Year: 1887

page_text: Date of Application, 17th Feb., 1887
Complete Left, 16th Nov., 1887
Complete Accepted, 16th Dec., 1887
1, JOSEPH BEVERLEY FENBY, of Sutton Coldfield, in the County of Warwick, Civil
Engineer, do hereby declare the nature of this invention to be as follows :-
The object of this invention is to supply oil from a reservoir at the base of the lamp
to the burner at the top of the lamp by the pressure of water, or other liquid of
greater specific gravity than the oil.
The lamp is constructed in the following manner. At the top of the lamp
is an oil cup into which the burner fits. From the oil cup a tube leads to
the oil reservoir. This tube is open at both ends, and serves as an oil tube.
Parallel with this oil tube is a water tube, also open at both ends. The oil
and water tubes both terminate at their lower ends at the upper surface of the oil in
the reservoir. The water tube is shorter than the oil tube, in the ratio needed for the
column of water to balance the column of oil. At the upper end of the water tube is
a water cup for supplying water to the tube; and above this cup is a water reservoir
to feed the cup. This water reservoir is fitted with a valve, and this valve is actuated
by a float in the water cup, so as to keep the water in the cup at a constant level.
The water reservoir may also be constructed on the well known chicken fountain
principle. The lamp acts in following way. The water falls from the water tube
through the oil in the base reservoir, and forces the oil up to the burner. At whatever
rate the burner consumes the oil, the water falls, and keeps up the supply of oil to the
burner.

page_text: I, JOSEPH BEVERLEY FENBY, of Sutton Coldfield, in the County of Warwick, Civil
Engineer, 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 :-
The object of this invention is to supply oil from a reservoir at the base of the lamp
to the burner at the top of the lamp by the pressure of water, or other liquid of greater
specific gravity than the oil.
The lamp is constructed in the following manner. At the top of the lamp is an oil
cup, into which the burner fits. From the oil cup a tube leads to the oil reservoir.
This tube is open at both ends, and serves as an oil tube.
Parallel with this oil tube is a water tube, also open at both ends.
The oil and water tubes both terminate at their lower ends at the upper surface of
the oil in the reservoir. The water tube is shorter than the oil tube, in the ratio
needed for the column of water to balance the column of oil.
At the upper end of the water tube is a water cup for supplying water to the tube;
and above this cup is a water reservoir to feed the cup. This water reservoir is fitted
with a valve, and this valve is actuated by a float in the water cup, so as to keep the
water in the cup at a constant level. The water reservoir may also be constructed on
the well known chicken fountain principle.
The accompanying drawing shews a vertical section of a lamp constructed according
to my invention. A is the reservoir for oil at the base of the lamp. B is the oil cup
into which the burner fits. CC is the oil tube. D D is a tube surrounding CC, and
also acting as a water tube. E is the water cup for supplying water to D through
the hole e in the side of D. F is the water reservoir for maintaining the supply of
water in E. g is a valve which is controlled by the float h.
The handle i is for locking the valve g when necessary. j is a pocket or well into
which a small tube k-attached to the water tube-dips.
The action is as follows. The base A is filled with oil to the proper level ; for
which purpose the joint at is unscrewed. This joint is then screwed up, and water
is poured into the reservoir F, the valve g being open. The water finds its way into E
and down the water tube into the well ;, and thence into the oil in the base. The
water pressure thus set up raises the oil up the tube C C into the oil cup, until a level
is reached at which the columns of oil and water just balance each other, when the
float allows the valve g to close, and all action ceases.
When the burner is lit, the oil which is consumed is replaced from below, and a
corresponding volume of water falls from E down the tube D to the base A.
So long
as any oil remains in the base, and water is kept in the reservoir F, the level of oil in
the cup B will not vary, no matter what the consumption of oil from time to time,
when the lamp is lit.
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 :-
The improved hydrocarbon oil lamp described and illustrated.
Dated this 15th day of November 1887