Improvements in Petroleum Lamps.
Year: 1889

page_text: Date of Application, 2nd Dec., 1889-Accepted, 4th Jan., 1890
COMPLETE SPECIFICATION.
Improvements in Petroleum Lamps.
1 JOSEPH RISTELHUEBER, Lamp Manufacturer, of 95 Boulevard Beaumarchais,
Paris in the Republic of France, 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 :-
This invention relates to a novel construction of petroleum lamp, the burner of
which is formed by a double dome or air chamber, for concentrating and regulating
the supply of air for supporting combustion, and its mixture with the gas at the
lighting point of this mixture.
This novel combination of lamp burner gives a brighter light, and ensures the
perfect combustion of the petroleum vapours which are burnt.
The combustion being perfect, the odours which are generally given off by
petroleum lamps, and which arise from an imperfect combustion of the vapour
disappear and my lamp is consequently inodorus.
The arrangement I have adopted to produce these results is illustrated in the
accompanying drawing.
Fig. 1 shows an elevation, partly in section, of a table lamp.
Fig. 2 is a vertical section of the inner part of the burner.
Fig. 3 is a vertical section of the lamp glass.
My lamp is composed of a petroleum reservoir A, on which is screwed the air
chamber B. An internal tube C, through which passes the wick D, is soldered to
the base a of the chamber B.
The wick D is raised and lowered in the same way as in lamps of ordinary con-
struction by the wheel F. The glass-gallery H, screwed on the chamber B, is formed
with a dome shape piece b, through which passes the burner,
An annular opening c is formed around this burner, so as to regulate the height
at which the vapour will burn above the burner of the lamp, by a current of air passing
up the outer surface of the burner.
A circular perforated plate I rests on a circular projection e formed for this
purpose on the upper part of the body A of the lamp.
A second wick K, of a larger diameter than the wick D, is attached to a
cylinder, which is soldered to the plate I.
Having now described the principal parts of my new lamp, I will now follow the
course of the two elements, the combination of which, preparatory to their combustion,
constitutes the subject of this invention.
Having removed the upper part B, I pour the petroleum onto the plate I, and the
liquid runs into the reservoir by the central opening and by the perforations n made
in the above mentioned plate I. I then screw on the air chamber B, and the lamp
is ready for lighting. The fixed wick K, being always in contact with the wick D, à
communication is established with the exterior part for the passage of the petroleum
vapour in a most regular and constant manner, whatever the level of the liquid in
the reservoir may be. In order to light the wick D, it should be raised by the
wheel F to the upper part m of the burner. A light having been applied, the wick
should be gradually and gently lowered, thus establishing a current of air, the direction
of which is indicated by the arrows.
The air for mixing with the vapour for combustion enters the chamber B by small
orifices, formed all round it, and meets the vapour at the height of the upper
portions of the tube C. The mixture is effected in the part of the burner, and
the flame extends to the exit towards m.
The current of air passing in the direction of the arrows on the outer surface of
the tube B, has the effect of concentrating the mixture for burning, and thus ensures

page_text: its complete combustion. The gallery H being screwed to the part B, the height of
the opening c, and consequently the height of burning point m, may be varied.
This novel form of burner is applicable to all kinds of lamps, of any shape or
size, whether they be fixed lamps, piano lamps, or table lamps.
A globe or glass with a shade may equally well be applied to these lamps.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what I
claim is
1. The arrangement of double wicks, one fixed and the other movable, for
ensuring the supply of petroleum to the burner, whatever its level in the
reservoir.
2. The construction of burner for petroleum lamps with double air chamber, which
utilizes for the combustion a draught of cold air, and regulates the height of the
burning point in the manner described and illustrated in the drawing.
3. A petroleum lamp constructed, arranged, and operating as described and shewn
in the accompanying drawing.
Dated this 2nd day of December 1889.
NEWTON & SON,
Agents for the Applicant.