IMPROVEMENTS IN MARINE AND OTHER STEAM BOILERS WITH REFERENCE TO ECONOMY OF FUEL
Year: 1861

page_text: LETTERS PATENT to Patrick O'Hanlon, of Nile Street, in the Town and
County of the Town of Kingston-upon-Hull, Boiler Maker, for the
Invention of "IMPROVEMENTS IN MARINE AND OTHER STEAM BOILERS WITH
REFERENCE TO ECONOMY OF FUEL."
PROVISIONAL SPECIFICATION left by the said Patrick O'Hanlon at the
Office of the Commissioners of Patents, with his Petition, on the 3rd
August 1861.
I, PATRICK O'HANLON, of Nile Street, in the Town and County of the Town
of Kingston-upon-Hull, Boiler Maker, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN MARINE AND OTHER STEAM BOILERS WITH
REFERENCE TO ECONOMY OF FUEL," to be as follows:-
The improvements herein-after described are especially applicable to my
improved marine and other boilers, for which Letters Patent have been
granted to me provisionally, No. 1463, bearing date June 8, 1861, but may
also be adapted to other descriptions of boilers. The economical consumption
of fuel to which this Patent relates, I propose to effect by two means,
namely, on the one part by causing, through mechanical and artificial
contrivances, a more perfect combustion; and on the other part, by conducting
the water for feeding the boiler in such a manner through the flues as to

page_text: become thoroughly heated, but without abstracting by such process any heat
which would otherwise have contributed to the heating of the boiler.
In order to effect the first part of these improvements, namely, a saving of
fuel, by a more complete and regular combustion, I introduce into the mouth
of each of the intermediary large flues or tubes (situated above the respective
fire boxes, and connected with these by a series of smaller tubes, as described
in my Patent herein-before mentioned) a kind of fan or exhaustor, which, by
virtue of the air or gases becoming more rarified on the one side than on the
other by the heat, will rotate, and by so doing transmit the smoke in a regular
manner into the smoke box of the boiler. These fans will consist of a series
of blades fixed to a spindle passing through the ends of the flues or tubes,
where, joining the smoke chamber, their form will be adapted to the
circular shape of these flues.
With respect-to-the second part of this Invention, I propose to omit the
fans (above described) in the two intermediary tubes or flues, which are
respectively situated the nearest to the sides of the boiler, and introduce, in lieu
of them, the feed pipe, which being of a smaller diameter would leave space
enough for the smoke and gases to pass into the smoke chamber. The
course the feed pipe takes is therefore the following, first, it enters the boiler
at the front, passes through the wing-tube-before-mentioned at one side,
traverses the smoke chamber at the back, and repasses finally through the other
wing tube at the opposite side again to the front of the boiler, where, with a
bend and a valve or cock, it is in communication with the water space.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Patrick O'Hanlon in the Great Seal Patent Office on the 2
30th Janary 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PATRICK .
O'HANLON. of Nile Street, in the Town and County of the Town of Kingston-
upon-Hull, Boiler Maker, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters 3
Patent, bearing date the Third day of August, in the year of our Lord One
thousand eight hundred and sixty-one, in the twenty-fourth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Patrick O'Hanlon, Her special licence that I, the said Patrick O'Hanlon,
my executors, administrators, and assigns, or such others as .I, the said 3
Patrick O'Hanlon, my executors, administrators, and assigns, should at any time

page_text: upon
agree with; and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
MARINE AND OTHER STEAM BOILERS WITH REFERENCE TO ECONOMY OF FUEL,"
the condition (amongst others) that I, the said Patrick O'Hanlon, 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 calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said Patrick O'Hanlon, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the follow-
ing statement, that is to say :-
The improvements herein-after described are especially applicable to my
improved marine and other boilers, to which Letters Patent have been
granted to me, Number One thousand four hundred and sixty-three, bearing
date the Eighth day of June One thousand eight hundred and sixty-one, but
may also be adapted to other descriptions of boilers. The economical
consumption of fuel to which this Patent relates, I propose to effect by two
means, namely, on the one part, by causing through mechanical and artificial
contrivances a more perfect combustion; and on the other part, by conducting
the water for feeding the boiler in such a manner through the flues as to become
thoroughly heated, but without abstracting by such process any heat which
would otherwise have contributed to the heating of the boiler.
In order to effect the first part of my improvements, namely, a saving of
fuel by a more complete and regular combustion, I introduce into the mouth
of each of the intermediary large tubes or flues, (situated above the respective
fire boxes, and connected with these by a series of smaller tubes as described in
my Patent herein-before mentioned,) a kind of fan or exhauster, which, by
virtue of the air or gases becoming more rarified on the one side than on the
other by the heat, will rotate, and by so doing transmit the smoke in a
regular manner into the smoke box of the boiler. These fans will consist of a
series of blades fixed to a spindle passing through the ends of the flues or tubes
where, joining the smoke chamber, their form will be adapted to the circular
shape of these flues. When the fans are inserted in the intermediary large
tubes, the mouth, of each large tube will be closed, with the exception of

page_text: leaving an opening on the bottom of each tube for the purpose of admitting
air for the rotation of the fans. The size of this opening may be varied at
the discretion of the engineer.
With respect to the second part of this Invention, I propose to omit the
fans (above described) in the two intermediary tubes or flues which are
respectively situated the nearest to the sides of the boiler, and introduce, in lieu
of them, the feed pipe, which, being of a smaller diameter, would leave space
enough for the smoke and gases to pass into the smoke chamber. The course
the feed pipe takes is, therefore, the following:-First, it enters the boiler at the
front, passes through the wing tube before mentioned at one side, traverses
the smoke chamber at the back, and repasses finally through the other wing
tube at the opposite side again to the front of the boiler, where with a bend
and a valve or cock it is in communication with the water space.
For the purpose of more fully and clearly explaining and ascertaining the
nature of my Invention, and the manner in which the same is effected, I
append to this Specification a Sheet of Drawings, having figures and letters
of reference marked thereupon, similar letters being used to denote corre-
sponding parts in each Figure.
In the Drawings, Figure 1 is a cross section of an ordinary marine tubular
boiler, shewing the intermediary large tubes F, F, herein-before referred to
(in-which-the-fans-or-exhausters, Figures-2-and-3-are--placed,) and-also-the-
smaller vertical or inclined tubes connecting each large tube with its respective
fire-box. Figures 2 and 3 are enlarged views, showing the construction of the
fans or exhausters I propose to employ. Figure 4 is a sectional plan of the
boiler across the large intermediary tubes, showing the application and position
of the feed pipe P, as herein-before mentioned, which enters the wing tube
denoted in this Figure by the letter A, passing along, and from which it
crosses, the combustion chamber to the opposite wing or large tube, which the
said feed pipe enters, and passing through it returns to the front of the boiler
and is connected with the water space by the valve or cock C. Figure 5
shews the feed pipe P, as I propose to introduce it in that description of
boiler known as the Cornish boiler, of which this Figure is a sectional plan,
the improvements of my former Patent, herein-before mentioned, having been
however introduced into this boiler.
Having now described and ascertained the nature of my Invention, and
shown the manner in which the same is effected, I wish it to be understood
that I do not claim the introduction or application of a fan in the furnace of
a boiler, but what I claim is,-
Firstly, the application of a fan or exhauster substantially as in this

page_text: Specification and appended Drawing set forth and shewn for the purposes
herein described.
And, secondly, the construction and application of a feed pipe in the
manner and for the purpose herein (in this Specification and Drawing hereto
appended) described and set forth.
In witness whereof, I, the said Patrick O'Hanlon, have hereunto set my
hand and seal, this Twenty-ninth day of January One thousand eight
hundred and sixty-two.
Signed, sealed, and delivered by the
said Patrick O'Hanlon, in the
presence of
FRAS. SUMMERS,
Sol. Hull.
LEON. HEWITT,
his Clerk.
PATRICK O'HANLON. (L.S.)