Improvements relating to Oil Lamps.
Year: 1899

page_text: Date of Application, 1st Feb., 1899-Accepted, 4th Mar., 1899
COMPLETE SPECIFICATION.
Improvements relating to Oil Lamps.
I, LUDWIG NIEDERHOFHEIM, of 45, Leerbachstrasse, Frankfurt a/M., in the
Empire of Germany, Merchant, 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:-
This invention relates to petroleum lamps which when overturned is auto-
matically extinguished, and has for its object to provide such a lamp that shall
be effective in extinguishing the flame on being overturned, and in which the
means employed shall be simple and not add substantially to the cost of the
lamp.
The invention consists in the provision of a valve beneath the body of the lamp
so that when it is overturned it may slide into such a position as to close the
central admission valve of the lamp.
The invention is illustrated in the accompanying drawings, in which,
Figure 1 illustrates in sectional elevation a lamp made in accordance with
the invention.
Figure 2 is an under side view of the valve and retaining seat employed for
effecting the closure of the central air admission tube, while
Figure 3 is a partial sectional elevation corresponding to Figure 1, in which the
valve is shown closing the air admission tube.
In carrying the invention into effect in the production of a lamp as illustrated
in the accompanying drawings I provide a lamp of any ordinary usual con-
struction, consisting of a lamp body such as e, and gallery such as c, and a
chimney such as a, air admission tube such as g, burner such as b, a wick
regulator such as d; and beneath the air admission tube 9 I provide a valve
seating m of conical form, in which perforations or slots are provided for the
free upward passage of air from the hollow supporting pillar i to the air admission
tube g. A valve is provided of corresponding conical form to the seating, and
having a flat face. When the lamp stands erect the valve slides in the seat-
ing m as illustrated in Figure 1, while when it is overturned into such position.
as illustrated in Figure 3, the valve slides into the position wherein it closes,
the air admission tube g thereby cutting off the supply of air to the burner b.
and so that as a consequence the flame is extinguished.
Provision is made for the supplementary supply of air by the formation of the
gallery with air admission perforations or slots f, but as the air thus admitted
is insufficient in itself to support the combustion of the flame, the flame is
immediately extinguished when the valve 1 closes the air admission tube 7
as before described.
Provision is made for the admission of air to the hollow supporting pillar i
by such means as a circular series of holes h therein as illustrated.
The burner b is preferably formed with a tapering annulus so that the wick k
may be tightly held, so that on the overturning of the lamp, the escape of oil, is
prevented.

page_text: Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what I
claim is:
-
1. A petroleum lamp in which a central air supply tube is closed on the
lamp being overturned by means of a valve and thereby extinguishing the flame
substantially as described.
2. A safety lamp constructed substantially as hereinbefore described and illus-
trated.