IMPROVEMENTS IN STEAM BOILERS OR GENERATORS.
Year: 1870

page_text: LETTERS PATENT to James Stead Crosland, of the City of Manchester,
in the County of Lancaster, Engineer, for the Invention of
"IMPROVEMENTS IN STEAM BOILERS OR GENERATORS.'
,,
Sealed the 15th April 1871, and dated the 27th October 1870.
PROVISIONAL SPECIFICATION left by the said James Stead Crosland
at the Office of the Commissioners of Patents, with his Petition,
on the 27th October 1870.
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
My improvements relate to combinations and arrangements of two or
more cylindrical boilers placed one over the other, and connected by
parallel or cylindrical tubes, as described in the Specification of my
Patent, No. 2083, dated the Tenth day of July, A.D. 1869.

page_text: The object of my Invention is to give free scope for the steam
generated in the lower boiler or boilers and upon the sides of the con-
necting tubes to ascend clear of the sides of the tubes, so that the
cooler portion of the water may come in closer contact with the
sides of the tubes to keep down their temperature by absorbing
the heat more rapidly, and by this means the metal will be less liable
to become burnt or deteriorated; and, furthermore, the object of my
Invention is to promote a more rapid and perfect circulation through the
said tubes.
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 April 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
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 Twenty-seventh day of October, in the
year of our Lord One thousand eight hundred and seventy, in the
thirty-fourth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said James Stead Crosland, Her
special license, that I, the said James Stead Crosland, my executors,
administrators, 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 there-
after during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain

page_text: necting or descending tubes to form a partition between the ascending
and descending currents, and thereby causing a more perfect circulation
of the fluids.
Fig. 1 is a longitudinal section; Fig. 2, a plan section; Fig. 3, a cross
section at A, B, Fig. 1, looking from the furnace end; and Fig. 4 is a
cross section at C, D, Fig. 1, of one combination and arrangement of
boiler according to my Invention.
a is the upper cylindrical boiler; 6, the lower boiler, supported on iron
frames; c, d, are the conical connecting tubes, any one of which can be
removed or replaced without disturbing the other tubes; e is the
furnace; the gases from the furnace pass along the under side of the
upper boiler (a) and between the upper part of the connecting tubes (d),
then along and over the upper part of the lower boiler (b) and between
the lower part of the connecting tubes, then under the lower boiler to
the chimney; fare doors by which access is obtained to the flues; and
g is the damper.
Fig. 5 is a longitudinal section, and Fig. 6 a cross section of the other
combination and arrangement according to my Invention.
a is a cylindrical boiler having descending conical tubes d, which are
connected by branch pipes d¹ with one central pipe (/) for drawing
off sediment or deposit, and through which the feed water enters.
The flue in this case passes directly from the furnace along the under
side of the boiler and between the descending conical tubes (d) to the
chimney. In both boilers the conical connecting or descending tubes
have or may have central partition tubes / suspended or fixed in them,
as shewn.
I have now particularly described the nature of my Invention and the
mode of carrying it into effect, and claim as my Invention the com-
bination and arrangement of two or more cylinders or boilers connected
by conical water tubes d with the fire under the upper boiler and the
feed water entering the lower boiler, and also the partition tubes (k)
in combination therewith, substantially as herein-before described and
illustrated by Figs. 1, 2, 3, and 4 of the Drawings.
I also claim the combination and arrangement of a cylindrical boiler
and descending conical water tubes, and also the partition tubes k
combined therewith, substantially as described and shewn by Figs. 5
and 6 of the Drawings.

page_text: I also claim connecting the conical descending tubes d by a pipe (h),
s shewn in Figs. 5 and 6 of the Drawings.
In witness whereof, I, the said James Stead Crosland, have hereunto
set my hand and seal, this Twenty-second day of April, in the
year of our Lord One thousand eight hundred and seventy-one.
J. S. CROSLAND. (L.S.)