IMPROVEMENTS IN LAMPS
Year: 1884

page_text: "
I, CHARLES DENTON ABEL of No 28 Southampton Buildings Chancery Lane
in the County of Middlesex, Consulting Engineer and Patent Agent do hereby
declare the nature of my invention for IMPROVEMENTS IN LAMPS" a commu-
nication to me from abroad by Moriz Arzberger of Vienna in the Empire
of Austria, Engineer and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement :—
The object of the present invention is to provide a lamp which is capable of
burning for several weeks in any weather and at any temperature without requiring
any attendance and which therefore is particularly suitable for lighthouses which
are situated on spots difficult of access or where the permanent residence of an
attendant would be impossible or inconvenient or too expensive. When such a
lamp is employed capable of burning for a period of about six weeks it will be
sufficient to send an attendant about once a month to refill and clean the lamp.
According to the present invention 1 employ a combination of two petroleum
holders of about equal capacity; one of them being arranged above the other in
such a manner that the oil can flow from the upper reservoir to the lower one and
on its way pass through a burner. I further provide arrangements for preventing
the lamp from being extinguished by wind and for preventing the upper reservoir
getting heated by the sun or by the flame of the lamp.
As fuel for this lamp I preferably employ highly refined light petroleum free of
grease.
In the accompanying drawings Fig. 1 is a view partly in section of a lamp
embodying the present invention and Fig. 2 is a section of a part of the lamp
drawn to a larger scale.
A is the upper and B is the lower oil reservoir. The reservoir A communicates
with the burner D through the passage C. The passage C consists of the tube c²
the filter c the needle valves and the tube c³.
The filter c may consist of several layers of filtering paper and serves to prevent
the valves from being choked by dust or other impurities.

page_text: The burner D consists of the outer tube d and of the inner tube, d². The
petroleum rises through the outer tube d to the mouth of the inner tube d³ which
forms the burner and that portion of the petroleum which is not burnt here flows
down through the inner tube d' into the lower holder B. The overflow passage E
is provided with a syphon or air check el to prevent any draught of air from the
reservoir B to the burner. At e² a glass tube is provided through which the drops
of oil descending from the burner may be seen to enable the supply of oil to the
burner to be regulated as required.
The admission of air to the burner is effected through the tubes F; I preferably
employ at least twelve such tubes although this number may be increased or
diminished according to circumstances. In these tubes several wire gauze
diaphragms are arranged which allow the air to pass freely but which in case of
wind or gale prevent a violent draught.
G is a metal cover. It may be provided with the gutter H to collect the rain
water which may be caused to flow upon the lenses I through the pipes h in order
to wash off any impurities on them.
In order to protect the upper petroleum holder A from the heat of the lamp I
provide a circular shield L with holes 11. By this means a cooling draught around
the bolder A is established, as shewn by the arrows in the drawings.
When the lamp is to be used the reservoir A is filled with petroleum then the
needle valves care adjusted to regulate the feed of oil to the burner D so that
not too much of the oil will flow off. The lamp may then be lighted. When the
lamp is so arranged that it can burn about six weeks, then after about four or five
weeks the upper holder A has to be refilled, and the lower holder B has to be
emptied by means of a tap provided thereon and the burner to be screwed off for
cleaning and to be replaced by a new one.
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 combination of the upper oil holder A with the passage C the burner D
the overflow E and the lower oil holder B for the purpose specified.
2. The combination of the oil holder A with the shield L for establishing a
draught for cooling the said oil holder A.
3. In a lamp for the purpose described the combination of the burner D with a
number of air passages F in which the wire gauze diaphragms ƒ are provided for
the purpose specified.
Dated this 21st day of November 1884.