IMPROVEMENTS IN GAS BURNERS OR JETS
Year: 1862

page_text: LETTERS PATENT to Johan Bernhard Giertz, of Great Saint Helen's, in
the City of London, for the Invention of "IMPROVEMENTS IN GAS BURNERS
OR JETS."
Sealed the 17th March 1863, and dated the 19th September 1862.
PROVISIONAL SPECIFICATION left by the said Johan Bernhard Giertz at
the Office of the Commissioners of Patents, with his Petition, on the
19th September 1862.
I, JOHAN BERNHARD GIERTZ, of Great Saint Helen's, in the City of London,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
GAS BURNERS OR JETS," to be as follows:-
This Invention relates more particularly to gas burners or jets known in the
trade as bat-wing and fish-tail burners, and consists in adapting thereto a cap
or cover of metal of the following construction, that is to say, I form a cap or
cover of a dome shape, with a thin flat piece of metal across the centre thereof,
and projecting from the outside thereof about three-eight parts of an inch,
leaving a slit or long opening across the said cap close to each side of the afore-
said flat piece of metal for the escape of gas from the ordinary gas burner or
jet, over which said cap is placed and fits tightly around, leaving space
between and around the inside of the cap, and the outside of the gas burner
or jet for the gas to enter and pass through to form the flame of the burner.
The effect of this arrangement is to obtain a large surface of flame, with a
small quantity of gas, and thus to effect considerable saving in the consumption
of gas.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Johan Bernhard Giertz in the Great Seal Patent Office
on the 19th March 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHAN
BERNHARD GIERTZ, of Great Saint Helen's, in the City of London, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Nineteenth day of September, in the year of our Lord
One thousand eight hundred and sixty-two, in the twenty-sixth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Johan Bernhard Giertz, Her special licence that I, the said Johan Bernhard
Giertz, my executors, administrators, and assigns, or such others as I, the said
Johan Bernhard Giertz, 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 "IMPROVEMENTS IN
GAS BURNERS OR JETS," upon the condition (amongst others) that I, the
said Johan Bernhard Giertz, my executors or administrators, by an 'instru-
ment in writing under my, or their, or one of their hands and seals,
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 Seal Patent Office within six calendar months next and
iminediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Johan Bernhard Giertz, do hereby declare
the nature of my 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, that is to say :-
This Invention relates more particularly to gas burners or jets known in the
trade as "bat-wing" and "fish-tail" burners, and consists in adapting thereto
a cap or cover of metal of the following construction, that is to say, I form a
cap or cover of a dome shape, with a thin flat piece of metal across the centre
thereof, and projecting from the outside thereof, about three-eight parts of an
inch, leaving a slit or long opening across the said cap, close to each side of
the aforesaid flat piece of metal, for the escape of gas from the ordinary gas
burner or jet, over which said cap is placed and fits tightly around, leaving a
space between and around the inside of the cap and the outside of the gas

page_text: burner or jet for the gas to enter and pass through to form the flame of the
burner.
The effect of this arrangement is to obtain a large surface of flame with a
small quantity of gas, and thus to effect considerable saving in the consumption
of gas.
In order to explain my said Invention as completely as possible, I now
proceed to describe the best means I am acquainted with for carrying the
same into practical effect, reference being had to the illustrative Sheet of
Drawings accompanying these Presents, and to the numeral figures and
letters of reference marked thereon respectively, as follows:-
DESCRIPTION OF THE DRAWING.
Figure 1 exhibits a side elevation of my improvements in gas burners or
jets; Figure 2 an edge view of Figure 1 ; Figure 3 a vertical section through
the line A, B, at Figure 2; Figure 4 a top plan view of Figure 2; Figures 5
and 6 detached parts herein-after particularly described and referred to. A
marks an ordinary gas nib or bat-wing burner; B, a cap screwed on to A.
This cap has a slit formed across the top thereof, as at a, Figure 5, and
grooves 6 at opposite sides thereof, into which a thin piece of steel C is
inserted, thus leaving space between each side thereof, and the sides of the.
slit a for the passage of the gas flame.
The effect of the plate Cand cap B is to spread the flame, and thus to
increase the intensity of the light, without increasing the consumption of gas.
Having now fully described the nature and object of my said Invention for
"Improvements in Gas Burners or Jets," together with the best means I am
acquainted with for carrying the same into practical effect, I hereby declare
my Invention to consist in, and I claim combining the cap B and plate C
with an ordinary gas burner, for the purposes above stated.
In witness whereof, I, the said Johan Bernhard Giertz, have hereunto set
my hand and seal, this Eighteenth day of March, in the year of our
Lord One thousand eight hundred and sixty-three.
J. B. GIERTZ. (L.B.)