IMPROVEMENTS IN METAL TUBES FOR BOILERS, CONDENSERS OR THE LIKE
Year: 1885

page_text: This Specification was, upon the 16th day of April 1889, Amended under
Sections 18 to 21 of the Patents, Designs, and Trade Marks Act, 1883.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co, Patent Agents,
Southampton Buildings, in the County of Middlesex do hereby declare the nature
of my invention for "IMPROVEMENTS IN METAL TUBES FOR BOILERS, CONDENSERS
OR THE LIKE to be as follows:
"
This invention relates to metallic tubes for boilers, condensers, or the like and
has for its objects to auginent their capability of transmitting heat or cold and at
the same time to increase their rigidity.
These objects are obtained by providing the tubes with a number of longitudinal
wings which are arranged either on the inside or outside of the tubes, or both
inside and outside, one forming, whenever possible, an extension of the other.
The said wings may have a rectilinear or curved or other suitable form, and their
dimensions and the positions which they occupy may vary.
Any kind of tubes, whether welded or weldless, may be provided with wings
by any of the known methods of manufacture, that is to say, in certain cases, the
wings can be formed when rolling the sheet of metal serving for the manufacture
of the tube; in other cases they can be obtained by folding the sheet; while in
others they can be attached. "The wings can also be obtained directly in the
drawing of the tubes.
Folds are sometimes formed in the tubes, in the grooves of which are secured
bars having different sections according to requirements. The wings can, more-
over, be simply fastened upon the tube either by rivetting or welding.
11
HASELTINE, LAKE & Co.,
For the Applicant.

page_text: COMPLETE SPECIFICATION (AMENDED).
Improvements in Metal Tubes for Boilers, Condensers,
or the like.
J, HENRY HARRIS LAKE, of the firm of Haseltine, Lake and Co, Patent Agents,
Southampton Buildings, in the County of Middlesex, do hereby declare the nature
of my invention for "IMPROVEMENTS IN METAL TUBES FOR BOILERS, CONDENSERS,
OR THE LIKE" and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention relates to metallic tubes for boilers, condensers or the like and has
for its objećt to agument their capability of transmitting heat or cold, and, at the
same time, to increase their rigidity.
These objects are obtained by providing the tubes with a number of longitudinal
wings, which are arranged either on the inside or outside of the tubes, or both
inside and outside, one forming wherever possible an extension of the other.
The said wings may have a rectilinear or a curved or other suitable form, and
their dimensions, and the positions which they occupy, may vary within the limits
hereinafter defined.
Any kind of tubes whether welded or weldless, may be provided with wings by
any of the known methods of manufacture, that is to say, in certain cases, the
wings can be formed when rolling the sheet of metal serving for the manufacture
of the tube; in other cases they can be obtained by folding the sheet; while in
others they can be attached. The wings can also be directly formed in the
drawing of the tubes.
In the accompanying drawing.
Figure 1 represents the cross section of a weldless tube, having wings on the
inside.
Figure 2 shows the cross section of a weldless tube, having wings on the outside.
Figure 32 shows the cross section of a weldless tube, having wings on both the
inside and outside.
Figure 43 shows the cross section of a tube having a welded joint and the wings
of which are formed by folds inade longitudinally in the metal, all the joints of the
wings being welded. These-wings can be arranged to project from the extension of
the tube, as shown in Figure 2.
Figure 4 shows, the cross section of a welded tube, having both internally and
externally projecting wings. These wings as in the preceding case are formed by
folding the metal longitudinally, the said folds being welded.
Figure 5 shows the cross section of a welded tube having both internal and
external wings. These wings are formed by folding the metal to form grooves, and
by welding into the said grooves bars having different sections according to the
purpose for which the tube is required.
Instead of forming the wings as before described they may be simply fastened
upon the tube by rivetting or in some other suitable manner.
1
The wings and tubes can be made of other forms than those shown in the
drawing, and of any desirable dimensions, within the limits hereinafter defined and the
said wings can be formed upon sheets of metal prior to the formation of the tube,
or directly in the drawing of the tube, and upon welded as well as weldless tubes.

page_text: Tubes having wings as described can be employed for the condensation of steam
in surface condensers and in other similar apparatus, as well as in steam boilers.
The advantages of the improved construction are that the said wings augment in
a very great measure the transmission of heat and consequently diminish to a
large extent the consumption of fuel in steam boilers, and that they increase the
rigidity of the tubes and consequently enable the employment in the manufacture
of the said tubes of certain metals which could not formerly be used for the
purpose.
I do not include in my claim flues furnaces or fire boxes but only small tubes such as
are used in boilers having small tubes for the passage of the gases or in condensers or the
like by which for instance the hot gases are led through the water space of a steam boiler
or through which the steam to be condensed pusses as I consider that my said invention is
for my object practically of use only in the case of such tubes.
It will be observed from the accompanying drawings that the internal rings are shewn
as extending to a considerable distance inwards towards the centre or axis of the tube.
They should so extend for at least a distance equal to one fourth of the distance from
the internal circumference of the tube to the centre or axis thereof as it is necessary in
order to attain the object of my Incention that the said wings should project into the
hotter portion of the gases or vapours passing through the tubes as there is a limit of
space next to the inner circumference of the tube where the gases or vapours become
quickly cooled by contact forming a relatively cool zone and the ribs must extend beyond
this limit as shewn in the drawings if a practically useful result is to be attained.
I do not therefore claim tubes made internally with short ribs less than the dimensions
sufficient to attain the result referred to above.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed as communicated
to me by my Foreign Correspondent I declare that what I claim is :-
First. The application to welded or weldless tubes for steam boiler condensers
or the like of internal wings formed integral with the said tubes for the purpose
specified and as hereinbefore defined.
Second. A tube for steam boilers, condensers or the like provided with wings
upon one-or the inside or on both surfaces, substantially as described and as
hereinbefore defined.

page_text: I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake, & Co, Patent Agents,
Southampton Buildings, in the County of Middlesex do hereby declare the nature
of my invention for "IMPROVEMENTS IN METAL TUBES FOR BOILERS, CONDENSERS
OR THE LIKE to be as follows:-
"
This invention relates to metallic tubes for boilers, condensers, or the like and
has for its objects to augment their capability of transmitting heat or cold and at
the same time to increase their rigidity.
These objects are obtained by providing the tubes with a number of longitudinal
wings which are arranged either on the inside or outside of the tubes, or both
inside and outside, one forming, whenever possible, an extension of the other.
The said wings may have a rectilinear or curved or other suitable form, and their
dimensions and the positions which they occupy nay vary.
Any kind of tubes, whether welded or weldless, may be provided with wings
by any of the known methods of manufacture, that is to say, in certain cases, the
wings can be formed when rolling the sheet of metal serving for the manufacture
of the tube; in other cases they can be obtained by folding the sheet; while in
others they can be attached. The wings can also be obtained directly in the
drawing of the tubes.
Folds are sometimes formed in the tubes, in the grooves of which are secured
bars having different sections according to requirements. The wings can, more-
over, be simply fastened upon the tube either by rivetting or welding.
HASELTINE, LAKE & Co.,
For the Applicant.

page_text: or the like.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co, Patent Agents,
Southampton Buildings, in the County of Middlesex, do hereby declare the nature
of my invention for "IMPROVEMENTS IN METAL TUBES FOR BOILERS, CONDENSERS,
OR THE LIKE" and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention relates to metallic tubes for boilers, condensers or the like and has
for its object to augment their capability of transmitting heat or cold, and, at the
same time, to increase their rigidity.
These objects are obtained by providing the tubes with a number of longitudinal
wings, which are arranged either on the inside or outside of the tubes, or both
inside and outside, one forming wherever possible an extension of the other.
The said wings may have a rectilinear or a curved or other suitable form, and
their dimensions, and the positions which they occupy, may vary.
Any kind of tubes whether welded or weldless, may be provided with wings by
any of the known methods of manufacture, that is to say, in certain cases, the
wings can be formed when rolling the sheet of metal serving for the manufacture
of the tube; in other cases they can be obtained by folding the sheet; while in
others they can be attached. The wings can also be directly formed in the
drawing of the tubes.
In the accompanying drawing.
Figure 1 represents the cross section of a weldless tube, having wings on the
inside.
Figure 2 shows the cross section of a weldless tube, having wings on the outside.
Figure 3 shows the cross section of a weldless tube, having wings on both the
inside and outside.
Figure 4 shows the cross section of a tube having a welded joint and the wings
of which are formed by folds made longitudinally in the metal, all the joints of the
wings being welded. These wings can be arranged to project from the extension of
the tube, as shown in Figure 2.
Figure 5 shows the cross section of a welded tube, having both internally and
externally projecting wings. These wings as in the preceding case are formed by
folding the metal longitudinally, the said folds being welded.
Figure 6 shows the cross section of a welded tube having both internal and
external wings. These wings are formed by folding the metal to form grooves, and
by welding into the said grooves bars having different sections according to the
purpose for which the tube is required..
Instead of forming the wings as before described they may be simply fastened
upon the tube by rivetting or in some other suitable manner.
The wings and tubes can be made of other forms than those shown in the
drawing, and of any desirable dimensions, and the said wings can be formed upon
sheets of metal prior to the formation of the tube, or directly in the drawing of the
tube, and upon welded as well as weldless tubes.

page_text: Tubes having wings as described can be employed for the condensation of steam
in surface condensers and in other similar apparatus, as well as in steam boilers.
The advantages of the improved construction are that the said wings augment in
a very great measure the transmission of beat and consequently diminish to a
large extent the consumption of fuel in steam boilers, and that they increase the
rigidity of the tubes and consequently enable the employment in the manufacture
of the said tubes of certain metals which could not formerly be used for the
purpose.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed as communicated
to me by my Foreign Correspondent I declare that what I claim is
First. The application to welded or weldless tubes for steam boiler condensers
or the like of wings formed integral with the said tubes for the purpose specified.
Second. A tube for steam boilers, condensers or the like provided with wings
upon one or both surfaces, substantially as described.
.
A
100
HASELTINE, LAKE & Co.,
For the Applicant.