A NEW OR IMPROVED METHOD OF ECONOMISING FUEL BY REGULATING THE HEAT IN THE DATES"
Year: 1874

page_text: LETTERS PATENT to Joseph Saul, of Derby, in the County of Derby,
Furnace Builder, and Holmes Hird, of Burton-on-Trent, in the
County of Stafford, Engineer, for the Invention of "A NEW OR
IMPROVED METHOD OF ECONOMISING FUEL BY REGULATING THE HEAT IN THE
DATES"
PROVISIONAL SPECIFICATION left by the said Joseph Saul and
Holmes Hird at the Office of the Commissioners of Patents, with,
their Petition, on the 28th February 1874.
We, JOSEPH SAUL, of Derby, in the County of Derby, Furnace Builder,
and HOLMES HIRD, of Burton-on-Trent, in the County of Stafford,
Engineer, do hereby declare the nature of the said Invention for "A
NEW OR IMPROVED METHOD OF ECONOMISING FUEL BY REGULATING THE HEAT IN
THE TUBES OF TUBULAR STEAM BOILERS," to be as follows:-
This Invention relates to Lancashire. Cornish, and other tubular steam

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Joseph Saul and Holmes Hird in the Great Seal
Patent Office on the 26th August 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOSEPH 3
SAUL, of Derby, in the County of Derby, Furnace Builder, and HOLMES

page_text: HIRD, of Burton-on-Trent, in the County of Stafford, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-eighth day of February, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said Joseph Saul and Holmes Hird,
Her special license that we, the said Joseph Saul and Holmes Hird,
our executors, administrators, and assigns, or such others as we, the
said Joseph Saul and Holmes Hird, our 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 "A NEW OR IMPROVED METHOD OF ECONOMISING FUEL
BY REGULATING THE HEAT IN THE TUBES OF TUBULAR STEAM BOILERS," upon the
condition (amongst others) that we, the said Joseph Saul and Holmes
Hird, our executors or administrators, by an instrument in writing
under our, 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 Scal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
"
NOW KNOW. YE, that we, the said Joseph Saul and Holmes Hird,
do hereby 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, that is to say :—
This Invention relates to Lancashire, Cornish, and other tubular steam
boilers, and has for its object to economise fuel by directing the flame.
and heated gases from the furnace so as to compel them to impinge on
the whole inner surface of the tube, and thus cause the heat to be more
readily and completely absorbed than heretofore.
In order that our said Invention may be more casily and more fully.
understood and be more readily performed, we now proceed to explain'
the same with the aid of the accompanying Drawing which forms part
of this Specification, reference being made thereto by the numerals and"

page_text: letters marked thereon, and which reference applies to each Figure of
the said Drawing, where the same index numerals and letters appear.
Figure 1 is a longitudinal section of a tubular steam boiler, shewing.
our improved cone with a cylindrical base fixed in position.
Figure 2 is a transverse section of the said boiler, shewing a front view
of the said cone as fixed.
About eighteen inches or thereabouts from the rear or back end of the
boiler tube or tubular space, and within such tube, we place or fix a cone
or a cone with a cylindrical base a made of fire-brick, fire-clay, or other
fire-resisting material, and of such size or diameter as will leave a space c
between the base of the cone and the inside of the tube of from three to
six inches (more or less), varying according to the setting of the boiler
and the available draught. The said cone may be made in one or more
parts or pieces, as is most convenient, and may be either solid or hollow.
The cone is fixed in the tube with the apex thereof placed towards the
front or furnace end of the boiler. The said cone is by preference sup-
ported and maintained in position by about three supports b, as shewn,
or it may be secured in any other convenient and efficient manner.
In long boilers another similar cone may be fixed at about four feet
(more or less) beyond the back of the furnace bridge d.
Our improved method of preventing the heat escaping unutilized
through the centre of the boiler tube and of diffusing such heat over a
larger surface has the effect of economising fuel and preventing the
flame from acting too strongly on any particular part of the boiler, and
thereby obtaining a more equal expansion of the several iron plates
forming the inside of the tube, which prevents or avoids the evils arising
from the unequal and irregular expansion and contraction of such iron
plates by the present system.
This improved and economical arrangement can be fixed in about two
hours in any tubular steam boiler, and it is estimated to effect a saving
of from 8 to 12 per cent. of the quantity of fuel at present consumed
in the furnaces of such boilers.
Having thus fully described the nature of our said Invention and the
method of performing the same, we claim as our Invention and desire

page_text: to secure by the before-mentioned in part recited Letters Patent the
method of regulating and directing the heat in the tubes of tubular
steam boilers, substantially as and for the purposes herein described and
shewn in the Drawing.
In witness whereof, we, the said Joseph Saul and Holmes Hird
have hereunto set our hands and seals, this Twenty-fourth day
of August, in the year of our Lord One thousand eight hundred
and seventy-four.
steam boilers, substantially as and for the purposes uerein described and
hewn in the Drawing.
In witness whereof, we, the said Joseph Saul and Holmes Hird
have hereunto set our hands and seals, this Twenty-fourth day
of August, in the year of our Lord One thousand eight hundred
and seventy-four.
JOSEPH SAUL.
(L.S.)
HOLMES HIRD. (L.S.)