Year: 1888

page_text: We, WALTER MORTON BROWN and SAMUEL WARREN WHITMORE, Attorneys-at-Law,
both of No. 55 State Street, Albany, New York, United States of America, 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:-
Figure 1 is a side elevation of our steam-generator without the brick-work setting
commonly used therefor.
Figure 2 is a transverse section of the same at the line X X.
Figure 3 is an enlarged transverse section of one of the gas and air tubes, water-
tube, and a modified form of hood for the water-tubes; and
Figure 4 is an enlarged plan view of a portion of one of the gas and air tubes.
This invention relates to a steam-generator in which combustible gas either natural
or artificial, and either commingled or uncommingled with atmospheric air-is used
for fuel; and it consists of a water-tube boiler so constructed that each water-tube
will have a perforated gas and air tube beneath it, and ranged in line therewith, so
that the flame of the gas-jets will impinge upon the water-tube that lies directly over
said gas-jets; each of said water-tubes being provided with a hood which will compel
the flames of said gas-jets to envelope the water-tube, to which said hood is
appropriated, before the heated products of combustion from said flames are permitted
to escape frou said water-pipe; and our invention further consists in a modified form
of said hoods, so that each hood will itself form a water-tube which overlies an
ordinary water-tube, and each will contain a water-space that has at each end an
open communication with the water-legs, or other convenient points of the boiler,
whereby the flame and heated products of combustion are more fully utilized for the
production of steam.
As represented in the drawing, A designates the heads at the opposite ends of
the boiler, which heads are provided with water-spaces through which the water has
ample space for a free circulation, and by which-by reason of the water absorbing a
arge portion of the heat that would otherwise be wasted by radiation--a great loss of
eat is prevented.

page_text: B the steam and water cylinders, of which there may be one or several, which
connect together the upper portion of the heads A so that a free circulation of steam
and water may be maintained between the water-spaces of said heads.
C the water-tubes, of which there may be several tiers of several tubes in each tier,
and which form an open connection between the water-spaces of the two heads A, so that
a free circulation of water between said heads will be amply provided for; preferably
said water-tubes are slightly inclined upwardly from the rearmost head to the foremost
one, for the purpose of providing for a perfectly free circulation of water through said
water-tubes from the rear towards the front of the boiler.
D the gas-tubes, each of which is provided with several groups, 1, of perforations,
the portion of said tube shown in Fig. 4 showing only one of said groups;
said gas-
tubes are fixed directly under the water-tubes C-so that each water-tube will have
one of the gas-tubes directly under it and are ranged in line therewith; one end of
each gas-tube projects through one of the heads A and is connected with the source of
gas-supply in the usual manner.
E the air-tubes which are preferably fixed in the bore of the gas-tubes D, and so
that one end of each air-tube will project from the corresponding end of the gas-tube.
in which it is fixed; the projecting ends of said air-tubes are preferably connected to
a pipe from which a supply of air-under pressure-can be obtained; each of said
air-tubes is provided with a series of nipples, 2, each of which is so arranged that one
of said nipples will be located in the center of a group of the perforations in the gas-
tubes D. By this arrangement of orifices for the discharge of the gas and air we are
able to produce a blow-pipe effect for the jets of flame upon the water-tubes, that is to
say, we are able to obtain an intensity of heat from said jets that is not obtainable
when the gas is burned in the ordinary manner.
F the hoods which are placed over each water-tube for the purpose of compelling
the flame of the gas-jets to envelope the water-tubes; said hoods are made in the
form of an inverted-trough of such size as to leave a clear space around the water-
tube, and for the purpose of providing means for the escape of the heated products
of combustion from the under side of the hoods, and for suspending them in position-
each hood is provided with a series of escape-pipes, 3, which extend upwardly from
the apex of the hood, and have their upper ends secured in a baffle-plate, 5, which is
interposed between the upper tier of the water-tubes C and the lower side of the
steam and water cylinders B; the escape-pipes for the lower tiers of hoods are
provided with an off-set, as shown in Fig. 2, for the purpose of avoiding an inter-
ference with the next tier above; the heated products of combustion which pass
upwardly through the escape-pipes 3 impinge against the steam and water cylinders B,
and are there utilized in the generation of steam in said cylinders; after such
utilization the products of combustión-now quite thoroughly spent-are permitted to
escape, through an outlet 6, to a chimney.
In the modification of the hood F shown in Fig. 3, said hood is composed of an
upper and lower arch which are secured at their lower edges to form, in their
transverse section, a crescent-shaped chamber, G, for containing water; said chamber
communicates at the opposite ends with the water-spaces of the heads A so as to
obtain a free circulation of water through said hoods.
H escape-pipes which are provided for carrying off the excess of air that may be
admitted in the space beneath the baffle-plate 5, and which has not been utilized in
the process of combustion; said escape-pipes have their lower ends secured in
openings in the buffle-plate 5, and their upper ends secured in openings in the
top-plate 4, and the air from said escape-pipes may be conducted through a suitable
flue to a chimney.
The operation of our boiler is as follows: The boiler being properly charged with
water, the gas-jets are lighted and their flames impinge on the water-tubes C; the
air escaping from the nipples 2 commingles with the burning jets of gas as they
are emitted from the perforations of the gas-pipes D and thereby the heat from said
jets is greatly intensified; the hoods F compel the flames and heated products of
combustion from said gas-jets to envelope the water-tubes C and produce a rapid

page_text: generation of steam therein; the steam and heated water from said water-tubes pass,
through the water-spaces of the heads A, into the cylinders B, while the colder water
from said cylinders fall downward to occupy the spaces formerly occupied by the
heated water in the water-tubes C; the heated products of combustion from beneath
the hoods F, which pass upwardly through the escape-pipes 3 into the chamber formed
by the baffle-plate 5 and top-plate 4, escape from said chamber through the outlet 6 into
a chimney by which they are disseminated into the atmosphere.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed, we declare that what we claim is―
1. A water-tube steam-generator having gas-burners arranged under the water-tubes,
and hoods or bonnets arranged over said water-tubes; said hoods or bonnets having
conduits leading from them, and the exit ends of said conduits terminating beyond
the spaces formed between the water-tubes, substantially as described.
2. A water-tube steam-generator having gas-burners arranged under the water-
tubes, and hoods arranged over said water-tubes; said hoods having conduits leading
from them, and the exit ends of said conduits terminating in a chamber above said
water-tubes, substantially as described.
3. A water-tube steam-generator having gas-burners arranged under the water-
tubes, and hoods or bonnets arranged over said water-tubes; said hoods or bonnets
having conduits leading from them, and a partition or baffle-plate laid over said
water-tubes and below the steam and water cylinders; said baffle-plate or partition
having openings through which said conduits pass, substantially as described.
4. A water-tube steam-generator having gas-burners arranged under the water-
tubes, and hoods or bonnets arranged over said water-tubes; said hoods or bonnets
having conduits leading from them, and a partition or baffle-plate laid over the water-
tubes and below the steam and water cylinders; said partition or baffle-plate having
openings through it into which the exit ends of said conduits are entered, and also
having other openings into which are fixed other conduits whose exit ends terminate
beyond the enclosed portion of the generator, substantially as described.
5. A water-tube steam-generator having water-tubes, and hoods or bonnets arranged
over said water-tubes, and gas and air supply-tubes arranged under said water-tubes;
said gas and air supply-tubes having apertures by which the flames of the burning
gas-jets will be forcibly impinged against said water-tubes, substantially as described.
6. A water-tube steam-generator having gas-burners arranged under the water-
tubes, and hoods or bonnets arranged over said water-tubes; said hoods or bonnets
having openings in them and conduits leading from said openings, substantially as
described.
7. The combination, with the tubes of a tubular heating device, of a hood or bonnet
arranged above the heating-tubes, and burners arranged under the heating-tube's ; said
hoods or bonnets having openings in them, and conduits leading from said openings,
substantially as described.
8. A steam-generator having water-tubes and a furnace arranged under said water-
tubes for heating them, and hoods or bonnets arranged over said water-tubes; said
hoods or bonnets being conduits and connected with the generator so that the water in
the generator will circulate through the generator, the hoods, and the water-tubes,
substantially as described.
9. A steam-generator having water-tubes, and hoods or bonnets arranged over said
water-tubes; said hoods or bonnets being conduits and connected with the generator
so that the water in said generator will circulate through the generator, the hoods, and
the water-tubes; said hoods having passage-ways through them for the escape of the
products of combustion, and a furnace arranged under the water-tubes for heating the
same, substantially as described.
10. In a steam-generator, a water-tube having gas-burners arranged in proximity
to it for the purpose of heating said water-tube, and a hood or bonnet arranged over
said water-tube; said hood or bonnet being a conduit and having passage-ways
through it for the escape of the products of combustion; said hood and said water-tube

page_text: being so connected that the water contained in the generator will circulate through
them when heated, substantially as described.
11. In a steam-generator, a water-tube having a hood or bonnet arranged over it;
said hood or bonnet being a conduit and having openings through it for the escape of
the products of combustion, and heat-producing burners arranged under said water-
tube for heating the same; said water-tube and said hood being connected with the
generator so that the water in said generator, hood, and water-tube will circulate
through them when heated, substantially as described.
Dated this 20th day of November 1888.
HERBERT J. ALLISON,
Agent for the Applicants.