IM- PROVEMENTS IN STATIONARY AND MARINE STEAM BOILERS OR GENFRAZADO " PROVEMENTS IN STATIONARY AND MARINE Steam Bollers or GenerATODSERATOR
Year: 1872

page_text: LETTERS PATENT to James Stead Crosland, of the City of Manchester,
in the County of Lancaster, Engineer, for the Invention of "IM-
PROVEMENTS IN STATIONARY AND MARINE STEAM BOILERS OR GENFRAZADO "
PROVEMENTS IN STATIONARY AND MARINE Steam Bollers or GenerATODS
"
PROVISIONAL SPECIFICATION left by the said James Stead Crosland
at the Office of the Commissioners of Patents, with his Petition,
on the 8th November 1872.
I, JAMES STEAD CROSLAND, of the City of Manchester, in the County
of Lancaster, Engineer, do hereby declare the nature of the said In-
vention for "IMPROVEMENTS IN STATIONARY AND MARINE STEAM BOILERS OR
GENERATORS," to be as follows:-
My Invention relates to such a construction and arrangement of boiler
and its furnace and flues as will generate high-pressure steam safely,
rapidly, and economically; the boiler being arranged so that the heat
from the furnace while at its greatest temperature will come directly in
contact with the cylinders and tubes forming the boiler, which cylinders
form a fire-box or enclosure to the furnace, and the heated gases first
passing therefrom.
The said improved construction and arrangement of boiler and its
furnace and flues consists as follows:-Four cylinders are used, and two of

page_text: them are arranged over the other two, with spaces between them. Each
upper cylinder is connected by tubes with the cylinder below it, and the
lower cylinder on one side is connected with the upper cylinder on the
other side by diagonal tubes; the tubes from one side cross those from
the other side alternately. The tubes are connected to the cylinders by
exterior flanges, and do not pass in a line drawn between the axes of the
cylinders but on one side of such line, so that each tube can be separately
removed and replaced. The unfill'd spaces between the upper and
lower cylinders are closed by brickwork or fire-resisting material, and
flues are formed by brickwork at the exterior of the four cylinders on
each side.
The furnace is placed under the lower cylinders, or within or between
the four cylinders, at one end, and the gases first pass through the box
or space enclosed between the four cylinders, then along the flue at one
side, and then across and along the flue at the other side (at the exterior
of the four cylinders) to the chimney. The upper surface and the space
between the two upper cylinders is closed by brickwork.
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 2nd May 1873.
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 Eighth day of November, in the year
of our Lord One thousand eight hundred and seventy-two, in the 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,

page_text: 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 STATIONARY AND MARINE 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 same
is to be performed, to be particularly described and ascertained in and
by the following statement and the accompanying Drawings (that is to
say):-
My Invention relates to such a construction and arrangement of boiler
and its furnace and flues as will generate high-pressure steam safely,
rapidly, and economically; the boiler being arranged so that the heat.
from the furnace while at its greatest temperature will come directly in
contact with the cylinders and tubes forming the boiler, which cylinders
form a fire-box or enclosure to the furnace and the heated gases first
passing therefrom.
The said improved construction and arrangement of boiler and its
furnace and flues consists as follows:-Four cylinders are used, and two.
of them are arranged over the other two, with spaces between them.
Each upper cylinder is connected by tubes with the cylinder below it,
and the lower cylinder on one side is connected with the upper cylinder
on the other side by diagonal tubes; the tubes from one side cross those
from the other side alternately. The tubes are connected to the
cylinders by exterior flanges, and do not pass in a line drawn between
the axes of the cylinders but on one side of such line so that each tube
can be separately removed and replaced. The unfilled spaces between
the upper and lower cylinders are closed by brickwork or fire-resisting
material; and flues are formed by brickwork at the exterior of the four
cylinders on each side.
The furnace is placed under the lower cylinders or within or between
the four cylinders at one end, and the gases first pass through the box or
space enclosed between the four cylinders, then along the flue at one

page_text: side, and then across and along the flue at the other side at the exterior
of the four cylinders to the chimney. The upper surface and the space
between the two upper cylinders is closed by brickwork.
The boiler is adapted for marine purposes by omitting the exterior
flues.
Fig. 1 is a longitudinal section; Fig. 2 is a cross section through the
furnace; and Fig. 3 is a plan section of a boiler and its flues according
to my Invention. a, the two lower cylinders; b, the two upper
cylinders; c, tubes which connect those cylinders that are placed one
over the other; d, diagonal tubes; d₁, horizontal tubes connecting the
two lower cylinders; e, steam chest connected with the two upper
cylinders (a): the furnace fin this illustration is placed below the two
lower cylinders (b), and the spaces 9 and h between the cylinders are
closed by brickwork, so that the gases from the furnace will pass along
the flue formed by the space enclosed by the four cylinders, then along a
side flue i and across the end, and then along the other side flue to the
chimney, being the damper; j are descending mud collectors, which
are connected by a pipe having a blow-off cock actuated by a shaft k
passing to the front of the fire-place.
Fig. 4 is a cross section of the boiler shown by Figs. 1, 2, and 3, but
showing that the furnace may be arranged so as to be fired from the
side of the cylinders (throughout their length), instead of the end.
I have now particularly described the nature of my Invention, and the
mode of carrying it into effect, and claim as my Invention the con-
struction, combination, and arrangement of cylinders connecting tubes,
furnace, and flues, as herein-before described and illustrated by the
accompanying Drawings.
In witness whereof, I, the said James Stead Crosland, have
hereunto set my hand and seal, this Twenty-ninth day of April,
in the year of our Lord One thousand eight hundred and seventy- a
three
J. S. CROSLAND. (L.S.)