Improvements in Steam Generators.
Year: 1895

page_text: Date of Application, 23rd Apr.; 1895
Complete Specification Left, 23rd Jan., 1896-Accepted, 29th Feb., 1896
Improvements in Steam Generators.
I, ARTHUR GEORGE MUMFORD, of Culver Street Iron Works, Colchester,
Engineer, do hereby declare the nature of this invention to be as follows:
My invention relates to an improved construction of water tube boiler, especially
adapted for use in torpedo boats where the head room is limited which necessitates
the height of the boiler being reduced to a minimum.
My improved boiler is of the well-known type, consisting essentially of a steam
collector, two water chambers, a series of tubes connecting the water tubes with
the steam collector, and of one or more return tubes connecting the steam collector
with the water chambers. In my prior Patent No. 8729 of 1893 I described a
specific construction of this type of boiler in which the water tubes were arranged
in groups forming detachable elements which provided for the ready removal of
any of the said elements or groups of tubes or for the ready replacement of any
single tube in any element or group.
In other water tube boilers of this construction the water tubes have been fixed
direct to the steam collector rendering the removal and replacement of damaged
tubes a difficult and troublesome task.
According to my present invention I use the ordinary circular steam collector,
and along each side of it I form secondary steam collectors preferably of a half
round shape in cross section and closed by a flat plate, the said secondary steam
collectors being in communication with the main collector by one or more pipes or
tubes. The water chambers are also preferably made of a half round shape in
cross section with flat closing plates, the said water chambers being so. arranged
with respect to the secondary steam chambers that the water tubes-which are
preferably curved-can be withdrawn through the secondary steam chamber by
the removal of the covering plate, and the new tubes be caulked at their junction
with the water chamber by removing the cover thereof. The water tubes are
preferably heut to such a shape as will give the greatest possible amount of heating
surface.
The uptake may be arranged either at the rear end of the beiler, or at the front.
end thereof in which case a longitudinal diaphragm is placed through the water
tubes on each side of the fire box, so that one half of each group of water tubes is
in the fire box and the other half in the return flue.
The return tubes connecting the steam collector with the water chambers. may.
be arranged either at the back or front of the boiler as found most convenient.
Dated thi nord dar of An 1905
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.

page_text: I, ARTHUR GEORGE MUMFORD, of Culver Street Iron Works, Colchester,
Engineer, 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 an improved construction of water tube boiler, especially
adapted for use in torpedo boats where the head room is limited which necessitates
the height of the boiler being reduced to a minimum.
The improved boiler is of the well-known type, consisting essentially of a steam
collector, two water chambers, a series of tubes connecting the water tubes with
the steam collector, and of one or more retura tubes connecting the steam collector
with the water chambers. In my prior Patent No. 8729 of 1893 I described a
specific construction of this type of boiler in which the water tubes were arranged
in groups forming detachable elements which provided for the ready removal of
any of the said elements or groups of tubes or for the ready attachment of any
single tube in any element or group. In other water tube boilers of this construc-
tion the water tubes have been fixed direct to the steam collector rendering the
removal and replacement of damaged tubes a difficult and troublesome task.
In the accompanying drawing which illustrates this invention:
Figure 1 Sheet No. 1 is a view in half sectional front elevation, and
Figure 2 Sheet No. 2 is a view in longitudinal section on line x Figure 1.
Throughout the views similar parts are marked with like letters of reference.
On each side of the steam collector A which is of the usual type is a secondary
steam collector A¹. These secondary collectors are preferably of a half round
shape in cross section and their open sides are closed by flat plates a'. The
secondary collectors A', A' are each in communication with the main collector A
by one or more pipes or tubes a. The water chambers B, B which are also
preferably made of a half round shape in cross section with flat closing plates bare
connected with the secondary steam chambers A', A' by a series of water
tubes X, X etc., so arranged that they can be withdrawn through the secondary
steam chambers A', A' after the removal of the covering plates a, a', and new
tubes can be caulked at their junction with the water chambers B, B by removing
the covers b, 6 thereof. The water tubes are preferably bent to such a shape as
will give the greatest possible amount of heating surface.
The return tubes C, C connecting the steam collector A with the water
chambers B, B may be arranged either at the back or front of the boiler as found
most convenient.
The uptake or uptakes D may be arranged either at the rear end of the boiler
as shown by the drawings or at the front end thereof, in which case a longitudinal
diaphragm is placed through the water tubes on each side of the fire box, so that
one half of each group of water tubes is in the fire box and the other half in the
return flue,
The other parts of the boiler to which no specific reference has been made,
present no novel features and may be of the usual construction.
Having now particularly described and ascertained the nature of my said-inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
(1.) The improvements in water tube boilers, as hereinbefore specified.
(2.) In a water tube boiler, the combination with the steam collector, the water
chomhere the waton when

page_text: as A¹ connected to the main steam collector by tubes or their equivalents as and.
for the purpose set forth.
(3.) A water tube boiler consisting essentially of a main steam collector such
as A, of two secondary steam collectors such as A¹ each preferably made of a half
round shape in cross section with flat closing plates such as a¹ and each connected
to the main collector by one or more tubes such as a, of two water chambers such
as B each preferably of a half round shape in cross section with flat closing plates
such as 6, of two groups of water tubes such as X connecting the secondary steam
collectors A with the water chambers B, and of two return tubes such as C
connecting the main steam collector A with the water chambers B, as and for the
purpose set forth.
Dated this 23rd day of January 1896.
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.