Improvements in Steam Generators.
Year: 1893

page_text: Date of Application, 13th May, 1893
Complete Specification Left, 13th Feb., 1894-Accepted, 12th May, 1894
PROVISIONAL SPECIFICATION.
Improvements in Steam Generators.
I, REECE HURFF ALEXANDER, of Fort Wayne, Indiana, U.S.A., Inventor,
do hereby declare the nature of this invention to be as follows:-
This my invention has reference to steam generators; the object of the invention
being to provide greater heating surface than heretofore.
By this invention the boiler tubes enter the rear wall of the furnace where they
are fitted with return bends. The tubes nearest the inner surface of the boiler are
extended along the sides of the furnace and are fitted with return bends in such
manner that water circulates through them and heat passes around and between
them. The tubes have open connection with the water space of the generator.
Dated this 13th day of May 1893.
W. H. MUNNS.
Applicant's Agent.
Improvements in Steam Generators.
I, REECE HURFF ALEXANDER of Fort Wayne, Indiana, U.S.A. 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:-
My invention consists in a boiler having novel auxiliary water heating and
steam generating tubes in communication with its water and steam space and
arranged within the fire box on planes higher than the grate and contiguous to the
boiler said boiler being provided with check valves, blow off cocks and sediment
or mud discharging means, as will be hereinafter described and claimed. By my
invention a large amount of the heat is saved, a greater amount of steam generated
by the heat from a given sized boiler furnace or steam generating apparatus
produced, without adding very greatly to the cost of the same, or increasing the
labor of attending to it.
In the accompanying drawings
Fig. 1, is longitudinal section through the wall and grate of a boiler furnace,
showing the boiler and my novel auxiliary water heating and steam generating
appliances in side elevation.
Fig. 2, is a cross section of the wall and grate of a boiler furnace showing the
boiler and auxiliary water heating and steam generating appliances in elevation.
Fig. 3, is a vertical longitudinal section of the furnace and boiler, portions of the
sediment removing tube being broken out, and the auxiliary water heating and
steam generating appliances being shown in elevation.
Fig. 4, is a horizontal section of the furnace with the boiler removed, and
showing the auxiliary appliances in plan view.
A, in the drawings represents the furnace wall; B, the grate and C the boiler;
D, D'auxiliary water heating and steam generating pipes arranged in nearly a
circle in a recess a, formed in the furnace wall above the grate B. A portion of
these pipes are carried from the bridge wall 6 to the smoke stack flue c of the
furnace and the remainder are on each side of the grate extended from the front
to the rear end of the boiler or fire chamber and flue. The respective pipes are

page_text: connected by hollow semi-circular couplings dd, the couplings being applied so
as to secure a serpentine or zig-zag passage throughout the pipes. It will be
observed. hy examining Fig. 4 of the drawings that the central pipe D' extends into
a coupling f, having three inlets g, gl, g', and that it enters the coupling by means
of the intermediate inlet g' while a pipe of each of the two series of pipes D D' is
entered into the inlets g g³.
With the pipe D³, a pipe D leading from the water space of the boiler connects,
and by this means the two series of pipes are supplied with water on each side of
the central pipe D².
The series of pipes D D is arranged so that the heat from the grate shall in
rising pass between the pipes and also against their outer surfaces, the recess a
formed in the furnace wall permitting this. It is very beneficial to have the water
and generated steam to pass through the pipes in opposite directions, as by this
means an equable distribution is secured, and all the pipes will be rapidly filled and
the water subjected more perfectly to the action of the diffused heat in the fire or
combustion chamber and flue under the boiler, and facilities for blowing out each
series of the pipes independently are afforded.
The two series of pipes D D', are connected respectively to a cross pipe G at
the rear of the boiler by means of two vertical pipes G' G2, and to another cross
pipe H by two inclined pipes H', and to the steam space of the boiler by a vertical
pipe H as represented.
The pipe G is provided with two check valves I l' and two blow off cocks J J¹;
and this pipe is connected by a vertical pipe k with a main blow off pipe K which
is provided with a blow off cock K'.
To this main blow off pipe a sediment or mud discharging pipe K is connected,
the latter pipe being arranged about one inch above and nearly along the entire
length of the boiler and having perforations A2 in it as well as being open at its
end in order to insure the rapid passage of the mud into it and out into the main
blow off pipe K when the cock K' is opened. By means of the blow off
cocks J J any sediment that may collect in the tubes D D' can be blown off, and
by means of the cock K' the mud at the bottom of the boiler can be blown off, it
being forced through the ends and perforations of the pipe k³.
It is an advantage to have two blow off cocks J J¹ and two check valves I I' in
the pipe G; as by that construction each section of the tubes D D' can be blown
out on opposite sides of the center of the fire chamber independently, and thus
more force is secured for blowing out and clearing the tubes D and D' of sediment.
It will be seen that the three central pipes of the series of water heating and
steam generating pipes are shortened at the point where the bend in the perforated
mud blow off pipe K is applied, but that all the other pipes are of the same length
in either side of those pipes which begin at the bridge wall & extend to the end of
the boiler.
The boiler is preferably tapered at its front end near its bottom, and the water is
taken from it by means of the horizontal pipe D', and conducted into the series
of pipes D D¹ by means of a vertical pipe D' and a horizontal pipe D. The
course of the water is in the direction of the arrows 1, 2, and 3. The steam
generated in the tubes D, D' passes through the pipes G, G' into the pipe G,
through the check-valves I, I''into the pipe H', and enters the interior of the
boiler.
The "blow-off," is through either one or both of the cocks J, J', (the cocks I, I¹,
being closed,) pipes H', H, k, into the pipe K. The mud in the bottom of the
boiler is blown off through pipe K' and cock K', into the pipe K.
It will be understood that those water heating and steam generating tubes that
lie directly above the bridge wall do not extend over the grate, and therefore the
quick circulation of the heat and flame in the fire chamber proper and between the
boiler and the tubes, and its direct contact with the forward part of the boiler is
not interfered with. This is important in order to insure perfect combustion and
heating of the water at the front of the boiler.

page_text: 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. The combination with a boiler, furnace walls and grate of the two series of
pipes D D' connected in zig-zag manner the pipe D' coupling ƒ and suitable
connections between said pipes D, D' and a boiler substantially as and' for the
purpose described.
2. The combination with a boiler, furnace walls and grate, of the two series of
pipes D D arranged between the boiler and the grate and in relief from the
furnace walls and connected in a zig-zag manner so that water circulates through
them and heat passes around and between them, the pipes of the respective series
of pipes having communication with each other and with the water space of a
boiler by means of a pipe D², a coupling f, pipes D*, D and D and with the steam
space of a boiler by pipes G G¹ and G³, the pipe G baving check valves and blow
off cocks and connected with a main blow off pipe substantially as described.
3. The combination with the boiler, furnace walls, grate, pipes D D', suitable
connections between the pipes D, D' and the boiler and the blow off pipe, of the
perforated mud discharging pipe and its blow off cock, substantially as described.
4. The combination of the boiler, walls of the furnace and the grate, of the two
series of pipes D D¹ suitable connections between the boiler and the pipes D, D¹,
a portion of the pipes of each series being extended from the rear of the boiler and
terminated at the bridge wall, while the remaining portions of the two series of
pipes D D¹ are extended substantially from end to end of the boiler substantially
as described.