IMPROVEMENTS IN HEATING THE FEED WATER OF STEAM BOILERS FOR MARINE AND LAND PURPOSES
Year: 1856

page_text: LETTERS PATENT to John Smith, of Kirtley, in the County of Suffolk,
Engineer, for the Invention of "IMPROVEMENTS IN HEATING THE FEED
WATER OF STEAM BOILERS FOR MARINE AND LAND PURPOSES."
Sealed the 3rd April 1857, and dated the 17th October 1856.
PROVISIONAL SPECIFICATION left by the said John Smith at the Office'
of the Commissioners of Patents, with his Petition, on the 17th October
1856.
I, JOHN SMITH, of Kirtley, in the County of Suffolk, Engineer, do hereby
declare the nature of the Invention for "IMPROVEMENTS IN HEATING THE FEED
WATER OF STEAM BOILERS FOR MARINE AND LAND PURPOSES," to be as follows:-
This Invention consists in heating the feed water of steam boilers by passing
the flue of the furnace through the cistern in which the feed water is contained;
and in order to increase the surface of the flue inside the cistern, the flue is
constructed of a series of metal tubes, which pass through it as the tubes pass
through a locomotive or other tubular boiler; and the cistern is furnished with
partitions, which divide the cistern into several chambers, through all of which
the water is obliged to circulate before it enters the boiler.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Smith in the Great Seal Patent Office on the
17th April 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
SMITH, of Kirtley, in the County of Suffolk, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventeenth day of October, in the year of our
Lord One thousand eight hundred and fifty-six, in the twentieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said John Smith, Her special licence that I, the said John Smith, my
executors, administrators, and assigns, or such others as I, the said John
Smith, 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 HEATING THE
FEED WATER OF STEAM BOILERS FOR MARINE AND LAND PURPOSES," upon the
condition (amongst others) that I, the said John Smith, 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 John Smith, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say:-
This Invention consists in heating the feed water of steam boilers by passing
the flue of the furnace through the cistern in which the feed water is contained;
and in order to increase the surface of the flue inside the cistern, the flue is
constructed of a series of metal tubes, which pass through it as the tubes pass
through a locomotive or other tubular boiler; and the cistern is furnished with
partitions, which divide the cistern into several chambers, through all of which
the water is obliged to circulate before it enters the boiler.
And in order that my said Invention may be most fully understood and
readily carried into effect, I will proceed to describe the Drawings hereunto
annexed.

page_text: DESCRIPTION OF THE DRAWINGS.
Figure 1 is a longitudinal section, and Figure 2 is a plan, in section, of a
steam boiler, with apparatus for heating the feed water arranged according to
my Invention. a, a, is the boiler; and b is the cistern for receiving the feed
water before it passes into the boiler; b', 6', are tubes passing through the
cistern b, and which serve as flues for the furnace of the boiler a; c is a pipe,
through which water is forced by the feed pump into the cistern b; and dis
another pipe by which the water passes from the cistern 6 into the boiler a. A
transverse section of the cistern b is shewn at Figure 3, and in this view the
partitions 6 for causing the circulation of the water in the cistern are clearly
seen; e, e, are blow-off pipes for keeping the cistern free from sediment. By
causing in this way the flue of the boiler to pass through a cistern containing
the feed water, heat, which otherwise would escape uselessly by the chimney,
is communicated to the feed water, and a saving of fuel is effected.
Figure 4 is a longitudinal section of the apparatus as adapted to a marine
boiler. is the steam chest of the boiler, and g is the take-up or flue of the
boiler furnace passing through the steam chest f to the cistern h, which has
tubular flues through it; i is the chimney or funnel placed over the cistern
h; k is a pipe by which water is forced by the feed pump into the cistern;
1 is another pipe by which it escapes therefrom to the boiler; and m is a
blow-off pipe for clearing the cistern of sediment.
In witness whereof, I, the said John Smith, have hereunto set my hand
and seal, this Seventeenth day of April, in the year of our Lord One
thousand eight hundred and fifty-seven.
Witness,
JNO. ALCOCK.
JOHN SMITH. (L.S.)