Improvements in and relating to Steam Boilers.
Year: 1894

page_text: Date of Application, 30th May, 1894-Accepted, 28th July, 1894
COMPLETE SPECIFICATION.
Improvements in and relating to Steam Boilers.
I, WILLIAM SAUR, a citizen of the United States of America, residing at
325 N Street South West, in the City of Washington, District of Columbia,
United States of America, Steam 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 :-
As is well known, the brick walls of the furnaces or fire boxes of steam boilers
require to be frequently rebuilt, owing to the intense heat to which they are
subjected burning them out. Aside from the expense attached to the rebuilding
of the walls the owners or users of the boilers are frequently caused great
inconvenience, and often serious loss by reason of the loss of the use of the boiler
while cooling off preparatory to rebuilding and during the time necessarily occupied
in rebuilding. Beside the objections just noted to the use of masonry for the
purpose named, a further objection exists in that the masonry absorbs a large
proportion of the heat generated in the furnace, which heat is wasted and serves
no useful purpose whatever, and is frequently the cause of injury to the boiler
shell when the boiler is blown off before the walls of the furnace and setting of the
boiler have cooled down sufficiently.
Now it is the object of my invention to provide a casing or setting for steam
boilers which is more durable than brick and not so liable to be injured by the
heat, and in which the heat now wasted on the masonry may be utilized to heat
large quantities of water for use in the boiler or for other purposes, as in laundries or
factories requiring heated water in large quantities, without the use of additional
fuel, the water so heated being at the some time greatly purified.
With these objects in view my invention consists in providing a hollow metal
casing adapted to cover and protect the boiler and to form the walls of the furnace
or fire box, the sides of said casing being connected by a hollow bridge, a hollow
dead plate, and a hollow return plate or diaphragm, whereby a free and uninterrupted
flow or circulation of water may be maintained throughout the casing at all times,
all of which will be more fully hereinafter described and claimed.
In the accompanying drawings forming a part of this Specification-
Figure 1 is a longitudinal vertical section through a boiler provided with my
improved casing; Figure 2 a perspective detail view showing the connection
between the return plate and casing; Figure 3 a front elevation of the boiler, and
Figure 4 a vertical cross section on the line x-x, Figure 1.
Similar letters refer to similar parts throughout the several views.
Referring to the drawings, A represents the boiler proper, which is provided
with the tubes B and steam dome C, as is usual. The fire box or furnace is
arranged as usual directly below the boiler and its grate bars rest at one end on
the bridge D and at the other end on the hollow dead plate E, and the products of
combustion pass first along the underside of the boiler to its end and are returned
forward through the tubes B to the front of the boiler and then over the top
thereof to the smoke stack F at the rear. The casing G within and on which the
boiler rests or is supported consists of metal plates cast in the desired form and
rigidly secured together to form a watertight reservoir independent of the boiler
and forming a jacket or setting therefor.
In the present instance I have shown the jacket or casing as extending the
entire length of and slightly beyond the rear end of the boiler at its sides, said
casing being connected at its rear end by a hollow diaphragm or return plate H

page_text: The
which is bent at right angles at its upper end and attached or rests against the rear
end of the boiler so as to direct the products of combustion into the tubes B.
diaphragm or return plate serves to brace and strengthen the sides of the casing
and does not extend quite to the bottom of the combustion chamber I, sufficient
space being left below it to provide for the cleaning of the combustion chamber
through a door or manhole a at the rear end of the casing.
The casing extends over and across the top of the boiler and back to the steam
dome, and is fitted or connected to an extension piece J, which extends back to the
smoke stack and forms a cover for the rear end of the top of the boiler. The
hollow bridge D is formed of metal and is curved on its upper surface to conform
to the shape of the boiler, and is, preferably, of greater area than the ordinary
bridge and extends back further into the combustion chamber and communicates
at each end with the hollow side walls of the casing. While the bridge may be
made so as to extend to the floor of the furnace, I prefer to make it of less depth
than this would require and support it on a brick wall K, as shown. At its front
the casing is hollow throughout that portion thereof which extends down on each
side of the doors of the furnace being connected by the transverse hollow dead
plate E, so that the boiler and fire box or furnace is completely surrounded by a
hollow covering or casing which takes the place of the ordinary brick setting therefor.
The boiler rests on the side walls of the casing at b, and the plates forming the walls of
the casing are held together and braced by means of bolts e which pass through tubes d
arranged between the plates and are headed over at the outside of the walls as
shown in Figure 4. The water is fed to the casing at the front end thereof at the
top, an automatic float or other valve e being employed to control the admission of
the water thereto. A suitable glass gauge is also mounted at the front end of the
easing so that the height of the water in the casing may be ascertained at a glance.
Near the bottom of the front end of the casing hand holes g are formed, and
suitable covers or doors provided therefor through which access may be had to the
bottom of the casing to clean out the same. I also provide suitable injectors or
pumps for the casing, whereby the water heated in said casing may be fed to the
boiler or conducted or drawn off to be used for other purposes, and a steam dome
may be formed at the top of the casing if desired.
From the above description it will be understood that the mud or other heavy
impurities contained in the water will settle at the front and along the bottom of
the casing at the sides and may be readily removed therefrom through the doors or
openings 9 at the front of the casing, thus enabling me to feed a comparatively
pure water to the boiler, thus lessening the liability of the boiler becoming
incrusted. Also as I provide a complete water covering for the boiler and furnace
it is evident that the heat playing on the walls of the cover or casing will have less
injurious effect thereon, as the water filling the casing will constantly change or
circulate therein so as to present at all times to the heated interior wall of the
casing a body of water of less temperature than the heated wall itself, thereby
utilizing the heat heretofore wasted and at the same time rendering the setting more
durable.
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 :-
1. A steam boiler and furnace setting or covering consisting of a hollow metal
casing independent of said boiler and fire box and not communicating therewith
adapted to surround the boiler and fire box and to be filled with water, substantially
as described.
2, A casing or setting for steam boilers and furnaces, consisting of hollow metal
covering or top and rear and front walls, all communicating and adapted to be filled
with water, substantially as described.
3. A casing or setting for steam boilers, consisting of a hollow metal casing

page_text: independent of and surrounding the boiler and fire,box, a hollow dead plate, a
hollow bridge, and a hollow return plate, all communicating with said casing,.
substantially as described.
Dated this 30th day of Me 1891
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents..