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

page_text: Date of Application, 26th Mar., 1886.
Complete Left, 24th Dec., 1886.
Complete Accepted, 25th Jan., 1887.
PROVISIONAL SPECIFICATION.
Improvements in Lamps or Lanterns for Burning Mineral
or other Oils.
I DANIEL COLEMAN DEFRIES, of the firm of I. Defries and Sons of 147 Hounds-
ditch, in the City of London, Manufacturer, do hereby declare the nature of this
invention to be as follows:-
This invention relates to certain improvements which I propose to apply to every
kind of Lamp or Lantern, whether street lamp, chandelier, railway carriage roof-
lamp, bracket lamp or other, in which the oil reservoir is placed above the level of the
burner, or of any orifice in the burner, with the object of supplying oil to the burner
automatically as required from a reservoir of any size placed at any desired distance
from the burner.
For the better comprehension of my invention I will refer to the accompanying
sheet of Drawing upon which :-
Figure 1 represents an elevation of a Lantern having my improvements.
Figure 2, view of feel valve detached, the plug and cover being closed, and
Figure 3 position of same when open.
A indicates the oil reservoir.
B the burner.
C oil level.
1) oil supply pipe.
E low level of oil.
Fair vent.
Gair tube leading up to reservoir.
H oil feed valve.
I plug.
K lever.
Lcover plate
M air vent.
The pipe D being closed by its tap, the reservoir A is filled with oil through the
feed valve H, and on this being closed, the pipe D is opened and the oil flowing down
to the level C, the air vent F is closed and the Lamp is ready for burning.
Pics &1
M air vent.
The pipe D being closed by its tap, the reservoir A is filled with oil through the
ed valve H, and on this being closed, the pipe D is opened and the oil flowing down
the level C, the air vent F is closed and the Lamp is ready for burning.
Price & l

page_text: When by the absorption of oil to feed the flame the level lowers from the line C to
the line E, the air vent F, leading to the reservoir A, is opened and the current of air,
passing up
the tube G, pressing upon the oil in the reservoir causes it to flow down
the pipe D, until the level C is attained and the air vent F again closed; thus, the oil
is always reestablished at the line C by the admission of air to the reservoir directly
the consumption tends to lower the level and therefore there will be no diminution of
light so long as there is oil in the reservoir, which may be of any size, ensuring a light
for days, weeks or months, as may be required, without refilling and without risk of
the oil overflowing.
When it is desired to refill the reservoir through my feed valve H, the lamp-trimmer
raises the crank K attached to the plug I, by which means he can introduce oil into
the reservoir, the vent M opening and allowing air to pass out at the same time.
Attached to this feeder is a cover plate L which works automatically with crank K
and plug I to prevent admission of dust or foreign bodies to the reservoir.
Although I prefer to use my improved feed valve H, I may use any other device
which I may find suitable for my purpose.
It will be seen that the reservoir A is here outside the Lantern so that the oil will
not become heated or volatilized by the heat within it; and my system of automatic
oil feeding will permit the reservoir to be kept cool in nearly all kinds of Lamps
having the reservoir above the burnor, a desideratum not hitherto attained.

page_text: Improvements in Lamps or Lanterns for Burning Mineral
or other Oils.
I, DANIEL COLEMAN DEFRIES of the firm of I. Defries and Sons of 147 Hounds-
ditch, in the City of London,. Manufacturer, 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 certain improvements which I propose to apply to every
kind of Lamp or Lantern, whether Street Lamp, Chandelier, Railway Carriage Roof
Lamp, bracket Lamp or other, in which the oil reservoir is placed above the level of
the burner, or of any orifice in the burner, with the object of supplying oil to the
burner automatically as required from a reservoir placed above the Burner.
For the better comprehension of my invention I will refer to the accompanying sheet
of Drawing upon which
Figure 1 represents an elevation of a Lantern having my improvements.
Figure 2. view of feed valve detached, the plug and cover being closed and
Figure 3 position of same when open.
A indicates the oil reservoir. B The burner. C Oil level. D Oil supply pipe.
E low level of oil. F air vent. Gair tube leading up to reservoir. H Oil feed
valve. I plug. K Lever. L Coverplate. M air vent.
The pipe D being closed by its tap, oil is introduced into the reservoir A through
the feed valve H, and on this being closed, the pipe D is opened and the oil flows
down to the level C until the air vent F is closed; the Lamp being then ready
for burning.
When by the absorption of oil to feed the flame the level lowers from the line C to
the line E, the air vent F, leading to the reservoir A, is opened and the current of air,
passing up the tube G, pressing upon the oil in the reservoir causes it to flow down
the pipe D, until the level C attained, the air vent F again closed, and the
equilibrium of pressure reestablished; thus, the oil is always reestablished at the line C
by the admission of air to the reservoir directly the consumption tends to lower the
level and therefore there will be no diminution of light so long as there is oil
in the reservoir, ensuring a light for days, weeks or months, as may be required,
without refilling, and without risk of the oil overflowing.
When it is desired to refill the reservoir through my feed valve H, the lamp-
trimmer raises the crank K attached to the plug I, by which means he can introduce
oil into the reservoir, the vent M opening and allowing air to pass out at the same
time. Attached to this feeder is a cover plate L which works automatically with
crank K and plug I to prevent admission of dust or foreign bodies to the reservoir.
Although I prefer to use my improved feed valve H, I may use any other device
which I may find suitable for my purpose.
It will be seen that the reservoir A is here outside the Lantern so that the oil will
not become heated or volatilized by the heat within it; and my system of automatic

page_text: oil feeding will permit the reservoir to be kept cool in nearly all kinds of lamps
having the reservoir above the burner, a desideratum not hitherto attained.
I may find it desirable to provide the reservoir with a tube or other means of
regulating the amount of air to be left in the reservoir after filling.
..
Having now particularly described and ascertained the nature of my said invention -5
and in what manner the same is to be performed I declare that what I claim is :-
1. In an oil Lamp or Lantern,t he combination with the burner and the reservoir of an.
air tube having a vent automatically opening and admitting air to the reservoir so as
to give a regulated supply of oil to the burner substantially as described.
2. The arrangement of apparatus for automatically supplying oil to the burner of 10
the Lamp as described and shown Fig. 1 of the Drawing.