Year: 1889

page_text: Date of Application, 9th Mar., 1889
Specification Accepted, 13th Apr.. 1889
I, EDUARD WERDENBERG, of Bâle, in the republic of Switzerland, Gas Stove
Manufacturer, do hereby declare the nature of this invention and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement :-
This invention relates to improvements in gas stoves for cooking purposes and
consists in providing such stoves with small receivers for heating purposes of small
size relatively to the extent of their heating surface and which communicate by means of
The form of these
suitable tubes with a water tank or cistern placed above the stove.
small receivers exactly corresponds with the form of the burners of the stove so that
they are heated direct from the burners as well as by the heat deflected by the sauce-
pans or other kitchen utensils placed on the stove whereby when the burners are
lighted a continuous circulation of the water from the cistern through the receivers
takes place.
These small receivers can be applied to gas cooking stoves of all kinds.
In order to enable my invention to be fully understood 1 will proceed to describe
the same by reference to the accompanying drawings which by way of example shows
my improvements applied to a "Fletcher "gas stove.
Figures 1, 2 and 3 are respectively a side view, a plan, and a horizontal section
of the gas stove.
Figure is a vertical section of part of the lower portion of the stove.
Figure 5 is a top view of the flat heating receiver arranged around the top burners
of the stove and of which only one is shewn in this figure.
Figures 6 and 7 are transverse sections on the lines x, x and y, y respectively of
Figure 5.
At the upper part of the gas cooking stove is arranged the flat receiver A supported
on several feet 1, 12, 13 screwed to the stove and communicating by two pipes B, C
with a cistern D outside the stove (Figure 1). The metal receiver A is formed of
two flat compartments a, a' connected by a pipe b. In larger stoves the receiver A
is formed with three or more flat compartments. The small compartment a¹ is
placed between two burners D°, D₁ and the large compartment a has openings c, c¹

page_text: in which are placed the burners D³, D³ and their supply pipes E, E¹. The com-
partment a is formed on its under surface with a hollowed-out or countersunk
portion V in order to reduce as much as possible the quantity of water in the
receiver A.
The flat compartments e, a¹ extend above the burners Dº, D1, D2, D³ several
millimeters and between the sides of the receiver A and the sides of the burners
there is a small space as shewn in Figure 7 so that the flames from the burners lick
the sides of the receiver A laterally. The arrangement of the burners D³, D³ in the
openings C, C of the receiver A by leaving a small space between the sides of the
burners and the sides of the receiver A has further for object to increase the supply of
air to the burners from their underside as shown by the arrows in Figure 7 so that
by the application of the receiver A a more regular combustion of the gas is effected.
The receiver A is further heated by the flame deffected towards it by the saucepans or
other kitchen utensils placed on the stove.
The receiver A is inclined towards the front of the stove and the pipe B which
communicates by means of the small tubes f, g with the compartiments a, a¹ of the
receiver A puts this receiver in communication with the cistern D the said pipe B
opening into the latter at its lower part, while the pipe C which establishes communi-
cation between the cistern D and the highest rear part of the receiver A opens into the
cistern at several centimeters above the bottom of the cistern.
By reason of the large heating surface of the receiver A relatively to the small
quantity of water contained therein the water of the receiver A is very rapidly heated
on the burners D° D1 D2 D3 being lighted whereby the circulation of the water from
the cistern D through the receiver A is effected in a very short time. This circulation
continues so long as the burners D° D¹ D D³ are alight so that the water of the cistern
will be thus heated.
At the lower part of the stove, that is to say, in the roasting oven, is arranged a
pipe H extending round three sides of the oven which pipe will also utilize the heat
furnished by the two rows of burners F, F' to heat the water from the cistern D.
The pipe H which is placed over the two rows of burners F, F¹ communicates by
means of two vertical pipes K L with the pipes C, B. The end m of the pipe
which is connected by the pipe L with the pipe C is a little higher than the end n of
the pipe which is connected by the pipe K to the pipe B.
The pipe H can be used to heat the water of the cistern D simultaneously with the
receiver A or the heating of the water can be effected either by the receiver A
or by the pipe H.
The receiver A is of copper and all the surfaces are tinned or galvanized with
the exception of the upper surface where the copper remains plain and is polished in
order to more easily absorb the reflected heat.
Owing to the large heating surfaces of the receiver A and the pipe H relatively to
the small quantity of water contained therein I avoid any condensation on their sides
of any water steam contained in the products of combustion of the gas.
From the foregoing description it will be seen that the heat disengaged during the
employment of the cooking stove is utilized for heating the water of the cistern D
without in any way interfering with the cooking operation or increasing the consump-
tion of gas.
The cistern D can be of any suitable size relative to the size of the stove and can be
placed at any suitable height above the stove.
With stoves of large size the cistern D can be put in direct communication with the
water supply of the town by means of a suitable cock such as a ball cock so that the
cistern D can be kept constantly full.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The application to gas cooking stoves of small heater-receivers of small size
relatively to their heating surface and the form of which corresponds with that of the

page_text: gas burners, these receivers, which utilize the waste heat, communicating with a water
tank or cistern are placed in the vicinity of the burners and are heated partly by
direct heat and partly by reflected heat whereby a continuous circulation of the water
from the cistern through the receivers is obtained substantially as hereinbefore
lescribed and illustrated in the accompanying drawings.
2. The manufacture and use of the improved gas cooking stove hereinbefore
lescribed and illustrated in the accompanying drawings.
Data tha Ath day of March 1880
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.