An Improvement or Improvements in Metallic Tubes for the Steam Boilers of Locomotive and Marine and Stationary Steam Engines and for other Purposes.
Year: 1888

page_text: Date of Application, 30th Aug., 1888
Complete Specification Left, 16th May, 1889-Accepted, 29th June, 1889
PROVISIONAL SPECIFICATION.
An Improvement or Improvements in Metallic Tubes for the Steam
Boilers of Locomotive and Marine and Stationary Steam Engines
and for other Purposes.
We JOHN RUSSELL AND COMPANY Limited of Alma Tube Works Walsall in the
County of Stafford Tube Manufacturers and ARTHUR WILLIAM HUTTON of
No. 23 Lysways Street Walsall aforesaid Mechanical Engineer do hereby declare the
nature of this Invention to be as follows:-
The said Invention has reference to tubes for the steam boilers of locomotive steam
engines but is also applicable to the tubes of the steam boilers of marine and stationary
steam engines and for other purposes such for example as condensers.
In the ordinary method of manufacturing the said tubes the ends of the iron or
steel tube are reduced in external diameter a shoulder being formed where the
reduction sets in. A short piece of copper or brass tube has its internal diameter
enlarged by turning or otherwise so as to fit on the reduced end of the iron or steel
tube. The short copper or brass tube being put on the end of the iron or steel tube
the two are connected together by brazing. There is thus produced an iron or steel
tube having ends of copper or brass.
In making tubes according to the said invention an iron or steel tube is taken
A few inches of
having the length which it is intended the finished tube shall have.
each or either end of the tube is slightly reduced.in external diameter by means of a
bit or in a lathe or otherwise the reduced part tapering into.the part of full diameter
A short
that is there is no shoulder at the part where the reduced diameter sets in.
piece or sleeve of copper or brass tubing fitting the reduced end of the iron or steel
tube tightly is forced onto the reduced end of the iron or steel tube.
The tube with its copper or brass coated end is passed three or four times between
a pair of grooved rolls the grooves in which are of a size and shape suitable for
slightly reducing the diameter of the tube operated upon by them. By the action of
the said rolls the copper or brass tube or sleeve is firmly fixed upon the end of the
The rolling process is
iron or steel tube the diameter being slightly reduced.
performed cold and the tube does not necessarily require the internal support of a
:the iron or
mandril. After the copper or brass sleeve has been fixed on the.end
steel.tubo by rolling as described the tube is finished by the cutting off of its rough
end .and if necessary that end of the sleeve which overlaps the iron or steel tube is
In
trimmed by filing or turning in a lathe. This however is not often necessary.
tubes made according to the said invention the interior is of iron or steel throughout
while the ends are of copper.or brass.externally.
n this 20th dox of Ano 1888
W. T. WHITEMAN
Agent for the Applicants.
COMPLETE SPECIFICATION.
An Improvement or Improvements in Metallic Tubes for the Steam
Boilers of Locomotive and Marine and Stationary Steam Engines
and for other Purposes.
We JOHN RUSSELL AND COMPANY Limited of Alma Tube Works, Walsall in
the County of Stafford Tube Manufacturers and ARTHUR WILLIAM HUTTON of
No. 23 Lysways Street, Walsall, aforesaid Mechanical Engineer do hereby declare the
nature of the said .invention and in what manner the same is to be performed to he
particularly described and ascertained in and by the following statement :-
The said intention.has,reference. to tubes for the steam boilers of locomotive steam

page_text: engines but is also applicable to the tubes of the steam boilers of marine and stationary
steam engines and for other purposes such for example as condensers.
In the ordinary method of manufacturing the said tubes the ends of the iron or
steel tubes are reduced in external diameter a shoulder being formed where the
reduction sets in. A short piece of copper or brass tube has its internal diameter
enlarged by turning or otherwise so as to fit on the reduced end of the iron or steel
tube. The short copper or brass tube being put on the end of the iron or steel tube
the two are connected together by brazing. There is thus produced an iron or steel
tube having ends of copper or brass.
In making tubes according to the said invention an iron or steel tube is taken
having the length which it is intended the finished tube shall have. A few inches of
each or either end of the tube is slightly reduced in external diameter by means of a
bit or in a lathe or otherwise the reduced part tapering into the part of full diameter
that is, there is no shoulder at the part where the reduced diameter sets in. A short
piece or sleeve of copper or brass tubing fitting the reduced end of the wire or steel
tube tightly is forced on to the reduced end of the iron or steel tube. The tube with
its copper or brass coated end is passed three or four times between a pair of grooved
rolls the grooves in which are of a size and shape suitable for slightly reducing the
diameter of the tube operated upon by them. By the action of the said rolls the
copper or brass tube or sleeve is firmly fixed upon the end of the iron or steel tube
the diameter being slightly reduced. The rolling process is performed cold and the
tuhe does not necessarily require the internal support of a mandril.
After the copper
or brass sleeve has been fixed on the end of the iron or steel tube by rolling as
described the tube is finished by the cutting off of its rough end and if necessary that
end of the sleeve which overlaps the iron or steel tube is trimmed by filing or turning
in a lathe. This however is not often necessary. In tubes made according to the
said invention the interior is of iron or steel throughout while the ends are of copper
or brass externally.
Figure 1 of the accompanying Drawing represents in longitudinal section a portion
of an iron or steel tube the external diameter of the end of which has been reduced to
fit it to receive the copper or brass sleeve or short piece of copper or brass tubing
represented in Figure 2. It will be seen by an examination of Figure 1 that the
reduced end a of the tube tapers at into the part of full diameter there being no
shoulder at the part where the reduced diameter sets in and the end of the sleeve d
is made conical internally to fit the tapering part at c of the iron or steel tube.
The copper or brass sleeve d d Figure 2 having been forced onto the reduced
end a, e of the iron or steel tube 6 the said tube with its copper or brass coated
end is passed in a cold state several times through a pair of grooved rolls. By
the action of these rolls the diameter of the tube is slightly reduced and the
copper or brass sleeve d, d² fixed firmly on the end of the iron or steel tube as
represented in Figure 3. The tube is finished by cutting off its rough end and the
outer end of the copper or brass sleeve is trimmed if necessary.
It will be seen by an examination of Figure 3 that the interior of the tube is of
iron or steel throughout while the end is of copper or brass externally.
Each end of the iron or steel tube or either end may be coated externally with
copper or brass in the manner hereinbefore described and illustrated.
Although we have only described and represented the said invention as applied to
a tube of uniform diameter both internally and externally yet we wish it to be
understood that the said invention is equally applicable to tubes one or both ends of
which are of greater or less diameter than the other part of the tube.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that we claim
as the said invention of "An improvement or improvements in metallic tubes for
the steam boilers of locomotive and marine and stationary steam engines and for
other purposes
22
The process or combination of processes hereinbefore described and illustrated in

page_text: the accompanying Drawing for coating externally each or either end of iron or steel
tubes with a copper or brass sleeve or short piece of copper or brass tubing; that is
to say, reducing the external diameter of the eud of the iron or steel tube the reduced
end tapering into the part of full diameter, forcing the copper or brass sleeve upon
the reduced end of the tube and firmly fixing the said copper or brass sleeve upon the
end of the iron or steel tabe by rolling as described and illustrated.
Dated the Fourteenth day of May 1889
o JOHN RUSSELL & Co., LIMITED,
C. Marshall, Secretary.
ARTHUR WILLIAM HUTTON.
Per pro JOHN RUSSELL & Co., LIMITED,
C. Marshall, Secretary.
ARTHUR WILLIAM HUTTON.