IMPROVEMENTS IN REGENERATIVE LAMPS AND GAS-BURNERS
Year: 1883

page_text: LETTERS PATENT to Carl Pieper, Civil-Engineer and Patent Agent, resident
at 109-110 Gneisenaustrasse, Berlin S.W. Prussia, for an Invention of
"IMPROVEMENTS IN REGENERATIVE LAMPS AND GAS-BURNERS a communication
to him from H. Studer of Paris, Engineer,
PROVISIONAL SPECIFICATION left by the said Carl Pieper at the Office of
the Commissioners of Patents on the 14th June 1883.
CARL PIEPER, Civil Engineer and Patent-Agent resident at 109/110 Gneisenau-
Strasse Berlin S.W, Prussia, "IMPROVEMENTS IN REGENERATIVE LAMPS AND
GAS-BURNERS," a communication to me from H Studer, of Paris, Engineer,
This invention relates to Improvements in Regenerative lamps and gas-burners,
that is, to lamps and gas-burners in which the air serving to feed the flame, is
previously heated by the combustion gases from the latter.
The flame is surrounded by two globes or cases of other form made of glass and
leaving a space between them which communicates near the upper end of the wick
tube or the orifice of the burner with the interior space of the inside globe or case.
At the top of the two globes or cases there are a number of vertical channels
placed in a circle and separated from each other by radial partitions of sheet metal.
Of these channels one series communicates at the bottom with the inside globe or
case, and at the top with a funnel, and thus serves to convey upward the com
bustion gases proceeding from the flame. The channels constituting the other
series, are open at the top to the outer air, and at the bottom to the space between
the two glass globes or cases; they will therefore convey downward the air required
to support the combustion of the flame.
The channels of the said two series alternate with each other. A portion of the
heat of the rising combustion gases will therefore be transmitted through the
partition walls to the descending currents of air and raise the temperature of the
latter.
.
The channels may be formed by a deeply corrugated sleeve of sheet metal, the
corrugations whereof are closed at the ends, and. which is placed between two
cylinders so arranged as to leave the requisite passages at the top and the bottom
of the corrugations.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Carl Pieper in the Great Seal Patent Office on the 8th December
1883.
CARL PIEPER, Civil Engineer and Patent-Agent resident at 109-110 Gneisenau-
strasse Berlin S.W. Prussia." IMPROVEMENTS IN REGENERATIVE LAMPS AND
GAS-BURNERS "A communication to me from H. Studer, of Paris Engineer.
This invention relates to improvements in Regenerative lamps and gas-burners;
that is, to lamps and gas-burners in which the air serving to feed the flame, is
previously heated by the combustion-gases from the latter, and the improvement
consists in the particular means by which the heating of the air is brought about.
On the annexed sheet of drawings Fig: 1 is a diagram representing the principle
of the invention. Fig 2 is a vertical section showing in detail an improved air-
heating device applied to a double Argand gas-burner. Fig 3 is a horizontal
section through the apertures e e, Fig 2, seen from below.
As shown in Fig: 1, the flame is surrounded by two globes B and C, or by cases
of other form made of glass and leaving a space between them which communicates
near the upper end of the wick-tube or the orifice of the burner A with the interior
space of the inside globe or case B. At the top of the two globes or cases there
are a number of vertical channels, such as d and d¹ placed in a circle and separated
from each other by radial partitions of sheet metal. These channels are arranged
to form two series. The channels d of one series communicate at the bottom with
the inside globe or case B, and at the top with a funnel G, and thus serve to
Convey upward the combustion-gases proceeding from the flame. The channels &
constituting the other series, and which alternate with the channels d, are open at
the top to the outer air, and at the bottom to the space between the two glass
globes or cases; they will therefore convey downward the air required to support
combustion in the flame. The currents of air and of the combustion gases are
indicated in the drawing by arrows. These currents being separated from each
other by thin metal walls only, a portion of the heat of the rising combustion-gases
will be transmitted through the partition-walls to the descending currents of air
and raise the temperature thereof.
By preference the channels are formed by means of a deeply corrugated sleeve
of sheet-metal, the corrugations whereof are closed at the ends, and which is placed
between two cylinders so arranged as to leave the requisite passages at the top and
the bottom of the corrugations. This construction is shown by Figs 2 and 3.
These
D is the corrugated sleeve, E the outer cylinder and G the inner one.
cylinders are of such length that they will leave uncovered the upper outside and
the lower inside peripherical portions of the sleeve D. At their ends the corru-
gations of D are closed by annular plates H and F. The bottom plate H is
connected to the cylinder E by bars having between them the apertures e; but it
may be made separate from E and arranged to be supported by the globe B, an
annular slit being in this case left between H and E. The plate Fis advantageously
provided with a projecting portion f turned downward so as to constitute a screen
for the air inlet-passages to the channels d. The cylinder G, whose upper part
forms the aforesaid funnel, is closed at the bottom and provided opposite to the
upper portion of the sleeve D with apertures g, by which communication is
established between the channels d and the inside of the cylinder G.-Both
cylinders are hung with projecting rims respectively on the globe C and the
plate F. It will be seen that by these means an apparatus is formed which is at
the same time effective and simple, and the parts whereof may easily be separated
and put together again.

page_text: For the
Instead of carrying out the apparatus as described, its parts may also be attached
to each other or cast together in any suitable combination and manner.
purpose of affording facilities in lighting a lamp provided with the apparatus,
suitable apertures adapted to be closed by covers, may be provided for near the
bottom of the globes. But the lighting may also be done from above through the
sleeve D after the cylinder G has been removed. With gas lamps it is moreover
possible to light the gas by setting fire to the mixture of air and gas forming
within the globe B and issuing through the channels d after the gas-cock has been
opened. In case this mode of lighting is adopted, it is, however, advantageous
to arrange some of the channels & somewhat wider than the others. A small hole
may also be made for the same purpose in the bottom of the cylinder G
Although in the described apparatus the inside globe B. operates to keep separate
the inward current of air from the combustion gases, it has been proved by
experiment that the said globe may be left away without appreciably lessening
the efficiency of the apparatus:-
Having thus described the nature and object of this invention, and the manner
in which it is to be carried out in practice, as communicated to me by my corre-
spondent, I hereby claim as new and import features of the same:
An air-heating apparatus for lamps and gas-burners consisting of two cylinders E
and G between which are arranged channels & and d' alternating with each other,
and of which the channels d are adapted to convey upward the combustion-gases
from the flame, while the channels d' conduct air downward to the flame.
In Witness whereof I the said Carl Pieper have hereunto set my hand and
seal this twenty-sixth day of November in the year of our Lord One thousand eight
hundred and eighty-three.
BADT DINDRD