Year: 1898

page_text: Date of Application, 24th Dec., 1898-Accepted, 28th Jan., 1899
JOHN CHARLES RAYMOND OKES, The Limes, Brondesbury Park, London, N.W.,
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:
The improvements which are herein described and illustrated have for their object
the increase of heating surface, durability of those parts exposed to the hot gases
and improved form of fire box together with better circulation of water. They
apply more particularly to water-tube boilers of the nature of those described in my
Specification No. 22,049 A.D. 1895.
It is usual in boilers having horizontally inclined generating tubes with closed
ende to support the lower ends of the tubes upon a perforated plate of iron or other
material. In place of this I propose using a water casing or hollow construction
containing water-thus adding to the heating surface of the boiler and the
durability of the support. The form of construction I prefer is that similar to
the flat sides of a locomotive fire box but stayed with short tubes which pass
through the water space and are expanded into the sides or otherwise rendered water
tight. These short tubes being larger in diameter than the generating tubes allow
them to enter and form a rest or support for same.
The fire box I propose using is similar in construction to that of a locomotive,
the back end (preferably) being connected by a pipe or pipes to the lower end of the
hollow tube support above described. The front end or sides of the fire box 18 or are
connected by a pipe or pipes to the lower end of the boiler header (or front of the
boiler). The water is thus enabled to circulate upwards from the generating tubes,
through the drum or by a pipe down the back casing into the sides of the fire box
and from there up to the front compartment of the boiler header
The flat water spaces of the fire box also act as mud-depositing chambers from
which the sediment can be blown out, and the surfaces exposed to the heat of the
fire are utilized in the formation of steam.
In order to enable my invention to be clearly understood I now proceed to
describe the same by aid of the accompanying sheet of drawings in which
Fig. I is a sectional elevation of the boiler.
Fig. II represents a section of the hollow back on tube support.
Fig. III Front elevation of boiler.

page_text: generating
B.
F Hollow back support for generating tubes D.
G Pipes connecting part C of header A, drum H and hollow-baok support F.
H Drum.
F Hollow back support for generating tubes D.
G Pipes connecting part C of header A, drum H and hollow-back support F.
H Drum.
ripes connecting notow-back support r and fre cox K.
K Fire box.
L Pipes connecting fire box K with front compartment B of header A.
A Short tubes in hollow-back support F.
N Blow-off cock on water cased file box K.
0 Alternative form of fire box Figs. VI and VII.
P Stop valves on pipes J.
The circulation of water is from the generating tubes D up section C of the
header A through the steam drum H and pipes G down the hollow-back support F
through the pipes J and hollow-sides and back of fire box K through pipes L into
section B of header A and through the circulating tubes E back to the generating
tubes D.
The blowing out of sediment is accomplished by closing stop valves P and
opening blow-off cock N thus reversing the above described circulation.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is :-
I. In water-tube boilers having vertical or inclined headers carrying generating
tubes with closed ends and fitted with internal circulating tubes, the water cased
back for supporting the tubes as shown and for the purpose described.
II In water-tube boilers having vertical or inclined headers carrying generating
tubes with closed ends and fitted with internal circulating tubes, a fine box formed of
plates stayed together as in a locomotive boiler.
III. In water-tube boilers the combination of headers, generating tubes with
closed ends and internal circulating tubes and water cased back support for tubes,
with the locomotive type of fire box.
IV. The mode or cycle of the circulation of water up through the fire box K
generating tubes D steam drum H or its equivalent down through the water cased
tube support F and its connections J with the fire box K.
V. The mode of blowing out or cleansing the boiler by reversing the circulation by
means of valves or cocks as illustrated and described.
Dated this 24th day of December 1898.