Improvements in the Construction of Water Tube Boilers.
Year: 1896

page_text: Date of Application, 3rd Dec., 1896
We, EDWARD AUGUSTUS SANDFORD and HORATIO SANDFORD, trading as E. A. &
H. Sandford of Thames Iron Works Gravesend Kent England Engineers do hereby
declare the nature of this invention to be as follows:-
This invention relates to an improved construction of Steam Boilers. It con-
sists of a casing forming combustion chamber, the lower or front part of which
forms the Fire Box or Furnace sides with two removable exterior lateral water
pockets or in large boilers any convenient number of such pockets connected by
water tubes traversing the combustion chamber from Side to Side, being inclined
and fastened in tube plates, closing the pockets on the inside so that on removing
the pockets or on removing the doors on the back thereof the tubes are readily
accessiile for cleaning, removal or replacement.
The steam dome may enclose or partially enclose the upper end or part of the
combustion chamber. and communicate with the pockets at or near their upper
ends.
Dated this 3rd day of December 1896.
HERBERT HADDAN & Co.
Agents to applicant. 18, Buckingham Street, Strand, London.
Improvements in the Construction of Water Tube Boilers.
We, EDWARD AUGUSTUS SANDFORD, and HORATIO SANDFORD, trading as E. A. &
H. Sandford, of Thames Iron Works, Gravesend, Kent, England, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement;-
This invention consists of a boiler in which a number of tubes traverse the
space from one side to the other, the ends of the tubes being fitted in two plates
outside which two pockets are bolted or rivetted, the said pockets when rivetted
being provided each with one or more doors in the wall facing the ends of the
tubes; these tubes and the pockets being intended to contain the water and the
space around the tubes forming the fire space with the fire-box below or at one
end. A vessel forming a steam dome is placed above the tubes and communicates
laterally with the two pockets. The tubes are sufficiently inclined to permit the
escape of steam therefrom into the pockets and thence in the steam dome.
In the annexed drawing Figs. 1 and 2 are elevations and Fig. 3 a vertical part

page_text: section of a vertical type of boiler. Figs. 4 and 5 are elevations of a horizontal
type of boiler, and Fig. 6 is a section thereof...
A, A, are the tubes, one end of each being fixed in the plate 1, the other end in.
plate C. Plates B and 13 are rivetted together to form a pocket, plates C and C
are similarly connected to form the other pocket. D, D are doors bolted over
holes in plates B, C, E, E, represent stays. F is the steam dome reaching
from one pocket to the other and covering in the most part of the space G about
the tubes A. H is the hole by which steam passes from the pockets into the
steam-dome. The space G Figs 1 to 3 is closed in by the cast-iron front L, back K
and sides J. In the front is the door or doors M. The lowermost part within the
casing forms the ash-pit N above which are the fire-grate-bars O. P is the smoke
stack.
Figs 4 and 5 show a horizontal form in which the fire gases pass under the
fire tile division Q and back over the same and under the division Q¹ to the smoke-
stack. The space G is here enclosed with iron plates lined with fire brick.
By unbolting the doors D, or D', the tubes may be cleaned,, and by removing
one side or pocket after loosening the tubes from the same or from the other
pocket, the pocket may be removed leaving the tubes or together with the tubes
as the case may be.
Instead of providing removable doors to the pockets, the outer plates of the
latter may be secured to the inner plates by bolts so as to be removable.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, we' declare that what wo
claim is;-
A boiler having a number of water-tubes A extending from one side pocket to
the other side pocket, these pockets being made with doors in the outside plates
or with said outside plates themselves removable, and having a steam-dome
communicating with said two pockets; the space about the tubes A between the
pockets being inclosed by plates to form a fire chamber with a grate under or at
one end thereof and a smoke stack, said space being divided or not by fire brick
divisions and having the ash-pit in the base thereof.
Dated this 3rd day of September 1897.
HERBERT HADDAN & Co.,
Agents to the Applicants, 18, Buckingham Street, Strand, London, W.C.