Improvements in Gas Lighting and in Apparatus connected therewith.
Year: 1897

page_text: Date of Application, 11th June, 1897
Complete Specification Left, 11th Mar., 1898-Accepted, 11th June, 1898
PROVISIONAL SPECIFICATION.
Improvements in Gas Lighting and in Apparatus connected therewith.
I, JOHN SANDERS MUIR, of No. 12, Lilyville Road, Fulham, Middlesex, Actuary,
do hereby declare the nature of this invention to be as follows:-
My invention consists of a new method of treating gas to be used for lighting
purposes and of the atmospheric air required for supporting and assisting in the
formation of the flame, and of the apparatus connected therewith.
My plan is to enclose the gas as it leaves the gas-pipe in a mantle made of
suitable material capable of enduring or standing a great heat, sealed at its upper
and lower extremities and perforated around its side near its lower extremity
to allow the gas to issue forth from the interior of the mantle. I surround
the lower end of the said mantle by another mantle made of suitable material and
of sufficient height to cover the said perforations, closed at the bottom but open
at the top so as to allow the gas to issue forth to form the flame. The whole is
then enclosed in a glass shade sealed at the base but open at the top and terminat-
ing with a serrated edge, on this I suspend a glass chimney having a flange round
its extremity for the purpose of effecting the said suspension, and of sufficient
length to cover the opening above mentioned for the escape of the gas at the top
of the said outer mantle but not sufficiently long to reach the tray on which the
above mentioned shade rests. The chimney is of course suspended within the
shade.
The result of my invention is that both the gas and the atmospheric air con-
sumed in the formation of the flame become superheated when combining to form
the flame.
COMPLETE SPECIFICATION.
Improvements in Gas Lighting and in Apparatus connected therewith.
I, JOHN SANDERS MUIR, of No. 12, Lilyville Road, Fulham, Middlesex, Actuary,
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: —
My invention consists of a new method of treating gas to be used for lighting
purposes and of the atmospheric air required for supporting and assisting in the
formation of the flame, and of the apparatus connected therewith.
My plan is to enclose the gas as it leaves the gas nipple in a mantle made of
Price Rd 1

page_text: suitable material capable of enduring or standing a great heat, sealed at its upper
and lower extremities and perforated around its side near its lower extremity
to allow the gas to issue forth from the interior of the mantle. I surround
the lower end of the said mantle by another mantle or burner proper made of suitable
material and of sufficient height to cover the said perforation, closed at the bottom
but open at the top so as to allow the gas to issue forth to form the flame, The whole
is then enclosed in a glass shade sealed at the base but open at the top and termin-
ating with a serrated edge, on this I suspend a glass chimney having a flange
round it for the purpose of effecting the said suspension, and of sufficient
length to cover the opening above mentioned for the escape of the gas at the top
of the said outer mantle but not sufficiently long to reach the tray on which the
above mentioned shade rests. The chimney is of course suspended within the
shade.
The result of my invention is that the gas to be consumed becomes superheated
to form the flame.
My invention will be clearly understood by reference to the annexed drawings
in which I show at Figure 1 a sectional elevation of a gas burner and its
appendages as before described, and at Figure 2 a similar elevation of a slightly
modified arrangement but in which the chief feature of my invention is reserved.
A supply or service pipe. B an ordinary Bray nipple, say, a No 2 Bray, sur-
mounted by a mantle or inverted cap C, the lower end of which is screwed for
convenience into an inner collar D of a ring shaped burner E, the walls of which
are preferably close to each other to thin down the flame as much as is consistent
with increase of luminosity. F is a glass shade or globe surrounding the
burner and resting upon a plain imperforated base or gallery G and having a
serrated top edge H from which the chimney I is suspended by its flange J in
order that the bottom edge K of the chimney I shall be above the gallery or
base G to compel the air drawn in through the serrations H to feed the flame
to be rarefied in passing down between the globe and chimney to the space L
under the chimney and then distribute itself against the outside of the flame to
support combustion.
The base of the ring burner E may be perforated for a portion of the air to
pass to the inside of the flame but this is not essential on account of the thinness of
the flame which the rarefied air can penetrate.
According to the modification shown at Figure 2, the mantle C is shown enlarged
or made bulbous at its upper part to be in closer contact with the flame, said
bulbous part serving as a gas reserve for feeding the burner E with gas of a much
higher temperature from its retention in the bulb than is possible by the plain
mantle shown at Figure 1.
The top of the bulbous mantle is also much higher than in that of the plain
mantle and enables me to employ a concentrator M of the gas as it issues from
the nipple B in order that it may strike against the hot dome of the mantle C
and be the better deflected to spread downwardly to the gas passage of the ring
burner E.
Instead of the chimney being suspended as before, it may sit upon a perforated
base or gallery N, so that the air from the shade or globe may pass under it, the
base or gallery G for an ordinary shade or globe being separate and plain. The
air passes down between shade F and chimney I in a rarefied condition in the same
manner as described with reference to Figure 1.
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 herein before recited improvements in gas lighting apparatus whereby
a thin flame highly heated by conduction is supplied with rarefied air, the con-
struction being that shown at Figure 1 of the annexed drawings.

page_text: 2. The herein before recited modification or modifications of parts of gas lighting
apparatus as described with reference to Figure 2 of the annexed drawings.
3. The employment of a Bray or equivalent nipple (giving small quantity of
gas) within a close ended or dome shaped mantle within range of flame for
imparting heat thereto and transferring such heat to the gas in transit to the
burner proper, whereby the flame is rendered of great luminosity by the assistance
of rarefied air passing downwards before reaching the flame, as described.
4. The employment with an enclosed Bray or like nipple of a concentrator
and a bulbous headed mantle for holding gas in reserve, as and for the purpose
or purposes explained.
The 11th day of March 1800