Improvements in Lamps.
Year: 1891

page_text: Date of Application, 22nd May, 1891
Complete Specification Left, 22nd Feb., 1892-Accepted, 2nd Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in Lamps.
We, WOLF DEFRIES of No. 4 Cleveland Gardens, Hyde Park, Gentleman,
and VICTOR ISIDORE FEENT of 7 Queen Victoria Street London, Consulting
Engineer, both in the County of Middlesex do hereby declare the nature of this
invention to be as follows :-
In lamps of ordinary construction the wick is wholly or partially fed with oil
directly in contact with it, whereby the amount fed to the flame is liable to vary
either violently on oscillation or upsetting of the lamp, or gradually on the
reduction of the oil-level in the reservoir.
The object of our invention is to provide without complicated construction and
applicable to existing lamps a means of removing these defects and it consists in
surrounding that part of the wick which extends into the reservoir by a thin
perforated case extending from the top to the bottom of the reservoir or wick box
and covered through the whole of its length with an auxiliary wick or other suit-
able porous material. The case may be of metal or other suitable material, and
inny be either a perforated continuation of the burner tube or an independent
perforated tube fixed in the reservoir.
Its diameter or section is preferably such as to allow the wick to slide easily in
contact with its inner surface, the porous material being in that case placed outside
the case; but we may where desirable place the porous material inside the tube,
the wick slipping then into contact with the porous material; or we may cover the
case with porous material both inside and outside.
A convenient method of isolating the oil at the lower part of the case is to
extend the porous material round the bottom edge of the case, such extension
being then pressed against the bottom of the reservoir by the case when screwed
down or otherwise fixed in position.
When oil is poured into the reservoir it passes through the side or sides of the
porous material and either comes in contact with the lamp wick or else is attracted
thereto by capillary attraction across the perforations of the thin tube. The oil
not being able to reach the lamp wick except through the porous material, no
violent rush of oil to the flame can be caused by oscillation; and the coolness and
added thickness of the porous material assists the capillary action of the lamp wick
to a large extent, and reduces the fall in light which otherwise accompanies a fall
of oil level.
A further advantage is that the flame continues to be fed after the lamp wick
has been raised above the oil level.
Dated this Twenty-second day of May 1891.

page_text: Improvements in 'Lamps.
We, WOLF DEFRIES of "No. 4 Cleveland Gardens, Hyde Park, Gentleman,.
and VICTOR ISIDORE FEENY of 7 Queen Victoria Street London, Consulting
Engineer, both in the County of Middlesex, do hereby declare the nature of this
invention and in what manner the samne is 'to be performed, to be particularly
described, and ascertained in, and by the following statement:—
In lamps of ordinary construction the wick is wholly or partially fed with oil-
directly in contact with it, whereby the amount fed to the flame is liable to vary.
either violently on oscillation or upsetting of the lamp or gradually on the reduction
of the oil-level in the reservoir.
The object of our invention is to provide without complicated construction a
means applicable to existing lamps of removing these defects, and it consists in
surrounding that part of the wick which extends into the reservoir by a thin
perforated: case extending from the top to the bottom of the reservoir or wick.box
and covered throughout the whole of its length with an auxiliary wick or other
suitable porous material. The case may be of metal or other suitable material,
and may be either a perforated continuation of the burner tube or an independent
perforated tube fixed in the reservoir, or it may be constructed entirely of
unperforated porous material such as earthen biscuit."
Its diameter or section is preferably such as to allow the wick to slide easily in
contact with its inner surface, the porous material being in that case placed outside
the case but we may when desirable place the porous material inside the case,
the wick sliding then in contact with the porous material; or we may cover the
case with porous material both inside and outside.
A convenient method of isolating the oil at the lower part of the case is to
extend the porous material round the bottom edge of the case, such extension being
then pressed against the bottom of the reservoir by the case when screwed down
or otherwise, fixed in position.
When oil is poured intofthe reservoir it passes through the sides of the porous
material and either comes in contact with the lamp wick or else is attracted
thereto by capillary attraction across the perforations of the thin tube. The
oil not being able to reach the lamp wick except..through the porous material
no violent rush of oil to 'the flame can be caused by oscillation and the coolness
and added thickness of the porous material assists the capillary action of the
wick to a large extent and reduces the fall in light which otherwise accompanies
a fall of oil level.
Further advantages are that the flame continues to be fed.after the lamp wick
has been raised above the oil level, and that the main body of oil in the reservoir
or wick box is isolated from the flame without the usually ensuing decrease in
the supply to the wick.
On the accompanying sheet of drawing:
Figure 1. is a vertical section through a lamp illustrating the application of our
invention thereto.
Figure 2. is a transverse section through the wick-case at line 1-2. Figure 1.
Figure 3. is a transverse section through same at line 3-4. Figure 1.
Figure 4. shews a modification of our invention the wick-case being constructed
of wire gauze.
A being the reservoir.;
B the wick;
C the perforated wick-case:
D the auxiliary wick';
E the bottom of the reservoir

page_text: F the ring for securing lower end of auxiliary wick or porous material to.
wick-case.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that.
what we claim is :-
1. In lamps for burning mineral oils the use of insulating capillary wick-cases.
substantially as hereinbefore described.
2. In lamps for burning mineral oils a perforated or porous wick-case (C) within
the reservoir (A) in combination with an auxiliary wick (D) or its equivalent,
substantially as described for the purposes specified.
040
▬
VA
For the Applicants,
W. E. GEDGE,
Agent.