Improvements in Liquid Fuel Dar
Year: 1897

page_text: Date of Application, 10th May, 1897-Accepted, 12th June, 1897
Improvements in Liquid Fuel Dar
A communication from abroad by THE SOCIÉTÉ ANONYME DU GÉNÉRATEUR
DU TEMPLE, of Paris, in the Republic of France.
I, PHILIP MIDDLETON JUSTICE, of 55 and 56 Chancery Lane, in the County
of Middlesex, Fellow of the Chartered Institute of Patent Agents, 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 :-
This invention relates to certain improvements in the construction of liquid
fuel burners and more particularly to those of the class arranged for firing steam
boilers.
In the accompanying drawing is illustrated some forms of apparatus constructed
according to the invention.
Fig. 1 being a longitudinal section of form of single burner.
Fig. 2 is a section on line M N Fig. 1.
Fig. 3 is a longitudinal section of a form of compound burner and
Fig. 4 is a section on line O. P. Fig. 3.
Referring to Figs. 1 and 2 the nozzle portion A of the diffuser may be of any
suitable construction. The liquid fuel issues in the form of a cylindrical jet, and
this is met by the steam or compressed air employed in reducing it to spray.
The rear portion B, which is permanently connected to the front part by the
web or piece C, formed integral therewith, is provided with a hollow chamber b,
into which the fuel is admitted through the valves (Fig. 2) and the passage.d,
and from whence it escapes through the passage in the tapering tube or
needle D.
This tube or needle D passes through glands e e¹ in order to avoid leakages of
either liquid or steam.
The tube or needle D is screw threaded at f and has a square at g, so that it
may be turned by means of a key or wrench. By turning it, either in one or
the other direction, its end may be brought nearer to, or removed farther. away
from the nozzle opening a so as to adjust the sectional area of the aperture
allowed for the escape of steam or air under pressure which is admitted to
the space surrounding the end of the needle D by means of the passage a¹.
Atu there is placed a test-plug enabling the needle to be removed for inspection,
while at h there is situated a small nut, enabling the extreme position of the
needle towards the nozzle, to be pre-determined, or adjusted beforehand, as the
needle should in no case be allowed to come into contact with the wall of
5 the nozzle.
The main advantage of this arrangement over similar devices used hitherto are
as follows :
It provides great facility for cleaning and removing the hollow needle as in order
to perform either of these operations it is only necessary to close the valves admitting
the liquid and steam, and to unscrew the plug.
Its adjustment is easy and practically permanent as when once made, it cannot
vary, inasmuch as the needle is made in one piece, and is firmly retained in
position, so that no play or backlash from wear can take place-such as occurs

page_text: between the various movable parts of previous devices of this class, notably in
the recess wherein is located the head of the screw which serves to feed along
the needle.
In the arrangement shown in Figs. 3 and 4 a hollow cylindrical drum or
barrel T, supports a number of burners similar to the one just described, which
are arranged parallel therewith. The central space of the barrel is connected to
the fuel reservoirs by a single passage d'; it being adapted to receive a steam
circulation coily, whereby the liquid fuel may be heated and rendered more
fluid if necessary. The liquid fuel is admitted into each of the diffusers through
the valves S¹ S³ S³ which are arranged so as not to interfere with the removal of the
needle D.
Each burner is provided with a separate pipe whereby it is supplied with steam
or compressed air.
A screw-threaded plug u enables the inner chamber of the barrel to be
inspected and cleaned, it being provided with perforations for the heating
coil xy.
The arrangement presents amongst others the following advantages :-
A single tube is sufficient for feeding the entire apparatus with liquid fuel.
The fuel may be heated preparatory to being divided into spray and, being
thus rendered more fluid, enables a certain amount of steam or compressed air to
be saved.
The size of the complete apparatus is reduced to that minimum which is
consistent with a ready attendance and effective control.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondent I declare that what I claim is :—
1. A liquid fuel burner in which the sectional area of the aperture in the nozzle
for the compressed air or steam is controllable by the displacement of a hollow
needle or tube for the liquid fuel carried and guided by supports, coupled together,
into the interior of one of which supports, steam or air under pressure is admitted,
while liquid fuel enters the other, and means at the rear of the hollow needle or
tube which enable the removal of same and means carried by the needle for
adjusting it substantially as described.
2. A liquid fuel burner comprising a number of nozzles, mounted upon a drum
or chamber within which is received the liquid fuel, such chamber being provided
with means for heating the liquid fuel before it enters the nozzles, substantially as
described.
3. The improved construction of burner for liquid fuel substantially as described
and illustrated in Figs. 1 and 2.
4. The improved construction of burner for liquid fuel substantially as described
and illustrated in Figs. 3 and 4.
Dated this 10th day of May 1897
PHILIP M. JUSTICE.