An Improved Tube for Facilitating the Absorption or Radiation of Heat.
Year: 1891

page_text: Date of Application, 6th Mar., 1891
Complete Specification Left, 4th Dec., 1891-Accepted, 16th Jan., 1892
PROVISIONAL SPECIFICATION.
An Improved Tube for Facilitating the Absorption or Radiation
of Heat.
We, EDWIN CHARLES URRY, Engineer and GUILLERMO ANTONIO FARINI,
Gentleman, both of 232 Goswell Road, in the County of Middlesex do hereby
declare the nature of this invention to be as follows :-
Our invention relates to an improved tube for the better conduction of heat
and has for its objects the attainment of a much greater surface area than is the
case with ordinary tubes having the same external diameter, and also the
provision of a surface, the nature of which facilitates the rapid absorption and
radiation of heat.
In carrying our invention into effect we construct a tube of any suitable metal
or alloy, cast, or rolled and welded, so that the configuration of the cross section
presents three or more corrugations or volutes externally, and shaped in such a
manner as to form an equal number of longitudinal ribs internally. Any number
of such external corrugations and corresponding internal ribs may be formed upon
a metal tube constructed according to our invention, said number depending upon
the diameter of the tube, and the purpose to which it is to be applied. The effect
of this method of formation is to increase the area of the operative surface, and to
provide a number of acute angles thereon, which facilitates the absorption and
radiation of heat, whether the interior of the tube contains the medium of highest
temperature, or that this surrounds said tube exteriorly.
When such tubes are required to be fixed in tube plates we may cause the euds
to be rounded down by swageing or the like, if the metal be rolled and welded, or
cast into the desired shape, or said ends may be made solid and round, and exceeding
the diameter of the body of the tube, in other cases, and secured by a nut, ferrule,
or any equivalent means, or an ordinary flange may be formed upon, or attached
to, said ends for the same purpose.
Dated this 6th day of March 1891.
FREDK. WALKER,
11, Furnival Street, London, E.C., Agent for the Applicants.
COMPLETE SPECIFICATION.
An Improved Tube for Facilitating the Absorption or Radiation
of Heat.
We, EDWIN CHARLES URRY, Engineer, and GUILLERMO ANTONIO FARINI,
Gentleman, both of 232 Goswell Road Islington, in the County of Middlesex
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 :-
Our invention relates to an improved tube for the better conduction of heat,
and has for its objects the attainment of a much greater surface area than is the
case with ordinary tubes of the same external diameter, and also the provision of
a surface, the nature of which facilitates the rapid absorption and radiation
of heat.
In order that our invention may be clearly understood, we have appended the
accompanying sheet of drawings in which
Figure 1 is a plan view of the tube constructed according to our invention, and
Figure 2 is a side elevation of the same.

page_text: Figure is a cross section, and
Figure 4 shows a side sectional elevation.
Similar letters of reference indicate corresponding parts throughout the drawings.
In carrying our invention into effect we construct a tube A of any suitable
metal or alloy, cast, or rolled and welded, so that the configuration of the cross
section presents three or more corrugations or volutes externally, shaped in such
a manner as to form an equal number of longitudinal ribs internally. Referring
to Figure 1 said external corrugations are shown at a a¹ a" and the corresponding
internal ribs at in Figure 3. Any number of such external corrugations
and the corresponding internal ribs, may be formed upon a tube constructed
according to our invention, said number depending upon the diameter of the tube,
and the purpose to which it is to be applied.
The effect of this method of formation is to increase the area of the operative
surface, and to provide a number of acute angles thereon, which facilitates the
absorption and radiation of heat, whether the interior of the tube contains the
medium of highest temperature, or that this surrounds said tube exteriorly.
When such tubes are required to be fixed in tube plates, we cause the ends B
to be rounded, by moulding if the metal be cast, or by swaging or forging if said
metal be rolled and welded, or we may weld pieces of round tube thereon, and attach
to the tube plates by screwed nuts, ferrules, or any equivalent method. In other
cases a conical collar, with screwed extension may be formed upon the ends that
are required to be attached, said cone being pressed into a corresponding female
cone in the plate or the like by means of a nut, or we may use an ordinary flange
attached to, or formed upon the end or ends of said tube, for the same purpose.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
The construction and use of a metal tube for the conduction of heat, with three
or more longitudinal corrugations or volutes exteriorly, and a corresponding number
of longitudinal ribs interiorly, substantially as described, and illustrated by the
appended drawings.
Dated this 4th 1.
D1001
FREDK. WALKER,
11, Furnival Street, Holborn, London, E.C., Agent for the Applicants.