Improvements in and connected with Furnaces for Burning Liquid Fuel.
Year: 1890

page_text: Date of Application, 8th Feb., 1890
Complete Specification Left, 8th Dec., 1890-Accepted, 10th Jan., 1891
PROVISIONAL SPECIFICATION.
Improvements in and connected with Furnaces for Burning Liquid
Fuel.
We, CARL ADOLPH SAHLSTRÖM of 10 Colville Gardens, Bayswater, in the County
of Middlesex, Engineer, and ALEXANDER FRASER HILL, of 9 Sackville Road, West
Brighton in the County of Sussex Gentleman do hereby declare the nature of this
invention to be as follows
Fire chambers of cupolas having widened lower portions at the base have had the
upper portion of these chambers arranged vertically or nearly so above the said
widened lower portions, now according to our; present invention we construct the
upper portion of the said chambers at an angle varying according to the nature of the
material to be melted; we have found an angle of 60° or 45° to answer the purpose,
although we do not limit ourselves to such angles.
The base of the fire chamber is enlarged and is made with a dome shaped roof
through which and at or about the centre thereof the flue or upper portion of the fire
chamber (which may be narrowed at this' part) arranged at an angle as before stated,
communicates.
The top of the angular fire chamber is in communication with a flue preferably
vertical in which there is a coil of steam pipes to superheat steam to be utilized for the
supply of the hydrocarbon burners which are inserted in the enlarged or widened
portion of the fire chamber.
There is a charging door at the top of the angular fire chamber with sight hole
therein and a platform or gallery is arranged for facilitating feeding and attending,
and beneath the platform and the angular chamber there is a support for sustaining
the weight of the structure.
The brickwork of which the cupola is constructed should be lined on the outside
with iron, and on the front or side opposite the gallery there is an air space or chamber
between the brickwork and the iron lining to which air is admitted at the upper part
which being caused to circulate through the said chamber is utilized at the base for
the hydrocarbon burners, which latter are arranged round the dome through which
they pass with a downward inclination, and the number of these burners varies
according to the size of the furnace and the quantity of ore to be melted. In the
angular chamber there are one or several apertures communicating with the air
circulating passages before referred to. In connection with the enlarged and widened
lower portion of the melting chamber there may be arranged a fixed or movable
receiver for the molten metal, the upper portion of which may be arranged for heating
air for the supply of the hydrocarbon burners or for other purposes.
Dated this 8th day of February 1890.

page_text: COMPLETE SPECIFICATION.
Improvements in and connected with Furnaces for Burning Liquid
Fuel.
We, CARL ADOLPH SAHLSTRÖM of 10 Colville Gardens Bayswater in the County of
Middlesex Engineer and ALEXANDER FRASER HILL of 9 Sackville Road West
Brighton in the County of Sussex Gentleman 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 :-
Fire chambers of cupolas having widened lower portions at the base have had the
upper portion of these chambers arranged vertically or nearly so above the said
widened lower portions now according to our present invention we construct the
upper portion of the said chambers at an angle varying according to the nature of the
material to be melted. We have found an angle of 60° or 45° to answer the purpose,
although we do not limit ourselves to such angles.
.
In order that our invention may be fully understood and readily carried into effect
we will further describe same with reference to the accompanying drawings.
Figure 1 is a vertical section of a furnace for burning liquid fuel constructed
according to our invention.
Figure 2 is a plan of the charging door and vertical flue.
Figure 3 is a cross section on the line X Y of Figure 1 and
Figure 4 is a horizontal section at the base of the furnace showing the position the
hydrocarbon burners occupy.
Similar letters of reference refer to like parts in all the figures.
The base of the fire chamber A is enlarged as shown and is made with a dome
shaped roof A through which and at or about the centre thereof the flue or upper
portion B of the fire chamber (which may be narrowed at this part) arranged at an
angle as before stated communicates. The top of the angular fire chamber is in com-
munication with a flue C preferably vertical in which there is a coil of steam pipes D
to superheat steam to be utilized for the supply of the hydrocarbon burners
which are inserted in the enlarged or widened portion of the fire chamber as
and where shown by the letters E E E E. The burners must be capable of adjustment
in these tubes so that they be kept at such distance from the metal that the fuel may
be converted into burning gases before striking the metal. There is a charging door F
at the top of the angular fire chamber B with sight hole therein and a platform or
gallery G is arranged for facilitating feeding and attending and beneath the platform
and the angular chamber there is a support H for sustaining the weight of the structure.
The brickwork of which the cupola is constructed should be cased on the outside with
iron I and on the front or side opposite the gallery there is an air space or chamber J
between the brickwork K and the iron casing to which air is admitted at the upper
part which being caused to circulate through the said chamber J is utilized at the base
for the hydrocarbon burners which latter are arranged round the dome through which
they pass with a downward inclination as shown at E and the number of these burners
varies according to the size of the furnace and the quantity of ore to be melted
although not shown the chamber J may be extended upwards by the vertical flue C.
In the angular chamber B there are two or several apertures one being shown at
Figure 1 marked K₁ communicating with the air circulating passages J¹ the air
entering the passages J¹ at apertures J³ at the base L is the pipe by which atmospheric
air is admitted under pressure to the air passages J which air passage leads down to
the lower part and supplies hot air to a circular tube M running round the furnace for
supplying the burners with hot air. The position of the pipe I must be changed when
the passage J extends to the vertical flue C viz. to the top of the said passage J. In
connection with the enlarged and widened portion of the melting chamber there may
be arranged a fixed or movable receiver for the molten metal the upper portion of
which may be arranged for beating air for the supply of the hydrocarbon burners or
for other purposes.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is.
First. In furnaces for burning liquid fuel the arranging of the upper portion of the
chamber of such furnace at an angle of from say 45° to 60° and substantially as described
and illustrated with reference to the accompanying drawings.
Second. In furnaces for burning liquid fuel the inclined fire chamber B having
enlarged base and dome shaped roof in combination with the air space or chamber J
substantially as and for the purposes hereinbefore described and illustrated with
reference to the accompanying drawings.
Third. In furnaces for burning liquid fuel when set at an angle of from 45 to 60° or
thereabouts the combination therewith of an enlarged fire chamber A provided with
hydrocarbon burners E dome shaped roof A¹ inclined flue or upper portion B with
contracted base and vertical flue C containing superheating steain pipes D charging
door F and air space or chamber J communicating with atmosphere by pipe Land
with the hydrocarbon burners at E together with air chambers J₁ communicating with
the interior of the inclined chamber B all constructed arranged and acting substan-
tially as hereinbefore described and illustrated with reference to the accompanying
drawings.
Fourth. In furnaces for burning liquid fuel the general construction arrangement
and combination of parts in combination with the inclined furnace chamber B substan-
tially as hereinbefore described and illustrated with reference to the accompanying
drawings.