Year: 1887

page_text: Date of Application, 2nd July, 1887
Complete Left, 21st Feb., 1888
Complete Accepted, 27th Apr., 1888
I WILLIAM HENLEY of No. 100 Brocklehurst Street New Cross Lamp Maker
do hereby declare the nature of this invention to be as follows:-
I claim as my invention a contrivence to give a continual supply of oil to prolong
the light in circular burners. Which will consist of a tube fixed to the bottom of
burner as near winder as nessesary. This tube is fitted with a peice of circular lamp
cotton to be made any suitable length as required. It as to be fitted on the outside
of the wick tube so as to give a supply of oil to burner when the wick is out of
reach of oil. The wick tube must be perforated under the burner so as to allow the
feeder cotton to come in contact with wick, thus keeping up a continual supply of oil
to burner.

page_text: COMPLETE SPECIFICATION.
Improvements in Circular Wick Petroleum Safety Lamps.
I, WILLIAM HENLEY of No. 100 Brocklehurst Street, New Cross, Lamp Maker
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:-
-
Hitherto in safety Petroleum lamps as ordinarily constructed, the wick moves
between an air tube and an outer wick tube which renders the lamp safe in the event
of an upset, but as the wick is consumed it becomes gradually shorter, so that in the
ordinary course during the time the lamp is alight the quantity of oil therein is
insufficient to meet and come in contact with the lower extremity of the wick, and
the lamp becomes gradually extinguished, a disadvantage which it is the special object
of my invention to overcome.
at
In order that my invention may be the better understood I have appended the
accompanying three sheets of drawings in which, Figure 1 is a sectional elevation of
lamp arranged in accordance with my invention, Figure 2 is a sectional elevation
of the tubes, wick and feeder, and Figure 3 is a sectional plan of same drawn on
line A B Figure 2. Figures 4. 5. 6 are detached elevational views of the several
tubes employed in my improved safety lamp. Figure 7 is an elevational and Figure S
a sectional elevational view of a spreader for expanding the flame, Figure 9 being a
detached view of same.
In carrying out my invention I provide an air tube B secured in any suitable
manner to the base or bottom of the reservoir A of a lamp, and extending upward to
and level with the burner tube C. Said burner tube C to which is attached an
enclosed chamber D containing the regulating mechanism, extends to nearly the
bottom of the reservoir A, and is perforated with a number of flattened orifices a
shown detached at Figure 2 a for the purpose hereinafter described.
To the burner tube C aforesaid is screwed above the perforations a, a solid safety
tube E also reaching to nearly the bottom of the reservoir A. Between the air tube B
and the burner tube C is inserted so as to reach to the bottom of the reservoir A the
burner wick b, and between the burner tube C and outer solid safety tube E, is a
feeder wick c extending from the top of the perforations a of the burner tube C to
the bottom of the reservoir A.
The action of the apparatus described above is as follows:-Assuming the burner
wick to be, say, half consumed, and the reservoir A only half full, that is to say that
the surface of the oil just escapes contact with the lower end of the wick, b, the oil
will in this case rise by capillary action up the feeder wick c aforesaid passing to the
burner wick by way of the perforations a in the tube C. This feeding of the
burner wick by capillary action continues so long as a drop of oil remains in
the reservoir A, thus ensuring to the lamp a constant and perfectly regular light.
Should it be desired to spread the flame into a flower like form, I employ two discs
of metal joined together in any suitable manner, the upper of which Figure 8 is

page_text: slightly concave and the lower disc g convex, so that the air passing up the tube F
forming part of a spreading device strikes against the concave face of the upper disc
and escapes through the passage h between the two discs in a slightly downward
direction, so as to strike the interior face of the flame just above the blue or non
actinic rays. Or, instead of the two discs above described, I may use a single disc
recessed or hollowed out to receive the air tube, and having radial perforations
formed on the outer edge thereof at an angle relatively to the horizontal line, of say
from 10 to 15 degrees, to allow of the air passing therethrough, striking the flame at
its point of greatest heat, thus ensuring more perfect combustion, and consequently
greater brilliancy and higher illuminating power.
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
1 claim is:
First The improvements in circular wick Petroleum safety lamps substantially
as herein described and shown in the accompanyings drawings.
Second In Petroleum lamps the adaptation thereto of a perforated burner tube
to allow of the feeding of the oil to the wick, substantially as herein set forth and
shown.
Third The employment in Petroleum lamps of a permanent feeder for feeding
oil to the wick substantially as herein set forth.
Fourth The adaptation to Petroleum lamps as herein described of the outer
safety tube E substantially as herein set forth and shown.
Dated this Thirty first day of January 1888.
.
JAMES
STEVENSON,
Gray's Inn Chambers,
20, High Holborn, London, W.C.,
Agent for Applicant.