IMPROVEMENTS IN GEnerating Steam in LOCOMOTIVE AND OTHER STEAM BOILERS
Year: 1874

page_text: LETTERS PATENT to the Hon. John W. Plunkett, of Dunsany Castle,
Ireland, for the Invention of “IMPROVEMENTS IN GEnerating Steam in
LOCOMOTIVE AND OTHER STEAM BOILERS."
Sealed the 21st December 1874, and dated the 27th June 1874.
i1.
PROVISIONAL SPECIFICATION left by the said Hon
John W.
Plunkett at the Office of the Commissioners of Patents, with bis
Petition, on the 27th June 1874.
1
I, the Hon. JOHN W. PLUNKETT, of Dunsany Castle, Ireland, do
5 hereby declare the nature of the said Invention for: "IMPROVEMENTS IN
GENERATING STEAM IN LOCOMOTIVE AND OTHER STEAM BOILERS," to be as
follows:-
.1
My Invention of improvements in generating steam in locomotive and
other steam boilers consists in the use of an auxiliary stcam jet in such a
0-manner-as-to-ensure-a-proper-motion-along-or-through-the-boiler-of-the
_heated gases.from-the-furnace,-and-prevent-any-loss-of-heat-by-escape
from the furnace doors, while at the same time it promotes circulation
of the water, and enables it to take up caloric more rapidly by intro-

page_text: ducing a jet of steam from a branch of the samo steam pipe directly into
the water about to be heated.
In ordinary boilers, whether locomotive or stationary, when the fire is
lighted in the furnace part of the heated gases traverse the tubes or
flues, and generato steam in the boiler, but a great portion of the heat
escapes from the furnace doors, and is not only lost but injures in
passing the gauges and taps on the boiler ends, and also makes uncom-
fortably hot the places where the firemen stand and work. To prevent
this loss and inconvenience I introduce a jet of steam through a pipe
from a separate boiler into the funnel, chimney, or flue of the boiler in
which steam is required to be raised, which causes or induces the whole
of the heated gases to pass through the flues or tubes of the boiler, and
up the chimney, by which means an increased draught is obtained, and
all the heated gases are compelled to pass through or alongside the boiler,
and none allowed to escape.
-
In combination with the above mode I also introduce through a
branch of the above-mentioned steam pipe from the separate boiler a jet
of steam directly into the water required to be converted into steam.
This branch pipe is passed through the bottom plates of the boiler. The
advantages of this arrangement are that the jet of steam increases the 2
circulation of the water, enabling it more rapidly to take up caloric
from the plates, and also imparts to the water a greater quantity of
caloric in a given time than the water could extract from any other
agent, steam imparting heat to water more readily than heated plates.
Morcover as heat is imparted directly to the inside of the boiler, while 2
the fire is applied to the outside, the unequal expansion of the plates
and flues is prevented.
My Invention will be found very serviceable in connection with
marine boilers, as by its adoption steam may be got up more speedily
than could otherwise be done, thereby enabling a war vessel to obtain 3
an advantage over an opponent in point of time, and to be manœuvred
more speedily, from which the most important consequences might flow
in naval engagements.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Hon. John W. Plunkett in the Great Seal
Patent Office on the 26th December 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, tho
Hon JOHN W. PLUNKETT, of Dunsany Castle, Ireland, sond
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-seventh day of June, in the
year of our Lord One thousand eight hundred and seventy-four, in tho
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said John W. Plunkett, Her special
license that I, the said John W. Plunkett, my executors, administrators,
and assigns, or such others as I, the said John W. Plunkett, 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 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 GENERATING STEAM IN LOCOMOTIVE AND OTHER STEAM BOILERS," upon the
condition (amongst others) that I, the said John W. Plunkett, 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 imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said John W. Plunkett, do hereby declaro.
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, that is to say :—
My Invention of improvements in generating steam in locomotive and
other steam boilers consists in the use of an auxiliary steam jet in sucli a
manner as to ensure a proper motion along or through the boiler of the
heated gases from the furnace, and prevent any loss of heat by escapo
from the furnace doors, while at the same time it promotes circulation
of the water, and enables it to take up caloric more rapidly by intro-

page_text: ducing a jet of steam from a branch of the same steam pipo directly into
the water about to be heated.
In ordinary boilers, whether locomotive or stationary, when the fire is
lighted in the furnace a portion of the heated gases traverses the tubes
or flucs, and generates steam in the boiler, but a great portion of tho t
heat escapes from the furnace doors, and is not only lost but injures in
passing the guages and taps on the boiler end, and also makes uncom-
fortably hot the places where firemen stand and work. To prevent this
loss and inconvenience I introduce a jet of steam through a pipe from a
separate boiler into the funnel, chimney, or fluo of the boiler in which 1
steam is required to be raised, which causes or induces the whole of the
licated gases to pass through the flues or tubes of the boiler, and up the
chimney, by which means an increased draught is obtained, and all tho
heated gases are compelled to pass through or alongside the boiler, and
none allowed to escape.
1
In combination with the above modo I also introduce through a
branch of the above-mentioned steam pipe a jet of steam into the water
required to be converted into steam. This branch pipe enters the boiler
through the bottom or side plates, and that part of the pipe in contact
with the water is perforated along its length, so that a series of small
jets of steam issue directly into the water. The advantages of this
arrangement are that the steam jets increase the circulation of tho
water, enabling it more rapidly to take up caloric from the plates, and
also imparts to the water a greater quantity of caloric in a given time
than the water could extract from any other agent, steam imparting a
heat to water more readily than heated plates. Morcover as heat is
imparted directly to the inside of the boiler, while the fire is applied
to the outside, the unequal expansion of the plates and flues is
prevented.
The above-mentioned pipe and branch are fitted to the boiler in
which steam is to be raised. The outer end of the pipo is furnished
with a tap and joint for attachment to the end of a pipe connected to a
boiler from which the auxiliary steam is to be drawn. The connection
between the two boilers can be readily effected and easily disengaged.
Taps are also inserted at the junction between the branch and side pipe,
so that the passage of steam through either can be regulated or stopped,
and to prevent the water in the boiler from running out when the steam
is turned off.

page_text: My Invention will be found very serviceable in connection with
marine boilers, as by its adoption steam may be got up more speedily than
could otherwise be done, tliereby enabling a war vessel to obtain an
advantage over an opponent in point of time, and to be manouvered
more readily, from which the most important consequences might flow
in marine engagements.
'
And in order that my Invention may be better understood; and more
readily put into operation; I will now proceed to describe the Sheet of
Drawings hereunto annexed, shewing my Invention applied to a locomo-
tivo boiler, and taking steam from an auxiliary stationary boiler.
A similar arrangement can of course be applied to stationary or
marine boilers, and the details of construction may in either case be
varied without departing from the principle of my Invention; and
either of the arrangements horein-before described may be used in con-
junction or independently of each other.
A is the end clevation of the auxiliary boiler from which steam is to
be taken; B, the steam dome of this boiler; C, the pipe (flexible or
otherwise as most convenient) through which steam passes to the pipe
in connection with the boiler in which steam is to be raised; D, a
locomotive boiler having fire-box E at one end and smoke box F at the
other end, terminating in the funnel H; K, K, a pipe connected by
joint and tap with auxiliary pipo O, and passing into the funnel H,
where it ends with a nozzle through which a jet of steam issues, and
passes up the funnel to increase the draught; L, L, L, a branch pipe
passing into the boiler, and perforated along its length, as shewn, to
allow the steam to pass directly into the water, either of these pipcs
being closed to the other as required.
Having now particularly described and ascertained the nature of my
said Invention, and how the same is to be carried into practical operation
I would have it understood that what I claim and desire to secure in the
herein-before in part recited Letters Patent is,-
Firstly. The construction and use of a steam pipe for introducing
steam from an auxiliary boiler into the furnace, funnel, or flue of another
boiler to increase the draught, as herein-before described and illustrated
by the accompanying-Drawings.
And, Secondly. The construction and use of a steam pipe cither
separatoly or in connection with my other steam pipo passing through

page_text: the boiler plates for the purpose of taking steam from an auxiliary boiler
directly into the boiler requiring steam to be raised, as herein-before.
described and illustrated by the accompanying Drawings.
In witness whereof, I, the said John W. Plunkett, have horcunto
.
set my hand and scal, this Twenty-sixth day of December, in 5
•
the year of our Lord One thousand eight hundred and soventy-
four.
JOHN WLILIAM PLUNKETT. (L.S.)