Year: 1887

page_text: Date of Application, 2nd June, 1887
Complete Left, 28th Mar., 1888
Complete Accepted, 4th May, 1888.
1, JOHN IMRAY, of No. 28 Southampton Buildings, Chancery Lane in the County
of Middlesex, Consulting Engineer and Patent Agent, do hereby declare the nature of
this invention to be as follows:-
In the Specifications No. 2035 of 1882, No. 2757 of 1882, No. 2290 of 1883,
No. 3062 of 1883 and No. 5244 of 1883, are described burners in which a gas flame
supplied with heated air is applied to heat to incandescence a basket or net work hood
of magnesia, thereby giving a brilliant light. The present invention relates to the
construction of burners to act in this way, in such a manner as to render them more
simple, durable and effective. Instead of using magnesia alone to form the
incandescent hood, it is, according to the present invention, mixed to the extent
of 15 or 20 per cent. of its volume with zirconia, whereby it is rendered more durable,
and the light emitted from it is rendered more agreable. The zirconia may be mixed
with the magnesia paste used to form the hood, or the hood, after being made of
magnesia alone, may be moistened with solution of a salt of zirconium such as the
nitrate, which becomes decomposed by the heat, leaving the earthy oxide as a coating
to the magnesia. The hood thus prepared may be placed either above an ascending
gas flame or in an inverted position below a descending flame. In the former case,
the burner is constructed in the following manner :-The gas enters a base of
ceramic material and ascends by two or more ceramic tubes to an annular burner,
and issues by numerous small holes through the inner wall of the annulus in jets
directed radially inwards. On the top of the annular burner is placed a metal ring
from which extends upwards a wire bent to the shape of an inverted V. From the top
of this bent wire the hood, which is of conical form, is suspended by a fine wire
attached to its apex, its base being steadied between ears projecting up from the ring
that rests on the burner. On a gallery supported from the ceramic base by columns
of non-conducting material, is carried a glass chimney enclosing the burner and hood,

page_text: and outside of this is a glass cup or bowl that rests on the ceramic base and extends
upwards nearly as high as the hood. The air for supplying the gas flame descends
through the annular space between the chimney and the bowl, becoming heated on its
way, and passes up under the lower edge of the chimney partly through the central
space of the burner and partly through numerous small holes in a metal screen
outside the burner.
When the hood is used in an inverted position as for a ceiling light, it is suspended
in a net of fine platinum wire from the inverted burner. The burner and hood are
enclosed within a glass globe suspended from a metal chimney above, and through
this chimney pass several tubes having their upper mouths opening through the side
of the chimney and their lower mouths opening into the interior space of the annular
burner; by these tubes air descends to supply the flame; becoming heated on its way
by the products of combustion which ascend from the globe up the chimney and past
the air tubes.

page_text: Improvements in Incandescence Gas Burners.
I, JOHN IMRAY of No. 28 Southampton Buildings, Chancery Lane in the County of
Middlesex, Consulting Engineer and Patent Agent 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 :-
In the Specifications No. 2035 of 1882, No. 2757 of 1882, No. 2290 of 1883,
No. 3062 of 1883, and No. 5244 of 1883 are described burners in which a gas flame
supplied with heated air is applied to heat to incandescence a basket or net work hood
of magnesia, thereby giving a brilliant light. The present invention relates to the
construction of burners to act in this way, in such a manner as to render them more
simple, durable and effective. Instead of using magnesia alone to form the
incandescent hood, it is, according to the present invention mixed to the extent of 15
or 20 per cent. of its volume with zirconia, whereby it is rendered more durable, and
the light emitted from it is rendered more agreeable. The zirconia may be mixed
with the magnesia paste used to form the hood or the hood after being made of
magnesia alone, may be moistened with a solution of a salt of zirconium such as the
nitrate, which becomes decomposed by the heat, leaving the earthy oxide as a coating
to the magnesia. The hood thus prepared may be placed either above an ascending
gas flame or in an inverted position below a descending flame.
In the former case, the burner is constructed as shown by the vertical section
Fig. 1 and the sectional plan on M N Fig. 2; Fig. 3 is an elevation and Fig. 4 a plan
of the hood and its holder.
The gas enters at A a base R of ceramic material and ascends by two or more
ceramic tubes to an annular burner B and issues by numerous small holes through the
inner wall of the annulus in jets directed radially inwards. On the top of the annular
burner B is placed a metal ring M from which extends upwards a wire D bent to the
shape of an inverted V. From the top of this bent wire the hood X which is of
conical form, is suspended by a fine wire attached to its apex, its base being steadied
between cars c projecting up from the ring M. On a gallery G supported from the
ceramic base by columns d, is carried a glass chimney C enclosing the burner and
hood, and outside of this is a glass cup or bowl V that rests on the base R and extends
upwards nearly as high as the hood. The air for supplying the gas flame descends
through the annular space between the chimney C and the bowl V becoming heated
on its way, and passes up under the lower edge of the chimney partly through the
central space of the burner B and partly through numerous small holes o in a metal
screen outside the burner.
The mass R of badly conducting material serves to insulate the metallic parts from
the burner.
When the hood is used in an inverted position, as for a ceiling light, the burner is
arranged as shown by the vertical section Fig. 5. In this case the hood X is
suspended in a net Y of fine platinum wire which is attached by a bayonet catch to

page_text: the ceramic burner T. The gas supplied by the pipe A is led by several tubes t into
the annular space in T whence it issues through numerous small holes directed radially
inwards in the 'burner B. A hood E resting on T forms a chamber N into which open
tubes d conveying air entering at their upper mouths o which open through the
chimney C. A glass globe F suspended from the chimney encloses the burner. The
draught of the chimney causes air to enter and descend the tubes d, becoming heated
in its course, to supply the flame.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The construction of incandescence gas burner described with reference to
Figs. 1 and 2, wherein the air supplied to the burner is heated by passing between
the chimney and an exterior bowl.
2. The construction of holder for the magnesia hood as described with reference to
Figs. 3 and 4.
3. The construction of inverted incandescence burner as described with reference
to Fig. 5.
4. The admixture of zirconia with the magnesia employed for forming the hood
substantially as and for the purpose set forth.
Dated this 20th day of March 1888
ABEL & IMRAY,
Agents for the Applicant.