IMPROVEMENTS IN MARINE STEAM BOILERS
Year: 1860

page_text: LETTERS PATENT to Edward Humphrys, of Deptford, in the County
of Kent, Engineer, for the Invention of "IMPROVEMENTS IN MARINE
STEAM BOILERS."
Sealed the 3rd August 1860, and dated the 11th February 1860.
PROVISIONAL SPECIFICATION left by the said Edward Humphrys,.
at the Office of the Commissioners of Patents, with his Petition, on the
11th February 1860.
I, EDWARD HUMPHRYS, of Deptford, in the County of Kent, Engineer,
do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN MARINE STEAM BOILERS," to be as follows:-
This Invention has for its object improvements in steam boilers, when such
boilers are employed to supply superheated steam, and consists in constructing
the uptake of the boiler in such a form as to render it suitable for the recep-
tion of a number of vertical tubes, the uptake being part of the main boiler.
These vertical tubes being introduced serve as a superheating apparatus, and
render it unnecessary to employ any pipes or valves for conducting the steam
to such apparatus, and hence there is less liability to derangement.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Edward Humphrys, in the Great Seal Patent Office on the
11th August 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
HUMPHRYS, of Deptford, in the County of Kent, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eleventh day of February, in the year of our Lord
One thousand eight hundred and sixty, in the twenty-third year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Edward Humphrys, Her special licence that I, the said Edward Humphrys,
my executors, administrators, and assigns, or such others as I, the said
Edward Humphrys, my executors, administrators, and assigns should
at any time agree with, and no others, from time to time and at all
times thereafter during the term therein expressed, should and law-
fully might make, usc, exercise, and vend, within the United Kingdom of
Great Britain and Ireland, the Channel Islands, and Isle of Man, an Inven-
tion for "IMPROVEMENTS IN MARINE STEAM BOILERS," upon the condition
(amongst others) that I, the said Edward Humphrys, my executors or.
administrators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the nature of
the said Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six calen-
dar months next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Edward Humphrys, do bereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement thereof, reference being bad to the Drawings hereunto
annexed, that is to say:-
This Invention has for its object improvements in steam boilers, when such
boilers are employed to supply superheated steam, and consists in constructing
the uptake of the boiler in such a form as to render it suitable for the re-
ception of a number of vertical tubes, the uptake being part of the main boiler.
These vertical tubes being introduced serve as a superheating apparatus, and
render it unnecessary to employ any pipes or valves for conducting the steam
to such apparatus, and hence there is less liability to derangement.
Figure 1, Sheet 1, of the accompanying Drawings is a vertical section,
Figure 2, a longitudinal section, and Figure 3, a horizontal section of a boiler
.constructed according to my Invention; A is the furnace; B, B, are the

page_text: boiler tubes; C is the uptake in connection with the furnace by the smoke
box D; E, E, are vertical tubes placed in the uptake as shown, and through
which the products of combustion from the furnace pass; F is a passage lead-
ing from the boiler to the vertical tubes. Steam from the boiler passes down
the passage F, and circulating round the tubes E, becomes superheated
thereby, before passing to the ordinary steam pipe. The arrows indicate the
passage of the steam from the boiler to the vertical tubes.
Figure 4, Sheet 2, is a vertical section; Figure 5, a longitudinal section
and Figure 6, a horizontal section of a boiler constructed according to my
Invention, in which the superheating apparatus is placed in a line with or on
the same level as the furnace. This arrangement is particularly applicable to
boilers for ships of war; A, A, are the boiler tubes; B is the uptake in which
the vertical tubes C, C, are placed. D is a passage leading from the boiler to
the vertical tubes; E is a steam pipe leading to the engine; F is the smoke
box. Steam passes as in the former case from the boiler and becomes super-
heated while circulating round the vertical tubes by the products of combus-
tion passing through them to the chimney. The arrows indicate the course of
the steam in its passage from the boiler to the steam pipe.
And having now described the nature of my said Invention and in what
manner the same is to be performed, I declare that I claim as my improve-
ments in marine steam boilers, the construction of the uptakes of boilers in
the particular manner hereinbefore described and shewn in the accompanying
Drawings in order to admit of the introduction of vertical tubes placed so as to
allow the products of combustion to pass up through them while the steam
in its passage to the ordinary steam pipe passes round the outside of such
tubes.
In witness whereof, I, the said Edward Humphrys, have hereunto set
my hand and seal, this Tenth day of August, One thousand eight
Jundead and sint..
EDW. HUMPHRYS. (L.S.)