GOVERNMENT OF INDIA.
THE PATENT OFFICE.
1, COUNCILHOUSESTREET, CALCUTTA.
SPECIrICATION
No. 8917. 15th January 1923.
ACCEPTED 25TH JUNE1923.
AN IMPROVED BURNER FOR LIQUID FUEL, CHIEF LY ADAPTED
F OR H EATIN G IN VERTED IN CAN DESCEN T MAN TLES.
ALFRED HUTCHISON,
OF
6,
STONE BUILDINGS, LINCOLN'S INN, LONDON,
ENGLAND, SOLICITOR, ADMINISTRATOR OF THE ESTATE OF EDWIN CLEARY,
DECEASED.
The following specification particularly describes and ascertalos the nature of the
inventton and the manner in which the same is to be performed.
This invention relates to a modified form of the burner for liquid fuel
described in the specification of Letters Patent No. 7466 of 1921, and is
intended to enable such burner to be used for heating inverted incandescent
mantles.
According to this invention the burner comprises a heat conducting plate
that is heated at its underside by the bunter proper and has extending from
its underside a vertical gauze filled tube, to the lower end of which the liquid
fuel is admitted and through which extends the stem of a combined pricker
and valve that controls the delivery of the fuel vapour from the upper end
of the gauge filled tube to the nozzle or nipple from which a jet of vapour
passes into the injector tube, such injector tube being arranged on the upper
side of the heat-conducting plate.
In the accompanying drawing. I have shown how the said invention can
be conveniently and advantageously carried into practice. In these draw ings :—
Figure 1 is a side elevation and
Figure 2 a vertical central sectiOn of a burner constructed according to
the in vention.
Figure 3 is a vertical central section illustrating a modification.
A is the heat-conducting plate, into the lower side of which there is
secured a tube B to receive a tubular filling of wire gauze C. Through the
centre of the wire gauge there extends the stem D of a combined valve and
pricker E. which engages in the bore of the nozzle F, that is screwed into
a socket on the upper side of the plate A.
In the burner shown in Figures 1 and 2, the lower part of the valve stem
D is provided with a screw thread G which engages with a corresponding
screw thread in the inner part of a stuffing box H through which the valve
stem D extends to the exterior. By providing t he valve stew D with an
operating handle J, it can be turned so as to open and closJ the passage
through the nozzle F by means of the needle E and the conical valve E' below
such needle. The lower end of the vertical tube B is mounted on a bracket
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8917
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Price: ONE RUPEE.
K provided with a screw threaded tubular piece L adapted to screw into the
inlet of the fuel container, the bore of such tube communicating with the
interior space of. the tube B through a passage M. The piece L may have a
tubular exteneion, or may fit into the mouth of a tube gktending to the bottom
of a liquid fuel container in tie upper part of which ari. air pressure is main tained in a well known manner.
On the upper side of the heat conducting plate A there is mounted the
U-shaped combined injector tube and mixing chamber, one end part N of
which is made bulbous and provided with one or more air inlets 0, 0. This
end fits over the socket of the nozzle F and communicates through the vertical
tube N with the other limb P of the inverted U-tube, the lower end of which
is drawn down on to the top of the plate A by means of screw threads on
the tubular mixing chamber proper Q which is screwed in from the underside
of khe plate A and is made with a collar or flange Q' for bearing against such
plate. The lower end of the tube Q is closed by a perforated plate R of
nickel, wire gauge or other suitable material.
The plate A is further provided with a cylindrical downward extension
S having bayonet-slots 5 , S' to receive the projections on the supporting ring
of an incandescent mantle as shown. The top of the U -tube Nt, P i s
provided with a pin or projection T to receive a shade of reflector.
In the modification shown in Figure 3, the valve stem D is provided with
a screw thread 1 at its upper end, such screw thread engaging a corresponding
screw thread in the plate A and having one or more longitudinal slots 2 to
permit the passage to the nozzle F of the oil vapour from the vertical tube
B. In this burner, the air-inlet for the injector-tube is made in the form of
a separate piece 3 having a lateral opening 4. An annular cup 5 is arranged
around the tubular piece L to receive methylated spirit or other suitable light
hydrocarbon for use in heating up the burner on starting.
.
1
1
I claim :
1. A liquid fuel burner for heating inverted incandescent mantles, such
burner being of the kind wherein there is a heat conducting plate that is
heated by the burner proper, and wherein there is a wire gauge filled tube
which extends downwards from the underside of the heat conducting plate
and to the lower end of which the liquid fuel is admitted, characterised in
that the delivery of the fuel vapour to the air-injector is controlled by means
of a needle valve which is adapted to fit into the bore or thoroughfare of a
nozzle at the upper end of the gauze-filled tube and the stem of which valve
extends axially through the gauze filled tube, the oil vapour passing from the
nozzle into a curved air-injector tube that is arranged above the heat conducting plate and from whence the combustible gaseous mixture delivered
to the burner proper, which is arranged on the underside of the heat con ducting plate.
2. A constructional form of the burner claimed in Claim 1, wherein the
valve-stem also bears an annular valve wafting with a valve seat at the upper
end of the gauge-filled tube, substantially as described.
3. The improved burner constructed substantially as hereinbefore des cribed with reference to the accompanyinw drawings, for the purposes
specified.
ALFRED HUTCHISON.
By his Attorneys,
REMFRY & SON.
Dated thu 14d day of January 1923.
A. HUTCHI Sal.
Sheet 1.
IVA.
wo.praor 1923.
11 Ur. 3 .