Improvements in Water-tube Steam Generators.
Year: 1899

page_text: Date of Application, 20th Feb., 1999
Complete Specification Left. 20th Nov.. 1899-Accepted. 17th Feb., 1900
Complete Specification Left. 20th Nov.. 1899-Accepted. 17th Feb., 1900
PROVISIONAL SPECIFICATION.
Improvements in Water-tube Steam Generators.
I, PERCY RICHARD JULIUS WILLIS, of Fairfield, Kingston-on-Thames, in the
County of Surrey, Consulting Engineer, do hereby declare the nature of this
invention (a communication to me from abroad, by Joseph Provuncher, of East
Providence, Rhode Island, U.S.A., Inventor) to be as follows:-
-
This invention relates to that class of steam generator consisting, for the most
part, of a series of tubes in which the steam is generated; and the object of the
invention is to provide more efficient means for clearing the tubes of foreign
matter commonly referred to, in connection with steam generators, as mud."
By this invention a series of pipes extend around the four sides of the fire-
box. Corner stand-pipes extend upwardly from the aforesaid pipes and are
connected with a drum mounted above the steam or water-tubes. The stand
pipes are connected horizontally, at their upper ends, and also between their
ends by similar pipes. The series of pipes, first mentioned, have vertical pipes
projecting upwardly therefrom on all the vertical sides of the fire-box, and
are connected by cross-pipes at their upper ends.
T
201
1
1000
P. R. J. WILLIS,
Applicant.
Improvements in Water-tube Steam Generators.
I, PERCY RICHARD JULIUS WILLIS, of Fairfield, Kingston-on-Thames, in the
County of Surrey, Consulting Engineer, do hereby declare the nature of this
invention, (a communication to me from abroad by Joseph Provuncher, of East
Providence, Rhode Island, U.S.A., Inventor), 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 in which the water legs are
arranged around the four sides of the fire-box and open into and extend vertically
from the mud-drum of the boiler to provide an increased heating-surface; and
it consists of the combination of the parts, as hereinafter described and claimed.
Figure 1 represents a front elevation of the boiler as provided with my improve-
ment. Fig. 2 is a side elevation of the same. Fig. 3 is a rear elevation of the
boiler. Fig. 4 is a top plan section of my improvement as seen on line ar of
Fig. 1, and shews the manner of locating the water-legs on the mud-drum
tuhino

page_text: Referring to Figure 1, A designates the mud-drum tubing, which extends around
the four sides of the fire-box. being provided with the usual elbows B at each
corner thereof. From each of the four elbows B extend the vertical pipes C,
each of which connects with a T-fitting 1), located near the top portion of the
boiler-tubing. A pipe or tube C¹ extends from the upper end of the said fitting
for a short distance, and connects with the elbows E at the top of the boiler
tubing Extending lengthwise from the elbows E, respectively, are short branch
pipes F, having each end connecting with the T-fitting G, which is located
centrally with the boiler. The pipes C, C¹ thus form continuous tubes from the
mud-drum to the elbows E and pipes F. Pipes or tubes H connect with the
T-fittings D on each side, and all of the aforesaid piping is constructed alike,
both on the front and rear elevation respectively, of the boiler.
Water legs C, provided with nipples J, enter into the mud-drum tubing A
and extend vertically therefrom around the sides and back of the fire-box, said
water legs being equally divided from centre to centre, as will be seen in top plan
section Fig. 4.
On the front elevation of the boiler there are only four water-legs, two located
at the central portion, and one at each end of the mud-drum, respectively, and
which allows of a space for the door openings of the fire-box. The said four
water legs are connected with T-fittings K, which have the short tubes L
extending lengthwise between them. Small pipes m lead up vertically from
the top of the fittings K and tubes L, respectively, and connect with the
elbows from whence the said pipes continue lengthwise back and forth and
around the turns p to the elbows 7, (Fig. 3,) where they connect with the
vertical branch pipes s, leading to the tube or pipe F.
At the rear of the boiler the pipes m, corresponding to the pipes m in the
front, extend directly upward from the water legs C to the elbows from
whence the pipes continue lengthwise intermediate the pipes m, and, in the
same manner, extend back and forth around turns to the elbows (Fig. 1)
which are connected by pipes, corresponding to the pipes s, with the pipes F.
In referring to Fig. 2, which represents a side view of the boiler, small
pipes m lead vertically from the top of each of the water legs C"; there
being two sets of pipes m³, that is to say, one set which extends upwardly from
the water legs C on the left hand side of the boiler (see Figs. 2 and 4) and
those which extend upwardly from the water legs C on the right hand side
of the boiler. Those pipes m¹ on the left hand side connect with the elbows n¹
from which they extend to and fro around the turns across the boiler, and
finally terminate in elbows and pipes which are situated on the right hand side
of the boiler and respectively correspond with, but are intermediate those elbows
marked and pipes marked s¹ connected to the pipe H on the left hand side shewn
in Fig. 2. Similarly the pipes m¹ which extend upwardly from the water
legs C on the right hand side of the boiler are connected to elbows corres-
ponding to elbows marked on the left hand side of the boiler (Fig. 2)-and
then extend to and fro around turns (intermediate the turns and those
pipes which start from the left hand side as aforedescribed) and finally
terminate in elbows and pipes s¹ connected to the pipe H on the left hand
side of the boiler. It will therefore he understood that a double series of
pipes m extend to and fro across the boiler beneath and at right angles to
the double series of similar pipes extending from the front and rear of the boiler.
M. Mare pipes leading from the T-fittings G of the tube F to the steam cylinder S
(see Fig. 2).
The water inlet of the boiler is the pipe . which connects with the
mud-drum, (see Fig. 1) and the steam outlets are the pipes oo, which open
from the cylinder S.
After the several pipes and tubes are constructed, and arranged to form a
boiler, as herein shewn and described. it is mounted on a grate of the required
area, The mud-drum surrounds the fire-box on the four sides thereof, and the

page_text: whole boiler is enclosed by a suitable wall or casing in the usual manner. By
this arrangement the water legs C vertically connect with the mud-drum A,
which surrounds the fire-box, and so a greater area of heating surface is exposed
to the flame, and thereby the water contained within the water-legs is able to
circulate more quickly and in an effective manner throughout the groups of
tubes, and thus generate steam very rapidly.
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:
In a water tube steam generator, the combination of the mud-drum, pipes A
continuous of each other and extending around the four sides of the fire-box,
the corner stand-pipes C connected with the mud-drum and leading vertically
to the manifolds and H, respectively, with the water-legs C connected with
and communicating with the mud-drum pipes and arranged to extend vertically
from said mud-drum pipes upon all the vertical sides of the fire-box, substantially
as described.