Improvements in Regenerative Gas Furnaces and Gas Producers.
Year: 1889

page_text: Date of Application, 18th Dec., 1889
Complete Specification Left, 13th Sept., 1890-Accepted, 18th Oct., 1890
PROVISIONAL SPECIFICATION.
Improvements in Regenerative Gas Furnaces and Gas Producers.
I, FREDERICK SIEMENS, of 10 Queen Anne's Gate, Westminster, in the County
of Middlesex, Engineer, do hereby declare the nature of this invention to be as
follows:-
In my Specification No. 4644 of 1889 I describe a regenerative gas furnace pro-
vided with two reversible air regenerators and with a gas producer placed near to the
heating chamber, the gas producer being provided with means of supplying it with
air or with products of combustion or with both.
My present invention relates to means of supplying a gas producer attached, or
placed near, to a regenerative gas furnace, with air highly heated by drawing it from
the upper part of the regenerator supplying the furnace with heated air, or from a
separate regenerator.
The supply of heated air to the gas producer may be promoted, if required, by
artificial means such as an injector jet, or by means of a suitable damper a part or the
whole of the current of heated air from the regenerator may be diverted to the gas
producer.
The air, at its entrance into the regenerator, may be put under pressure for aiding
The gas
its onward flow to the furnace and gas producer, or to either of them.
producer may also be supplied with products of combustion or with cold air or
with both.
Regenerative gas furnaces according to this invention may be provided with
regenerators, of the reversible type, serving to heat both the air supply to the furnace
and that to the gas producer; or continuous current regenerators may be employed.
The regenerators may be arranged both at the sides and below the gas producer so as
to avoid loss of heat by reducing the exposed wall surface.
The furnace may have reversible gas and air ports in the heating chamber, or only
one gas port and two reversible ports for inflowing air and outflowing products of
combustion; or when continuous current regenerators are employed one or more gas
and air ports may be arranged in the heating chainber, also one or more outlets for
the products of combustion.
Dated this 13th day of December 1889.
CUMPLEIE DILUITIVATION
Improvements in Regenerative Gas Furnaces and Gas Producers.
I, FREDERICK SIEMENS of 10 Queen Anne's Gate, Westminster in the County of
Middlesex, 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 :—
In my Specification No. 4644 of 1889 I have described a regenerative gas furnace
provided with two reversible air regenerators and with a gas producer placed near to
the heating chamber, the gas producer being provided with means of supplying it
with air or with products of combustion or with both.
My present invention relates to means of supplying a gas producer attached, or
placed near to a regenerative gas furnace, with air highly heated by drawing it from
the upper part of the regenerator supplying the furnace with heated air, or from a
senarate regenerator.

page_text: The supply of heated air to the gas producer may be promoted, if required, by
artificial means such as an injector jet, or by means of a suitable damper, a part or
the whole of the current of heated air from the regenerator may be diverted to the
gas producer.
The air, at its entrance into the regenerator may be put under pressure for aiding
its onward flow to the furnace and gas producer, or to either of them. The gas
producer may also be supplied with products of combustion or with cold air or with
both.
Regenerative gas furnaces according to this invention may be provided with
regenerators of the reversible type, serving to heat both the air supply to the furnace
and that to the gas producer; or continuous current regenerators may be employed.
The regenerators may be arranged both at the sides and below the gas producer so as
to avoid loss of heat by reducing the exposed wall surface.
The furnace may have reversible gas and air ports in the heating chamber, or only
one gas port and two reversible ports for inflowing air and outflowing products of
combustion; or, when continuous current regenerators are employed, one or more
gas and air ports may be arranged in the heating chamber also one or more outlets for
the products of combustion.
Fig. 1 of the accompanying drawing is a longitudinal section on the line Y Y of
Fig. 2 which is a sectional plan on the line X X of Fig. 1 of one form of combined
furnace, producer and regenerators according to my present invention. A is the
furnace chamber, B one of the regenerator chambers, of which there are two
alternated in the usual way by means of the valve W which is of ordinary construction
for regenerative gas furnaces. C is the gas producer which communicates with the
chamber A by either of two passages H and gas ports D as determined by the opening
of the one or the other of two valves V. The hot air from the regenerator B flows
partly by the flue and passage F to the furnace port E where it meets the gas from D,
producing a flame which sweeps round the chainber A in horse shoe form from the
one port E to the other port E. Part of the hot air from the regenerator B is caused
by the action of a steam jet K to pass to the producer C at the one side, while, at the
other side, a portion of the products of combustion on their way from the furnace
chamber to the other regenerator are caused by a steam jet K¹ also to enter the gas
producer C. By regulating the steam jets K and K¹, any desired proportions of the hot
air and of the hot products of combustion can be supplied to the producer C, and the
passages thereto, when required inay be altogether closed by valves U. A proportion
of cold air may also be supplied to the producer by means of an auxiliary steam jet J
causing air to enter the producer if required.
Fig. 3 is a longitudinal section of a similar furnace, shewn as applied for reheating
ingots I arranged vertically. In this case, instead of employing a steam jet K to
cause hot air to flow from the regenerator B to the producer C, the air is supplied to
the furnace under pressure, being conveyed by a pipe M from a blower or pump to the
valve W whence it passes to the one or the other of the two regenerator chambers B.
Thence the hot air passes partly by the flue F to the furnace chamber A, and partly
to the gas producer C the quantities being regulated by a suitable damper in F or by
the valve U.
Fig. 4 is a central longitudinal section and Fig. 5 is a transverse section on Z Z of
a combined furnace and producer with a regenerator of the continuous kind, con-
sisting of a number of zig-zag flues N through which the hot products of combustion
pass from the furnace chamber A, with corresponding flues N' between and alternating
with them, through which air passes in the opposite direction to the furnace chamber
or to the gas producer C or partly to each. Some of the air flues N¹ may be
appropriated exclusively to the supply of the gas producer with hot air.
The hot air and the gas from the producer Center the furnace chamber A by both
the ports F and D on the one side and F¹ and D¹ on the other side, and the
flames sweep round in horse shoe form to the central outlet port O leading to the
flues N.

page_text: By means of a steam jet K¹ a portion of the hot products of combustion may be
supplied to the producer C, and similarly a portion of the heated air from the
regenerator flues may be supplied to the producer.
Fig. 6 is a transverse section of a furnace chamber with the ports arranged for
alternating regenerators B B¹. In this case the gas from the producer always enters
the chamber A by the central port D, the two side ports E E¹ acting alternately for
supply of hot air from one of the regenerators, and for the discharge of products of
combustion to the other regenerator.
Although I have shewn in the drawings furnaces having only one producer and one
set of appropriate flues and ports, obviously these ports might in many cases be
duplicated by arranging a second set at the opposite end of the furnace chamber.
Obviously also, instead of employing only one set of regenerators for both the
furnace chamber and the gas producer, separate sets of regenerators might be arranged,
one set to supply the furnace chamber with air and one set to supply the producer
with air at approximately the same temperature.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is
In combination with a regenerative gas furnace, having regenerators for heating
air only, a gas producer near to the furnace chamber with means of supplying the
producer, with heated air from the upper part of the regenerator or from a separate
regenerator heating the air approximately to the same temperature, and also means of
supplying the producer at the same time with hot products of combustion from the
furnace, or with cold air, in any desired proportions, substantially as described.
Dated this 13th day of September 1890.
ABEL & IMRAY,
Agents for the Applicant.