Petroleum Incandescent Lamp Burner.
Year: 1899

page_text: Date of Application, 13th Mar., 1899
4
PROVISIONAL SPECIFICATION.
Petroleum Incandescent Lamp Burner.
We, JULIUS BRAUNSCHILD, Student of Chemistry, of 22, Arnulfstrasse, and
JULIUS KIRCHHOFER, Consul, of 2, Prinzregentenstrasse, both of Munich, Bavaria,
in the Empire of Germany, do hereby declare the nature of this invention to be
as follows:
а
The object of this invention is a petroleum incandescent lamp with a burner,
which can be easily applied to petroleum lamps furnished with round burners.
Fig. 1 of the accompanying drawings is a vertical section of the new lamp.
Fig. 2 a side view, and Figs. 3 and 4 are cross sections on the lines a-b, c,
respectively.
It is known that a wire screen or perforated metal sheet may draw so much
heat from a flame that the burning of the gas does not extend beyond the upper
part of the screen. It is quite true that use has been made of this property of
the wire screen to produce petroleum gas and therewith petroleum incandescent
light. Attempts have heretofore been made having that end in view; in one
attempt, by means of a perforated cap, certainly an incomplete combustion is
brought about in the lower part thereof, and the unburnt gas is compelled to
flow to the upper part of the cap. The flame produced on the wick, when a
curved or arched wire screen of the kind is employed, is illuminating and there-
fore the screen in a short time becomes smoked or sooty, so that, finally, no more
gas can penetrate through it.
This difficulty can be obviated by placing a flat or slightly bent-under wire
screen or perforated sheet metal on the upper edge of the wick. Hereby a small
blue flame is produced on the inside of the wick, which does not smoke the wire
screen, so that the combustion can proceed constantly.
The construction of the new apparatus is as follows. A flat wire screen
which rests on the upper edge of the wick whilst the lamp is burning, is moved
upwards and downwards by means of the wick in a cylindrical guide 6 made of
perforated sheet metal. This guide is one furnished with an internally project-
ing flange c of sheet metal, the breadth of which is precisely such that it comes
almost into contact with the outer wick tube. This guide casing 6 forms, by
means of the circular disc d, with the casing c, the chamber.f. The sheet metal
casing e is likewise surrounded by a casing &, in which the former is adjustably
arranged by means of a bayonet closure gg', or the like. The inner sheet metal
casing e is shut off at the top by a plate h, which is furnished on the outer edge
with holes i. Above the plate h the chamber f narrows into the chimney . in
which two semi-circular plates are placed at a distance apart from each other.
The closing of the new apparatus is formed by a conical wire, or perforated
sheet metal screen m shut off at the top, which is arranged on the upper edge of
the chimney in such a manner that there is but a very small space between the
upper edge of the chimney and the wire screen. The incandescent mantle n or
Price 81

page_text: its holder o is fixed, together with the holder for the cylinder p, to a tube which
is placed over the chimney k.
The production of the petroleum incandescent light is effected thus:-After
the casing o has been raised up and fixed, and a spirit round burner put on the
chimney, the wick is lighted through the openings in the casing e. In this
position the wick is allowed to burn with a very small flame, whereby the burner
is to some extent preliminarily heated. Hereupon, the apparatus is lowered to
about the position indicated by the letter g and the wick turned up somewhat so
that the flame, hitherto burning only on the upper edge of the wick, extends to
the inner and outer edge of the same. The apparatus is now let down completely,
so that the sheet metal flange e almost entirely shuts off the outer edge of the
wick from the supply of air. In consequence of this, the flame on the outer edge
of the wick goes out, whilst on the inner edge of the wick the flame is quite small
and completely blue, the wire screen a being on the upper edge of the wick. The
result of this is that the gas on the outside of the wick flows away. Through
the openings of the perforated guiding cylinder b, air now flows below the flange c
into the chamber f. is there considerably heated, and mixes with the gas flowing
over the flange c to the chamber f. The air is thus conveyed sideways into the
chamber f, in order that it may hold back the gas there as long as possible and
mix thoroughly with it. In order to render the mixing of the gas and air
more complete,, the gas must be retarded at the plate and can only then be drawn
off through the holes i to the chimney k. Here the mixture of petroleum gas
and air is forced by the semi-circular plates to mix still further, after which it
reaches the shut-off conical perforated sheet metal or wire screen m, and outside
of the same, brings the incandescent mantle n into a luminous condition. Here-
upon, the upper edge of the chimney becomes heated and transmits the heat to
all parts in connection with it. The new lamp, further, is regulated like an
ordinary petroleum lamp, by means of an adjusting pinion t. Any undue turn-
ing up of the wick however, whereby the incandescent body would be caused to
smoke, is avoided by a suitable contrivance u which acts on the wire screen.
The spirit round burner is not indispensably necessary for igniting the lamp,
but serves chiefly for consuming the petroleum vapors given off during the pre-
liminary heating and thereby obviates the disagreeable smell.
The lamp is extinguished by lowering the wick, so that the wire screen a rests
on the wick casing, whereupon no further gas is generated.
Dated this 134th day of Moral 1900
HARRIS & MILLS,
23, Southampton Buildings, London, W.C., Agents.
retroleum incandescent Lamp Burner.
We, JULIUS BRAUNSCHILD, Student of Chemistry, of 22, Arnulfstrasse, and
JULIUS KIRCHHOFER, Consul, of 2, Prinzregentenstrasse, both of Munich, Bavaria,
in the Empire of Germany, do hereby declare the nature of this invention, and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
-
The object of this invention is a petroleum incandescent lamp with a burner,
which can be easily applied to petroleum lamps furnished with round burners...
Fig. 1 of the drawings accompanying our Provisional Specification is a vertical
section of the new lamp.

page_text: Figs. 3 and 4 are cross sections on the lines ab, c-d, respectively.
It is known that a wire screen or perforated metal sheet may draw so much
heat from a flame that the burning of the gas does not extend beyond the upper
part of the screen. It is quite true that use has been made of this property of
the wire screen to produce petroleum gas and therewith petroleum incandescent
light. Attempts have heretofore been made having that end in view. In one
attempt, by means of a perforated cap, certainly an incomplete combustion is
brought about in the lower part thereof, and the unburned gas is compelled to
flow to the upper part of the cap. The lame produced on the wick. when a
curved or arched wire screen of the kind is employed, is illuminating and there-
fore the screen in a short time becomes smoked or sooty, so that, finally, no more
gas can penetrate through it. This difficulty can be obviated by placing a flat or
slightly concave wire screen or perforated sheet metal on the upper edge of the
wick. Hereby a small blue flame is produced on the inside of the wick, which
does not smoke the wire screen, so that the combustion can proceed constantly.
The construction of the new apparatus is as follows: A flat wire screen a,
which rests on the upper edge of the wick whilst the lamp is burning, is moved
upwards and downwards by means of the wick in a cylindrical guide b made of
perforated sheet metal. This guide b is one furnished with an internally project-
ing flange c of sheet metal, the breadth of which is precisely such that it comes
almost into contact with the outer wick tube. This guide casing forms, by
means of the circular disc d, with the casing e, the chamber f. The sheet metal
casing e is likewise surrounded by a casing o', in which the former is adjustably
arranged by means of a bayonet closure g g¹, or the like. The inner sheet metal
casing is shut off at the top by a plate h, which is furnished on the outer edge
with holes i. Above the plate the chamber f narrows into the chimney. k, in
which two semi-circular plates are placed at a distance apart from each other.
The closing of the new apparatus is formed by a conical wire or perforated
sheet metal screen m shut off at the top, which is arranged on the upper edge of
the chimney in such a manner that there is but a very small space between the
upper edge of the chimney and the wire screen. The incandescent mantle ng or
its holder o, is fixed, together with the holder for the cylinder 2, to a tube
is placed over the chimney k.
The production of the petroleum incandescent light is effected thus. After
the casing & has been raised up and fixed and a spirit round burner put on the
chimney k, the wick is lighted through the openings in the casing e. In this
position the wick is allowed to burn with a very small flame, whereby the burner
is to some extent preliminarily heated. Hereupon, the apparatus is lowered to
about the position indicated by the letter g' and the wick turned up somewhat, so
that the flame hitherto burning only on the upper edge of the wick, extends to
the inner and outer edge of the same. The apparatus is now let down completely.
so that the sheet metal flange e almost entirely shuts off the outer edge of the
wick from the supply of air. In consequence of this the flame on the outer edge
of the wick goes out, whilst on the inner edge of the wick the flame is quite small
and completely blue, the wire screen a being on the upper edge of the wick. The
result of this is that the gas on the outside of the wick flows away. Through
the openings of the perforated guiding cylinder b, air now flows below the flange
into the chamber f, is there considerably heated and mixes with the gas flowing
over the flange c to the chamber f. The air is thus conveyed sideways into the
chamber f in order that it may hold back the gas there as long as possible and
mix thoroughly with it. In order to render the mixing of the gas and air
more complete, the gas must be retarded at the plate and can only then be drawn
off through the holes to the chimney . Here the mixture of petroleum gas
and air is forced by the semi-circular plates to mix still further, after which it
reaches the shut-off conical perforated sheet metal or wire screen mand, outside
of the same. brings the incandescent mantle n into a luminous condition. Here-
9
which
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6

page_text: ироп,
the upper edge of the chimney becomes heated and transmits the heat to
all parts in connection with it.
The new lamp, further, is regulated like an ordinary petroleum lamp by means
of an adjusting pinion t. Any undue turning up of the wick however, whereby
,the incandescent body would be caused to smoke, is avoided by a suitable con-
trivance which acts on the wire screen..
The spirit round burner is not indispensably necessary for igniting the lamp,
but serves chiefly for consuming the petroleum vapours given off during the pre-
liminary heating and thereby obviates the disagreeable smell.
The lamp is extinguished by lowering the wick so that the wire screen a rests
on the wick casing, whereupon no further gas is generated.
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 petroleum incandescent lamp burner in which a blue evaporation flame is
produced on the inside of the wick by means of a flat or slightly concave wire or
perforated sheet metal screen which is seated on the upper edge of a round wick
burner and can be raised a certain height in a perforated guide casing by means of
the wick, whilst the outside of the wick remains shut off by the flange c from the
direct supply of air, and in which the gas produced is mixed with air in a cham-
ber by means of side inlets and, after passing a plate h furnished with holes i,
and the semi-circular plates 7 arranged at a distance apart one above the other,
is burnt with a blue flame above a conical wire screen m, which brings the incan-
descent mantle to a luminous condition and at the same time warms the chimney k
and thereby also all parts in connection therewith, substantially as shown and
described.
2. A petroleum incandescent lamp burner having a circular wick tube surrounded
by a perforated case provided with an internal flange, said perforated case acting
as a guide for a flat or slightly curved wire or perforated sheet metal screen rest-
ing on top of the wick, means for raising the wick, a plate having holes around
its exterior arranged above the perforated case, and baffle plates arranged in the
chimney at the upper part of which is situated a conical wire screen partly within
the mantle, substantially as herein shown and described.
Dated this 20th day of Nov 1900
HARRIS & MILLS,
23, Southampton Buildings, London, W.C., Agents.