AN IMPROVEMENT IN LAMPS WHEREIN GAS IS BURNED.”
Year: 1873

page_text: LETTERS PATENT to William Harvie, of Glasgow, in the County of
Lanark, North Britain, for the Invention of "AN IMPROVEMENT IN
LAMPS WHEREIN GAS IS BURNED.”
PROVISIONAL SPECIFICATION left by the said William Harvie at the
Office of the Commissioners of Patents, with his Petition, on the
18th April 1873.
I, WILLIAM HARVIE, of Glasgow, in the County of Lanark, North
Britain, do hereby declare the nature of the said Invention of "AN
IMPROVEMENT IN LAMPS WHEREIN GAS IS BURNED," to be as follows, that is to
say :-
This Invention which relates to an improvement in lamps wherein
gas is burned is specially applicable to harbour, river, and other lights
wherein a large illuminating power is required; it is also applicable for
street lamps and lights on the outside of shop windows.
The Invention consists in constructing circular, annular, or argand gas
burners with tubes extending downwards to the hollow space or bottom.
of the lanthorns, such as that set forth in the Specification of Letters
Patent granted to William Harvie, No. 1493, 1868. By means of these

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Harvie in the Great Seal Patent Office on
the 18th October 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
HARVIE, of Glasgow, in the. County of Lanark, North Britain, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighteenth day of April, in the year
of our Lord One thousand eight hundred and seventy-three, in the 36th
year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said William Harvie, Her special license that
I, the said William Harvie, my executors, administrators, and assigns, or
such others as I, the said William Harvie, my executors, administrators,
or 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 "AN IMPROVEMENT IN LAMPS WHEREIN GAS IS
BURNED," upon the condition (amongst others) that I, the said William
Harvie, by an instrument in writing under my hand and seal, should
particularly 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 Scal Patent Office within six calender
months next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Harvie, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement, reference being had to the accompanying Drawings,
and to the letters and figures marked thereon, that is to say:-
My said Invention, which relates to an improvement in lamps wherein
gas is burned, is specially applicable to harbour, river, and other lights
wherein a large illuminating power is required; it is also applicable to
reflected lights for the outside of shop windows.

page_text: The Invention consists in constructing circular, annular, or argand
gas burners with tubes extending downwards to the bottom of the
lanthorn, by which means currents of air are directed on the flame and
improved illumination results.
And in order that my said Invention may be properly understood, I
_now proceed more particularly to set forth the system, mode, or manner
in or under which the same is or may be used or practically carried into
effect, that is to say :-
On the Sheet of Drawings hereunto appended Figure 1 is a vertical
section of a circular gas burner constructed in accordance with my said
Invention; Figure 2 is a plan of the upper end of the burner; and
Figure 3 is a plan looking from the lower end of the burner upwards.
As shewn by these Figures two concentric gas burners A and B per-
forated at their upper ends are employed, and into which the gas is..
conducted through pipes C, D. The lower ends of the burners A and B
are secured in a holder E by which they are retained in position in the
lanthorn. At the interior of the burner A is a channel or passage F
extending downwards to the hollow space at the bottom of the lanthorn,
which is or may be constructed similar to the lanthorn set forth in the.
Specification of Letters Patent granted to me, the said William Harvie,
Number 1493, 1868, and through the said channel F a current of air
passes upwards and is directed on the inner side of the flame of the
burning gas issuing from the burner A. An annular space G is situated
between the outer side of the burner A. and the inner side of the burner
B through which a current of air passes upwards impinging on the outer
side of the flame from the burner A, and also on the inner side of the
flame from the burner B. On the outer side of the burner B an annular
space is also formed by a tube H which surrounds the burner, and
through the said space an air current passes upwards which impinges
upon the outer space of the flame from the burner B. By means of this
arrangement of directing air on the flame the illuminating power of the

page_text: their lower ends with a hollow space at the bottom of the lanthorn for
preventing atmospheric disturbances from affecting the flame, as herein-
before set forth the lower ends of the said spaces may be made to
communicate directly with the atmosphere.
Instead of employing the improvement constituting my said Invention
in conjunction with two concentric gas burners, as shown at Figures 1, 2,
and 3 of the Drawings, the said improvement may be adapted to any
other number of gas burners, it being always understood that whatever
number of gas burners are employed an air channel or passage is so
situated as to direct an air current on both the inner and outer sides of
the flame.
Figure 4 is a vertical section, and Figure 5, a plan of a simple argand
gas burner illustrating the adaptation of my Invention thereto. A
current of air passes up through the channel A at the interior of the
burner B, and impinges upon the inner side of the flame, and an air
current is also conducted upwards through the channel or passage C
formed by the tube D surrounding the burner, which current is directed
on the outer side of the flame. The tube D is extended downwards to
the bottom of the lanthorn.
Having now described and particularly ascertained the nature of my
said Invention, and the system, mode, or manner in or under which the
same is or may be used or practically carried into effect, I would observe
in conclusion that what I consider to be novel and original, and there-
fore claim as the Invention secured to me by the herein-before in part
recited Letters Patent is, the arrangement and construction of argand
gas burners having tubes or passages situated as shewn on the appended
Drawings, by which currents of air are directed on the flame or flames
at the inner and outer sides thereof, as herein-before described.
In witness whereof, I, the said William Harvie, have hereunto set
my hand and seal, this Seventeenth day of October, One thousand
eight hundred and seventy-three.