Improvements in Tube Plates for Boilers or the like.
Year: 1892

page_text: Date of Application, 31st Oct., 1892
Complete Specification Left, 6th June, 1893—Accepted, 15th July, 1893
PROVISIONAL SPECIFICATION.
Improvements in Tube Plates for Boilers or the like.
JOHN HENRY HECK Glenwood, Eveswell Park Newport, Monmouthshire
Engineer. I do hereby declare the nature of this invention to be as follows:-
:-
This invention relates to tube plates for boilers or the like & has for its object
to stiffen the ends of the tubes & to protect them from the direct contact of flame,
fire or undue heat, and at the same time to increase the number & the water & steam
tightness of the connections or joints between the tube plates & the tubes.
These objects are obtained by having a suitable number of holes in the tube
plates of less size than the internal diameter of the tube ends and forming on the
steam or water side of the tube plates, concentric with these holes, annular recesses
of suitable depth & diameter, such annular recesses forming an integral part of the
tube plates, into which the ends of the tubes are inserted & made tight by
expanding the tube plates in way of the holes first mentioned, the annular
recesses may also have a thread formed upon them so that the tube ends may be
screwed in.
The said annular recesses may be formed wholly or partly in projections formed
on the tube plates, such projections being part of the plates & being formed either
by Hanging the plates or other means.
The portion or parts of the annular recesses or tube plate inside the tube ends
may project any length or distance into the internal part of the tube ends, so as to
stiffen and protect any length of the internal part of the tubes.
The said annular spaces or recesses may also be formed by boring suitable holes,
equal to, or less than the internal diameter of the tube ends, and then making on
the steam or water side of the plates, concentric with the holes, recesses of suitable
depth & having a diameter equal to the external diameter of the tube ends, such
recesses being formed into annular recesses by the insertion or screwing in of a
short length of tube with a suitable head, through the hole on the flame or fire side
of the plates.
Dated this 20th day of Ontalan 1000
JOHN H. HECK.
COMPLETE SPECIFICATION.
Improvements in Tube Plates for Boilers or the like.
JOHN HENRY HECK, Glenwood, Eveswell Park Newport, Monmouthshire
Engineer. I 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 :-
This invention relates to tube plates for boilers or the like and has for its object
to stiffen the ends of the tubes and to protect them from the direct contact of
flame, fire or undue heat and at the same time to increase the number and the water
and steam tightness of the connections or joints between the tube plates and
the tubes.
These objects are obtained by having a suitable number of holes in the tube
plates of less size than the internal diameter of the tube ends, and forming on the
steam or water side of the tube plates concentric with these holes, annular recesses
of suitable depth and diameter, such annular recesses forming an integral part of
the tube plates, into which the ends of the tubes are inserted and made tight by
expanding the tube plates in way of the holes first mentioned, the annular

page_text: recesses may also have a thread formed upon them so that the tube ends may be
screwed in.
The said annular recesses may be formed wholly or partly in projections formed
on the tube plates, such projections being part of the plates & being formed either
by flanging or machining the plates or other means.
The portion or parts of the annular recesses. or tube plate inside the tube ends
may project any length or distance into the internal part of the tube ends, so as to
stiffen and protect any length of the internal part of the tubes.
In the accompanying drawing, A represents part of a back tube plate of a steam
boiler, F part of a front tube plate, T one of the tubes and R one of the said
annular recesses.
Fig. 1 shows a longitudinal section through the centre of a tube and annular
recess in a tube plate.
Fig. 2 shows a longitudinal section through the centre of a tube and annular
recess of a tube plate in which the part of the tube plate or annular recess inside
the tube projects beyond that part of the tube plate or annular recess in contact
with the external part of the tubes.
Fig. 3. shows a longitudinal section through the centre of a tube and annular
recess in a tube plate having projections in which the annular recesses are wholly or
partly formed in such projections.
The annular recesses can be made of any desirable dimensions & depth and either
plain or with a screw thread so that the tube ends can be either inserted.&
expanded or screwed in & expanded.
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. The application to back tube plates or other tube plates for steam boilers
or the like of annular recesses made in the solid part and formed integral with the
said tube plates for the purposes specified.
Second. A tube plate for steam boilers or the like provided with annular
recesses formed in the solid part & integral with such plates into which the tube
ends can be either inserted & expanded or screwed in and expanded substantially as
described.
Dated this 5th day of June 1802