Improvements in Water Tube Steam Boilers.
Year: 1898

page_text: We, JOHN SAMUEL WHITE and JOHN LEE WHITE both of East Cowes, Isle of
Wight, Shipbuilders and Engineers, and ANDREW FORSTER, of the same place,
Draughtsman, do hereby declare the nature of this invention to be as follows:-
This invention relates to water tube steam boilers of the construction for which
Letters Patent No. 22222 of 1897 were granted to the present applicants and to
other water tube steam boilers in which water chambers at the lower part are
connected to a steam chamber at the upper part by means of rows or walls of tubes
between which tubes the gases from the furnace pass on their way to the casings
smokeboxes or uptakes and the object of the said invention is to cause or promote
equal or approximately equal distribution of the said gases among the tubes at
the several parts of the said rows or walls.
According to the said invention each casing smokebox or uptake is divided by
means of longitudinal transverse or both longitudinal and transverse partitions
or diaphragms into a number of flues through which the gases travel on their way
from between the water tubes to the exit from the boiler. The said partitions or
diaphragms are set respectively at such points in the casings, smokeboxes or
uptakes that the relation which the areas of the several flues bear to each other
and to the heating surface and to the area of the funnel or exit of the gases ensures
the required distribution of the said gases among the water tubes.
Dated this Ninth day of December 1898.
W. T. WHITEMAN,
Agent for the Applicants.
Improvements in Water Tube Steam Boilers.
We, JOHN SAMUEL WHITE and JOHN LEE WHITE, both of East Cowes, Isle of
Wight, Shipbuilders and Engineers, and ANDREW FORSTER, of the same place,
Draughtsman, do hereby declare the nature of this invention and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement:-
This invention relates to water tube steam boilers of the construction for which
Letters Patent No. 22222, of 1897 were granted to the present applicants and to
other water tube steam boilers in which water chambers at the lower part are
connected to a steam chamber at the upper part by means of rows or walls of tubes
between which tubes the gases from the furnace pass on their way to the casings
smoke boxes or uptakes and the object of the said invention is to cause or promote
equal or approximately equal distribution of the said gases among the tubes at
the several parts of the said rows or walls.

page_text: According to the said invention each casing smoke box or uptake is divided by
means of longitudinal or transverse or both longitudinal and transverse partitions
or diaphragnis into a number of flues through which the gases travel on their
way from between the water tubes to the funnel. The said partitions or
diaphragms are set respectively. at such points in the casings smoke boxes or
uptakes that the relation which the areas of the several flues bear to each other
and to the heating surface and to the area of the funnel or exit of the gases
ensures the required distribution of the said gases among the water tubes.
A water tube boiler having longitudinal and transverse partitions or diaphragms
arranged according to this invention in each of the side casings and in the uptake
by which partitions the said casings are each divided into eight flues through
which the gases from the furnace pass to the funnel after traversing the walls of
water tubes is illustrated in Figures 1, 2 and 3 of the accompanying drawings
Figure 1 being a side elevation Figure 2 a transverse section taken on the line A
Figure 1 and Figure 3 a plan with the funnel and uptake removed. Figure 4 is
a transverse section of a portion of a water tube boiler showing one of the side
casings or smoke boxes divided transversely as in the arrangement Figures 1, 2
and 3 and also divided longitudinally by two partitions or diaphragms arranged
in the said casing or smoke box and in the uptake. Figure 5 is a similar section
showing the smoke box divided by two longitudinal diaphragms only no transverse
diaphragms being provided.
In all the arrangements illustrated the furnaces are marked a the water cham-
bers the steam chamber c the water tubes & the side casings or smoke boxes e the
uptakes the funnel the longitudinal diaphragms h and the transverse
diaphragms i.
In the arrangement illustrated in Figures 1, 2 and 3 and in that illustrated in
Figure 4 the lower edges of the longitudinal diaphragms bear against or are
secured to the water tubes and their upper edges are secured by angle irons or
brackets jj to plates & forming the tops of the smoke boxes e e through holes ll
in which plates the gases pass into the uptake.
In Figure 5 no support for the upper edges of the longitudinal diaphragms is
illustrated but where necessary to prevent buckling the said diaphragms may be
supported by distance pieces.
Where the smoke boxes are to be divided only by transverse partitions or
diaphragms they are or may be arranged in the positions illustrated in Figures 1
and 3.
Although in the accompanying drawings the said invention is illustrated only
as applied to water tube boilers of the bifurcated type we wish it to be under-
stood that the said invention is applicable to boilers having three or more rows
or walls of water tubes.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is :-
The division of the casings or smoke boxes or uptakes of water tube steam
boilers by means of longitudinal or transverse or both longitudinal and transverse
partitions or diaphragms into a number of flues through which the gases travel on
their way from between the water tubes to the funnel and by which distribution
of the said gases among the water tubes as required is ensured substantially as
hereinbefore described.
Dalt dar of Santamber 1899
W. T. WHITEMAN,
Agent for the Applicants.