Improvements in Apparatus for Effecting Combustion of Liquid Fuel for Furnaces and the like.
Year: 1898

page_text: PROVISIONAL
SPECIFICATION.
Improvements in Apparatus for Effecting Combustion of Liquid Fuel
for Furnaces and the like.
.
I, JOHN SOLOMON VIVIAN BICKFORD, of Camborne, in the County of Cornwall.
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to apparatus for effecting combustion of liquid fuel for
heating furnace chambers, crucibles, retorts and the like.
For this purpose I blow air through a pipe, most of the air issuing from the
end of the pipe directed towards the furnace chamber, and part of the air issuing
by lateral holes or slits in jets directed obliquely downwards on a bed of refractory
material such as fragments of fire brick. The oil or liquid fuel flows in regulated
quantity on the upper side of the air pipe just above the lateral holes, and pass-
ing round the pipe to the holes is carried down by the air currents to the
refractory bed below. In starting the apparatus, some combustible material is
laid on the refractory bed and kindled and the oil also burns so that the bed is
shortly heated up and kept heated by the combustion of a portion of the oil.
Most of the oil however is vaporised by the heat of the bed and the vapour
mingles with the air issuing from the end of the air pipe forming a flame which
is directed into the furnace chamber or against the crucible or other object to be
beated.
In the case of a crucible I prefer to direct the flame tangentially into the
chamber containing the crucible so that it sweeps round it. In order to main-
tain regularity in the supply of oil, I prefer to deliver it from a cistern in which
it is kept at a constant level being supplied from a higher closed reservoir, on
the principle of a fountain glass, that is to say, by a pipe just dipping into the
oil in the cistern, so that air can pass up to the closed reservoir allowing oil to
flow down only when the level of the oil in the cistern becomes so far lowered as
to expose the mouth of the pipe.
Dated this 25th day of October 1898
ABEL & IMRAY,
Agents for, the Applicant.

page_text: the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
My invention relates to apparatus for effecting combustion of liquid fuel for
heating furnaces, crucibles, retorts and the like, as I shall describe referring
to the accompanying drawings.
Fig. 1 is a longitudinal section of apparatus according to my invention.
Fig. 2 is an end view of the air nozzle and fuel pipe and Fig. 3 is a section
thereof on the line 3-3 of Fig. 1.
a is a chamber having a removable cover b and having in its bottom a
bed c preferably of refractory material such as fire clay. d is a pipe projecting
into the chamber a. This pipe has on its end a cover through which there is
a central hole e and a slit fin line with a slit g extending some distance along
the lower side of the pipe d. A pipe, terminates in a downwardly directed
bend opening over the pipe d a little behind its end. The pipe d is connected
to a fan or blower of any known suitable kind by which a current of air is sent
along the pipe and is discharged by the hole e and the slits f and g.
h
The pipe h is connected to a reservoir in which oil or other liquid fuel is main-
tained at a constant level so that a regulated supply of the liquid flows along the
pipe and is discharged on the upper side of the pipe d over which it flows pass-
ing round to the underside where it is met and pulverised by the current of air
issuing by the slit g. At first starting the working of the apparatus, burning
fuel, which may be a wad of asbestos soaked in oil or other combustible liquid
is placed on the bed c under the slit g this ignites the mixture of air and pulver-
ised liquid and the flame receives additional air issuing from the hole e and slit f,
a powerfully heating flame being thus directed through an opening at the
opposite side of the chamber a into a furnace or chamber containing a crucible,
retort or the like.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, I declare that what
I claim is:
i
chamber
Apparatus for effecting combustion of liquid fuel, comprising a
having a removable cover, a refractory bed and an opening at one side an air
pipe projecting into the chamber at the side opposite the opening and having
at its end a hole and slit through its cover and a slit along its under side, and a
pipe leading from a reservoir of liquid fuel and terminating in a bend which
opens over the end part of the air pipe, the whole arranged and operating sub-
stantially as described.