, I refer to the accompanying drawing,
in which similar letters denote similar parts throughout the different views, and in
which:
Figure 1 represents a vertical section showing my invention, and
Figure 2 a cross section.
Proceeding to generally describe my improvements I will first remark that the
high pressure ribbed pipes or tubing forming the subject of this application,
consists of an inner tube, core, or tube proper (a) of iron or steel, said inner tube
being provided with an optional number of ribs, cast upon and encompassing the
said inner tube.
Any number of these ribs may be employed and the same may also be located
or arranged upon the tube at any optional distance from each other.
Furthermore the ribs may be of cast iron or any other optional material and it
will be just as apparent that the shape or form of the ribs can be considerably
and optionally varied without departing from the principle of my invention.
To name the characteristic features of my invention, I would state, that the same
resides in the various annular ribs or discs (6) being connected to each other by
means of central ridges, cross-bars or connecting-pieces, said cross-bars being cast
upon the pipe simultaneously with the ribs, and having not only the object of
keeping the ribs in proper position relative to each other, and of preventing the
same from twisting, but at the same time these intermediate cross-pieces (c)
considerably increase the strength of the pipe and render the same capable of use
for much higher pressures, for the reason that, all the ribs are hereby connected
together, and form, by means of, and with the said cross-pieces a complete and
solid body around and upon the tube and cause the same to possess very
considerable resistance against bending.
It should also be further remarked, that in consequence of the said cross-pieces,
being able to contract in the direction of their breadth during the cooling a break
or snapping of the intermediate cross-pieces by such contraction during the
cooling, is rendered impossible; this drawback, so often occurring, when cast
cross-pieces are used to connect cylindrical castings in general.
As hereinbefore indicated in consequence of this contraction of the said cross
pieces in my improved form of tube being in the direction of their breadth, the said
annular discs or ribs always remain connected as a solid and complete construction
possessing great resistibility even under extreme atmospheric changes.
I therefore regard my improved ribbed metal pipes as a new form of such pipes

page_text: or as a new heating element or body possessing the hereinbefore mentioned
characteristic, that the same are especially suitable for high pressures.
In conclusion my said improved pipes, in accordance with the material of which
the inner tube is formed, can be adapted for use for pressures up to 50 atmospheres
or even above, which thus renders such tubes or pipes especially suitable for use
not only for general purposes, but also for ammoniac-plant for cooling purposes, or
as a second instance for high pressure steam-plant for heating purposes.
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:-
An improved form of high pressure ribbed pipes, consisting of an inner tube (a)
of wrought iron, or steel; and a heating body encompassing the said inner tube,
the said outer body having annular discs or ribs (b) connected together by inter-
mediate cross-bars or ridges (c), by means of which the said ribs are caused to form
a solid and united body around the said inner tube, for the purpose as described.
Dated this 17th day of January 1808
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents for the Applicant.