IMPROVEMENTS IN LAMPS OR BURNERS FOR MEDICATED SPRAY PRODUCERS AND FOR OTHER HEATING PURPOSES."
Year: 1879

page_text: LETTERS PATENT to David Marr, of Bloomsbury, in the County of Middlesex,
for the Invention of "IMPROVEMENTS IN LAMPS OR BURNERS FOR MEDICATED
SPRAY PRODUCERS AND FOR OTHER HEATING PURPOSES."
PROVISIONAL SPECIFICATION left by the said David Marr at the Office of
the Commissioners of Patents on the 10th July.1879.
DAVID MARR, of Bloomsbury, in the County of Middlesex.
LAMPS OR BURNERS FOR MEDICATED SPRAY PRODUCERS AND FOR OTHER HEATING
PURPOSES."
"IMPROVEMENTS IN
According to this Invention, and specially as applicable to spirit lamps suitable
for heating the disinfecting fluid in the vessel of a medicated spray producer and
for other heating purposes, I fit the closed spirit receptacle with an upright burner
tube having a closed top, and provided with a number of fine holes all round just
below the top. I fit this tube with a metal plate, disc, or saucer, against the under-
side of which the flame from a small wick burner can strike. The tube of this
wick is made to swivel, and has a handle or knob for turning it by; the disc has a
small hole through.
The action of the apparatus is as follows:-When the wick is turned so that
the flame strikes the underside of the disc this latter becomes heated, and the
beat being conveyed to the burner tube aforesaid, and thence to the spirit in the
receptacle, spirit vapours will arise therefrom and issue by the small holes at top of
burner tube, where it will be ignited by a part of the flame from the wick issuing
through the hole in the disc on the burner tube; this hole is a little to one side of
the centre of the wick. By adjusting the wick tube as against the disc on the
burner tube the heat imparted to the latter can be modulated as required, and thus
also the amount of spirit vapour produced, and the heat imparted to the vessel of
the spray producer or other vessel to be heated.
Sometimes I fit the burner tube with an inner tube, which may form an air
supply tube.

page_text: SPECIFICATION-in-pursuance of-the-conditions of the Letters Patent filed by
the said David Marr in the Great Seal Patent Office on the 10th January
1880.
DAVID MARR, of Bloomsbury, in the County of Middlesex. "IMPROVEMENTS IN
LAMPS OR BURNERS FOR MEDICATED SPRAY PRODUCERS AND FOR OTHER HEATING
PURPOSES."
This Invention is specially applicable to a spirit lamp for evaporating the water
contained in the vessel belonging to a so called medicated spray producer, but it
may also be applied to other heating purposes.
And in order that this my Invention may be clearly understood, I will proceed
to describe the same with reference to the accompanying Sheet of Drawings, in
which Figure 1 is a side view, Figure 2 a plan, and Figure 3 a sectional elevation
of a spirit lamp constructed according to this my Invention, and suitable for a
medicated spray producer.
A is the closed receptacle for the spirit which serves to supply the burner. To
the raised chamber A2 on the top of the receptacle A is fitted the burner tube B
containing the wick F, and formed with a closed top. There are a number of fine
holes all round just below the top, as shown. The burner tube B is by preference
formed with a lower surrounding tube or mantle C, and the intervening space is
filled with non-conducting material. I thereby insulate the hot burner tube B from
the socket A', raised chamber A2, and lid A³ of the receptacle A, and keep them
comparatively cool, while at the same time the heat of the burner tube B is wholly
or mainly conveyed down to the spirits in the wick and in the receptacle A. heating
the same.
.
The mantle C of the burner tube is made a good but easy fit in the socket A', so
that it can be turned round and taken out as required. D is an outer tube fixed
on the burner tube B with an intervening air space, as shown. On this tube D,
and near the top of the burner tube B, is fitted a circular or other metal plate D',
which might be of a saucer form, and which has a hole D2 through it.
E is a small tube containing a wick carried down into the receptacle A. The
tube E is made to swivel in a socket in the chamber A2 and has a handle G, which
may be jointed at G¹ to fold up for convenience of packing the apparatus, and which
serves turn the small wick tube E by.
a is a side chamber on the receptacle A, and a¹ a plug for closing it. When this
plug is removed the receptacle may be charged with spirit at this place. H, H, are
knobs-on-the.lid.A2_for_the vessel to be heated to rest upon. As they are made of
heat insulating material, the heat of such vessel is prevented from being conveyed-
to the lid A² by contact.
I and I are staples for inserting the feet of the vessel to be heated. Those
staples are also insulated from the lid A2, and the upper part of one of them I is a
lever, which can be turned to one side to permit the insertion of the foot of the
vessel.
The action of the apparatus is as follows:-
The vessel A having been charged with spirit and the plug A' replaced, the wick
in the small wick tube E is lighted, and the tube E, by means of the handle G,
turned into such a position that the flame strikes the underside of the disc D¹.
This latter then becomes heated, and the heat being conveyed by the outer tube D
to the burner tube B, and thence down to the spirit in the wick F and in the
receptacle A, spirit vapours will arise therefrom, and issue by the small holes at or
near the top of the burner tube B, where they will be ignited by part of the flame
from the small wick tube E issuing through the hole D2 in the disc D'; this hole is
a little to one side of the centre of the small wick tube E. The disc D' I prefer
placing on the outer tube D, instead of directly on the burner tube B, as I thus

page_text: carry the heat imparted to the disc D a little further down, and thereby prevent
charring the top of the wick F in the tube B.
By adjusting the small wick tube E in position relatively to the disc D¹, the heat
imparted to the latter, and hence also the amount of spirit vapour evolved, and
also the heat of the flame from the burner tube B imparted to the spray producer
or other vessel, can be regulated or modulated as required.
And having thus described and ascertained the nature of this my Invention, I
declare that I claim,―
Firstly. The burner tube B having a plate, disc, or saucer D¹ with a hole D2, in
combination with a small swivelled wick tube E, substantially as and for the
purposes set forth.
Secondly. The burner B fitted with outer tube D, and disc D¹, and with mantle C,
substantially as shewn in the Drawings, and for the purposes set forth.
Thirdly. The burner tube B, fitted substantially as shown in the Drawings, in
combination with the swivelling wick tube E and receptacle A, as described and
shown.
In witness whereof, I, the said David Marr, have hereunto set my hand and
seal, this Thirty first day of December, in the year of our Lord One thousand
eight hundred and seventy nine.
DAVID MARR. (L.S.)