AN IMPROVED METHOD OF MAKING BOILERS TO BE USED IN MARINE STEAM ENGINES
Year: 1841

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
WHITEHOUSE, of Deptford, in the County of Kent, Engineer, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Twenty-fifth day of May, in the fourth year of Her. reign, did, for
Herself, Her heirs and successors, give and grant unto me, the said John
Whitehouse, Her especial licence; full power, sole privilege and authority,
that I, the said John Whitehouse, my exors, adñiors, and assigns, or such
others as I, the said John Whitehouse, my exors, admors, or assigns, should at
any time agree with, and no others, from time to time and at all times during
the term of years therein expressed, should and lawfully might make, use,
exercise, and vend, within England, Wales, and the Town of Berwick-upon-
Tweed, and also in all Her said Majesty's Colonies and Plantations abroad,
my Invention of "AN IMPROVED METHOD OF MAKING BOILERS TO BE USED IN MARINE
STEAM ENGINES;" in which said Letters Patent is contained a proviso that I,
the said John Whitehouse, shall cause a particular description of the nature
of my said Invention, and in what manner the same is to be performed, to be
inrolled in Her said Majesty's High Court of Chancery within six calendar
months next and immediately after the date of the said in part recited Letters
Patent, as in and by the same, reference being thereunto had, will more fully
and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
John Whitehouse, do hereby declare that the nature of my Invention, and the
manner in which the same is to, be performed, are fully described and ascer-.

page_text: tained in and by the following statement thereof, reference being had to the
Drawing hereunto annexed, and to the figures and letters marked thereon,
(that is to say):
My improved method of making boilers consists of forming steam boilers for
marine steam engines each in two compartments, one above the other, both com-
partments having a steam chest or chamber in which the steam is received;
at the same time the steam chest or chamber is so arranged as to be separated
from either of the two compartments, when from any cause either of the two
compartments of which the boiler is composed may be required to be put out
of work, and the two sets of furnaces for the respective compartments have
their separate flues, the two compartments being independent of each other in
respect to the water spaces. And in order that my Invention may be most
fully understood and readily carried into effect, I will proceed to describe the
Drawing hereunto annexed, in which the same letters of reference are used to
indicate similar parts wherever they occur.
DESCRIPTION OF THE DRAWING.
Figure 1 represents a plan in section of the upper compartment of a steam
boiler constructed according to my Invention, there being three sets of the
fire bars shewn in their places, the other three sets of fire bars not being
shewn; each compartment of the boiler shewn in the Drawing having six
furnaces, but that number may be varied. Figure 2 shews a section of a steam
boiler taken from front to back at the point A, A, of Figure 1, as is indicated
by the red line thereon. Figure 3 is another section taken near the front
of the boiler. Figure 4 is a plan of the under side of the steam chest or
chamber. C is the lower compartment of the boiler, which, in respect to the
flues and water spaces, is for the most part similar to the upper compartment D,
as shewn in Figure 1. I would, however, remark, that I make no claim to
the arrangement of the water spaces and flues, as shewn, nor do I confine
myself thereto, as they may be varied according to the judgment of the boiler
maker, such flues and water spaces forming no part of my Invention, and,
separately considered, are very similar to other marine boilers which have been
before used. E is the plate which divides the upper from the lower compartment
of the boiler; F, F, are the steamways from the lower compartment C of the
boiler into the steam chest or chamber G, there being valves H, II, by which the
steamways F, F, into the steam chest G may be closed, when from any cause
it is desired to put the lower compartment C of the boiler out of work, without
interfering with the working of the upper compartment D of the boiler, as will
readily be understood on examining the Drawing. The steam from the upper

page_text: compartment D of the boiler passes through the valves I, I, into the steam
chest or chamber G, the valves being used to close the passages from the
upper compartment of the boiler into the steam chest or chamber G, when it
is desired to put the upper compartment of the boiler out of work without
interfering with the working of the lower compartment C of the boiler.
J, J, are the steam pipes from the steam chest G to the engines; and it will
be understood that when both compartments of the boiler are at work, the
four valves should be kept raised fully off their seats. The arrows point out
the direction of the flame, heated air, and smoke from the furnaces into tho
funnel or chimney K, but it will be seen that the flues of one compartment do
not interfere with the flues of the other compartment, which is important to
the Invention, and the products from the furnaces of the upper and lower
compartments do not come together till the products (flame, heated air, and
smoke) of both arrive above the point L, as will readily be traced on examining
Figure 2 of the Drawing. M, M, are the furnaces of the lower compartment
C of the boiler, and N, N, are the furnaces of the upper compartment D of
the boiler. It will therefore be seen that the two compartments are one above
the other, and work as if they were two separate boilers, having a common
steam chest, the plate or partition E forming the bottom of one boiler and the
top of the other. The Drawing clearly shews the manner of constructing a
boiler with the requisite stays or braces, all which is well understood by boiler
makers, and will not require description in this my Specification. It should
be stated that there will require to be a platform in front of the boilers for the
fireman to stand on when attending to the upper fires.
Having thus described the nature of my Invention, and the manner in which
the same is to be performed, I would remark, that by the use of such boilers
much space will be saved in large steam vessels. And I would have it under-
stood that what I claim as the Invention secured by the above recited Letters
Patent is, the improved method of making boilers for marine steam engines,
whereby one compartment is placed over another with separate furnaces and
fireplaces, such compartments having communication with a common steam
chest, and each compartment capable of being separated from the steam chest
without interfering with the working of the other of the compartments, as
herein described.
In witness whereof, I, the said John Whitehouse, have hereunto set
my hand and seal, this Third day of November, in the year of our Lord
One thousand eight hundred and forty-one.

page_text: AND BE IT REMEMBERED, that on the Third day of November, in the
year of our Lord 1841, the aforesaid John Whitehouse came before our said
Lady the Queen in Her Chancery, and acknowledged the Specification afore-
said, and all and every thing therein contained and specified, in form above
written. And also the Specification aforesaid was stamped according to the
tenor of the Statute made for that purpose.
Inrolled the Twenty-fifth day of November, in the year of our Lord One
thousand eight hundred and forty-one.