IMPROVEMENTS IN THE CONSTRUC- TION OF STEAM BOILERS AND OTHER APPARATUS FOR HEATING WATER OR SUPERHEATING STEAM, WHICH IMPROVEMENTS ARE ALSO APPLICABLE WHEN HEATING AIR
Year: 1858

page_text: LETTERS PATENT to John Greenwood, of Rawden, near Leeds, in the
County of York, for the Invention of "IMPROVEMENTS IN THE CONSTRUC-
TION OF STEAM BOILERS AND OTHER APPARATUS FOR HEATING WATER OR
SUPERHEATING STEAM, WHICH IMPROVEMENTS ARE ALSO APPLICABLE WHEN
HEATING AIR."
Sealed the 28th January 1859, and dated the 3rd August 1858.
PROVISIONAL SPECIFICATION left by the said John Greenwood at the
Office of the Commissioners of Patents, with his Petition, on the 3rd
August 1858.
I, JOHN GREENWOOD, of Rawden, near Leeds, in the County of York, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN THE
CONSTRUCTION OF STEAM BOILERS AND OTHER APPARATUS FOR HEATING WATER OR
SUPERHEATING STEAM, WHICH IMPROVEMENTS ARE ALSO APPLICABLE WHEN HEATING
AIR," to be as follows:-
The improvements have for their object the obtaining a greatly extended
heating surface. For this purpose I form the plates of the flues, or other
heating surfaces of boilers, or other apparatus for heating water, of plates with
deep'undulations, except at the parts thereof where the separate plates are
connected together, or to the angle iron by which they are held together;"
and I prefer that these undulations in the plates be to an extent such as to
double the heating surface thereof. 1 also form the flue spaces through
Price 8d.]

page_text: boilers or other water-heatingapparatus ofa deep undulatory form, in addition
to the plates thereof being of the undulating character referred to, in order
thereby to increase the beating surfaces thereof; and such undulating surfaces
are also applicable when forming chambers or surfaces for the superheating
steam, or the heating of air.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Greenwood in the Great Seal Patent Office on the
3rd February 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
GREENWOOD, of Rawden, near Leeds, in the County of York, send greeting
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Third day of August, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-second year of
Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said John Greenwood, Her special licence that I, the said
John Greenwood, my executors, administrators, and assigns, or such others
as I, the said John Greenwood, 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 THE CONSTRUCTION OF STEAM BOILERS AND OTHER APPARATUS
FOR HEATING WATER OR SUPERHEATING STEAM, WHICH IMPROVEMENTS ARE ALSO
APPLICABLE WHEN HEATING AIR," upon the condition (amongst others) that I,
the said John Greenwood, my executors or administrators, by an instrument.
in writing under my, or their, or one of their hands and seals, should par-
ticularly 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 Greenwood, 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:-
The improvements have for their object the obtaining a greatly extended
heating surface. For this purpose I form the plates of the flues, or other-

page_text: heating surfaces of boilers, or other apparatus for heating water of plates
with deep undulations, except at the parts thereof where the separate plates
are connected together, or to the angle iron by which they are held together;
and I prefer that these undulations in the plates be to an extent such as to
double the heating surface thereof. I also form the flue spaces through the
boilers or other water-heating apparatus of a deep undulatory form, in
addition to the plates thereof being of the undulating character referred
to, in order thereby to increase the heating surfaces thereof; and such
undulating surfaces. are also applicable when forming chambers or surfaces
for the superheating of steam, or the heating of air.
But that the nature of these my improvements, and the best means I am
acquainted with for carrying the same into effect may be fully understood,
I will proceed to describe the Drawing annexed.
DESCRIPTION OF THE DRAWING.
Figure 1 shews a vertical section; and Figure 2, a plan in section, of a
boiler, with my improvements in different forms applied thereto. In each
Figure the same letters are employed to indicate like parts wherever they
occur. In each modification of adaptation it is sought to obtain greatly
extended heating surface in relation to extent of space occupied, by
combining deep undulations over every part of the heating surface, except
at the junctions of the respective plates with a general undulatory surface.
In Figure 1, A and B shew two furnaces of the boiler, with the upper or
roof plates a, a, thereof combined together at b, b, so as to be of an undulatory
character apart from the undulations of which each plate is composed, by
which extent of heating surface is obtained; c, c, are stays, placed at intervals
for the purpose of giving steadiness to the parts. In the illustrations C and D
(the variations of which are better seen by the plan view, Figure 2,) the
undulations run in the direction of the length of the furnace; E, E, are the
flue spaces, formed undulatory, as shewn in their general character, in addition
to each undulation being composed of a series of smaller undulations. By
arranging these flue spaces closer together much greater heating surface may
be obtained than when employing series of tubes as flue passages, such as
generally employed in multitubular boilers. Such undulatory surfaces are
also applicable when forming chambers or surfaces for the superheating of
steain or other apparatus for heating water or the heating of air. Figures
3 and 4 shew two forms of tubes adapted for heating purposes.
Having thus described the nature of my said Invention, and the best means
I am acquainted with for carrying the same into effect, I would have it

page_text: understood that I do not confine myself to the precise details, or the par-
ticular character of boiler shewn and described, as these may be varied; but
what I do claim is the adaptation and combination of means to be employed
in the construction of steam boilers and other apparatus for heating water or
superheating steam, which improvements are also applicable when heating
air, as herein explained.
In witness whereof, I, the said John Greenwood, have hereunto set
my hand and seal, this Third day of February, in the year of our
Lord One thousand eight hundred and fifty-nine.
Witness,
WILLIAM BROOKES,
73, Chancery Lane, London,
Patent Agent.
JOHN GREENWOOD. (L.S.)