Improvements in Water Tube Boilers
Year: 1897

page_text: Date of Application, 21st Jan., 1897
Complete Specification Left, 21st Oct., 1897-Accepted, 1st Jan., 1898
PROVISIONAL SPECIFICATION.
"Improvements in Water Tube Boilers."
I, GEORGE FLETCHER, of Masson and Atlas Works, Litchurch, Derby, in the
county of Derby, Engineer, do hereby declare the nature of this invention to be as
follows:
-
This invention relates to improvements in water tube boilers and has for its
object to facilitate the generation of steam in such boilers, to simplify their con-
struction and to render them safe at high pressures and also to so construct such
boilers that they can be easily and efficiently cleaned.
;
In carrying out my invention I provide a number of sections or headers at the
front and rear ends of the boiler, the front set of headers being connected to the
rear set by straight water tubes. Each header both at the front and rear end, is
connected to an upper inclined steam and water receiver by means of a straight_
radially arranged connecting pipe.
By this construction of water tube boiler the radial connecting pipes at the front
end of the same can open into the upper steam and water receiver at a point above
the level of the water in the said receiver so that the circulation of the water,
through the receiver and water tube is greatly facilitated.
The headers are so supported that allowance is made for the necessary expansions;,
and contractions due to changes of temperature and the hand-hole covers to the
water legs are fitted internally so as to render them safe against internal pressure.
I also find it advantageous to so connect the tubes to the receiver that the plates of
the latter are not reduced in strength and I effect this by staggering the said tubes.
Dated this 21st day of January 1897.
Improvements in Water Tube Boilers.'
We WILLIAM PARRATT, of 38 Lyndhurst Road, Peckham, in the county of
London, Gentleman, RICHARD HOWARD HAYWOOD MARSH, of Alvaston near Derby
Engineer, and FLORENCE CLARA MARSIT (wife of the said Richard Howard Haywood
Marsh) the Executors of the late George Fletcher, of Masson and Atlas Works,
Litchurch, Derby, in the county of Derby, Engineer, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be par-
ticularly described and ascertained in and by the following statement: -
This invention relates to improvements in water tube boilers and has for its
object to facilitate the generation of steam in such boilers, to simplify their con-

page_text: .
struction and to render them safe at high pressures and also to so construct such
boilers that they can be easily and efficiently cleaned.
In carrying out my invention I provide a number of sections or headers at the
front and rear ends of the boiler, the front set of headers being connected to the
rear set by straight water tubes. Each header, both at the front and rear end, is
connected to an upper inclined steam and water receiver by means of a straight
connecting pipe.
By this construction of water tube boiler the connecting pipes at the front end
of the same can open into the upper steam and water receiver at a point above the
level of the water in the said receiver so that the circulation of the water through
the receiver and water tubes is greatly facilitated.
To enable my invention to be fully understood I will describe the same by refer-
ence to the accompanying drawings, in which :-
:-
Figure 1 is a longitudinal vertical section of a water tube boiler constructed
according to my invention:
Figure 2 is a vertical transverse section of the same:
Figure 3 is a view drawn to a larger scale illustrating the two ends of the steam
and water receiver, headers and connections:
Figure 4 is a sectional side elevation shewing a different method of connecting
the headers to the steam and water receiver:
Figure 5 is a sectional end elevation thereof.
a, a are the front set and b, b are the rear set of headers; c, c are the straight
water tubes connecting the two sets of headers. is the steam and water receiver,"
and e, e are the connecting pipes by means of which each header is put in com-
munication with the steam and water receiver d.
In the arrangement shewn n figures 1 to 3, the said connecting pipes e, e are
arranged radially to the steam receiver and they are expanded into the headers and
receiver.
In the arrangement shewn in figures 4 and 5, the connecting pipes e, e instead
of being arranged radially to the receiver d, are arranged in alignment with the
headers and in lieu of being expanded into the convex underside portion of the
steam and water receiver d, they are expanded into pockets f which may be
separated from and be riveted to the said receiver d as shewn in the said figures or
which may be formed by dishing the underside of the receiver.
With this construction of boiler, it will be obvious, as above described, that the
water can circulate with great facility through the receiver and water tubes by
reason of the construction whereby the connecting pipes e, e from the front
headers a, a open into the steam and water receiver above the water level as
clearly indicated in figure 1, whilst the bottom end of the said receiver contains
water.
The rear set of headers are supported by rods g, 9 suspended to brackets h, h on
the receiver d so that allowance is made for the necessary expansions and con-
tractions due to changes of temperature.
In practice the hand-hole covers to the water legs are fitted internally so as to
render them safe against internal pressure and I also find it advantageous to so
connect the tubes to the receiver that the plates of the later, are not reduced in
strength and I effect this by staggering the said tubes.
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. In a water tube boiler, the combination with an inclined steam receiver of
headers arranged at the front and rear ends of the boilers, the two sets of headers
being connected together and to the receiver, substantially as herein before
described.
2. In a water tube boiler, the combination with an inclined steam and water
receiver of front and rear sets of headers connected together by straight water

page_text: tubes and to the steam and water receiver by straight radially arranged connecting
pipes, substantially as described and illustrated in figures 1, 2, and 3 of the accom-
panying drawings.
3. In a water tube boiler, the combination with an inclined steam and water
receiver of front and rear sets of headers connected together by straight water
tubes and to pockets formed in the receiver by straight connecting pipes, substan-
tially as described and illustrated in figures 4 and 5 of the accompanying drawings.
4. In a water tube boiler of the kind described in claim 1, the arrangement
whereby the front set of headers is connected with the receiver above the water
level and the rear set below the water level, substantially as described.
5. In a water tube boiler of the kind described in the preceding claiming clauses,
supporting the headers by means of rods from brackets upon the steam and water
receiver, substantially as described and illustrated.
6. The combination and arrangement of parts forming the improved water tube
boiler, herein before described and illustrated in the accompanying drawings.
01
Otol 1007
G. F. REDFERN & Co.
4, South Street, Finsbury, London. Agents for the Applicant.