Improvements in and relating to Gas-lamps.
Year: 1892

page_text: Date of Application, 7th Nov., 1892
Complete Specification Left, 5th Aug., 1893-Accepted, 9th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in and relating to Gas-lamps.
I, ULYSSE MANTRANT, of 57 Rue Mozart, Paris, in the Republic of France,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to a gas-lamp which possesses the advantage, as compared
with the lamps heretofore employed, of realizing a saving of gas and an increase of
lighting power by the use of improved apparatus designed for recovering part of
the heat of the flame.
This apparatus is characterized essentially by the horizontal or nearly horizontal
arrangement of the recuperating chamber, by the combination of two concentric
glass bells between which the hot air descends for feeding the burner directly below
the flame, and also by the cock which controls the supply of the gas to the burner.
This lamp may either be arranged at the upper part of a pillar or suspended;
the arrangement is in principle the same, there are only some secondary differences
in the construction.
In both arrangements of my lamp the burner is provided in the interior of a
double bell. Between these bells descends the air coming from the recuperating
chamber, an aperture provided in the lower part of the interior bell allowing the
air to pass out directly below the flame. Above the burner is arranged a central
deflector which is conical in one arrangement and has a parabolic curvature in the
other arrangement; in one instance there is a second deflector in the interior,
and in the other instance there is a second deflector on the outside of the lamp.
The recuperator constitutes either a horizontal chamber or a slightly inclined
chamber enclosing a disc above and below which circulates the air which is heated.
The sides and the disc of the recuperator are heated by conductibility of the heat
received by a crown forming the base of the chimney which is strongly heated by
the products of combustion.
From the outside the cold air passes through a series of apertures at the bottom
of the recuperating chamber into the latter, round the aforesaid disc and through a
second series of apertures in the said bottom between the bells in order to arrive
through apertures at the lower end of the interior bell below the burner, whilst
the hot products of combustion rise between the deflector and the crown which is
protected by a cap against wind.
In the crown which forms the bottom of the recuperating chamber are provided
apertures for the inlet of the cold air and other apertures for the outlet of the hot
air, and circular grooves designed to receive packing material so as to form an air-
tight joint between the glass bells and the bottom of the recuperator.
The improved gas lamp is adapted either to be placed upon a pillar or to be
suspended by rods. In both cases it may have a lantern provided round the two
glass bells.
I may also provide a deflector on the outside of the lantern. The two bells
suffice for preventing the breakage of either of them under the action of a current
of air, because the outer bell is never sufficiently hot to break by sudden cooling
and this outer bell protects the inner bell against cooling from the outside.
The arrangement of the burner may be varied, the jets of the crown provided
being either arranged vertically or horizontally. In the latter case the jets are
arranged in several superposed series so as to form a kind of stepped burner having
a conical surface. A more beautiful effect is obtained by distributing the jets so
that the flames of a series encounter each other and that the jets of two superposed
series have a lozenge like arrangement.

page_text: Moreover I obtain a prettier effect, a group of fuller flames, by arranging the
butterfly jets a little obliquely.
The tube for the admission of gas to the burner may be arranged either
vertically or horizontally. In the latter case the said tube is protected from the
flame by the central deflector and a disc which covers the latter, and it is
protected by a non-conducting casing against the heat of the hot air leaving the
recuperator.
I may arrange the cock which serves to control the supply to the burner either
vertically or horizontally, but the interior construction remains the same. This
cock comprises a box in which the plug turns. Before the gas reaches the plug
it finds a small independent conduit which supplies a little gas to the central jet
and enables it to burn as a night lamp, a screw serving to regulate the passage of
gas through this conduit. The box pierced with two conduits, one of which also
supplies the central jet with enough gas for using it as a night lamp, whilst the
other conduit carries a transverse branch terminating in the annular chamber which
supplies the exterior or radiating jets of the burner. The plug of the cock has
two ways corresponding to two ways in the box.
Dated this 7th day of November 1892.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in and relating to Gas-lamps.
1, ULYSSE MANTRANT, of 57 Rue Mozart, Paris, in the Republic of France,
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 :-
.
My invention relates to gas lamps by means of which a considerable saving of
gas and an increase of lighting power is effected as compared with the lamps
heretofore employed, this result being obtained by the use of improved apparatus
designed for recovering part of the heat of the flame. The said apparatus is
characterized essentially by the horizontal or nearly horizontal arrangement of the
recuperating chamber, by the combination of two concentric bell shaped glasses
between which the hot air descends for feeding the burner directly below the
flame, and also by the cock which controls the supply of gas to the burner.
This lamp may either be arranged on a pillar or it may be suspended from any
suitable point, the arrangement being the same in principle in each case and the
construction differing only in some secondary points.
In the accompanying drawing
Figures 1 and 2 represent a vertical section and a horizontal section respectively
of a lamp adapted to be carried by a column, or pillar.
Figure 3 is a vertical section of a lamp designed to be suspended from any
suitable support.
Figure 4 is a plan of the burner shown in Figure 3.
Figure 5 is a side view of the said burner.
Figure 6 is a vertical section drawn to an enlarged scale of the three-way cock
shown in Figures 1 and 2 and
Figure 7 is an horizontal section of the same on the line 12 of Figure 6.
In both modifications of my lamp the burner is arranged in the interior of a
bell-shaped glass or globe A having a similarly shaped glass or globe B arranged
on the outside thereof forming a passage for the air coming from the recuperating
chamber. An aperture is provided in the lower part of the interior glass or
globe A which allows the air to pass into the inner globe A directly below the
flame. Above the burner is arranged a central deflector C which is made conical
as shown in Figure 1 or parabolic as shown in Figure 3. A second deflector is

page_text: arranged at D Figure 1 in the interior of the lamp, and in the other modification
is arranged a deflector E on the outside of the lamp as shown in Figure 3.
The recuperator consists either of a horizontal chamber F Figure 1 or the said
chamber may be inclined as shown in Figure 3. each enclosing a disc b above and
below which the heated air circulates. The sides and the disc of the recuperator
are heated by conduction through the crown forming the base of the chimney.
which is strongly heated by the products of combustion.
The cold air from the outside passes through a series of apertures d at the
bottom of the recuperating chamber F into the latter, round the aforesaid disc b,
and through a second series of apertures e in the said bottom between the glasses
or globes A B and then through the apertures a at the lower end of the interior
glass or globe below the burner, whilst the hot products of combustion rise
between the deflector C and the crown e and pass through the chimney G which
is protected by a cap H against the wind.
In the plan Figure 2 I have shown how the plate which forms the bottom of
the recuperating chamber is constructed dddd are the apertures for the inlet of
the cold air and ee ee are other apertures for the outlet of the hot air, fare
circular grooves designed to receive packing material so as to form an air-tight
joint between the glasses or globes and the bottom of the recuperator.
The improved gas lamp is adapted either to be placed upon a pillar as in
Figure 1 or to be suspended by rods J J as in Figure 3. In both cases the
glasses or globes may be enclosed in a lantern L as shown in Figure 1.
I may also if desired provide a deflector on the outside of the lantern shown in
Figure 1. The two globes suffice for preventing the breakage of either of them
under the action of a current of air, because the outer, globe is never sufficiently
hot to break by sudden cooling and this outer globe protects the inner one against
cooling from the outside.
The arrangement of the burner X may be varied, the jets being either arranged
vertically as in Figure 1 or horizontally as in Figure 3. In the latter case the
jets are arranged in several superposed series so as to form a kind of stepped
burner having a conical surface. A more beautiful effect is obtained by distributing
the jets so that the flames of a series encounter each other and that the jets of
two superposed series have a lozenge like arrangeinent.
Moreover I obtain a prettier effect, a group of fuller flames, by arranging the
butterfly jets a little obliquely as shown in Figure 5.
The tube for the admission of gas to the burner may be arranged either
vertically as in Figure 1 or horizontally as in Figure 3. In the latter case the said
tube is protected from the flame by the central deflector C and a disc which
covers the latter, and it is protected by a non-conducting casing against the heat
of the hot air leaving the recuperator.
I may arrange the cock which serves to control the supply to the burner either
vertically as in Figure 1 or horizontally as in Figure 3 but the interior con-
struction remains the same. This cock, see the detail views Figures 6 and 7,
comprises a box M in which the plug N turns. The gas enters at i and before
reaching the plug it passes through a small independent conduit j which supplies a
little gas to the central jet k and enables it to burn as a night light, a screw /
serving to regulate the passage of gas through this conduit.
The box M is provided with two conduits, one m of which also supplies the
central jet k with enough gas for maintaining a small night light whilst the other
conduit has a transverse branch o terminating in the annular chamber which
supplies the exterior or radiating jets of the burner. The plug N of the cock has
two passages q and r corresponding to the two passages in and n in the box.
P
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:
-
The herein described improvements in gas lamps comprising an horizontal or

page_text: inclined recuperating chamber, the metallic sides of which are heated by the
products of combustion, the air for supporting combustion being heated by contact
with the said sides and then conducted between two concentric glasses or globes
surrounding the burner finally passing up through an aperture at the base of the
interior glass or globe directly below the burner, to which the gas is supplied by a 5
three way cock having an independent conduit, the said lamp being adapted to be
either carried by a pillar or column or suspended, as hereinbefore set forth.
Dated this 5th day of August 1893.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.