PROVEMENTS IN STEAM BOILERS OR GENERATORS
Year: 1873

page_text: LETTERS PATENT to James Stead Crosland, of the City of Manchester,
• IM-
in the County of Lancaster, Engineer, for the Invention of
PROVEMENTS IN STEAM BOILERS OR GENERATORS.”
Sealed the 9th September 1873, and dated the 4th April 1873.
PROVISIONAL SPECIFICATION left by the said James Stead Crosland
at the Office of the Commissioners of Patents, with his Petition,
on the 4th April 1873.
I, JAMES STEAD CROSLAND, of the City of Manchester, in the County
of Lancaster, Engineer, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN STEAM BOILERS OR GENERATORS," to be as
follows:-
These improvements consist in forming or placing one or two furnaces
and fires with one or two flues, within either the upper or lower boilers
of those boilers or generators as specified in the several Letters Patent
granted to me numbered and dated respectively No. 2083, A.D. 1869;
No. 2818, A.D. 1870; No. 2749, A.D. 1871; No. 1962, A.D. 1872; and
No, 3310, A.D. 1872,

page_text: And my improvements consist in applying the conical or parallel tubes
connected to an upper or lower boiler or generator, as shown and
described in my said several Letters Patent, and placing and connecting
the same to a single or double flue boiler, and which single or double
flue boiler may contain conical, parallel, or horizontal tubes as may be t
desired.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Stead Crosland in the Great Seal Patent
Office on the 26th September 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES 1
STEAD CROSLAND, of the City of Manchester, in the County of Lancaster,
Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourth day of April, in the year
of our Lord One thousand eight hundred and seventy-three, in the 1
thirty-sixth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said James Stead Crosland, Her special
license that I, the said James Stead Crosland, my executors, adminis-
trators, and assigns, or such others as I, the said James Stead Crosland,
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 "IM-
PROVEMENTS IN STEAM BOILERS OR GENERATORS," upon the condition (amongst
others) that I, the said James Stead Crosland, by an instrument in writing
under my hand and seal, 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 James Stead Crosland, do hereby
declare the nature of my said Invention, and in what manner the
3

page_text: in and by the following statement and the accompanying Drawings
(that is to say):-
My improvements in steam boilers or generators consist of com-
binations and arrangements which are illustrated by the accompanying
Sheet of Drawings, in which Fig. 1 is a longitudinal section, and Figs. 2
and 3 cross sections of one modification according to my Invention, and
Fig. 4 is a longitudinal section, and Fig. 5 a cross section of another
modification according to my Invention.
The modification shown by Figs. 1, 2, and 3 has a single internal flue
in the upper boiler, and the modification shewn by Figs. 4 and 5 has
two internal flues in the upper boiler, in other respects the two modi-
fications are alike. a, the upper cylinder or boiler, which in one
modification has a single and in the other a double internal flue b
through it. These flues 6 may be simple flues, as shown in Fig. 3, or
they may have conical tubes c, as shown, or parallel or other tubes
arranged as desired. d is a lower cylinder or boiler connected with the
upper boiler a by conical tubes e, as shown, or by parallel tubes arranged
as illustrated by the Drawings; f, is the furnace or furnaces; g, the fire-
bridge. The flame and gases, after passing through the flue or flues 6 in
the upper cylinder a, returns under the upper cylinder a, and over the
lower boiler or cylinder d, then under the latter to the chimney; h, being
the damper; i, the brickwork in which the boiler is set; and j, frames
or stands which support the boiler.
I have now particularly described the nature of my Invention and the
mode of carrying the same into effect, and claim as my Invention, the
combination of a cylinder or boiler (a) having one or more internal flues
6 in it, with a lower boiler d, substantially as herein-before described and
illustrated by the accompanying Drawings.
In witness whereof, I, the said James Stead Crosland, have here-
unto unto set my hand and seal, this Twenty-fifth day of Sep-
tember, in the year of our Lord One thousand eight hundred and
seventy-three.