CERTAIN IMPROVEMENTS IN COAL OIL LAMPS
Year: 1866

page_text: LETTERS PATENT to Alfred Vincent Newton, of the Office for Patents,
66, Chancery Lane, in the County of Middlesex, Mechanical Draughts-
man, for the Invention of "CERTAIN IMPROVEMENTS IN COAL OIL LAMPS."
A.communication from abroad by George Hall, of Baltimore, in the
State of Maryland, United States of America.
•
PROVISIONAL SPECIFICATION left by the said Alfred Vincent Newton
at the Office of the Commissioners of Patents, with his Petition, on the
12th November 1866..
I, ALFRED VINCENT NEWTON, of the Office for. Patents, 66, Chancery Lane,
in the County of Middlesex, Mechanical Draughtsman, do hereby declare the
nature of the said Invention for "CERTAIN IMPROVEMENTS IN COAL OIL LAMPS,"
to be as follows:-
:
This Invention relates to that class of coal oil lamps in which no chimney is
used,, and consists in the introduction of certain improvements in details
calculated to increase the efficiency of such lamps. The lamp burner carries
a wick tube as usual, above which stands, a condensing chamber into which
the vapour from the oil enters together with atmospheric air for assisting
combustion; surrounding this chamber is a cap which is retained in position
by a bayonet, fastening. By means of a large number of holes in the lower
part of the lamp burner, atmospheric air has free access to the interior of

page_text: the gas condensing chamber, and also to the annular space or draught chamber
formed by the cap and the gas condensing chamber.
In the bottom part of the gas condensing chamber, and at a suitable distance
above the top end of the wick tube, is an internal flange which is perforated
with an oval aperture of such a shape and size that the oil vapours or gases
emanating from the wick or wick tube on coming in contact with the 'said
flange will be caused to mix intimately with the atmospheric air which enters
through the holes in the base of the burner, and a gas compound is formed
which will produce a good light. The gas condensing chamber which contracts
towards its upper end has a deep slit at top extending down below the slit
in the enclosing cap. The gases as they issue from the chamber are in a
slightly compressed state, and they are brought in contact with a current of
heated atmospheric air passing up through the draught chamber, by which
means a clear, brilliant, and steady flame is produced without the use of a glass
chimney.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Alfred Vincent Newton in the Great Seal Patent Office on the
11th May 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALFRED
VINCENT NEWTON, of the Office for Patents, 66, Chancery Lane, in the County
of Middlesex, Mechanical Draughtsman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twelfth day of November, in the year of our Lord
One thousand eight hundred and sixty-six, in the thirtieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Alfred Vincent Newton, Her special licence that I, the said Alfred
Vincent Newton, my executors, administrators, and assigns, or such others as
I, the said Alfred Vincent Newton, my executors, administrators, and assigns,
should at any time agree with, and no others, from time to time and at all
times thereafter during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"CERTAIN IMPROVEMENTS IN COAL OIL LAMPS," being a communication from
abroad, upon the condition (amongst others) that I, the said Alfred
Vincent Newton, my executors or administrators, by an-instrument in writing
under my, or their, or one of their hands and seals, should particularly.

page_text: describe and ascertain the nature of the said Invention, and in what manner
the same was to be performed,. and cause the same to be filed in the Great
Seal Patent Office within six calendar months next and immediately after the
date of the said Letters Patent.
NOW KNOW YE, that I, the said Alfred Vincent Newton, do hereby declare
the nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement, reference being had to the Drawing hereunto annexed, and to the
letters and figures marked thereon (that is to say):-
This Invention relates to that class of coal oil lamps in which no chimney is
used, and consists in the introduction to the burner of certain improvements in
details calculated to increase the efficiency of such lamps.
In the accompanying Drawing, Fig. 1 represents a vertical central section of
the improved burner taken in the plane, indicated by the line a, x, Fig. 3;
Fig. 2 is a vertical section of the same, the line y, y, Fig: 8 indicating the
plane of section; and Fig. 3 is a horizontal section of the burner, the plane of
section being indicated by the line z, z, Fig. 1. Similar letters of reference
indicate corresponding parts.
A represents the lamp burner which may be secured to the bowl or reservoir
of the lamp by a screw thread or in any other suitable manner. In the
bottom of this burner is fastened the wick tube B, which extends up into the
lower part of the gas condensing chamber C; over this chamber is fitted &
cap D, which is retained in position by a bayonet fastening. The burner
is perforated with a large number of holes, so that the atmospheric air has free
access to the interior of the gas condensing chamber and also to the annular
space or draught chamber formed by the cap and the gas condensing
chamber.
In the bottom part of the gas condensing chamber, and at a suitable
distance above the top end of the wick, tube, is an internal flange a which is
perforated with an oval aperture of such a shape and size (see Fig. 3) that
the oil, vapors, or gases emanating from the wick or wick tube on coming in
contact with the flange will be caused to mix intimately with the atmospheric
air which enters through the holes in the base of the burner, and a gaseous
compound is formed which will produce a good light. The gas condensing
chamber C contracts to a wedge shape in cross section towards its upper end,
and it is provided with a slit 6 which extends down somewhat below the slit c
in the enclosing cap.D. The gases issuing from the chamber C in a slightly
compressed state are brought (by reason of the relation of the slit 6 with the
slit c) in contact with a current of heated atmospheric air passing up through

page_text: the draught chamber, by which means à clear, brilliant, and steady flame is
produced without the use of a glass chimney..
Having now set forth the nature. of 'the Invention of "Improvements in
Coal Oil Lamps," as communicated to me from abroad, and explained the
manner of carrying the same into effect, I wish it to be understood that under
-the above in part recited Letters Patent, I claim,-
First, the described burner for coal oil' lamps without a chimney in which
the gas condensing chamber C is provided with an internal perforated flange a;
substantially as and for the: purpose described.
Second, the slitted gas condenser C combining with the internal bottom
flange a the slitted top, as set forth, 'when the slit 6 in said chamber is shaped
and situated in relation to the slit c in the draught chamber or cap D, as herein
"set forth.
In witness whereof, I, the said Alfred Vincent Newton, have hereunto set
my hand and seal, the Ninth day of May, in the year of our Lord
One thousand eight hundred and sixty-seven.
Witness,
J. W. MOFFATT,
66, Chancery Lane.
A. V. NEWTON. (L.s.)