Improvements in Oil Lamps.
Year: 1891

page_text: Date of Application, 9th Nov., 1891
Complete Specification Left, 20th July, 1892-Accepted, 20th Aug, 1892
PROVISIONAL SPECIFICATION.
Improvements in Oil Lamps.
We, THE MIDLAND LIGHTING COMPANY LIMITED, of Belge Lamp Works,
Stanhope Street, Birmingham in the County of Warwick, Lamp Manufacturers
and HOWARD WALKER, of" Inglesant," Cotton Lane, Moseley, in the County of
Worcester, Works Manager and Secretary, do hereby declare the nature of this
invention to be as follows:-
The said invention has reference to oil lamps of the kind called central draught
lamps in which circular wicks are used; and the said invention consists of the
arrangements or combinations of parts hereinafter described of the said lamps,
whereby the body of the burner is kept very cool and ready access to the interior
of the burner obtained for cleaning it and for other purposes.
Central draught lamps made according to this invention have also the minor
advantages hereinafter pointed out.
The fixed central draught tube by which air is supplied to the interior of the
circular wick is situated in the axis of and passes through the oil container as usual
and is open to the air at the bottom of the said oil container. The burner carries
at its bottom a depending tube which is situated around a portion of the fixed
central draught tube. In this depending tube the wick carrier tube is situated
and works the circular wick being placed within the said carrier tube. The wick
in the carrier tube is adjusted to the required height in the burner by means of the
wick adjusting pinion engaging with rack teeth, consisting of parallel slots or
perforations, made at one side of the said carrier tube.
The wick carrier tube is made to fit so closely in the central depending tube on
the burner that on the overturning of the lamp no oil from the oil container can
escape between the said tubes; and as the circular wick within the carrier tube fits
or is packed so closely upon the fixed central draught tube the oil in the overturned
lamp can only slowly escape from the oil container through the said wick. By this
arrangement the lamp is immediately extinguished on being upset and accidents
prevented if volatile oils be used.
In order to keep the burner thoroughly cool as well as to supply air to the outside
of the wick we make in the lower part of the body of the burner, just above where
it is screwed on the oil container, a series of, by preference, parallel vertical
perforations. By means of the said perforations a large amount of air is supplied
to the interior of the burner for the purposes described.
We make the glass holder and cone of the burner in one piece and secure the
combined parts to the body of the burner by screwing. By this means ready access
can be obtained to the interior of the burner for cleaning it and for lighting or
extinguishing the lamp.
Dated the 9th day of November 1891.
W. T. WHITEMAN,
Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Oil Lamps.
We THE MIDLAND LIGHTING COMPANY LIMITED, of Belge Lamp Works,
Stanhope Street, Birmingham, in the County of Warwick, Lamp Manufacturers,
and HOWARD WALKER, of "Inglesant," Cotton Lane Moseley, in the County of
[Price 8d.]

page_text: .
Worcester, Works Manager and Secretary, do hereby declare the nature of the
said invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :-
The said invention has reference to oil lamps of the kind called central draught
lamps in which circular wicks are used; and the said invention consists of the
arrangements or combinations of parts hereinafter described of the said lamps,
whereby the body of the burner is kept very cool and ready access to the interior
of the burner obtained for cleaning it and for other purposes.
Central draught lamps made according to this invention have also the minor
advantages bereinafter pointed out.
The fixed central draught tube by which air is supplied to the interior of the
circular wick is situated in the axis of and passes through the oil container as usual
and is open to the air at the bottom of the said oil container. The burner carries
a tube which is situated around a portion of the fixed central draught tube and
slightly depends from the bottom of the burner. In this depending tube the wick
carrier tube is situated and works the circular wick being placed within the said
carrier tube. The wick in the carrier tube is adjusted to the required height in
the burner by means of the wick adjusting pinion engaging with rack teeth
consisting of parallel slots or perforations, made at one side of the said
carrier tube.
The wick carrier tube is made to fit so closely in the central depending tube
on the burner that on the overturning of the lamp no oil from the oil container
can escape between the said tubes; and as the circular wick within the carrier tube
fits or is packed so closely upon the fixed central draught tube the oil in the over-
turned lamp can only slowly escape from the oil container through the said wick.
By this arrangement the lamp is immediately extinguished on being upset and
accidents prevented if volatile oils be used.
In order to keep the burner thoroughly cool as well as to supply air to the
outside of the wick, we make in the lower part of the body of the burner just above
where it is screwed on the oil container, a series of by preference parallel vertical
perforations. By means of the said perforations a large amount of air is supplied
to the interior of the burner for the purposes described.
We secure the glass holder and cone of the burner to the body of the burner by
screwing. By this means ready access can be obtained to the interior of the burner
for cleaning it and for lighting or extinguishing the lamp.
Figure of the accompanying drawing represents in elevation and Figure 2,
partly in vertical section, a central draught lamp containing the improvements
constituting this invention;
Figure 3 represents in section, the body of the burner and glass holder and cone,
detached from the oil container and
Figure 4 represents in plan the upper side of the burner with the cone and glass
holder removed;
Figure 5 represents in vertical section Figure 6 in plan of upper side and Figure 7
in plan of underside the body of the burner drawn to a larger scale than Figures 1, 2,
3 and 4;
Figure 8 represents in side elevation and horizontal section, the wick carrier
tube detached from the burner and
Figure 9 represents in section, the combined glass holder and cone drawn to a
large scale.
The same letters of reference indicate the same parts in the several figures of
the drawing.
a is the oil container and b is the fixed central draught tube by which air is
supplied to the interior of the circular wick c; d is the burner of the lamp having
a tube e which is situated around a portion of the fixed central draught tube b. In
the tube e the wick carrier tube f works, the central wick c being placed within the
said carrier tube and prevented from slipping in the said carrier tube by the inwardly

page_text: bent nibs or points g penetrating the material of the wick. The wick e in the
carrier tube is adjusted to the required height by the pinion / engaging with the
rack teeth in the said carrier tube f. It will be seen by an examination of Figure 8
that the rack teeth i in which the pinion engages consist of parallel slots or
perforations made at one side of the tube. By rotating the handle h of the
pinion it is made to raise or lower the wick carrier tube f and with it the wick c
within it.
•
h
The burner d is kept thoroughly cool and a large amount of air supplied to the
interior of the burner and outside of the wick by means of parallel perforations
in the lower part of the body of the buruer just above where it is screwed into
the mouth of the oil container as seen in Figures 1 and 2, where the perforations
are marked ².
It will be seen by an examination of Figure 2 that the wick carrier tube is
made to fit so closely in the central tube e of the burner that on the overturning of
the lamp, no oil or practically no oil can escape between the two tubes e and fand
as the circular wick c within the carrier wick tube fits or is packed so closely
upon the fixed central draught tube b, the oil in the overturned lamp can only
slowly escape from the oil container through the said wick; k is the cone and is
the glass holder of the burner. The lower tubular part of the cone k, of the com-
bined cone and glass holder, is screwed at m and the tubular top of the burner has
a corresponding concave serew thread a made in it for the screw at m to engage
with. By this arrangement of parts the combined glass holder and cone is secured
to the burner by screwing, and by unscrewing the cone from the burner ready access
to the latter for cleaning it and for lighting and extinguishing the lamp is obtained.
The burner is screwed into the mouth of the oil container at p.
In the cap of the burner d we make two holes . r and in the underside of the
body of the burner we make a larger holes (see Figures 5, 6 and 7). It will be
seen by an examination of Figures 6 and 7 that the smaller holes
rare situated
at opposite points in the cap of the burner, but the larger hole s is not situated
opposite either of the said holes 7, r, the said lower hole s being situated midway
between the two upper holes y, and at a lower level. By means of the said holes any
explosive gas which may be generated in the oil container is permitted to escape,
the gas first passing through the larger hole s into the interior of the burner and
thence escapes by the smaller holes q, in the cap of the burner. In case the
lamp is upset there is no direct passage of the oil from the container to the burner
in consequence of the position of the holes y, r, and hence the lamp is rendered
perfectly safe from explosion should the lamp be upset.
Having now particularly described and ascertained the nature of the said
invention and the manner in which the same is to be performed we wish it to
be understood that we claim as our invention of improvements in central draught
oil lamps;-
-
First The combination with the central draught tube and axial burner tube of
the burner of a wick carrier tube within which the circular wick is placed, the said
wick carrier tube being provided with rack teeth for the wick adjusting pinion
to gear with substantially as hereinbefore described and illustrated in the
accompanying drawing.
Secondly; Providing the burners of the said lamps with parallel vertical
perforations for supplying air to the interior of the burner for keeping it cool and
to the outside of the wick substantially as hereinbefore described and illustrated in
the accompanying drawing.
;-
Thirdly Connecting the combined glass holder and cone of the lamp burner
to the body of the burner by screwing substantially as hereinbefore described and
illustrated in the accompanying drawing.
Fourthly-Making in the body of the burner the holes 7, r, s for permitting of
the ready escape of gas from the oil container, and for preventing the oil from the

page_text: oil container, on the upsetting of the lamp, passing directly to the burner substan-
tially as herein before described and illustrated in the accompanying drawing.
Dated the 19th day of July 1892.
THE MIDLAND LIGHTING COMPANY, LIMITED,
By Rowland Francis Heath,
Managing Director.