Improvements in Water Tube Steam Boilers.
Year: 1897

page_text: Date of Application, 13th Apr., 1897-Accepted, 29th May, 1897
COMPLETE SPECIFICATION.
Improvements in Water Tube Steam Boilers.
I, EUSTACE ERNEST WIGZELL, of Billiter House, Billiter Street, London, E.C.,
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
:1
The object of my improvement is to obviate the difficulties hitherto existing in
boilers of this class of drawing the tubes when these are fitted at an angle with the
vertical, and I claim that my improved boiler possesses the following advantages.
The tubes can be withdrawn, plugged, or renewed, with the greatest ease; it is most
simple in construction; it possesses a very free circulation and great heating surface,
and in case of accident to or the bursting of any tube, the water would only run out
of the section affected the other sections remaining in working order, so that the
damaged section or sections can be renewed or the tubes plugged or drawn with great
rapidity.
In order that my invention may be the better understood, I hereunder proceed
to describe same in connection with the drawings annexed hereto.
In these drawings I show in Fig. 1. an end view, and in Fig. 2 a plan of one of
my improved boilers with straight vertical angle tubes, and in Fig. 3. a side view and
in Fig. 4. a plan of one of my improved boilers with curved tubes.
On each side of the furnace A. Fig. 1. I have corrugated square tubes E. E. these
square tubes having their corrugations on two of their sides. The corrugated square
tubes strike out from each side of the fire, sloping upwards, their corrugations fitting
into each other as shown in Fig. 2 at B₁ B'. In these corrugated square tubes E. E.
I expand tubes, these latter tubes running upwards at an angle with the vertical
and coming together over the centre of the fire. These vertical angle tubes may be
curved as shown C. in Fig. 3. or straight as shown C. in Fig. 1. At the top of these
tubes I have other corrugated square tubes B. B. also corrugated on two sides, and
corresponding with the bottom corrugated square tubes E. E. and having the
tubes C. C. expanded in them, the top corrugated square tubes having tubes at their
ends, as shown F. F. running direct into the steam or water chest G. G and on the
upper side of the top corrugated square tubes B. B. I have hand holes D. opposite
each tube with corresponding hand holes D. on the underside of the bottom corrugated
square tubes E. E., the fire passing right and left in amongst the tubes C. C. and in
between and round the connecting tubes F. F. which lead from the corrugated square
tubes B. B. into the steam or water chest.
On each of the bottom corrugated square tubes E. E. there are pipes H. H. Fig. 1
and H. Fig. 3. connected to their lower ends, and on each of these pipes there are
cocks I. Figs. 1 and 3, coupled to a horizontal tube J. so that should one of the tubes
burst in a section, by closing all the cocks on each side of the furnace, the water
would only run out of the section affected. For insuring that all the cocks I. are
open when the boiler is working I have a bar K. Fig. 3. passing through the plugs
with a padlock.
I can if necessary put a circulating pipe from the bottom pipe J. to the bottom of
the steam or water chest G. as shown at L. in Fig. 3.
In Fig. 3. I show a side view of the boiler with an end view B. of the square tubes,
these square tubes have two sides facing downwards and two sides facing upwards,
the curved tubes which run into these square tubes being shown C., the curved
tubes C. being expanded into the top square tubes B. and also into square tubes E. at

page_text: their bottom ends, these bottom square tubes being also arranged with two sides facing
downwards and two sides facing upwards, and being arranged to correspond with the
top square tubes B., the two top sides of the top square tubes, and the two bottom
sides of the bottom square tubes having hand holes D. with covers, placed so that the
curved tubes C. can be drawn out from the square tubes B.
Fig. 4. is a plan looking down on the top of the top square tubes B. showing the
manner in which they are arranged with their corners coming together, and also
showing the connecting tubes F. which join the square tubes at their ends direct to
the steam or water chest G. the heat from the furnace passing in amongst these
connecting tubes.
If making a continuous boiler I can place my corrugated square tubes B. B. with
their connecting tubes C. C. and corrugated square tubes E. E. Fig. 1. these being
made in separate sections, on each side of the steam chest G. connecting the top
corrugated square tubes B. B. at their highest ends by the tubes F. F. direct to the
steam or water chest G, on each side, fire or heat passing in amongst them.
A similar arrangement could also be made with the curved tubes as illustrated in
Figs. 3. and 4.
My boiler can also be made double ended by either placing two sets back to back,
or by having a fire brick partition put in the centre so that fire doors could be fitted
to each end.
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. A water tube steam boiler having straight tubes at an angle with the vertical
expanded at the top and at the bottom into square tubes corrugated on two of
their sides, the top corrugated square tubes striking out on either one or both
sides from the steam or water chest at an angle with the horizontal and at right
angles to the steam or water chest, and the bottom corrugated square tubes striking
out right and left from the furnace at an angle corresponding with the top
corrugated square tubes the top of the top and the bottom of the bottom
corrugated square tubes being furnished with hand holes, and the top corrugated
square tubes having tubes from their ends leading direct into the steam or water
chest, the heat from the furnace passing in amongst the vertical angle tubes and
in between and round the connecting tubes which run from the ends of the top
corrugated square tubes into the steam or water chest.
2. In a water tube steam boiler the method of having curved tubes placed at
an angle with the vertical expanded at their top ends into the two underneath
sides of square tubes, and at their bottom ends into the two upper sides of square
tubes, the two upper sides of the top square tubes and the two under sides of
the bottom square tubes having hand holes corresponding with the curved tubes,
the corners of the square tubes meeting together, the square tubes being placed
side by side, and with their connecting curved tubes forming groups, the top
square tubes having connecting tubes leading from their ends direct into the steam
chest, the heat from the furnace passing in amongst them.
3. In a water tube steam boiler the method of stopping each section at the
bottom by means of a cock or valve connected to a pipe.
4. In a water tube steam boiler the method of insuring each cock being open by
means of a padlocked rod.
11
10