A. NEW OR IMPROVED GAS CARBURETTING APPARATUS
Year: 1885

page_text: I LORENTZ ALBERT GROTH K.G.V Civil Engineer and Proprietor of the Patent
Industrial and Financial Agency 30 Finsbury Pavement London E.C. do hereby
declare the nature of said invention for "A. NEW OR IMPROVED GAS CARBURETTING
APPARATUS a communication to me from abroad by F. Garavagno & Co Manu-
facturers, of 6 Via de Pucci Florence in the Kingdom of Italy to be as follows:-
"
This improved gas carburetting apparatus is composed of a vessel or generator
containing Napthaline. The feeding hole is hermetically closed by a screw cap.
When the gas is turned on it flows down through a tube into the generator and is
there carburetted, it then passes upward between an outside pipe and the admission
tube to the burners. A burner below the generator receiving gas through a small
tube raises the Napthaline to the required temperature and is regulated automati-
cally by a special mechanism (fully described hereafter) so that the temperature in
the generator is invariable independently of any external cause.
A brass spherical casing (opened above and below) protects the generator and
concentrates the heat.
The instantaneous lighting of all the burners is performed by means of a forked
tube along which is drilled a series of small holes at intervals of about inch The
gas is turned into this tube and by lighting the carburetting burner the upper
burners are lighted automatically when the gas is shut off from the lighting tube.
The burner holders may be made as follows:-Under the burner in a ball shaped
recess a valve shaped conically on both sides is attached to a screw with a porcelain
button at its outer end The valve can be screwed up so as to close the opening in
the bottom of the burner thus turning off the gas. By unscrewing the gas is
turned on and the lower cone of the valve fits tightly against the inner surface of
the ball thus preventing any escape of gas or Napthaline.
The automatic regulator is based on the principle of the unequal dilatability of
two metals. It is composed of two strips of steel and copper soldered together
their whole. length with silver solder and bent into a U shape supported at the
bend on a pin by a rivetted clamp The strip of copper having the greater
co-efficient of dilation forms the inner surface of the U.

page_text: One arm of this U shaped strip is held in a fixed position by a spring and a
regulating screw, the other is quite free. A conical valve is soldered to a brass
plate bent at right angles and fixed to the arm that is free A brass plate bent at
right angles and fixed to the framework holds the U shaped strip in proper position
An opening which can be closed by the valve on the free arm allows the gas to pass
through a tube to the carburetting burner.
By means of the regulating screw the valve can be brought nearer to or furthur
from the opening thus diminishing or increasing the temperature in the generator
while another screw serves to prevent the valve closing the aperture more than is
requisite.
The several parts of the regulator are held together by a framework box shaped
at its lower end and has several holes at the upper part.
The regulator rests on a stand in the generator and dips into the Napthaline
steadied by a disk at its upper part which disk has holes bored through it to allow
the gas to pass.
When the gas is turned on and the carburetting burner lit the temperature in
the generator increases and the U shaped strip opens itself owing to its inner
surface having a greater co-efficient of dilation than its outer One arm being held
fast (as before described) the free arm moves from right to left until the conical
valve nearly closes the opening thus lowering the carburetting flame.
The screw prevents the valve from closing the opening altogether and extinguish-
ing the carburetting burner.
If the temperature in the generator be lowered for a moment the contrary effect
takes place
The Ushaped strip closes up and leaves the opening free and the
carburetting flame enlarges and the temperature rises.
This apparatus can be adapted to house illumination, street lamps &c Any
number of burners can be used while if necessary the gas can be introduced from
below The burners can also be brought lower down in which case the inner tube
is dispensed with.

page_text: A New or Improved Gas Carburetting Apparatus.
"
I LORENTZ ALBERT GROTH KGV Civil Engineer and Proprietor of the Patent
Industrial and Financial Agency 30 Finsbury Pavement London E.C. do hereby
declare the nature of the said invention for "A NEW OR IMPROVED GAS CAR-
BURETTING APPARATUS a communication to me from abroad by F. Garavagno & Co
of Florence in the Kingdom of Italy and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:-
This gas carburetting apparatus is composed of a vessel or generator A Fig. 1.
which contains the napthaline The feeding screw B is hermetically closed by a cap
screwed on firmly.
When the gas is turned on it flows down through a tube C into the generator
and is there carburetted It then passes upwards (between the Cylinder F and the
tube c) to the burners d. e. &c.
A burner G below the generator, receiving gas by tube H raises the napthaline
to the required temperature and is regulated automatically by a special piece of
mechanism L (fully described hereafter) so that the temperature in the generator is
invariable independently of any external cause. A. brass spherical covering M. N
(open above and below) protects the generator and concentrates the heat.
The instantaneous lighting of all the burners, is effected by means of a forked
tube R. S. T. U. along which a series of small holes are drilled at intervals of of
an inch. The gas is turned on at V and by lighting in R, the carburetting burner G
and the upper burners D E &e are ignited automatically. The gas is then turned
off at V.
Some of the burner holders as the one marked E are made as follows:-
A valve a shaped conically on both sides is attached to a screw with a porcelain
button c at the outer end The valve a can be screwed up so as to close the
opening b thus turning of the gas. By unscrewing the gas is turned on and
the other cone of the valve is brought to fit down tightly against the inner surface
of the ball avoiding any escape of gas, or napthaline.
The automatic regulator of the carburettor see Figs. 2. 3. and 4 is based on the
principle of the unequal dilatability of two metals. It is composed of two strips of
steel and copper, soldered together their whole length with silver solder and bent
into a U shape (as shown in L. M. N.) supported on the pin I by a rivetted arm H
The strip of copper having the greater co-efficient of dilation forms the inner
surface of the U.
The arm M N of this U shaped strip is held in a fixed position by a spring K
and a regulating screw F The outer arm M L is quite free. A conical valve c is
soldered on a brass plate D (bent at right angles and fixed to the arm ML) A
brass plate E bent at right angles and fixed to the framework holds the U shape
strip in proper position. An opening A which can be closed by the valve c allows
the gas to pass through tube B to the carburetting burner By means of the
regulating screw F the valve can be brought nearer to or further from the
opening A thus diminishing or increasing the temperature in the generator. The
other screw G serves to prevent the valve from closing the aperture A more than is
requisite.
The several parts of the regulator are held together by a framework P which
below the disc Q R is box shaped and has several holes at the upper part,

page_text: The regulator rests on a stand in the generator and dips in the napthaline The
disc QR has holes in it allowing the gas to pass.
When the gas is turned on and the carburetting burner lit, the temperature in
the generator increases and the U shaped strip opens itself owing to its inner
surface having a greater co-efficient of dilatation than the outer. The arm M. N. is
held fast as already described, therefore the free end M. L. moves from right to left
and the conical valve nearly closes the opening A; thus the carburetting flame is
lowered The screw G prevents the valve from closing the opening A altogether
and extinguishing the carburetting burner.
If for some reason the temperature in the generator be lowered for a moment the
contrary effect then takes place The U shaped strip tends to close up and the
opening A is again freed, the carburetting Hame enlarges and the temperature
rises again.
This gas carburetting apparatus serves several purposes. By merely modifying
the shape it can be adapted for suspended lamps (in house illumination) and for
street lanterns. Any number of burners can be used, as those to be excluded can
be closed by screws. If necessary, the ordinary gas can enter from below as is
usually the case when the burners are reduced to two Fig. 5. The burners can also
be brought lower down in which case the inner tube c (Fig. 1) is dispensed with as
shown in Fig. 6.
Figs. 7. 8. and 9 show modifications of the regulator in which the valve is carried
by a thin elastic steel plate A (Figs. 7. 8. and 9.) which is screwed on to the solid
piece.
When the increased temperature causes the U shaped strip to open the brass
plate c (bent at right angles and soldered to the strip) presses against the steel
plate A and the valve closes the opening D.
When the temperature diminishes and the strip closes the pressure on the steel
plate is removed and owing to its elasticity the valve opens.
Another modification consists in abolishing in certain cases (especially when the
gas flows into the apparatus from below) the screw G Fig. 3 in which case the
carburetting burner is kept alight by allowing a small quantity of gas to flow in
from below and regulating by means of a screw a Fig. 6.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1st The gas carburetting apparatus containing napthaline through which the gas
passes heated by a heating flame G lit simultaneously with the ordinary burners D.
& E. by means of perforated tube R. S. T. U. the heating flame being supplied by
means of tube heat regulated by the regulator L.
2nd The regulator composed of two U shaped strips of metal, copper and steel,
(the copper forming the inner strip) soldered together, one end being fixed and the
free end carrying a valve to regulate the admission of gas to the heating flame, the
variations of temperature causing it to contract or expand so opening or closing
the valve.
3rd The whole gas carburetting apparatus as described and illustrated in the
drawings.