Improvements in Lamps for Burning Mineral and other Oils.
Year: 1886

page_text: Date of Application, 8th July, 1886
Complete Left, 22nd Mar., 1887.
Complete Accepted, 22nd Apr., 1887
PROVISIONAL SPECIFICATION.
Improvements in Lamps for Burning Mineral and other Oils.
I DANIEL COLEMAN DEFRIES of the firm of J. Defries & Sons of No. 147
Houndsditch London in the County of Middlesex Manufacturer do hereby declare the
nature of this invention to be as follows:-
My Invention relates to improvements in lamps for burning mineral and other oils,
whereby I give great capillary power to the lamp, the oil rising freely up the wick
and insuring a continuously brilliant and steady light.
It consists in the use of a wick tube or tubes formed with corrugations or curves so
as to be in actual contact with the wick only at certain points of its circumference,
leaving between such points conduits by which columns of oil rise in contact with the
wick either to the top of the tube or tubes, or within a certain distance thereof, being
there maintained at a higher level than the oil in the reservoir.
The use of a wick tube or tubes so corrugated prevents the friction of the oil against
the metal tube or tubes that otherwise occurs and so enables a lamp to burn heavy
oils without diminution of the flame.
On the accompanying Sheet of Drawings
Figure 1 represents a sectional elevation through a lamp having a corrugated inner
wick tube.
Figure 2 a similar view but representing a lamp having both inner and outer wick
tubes corrugated.
Figure 3 being a section through 1. 1.
Figure 4 a section through 2. 2.
Figure 5 a section through 3. 3.
A indicates the reservoir or container for the oil.
B the burner.
C the inner tube.
D the outer tube.
E the corrugations or curves of the wick tubes.
..
011

page_text: By corrugating the tubes CD only to the height of the top of the reservoir A, as
shown Figs. 1 and 2, any vapour generating will be prevented from rising to the
flame, but I may corrugate them up to the top. I may also in lieu of an outer plain
and an inner corrugated tube as at Figs. 1 and 3, use an inner plain and an outer
corrugated tube; when both tubes are corrugated, the points of contact with the wick
need not necessarily be opposite each other as shown Figure 4, but may be alternating
or in any suitable order and I may make the corrugations or curves of whatever
section I may in practice find most desirable.
My invention is applicable to all kinds of oil lamps with circular wick and whether
with or without central air current.

page_text: alternating as at Figure 6, or in any suitable order, and I may make the corrugations
or curves of whatever section I may in practice find most desirable.
My Invention is applicable to all kinds of oil Lamps with circular wick, and
whether with or without central air current.
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. In a lamp for burning mineral and other oils, the Concentric wick tubes C D
having the corrugations E forming oil conduits, whether such corrugations terminate
short of the top of the tube, or extend throughout its length, substantially as described.
2. The combination of a corrugated wick tube with a non corrugated tube,
substantially as described.
3. The combination of two corrugated wick tubes, the points of contact e not being
opposite to each other as at Figure 4, but alternating as at Figure 6, or in any suitable
order.