Improvements in Steam Cooking Apparatus.
Year: 1889

page_text: Date of Application, 23rd Dec., 1889
Complete Specification Left, 31st Jan., 1890-Accepted, 8th Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in Steam Cooking Apparatus.
I, CHRISTIAN KALKBRENNER, manufacturer of 12, Friedrich Strasse, Wiesbaden,
in the German Empire, do hereby declare the nature of this invention to be as
follows:-
My invention relates to an improved steam cooking apparatus, which consists of
three receptacles, two having steam jackets, the thir. is situated in the steam part
of the steam generator and is surrounded by steam. The fire of the generator is
situated directly under the third receptacle, and the steam jackets of the other two
receptacles are supplied from this generator. The steam is then led into a condenser,
where it is condensed. The condensation water is beated by a coil into which the
vapours coming from inside the receptacles are passed and thus a supply of water
already warmed is ready for the generator.
Should the pressure in the generator get too high, a water pipe is arranged
extending upwards and communicating at its lower end with the water of the
generator; this pipe has a branch pipe communicating with the condenser, so that
as soon as the steam has pressure enough to drive the water in the pipe past the
branch leading to the conilenser, i.e as soon as the water sinks below the end of
the branch pipe leading to the condenser, the steam is able to blow off into the
condenser.
At the same time by an arrangement of a water column with intermediate air
chamber, the air is forced along a pipe into an air bag situated in the main flue
of the fire, the air bag consequently swells out and fills up the main flue stopping
up the air circulation to the firc. Further should the water sink still lower and
the pressure increase still more, a pipe is opened up through which the steam
from the generator can exhaust directly into the air. The covers of the three
receptacles are provided with safety valves and the receptacles themselves are
furnished with pipes for letting off the condensation water.
Dated th
1000
CHRISTIAN KALKBRENNER.
By Rayner & Cassell,
37, Chancery Lano, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Steam Cooking Apparatus.
I, CHRISTIAN KALKBRENNER, manufacturer of 12, Friedrich Strasse, Wiesbaden,
in the German Empire, 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 :-
My invention relates to an improved steam cooking apparatus, which consists of
three receptacles, two having steam jackets, the third is situated in the steam part
of the steam generator and is surrounded by steam. The fire of the generator is
situated directly under the third receptacle, and the steam jackets of the other two
receptacles are supplied from this generator. The exhaust steam is then passed into
a condenser, where it is condensed. The condensation water is heated by a pipo
system into which the gases coming from outside the receptacles are passed and thus
a supply of water already warmed is ready for the generator.
Should the pressure in the generator get too high, a water pipe is arranged
extending upwards and communicating at its lower end with the water of the
generator; this pipe has a branch pipe communicating with the condenser, so that

page_text: as soon as the steam has pressure enough to drive the water in the pipe past the
branch leading to the condenser, i.e. as soon as the water sinks below the end of the
branch pipe leading to the condenser, the steam is able to blow off into the condenser.
At the same time by an arrangement of a water column with intermediate air
chamber, the air is forced along a pipe into an air bag situated in the main flue of
the fire, the air bag consequontly swells out and fills up the main flue stopping up
the air circulation to the fire. Further should the water sink still lower and the
pressure increase still more, a pipe is opened up through which the steam from the
generator can exhaust directly into the air. The covers of the three receptacles are
provided with safety valves and the receptacles themselves are furnished with pipes
for letting off the condensation water.
In order to make my invention more clear, I refer to the accompanying drawings
which form part of this Specification and in which similar letters denote similar
parts throughout the several views.
Fig. 1 is a front elevation of the apparatus partly in section.
Fig. 2 is a sectional plan of fig. 1.
Fig. 3 is a vertical section along line a ẞ fig. 2.
Fig. 4 is a detail section of the blow off pipes.
Referring to fig. 1: A A¹ A² are three pans for vegetables, moat and coffee
respectively these pans are supported in the iron frame C. Pan A¹ is situated in the
boiler a having grate d, whilst A and A2 have steam jackets a and a connected with
the boiler by steam pipes C and having stop valves c c. Each pan may be closed
steam tight by its cover B B or B2, and the three covers are provided with safety
valves B B B³. The stean jackets a and a have pipe connections b and b³ with the
boiler allowing the condensation water to return to the boiler; these pipes are provided
with stop cocks 168 which cocks have their handles connected by rods cc² with
steam stop cocks c c respectively so that when the steam cocks are closed the
condensation water cocks will be closed at the same time.
The safety valves B2 B3 B are connected with condenser 03 by the pipes D D¹ and
D'. These pipes enter the condenser at three different points and in order to prevent
the vapours from the various pans from combining, the inlets to the condenser are
partially separated by means of the water partitions ³ h², so that before the vapours
have time to get mixed, they are for the most part condensed.
These vapours enter the separate chamber L in the condenser, which chamber
communicates with the combustion gas outlet and has, further, pipos 1, 1, running
through it which stand in direct connection with the water of the condensor.
The combustion gases from grate d are conducted by pipe 4 through the condenser
and escape above the same.
The condenser forms also a warm water reservoir for filling the boiler. This warm
water reservoir besides being heated by the combustion gasos is also heated by the
hot vapours escaping from the pan, in the manner previously described.
The safety arrangements and the arrangements for regulating the water in the
boiler will now be described. The vertical pipe is connected with the boiler a¹
below the water level of the same. As soon as the steam pressure in the boiler
increases, water will be driven into this pipe d³, passes through the holes in the
same and into the outer pipe E¹. Above pipe E¹ and separated from it by partition E
is situated another pipe communicating with the vertical pipe d' by holes d*.
197
Into this pipe water will be poured which joins the water in d by passing through
holes in the same, so that above the water level in the chamber formed by pipes d
and E an air chamber will be formed. This air chamber communica'es by a pipe e
with a wind bag e¹.
which
This wind bag is situated in the flue of the grate d and is supported by a
perforated plate k covering the same. It has on its lower end a weight k',
weight has the tendency to draw the wind bag e' downwards, thus forcing the air
out of the same when the pressure is removed. As soon now as the steam pressure
in the boiler increases above its normal amount, the water in pipe & will rise, passing
through holes d³ into outer pipe E¹ and compressing the air in this chamber. The

page_text: compressed air passes along pipo e and enters the wind bag e¹ filling out the same.
The flue thus becomes partially stopped up and does not allow so much air to enter
under the grate, whereby the fire becomes less and accordingly the steam pressure in
the boiler reduced.
As soon as this takes place, the water in chamber E' falls and air can escape from
the wind bag back to the air chamber. The wind bag now contracts under influence of
its weight k¹.
In case this regulation should not suffice, there is a second arrangement consisting
of the chamber G' (Fig. 4) connected by pipe G with the boiler at a point further
below the water level than pipe d'; into this chamber G' which is sealed at G³, the
pipe g is introduced and extends so far through the cover G³, that when the water
level in boiler a¹ is normal, the end of pipe g is immersed a few inches. Pipe g
communicates with the pipe system and above with the air outlet pipe g¹.
The pipe g³ is connected with the coil g* in the condenser and 9' is again connected
by g with water pipe d³ ³ is further connected by g with the outlet pipe f' which
pipe has at its upper end the stop cock f, having a handle f' connected by a wire or
chain H' passing over the pulloys H H to the water receptacle Fr. This receptacle
has the air outlet pipe and is connected at its lower and by an india rubber pipe F
with the outlet water chamber E of the vertical pipe d². On the handle the
counterbalance weight F' is arranged to balanced the water receptacle F1 when the
same is empty. is a support for this counterbalance weight F' to prevent
the same from sinking too far.
The operation of this part of the apparatus is as follows: If the pipe d³ and wind
bag do not suffice to regulate the steam pressure and the same continues to increase,
the water level in the boiler falling constantly as soon as it has fallen, a certain small
distance below the normal level, steam will pass out of the boiler along pipe G³
(Fig. 4) and by pipes g & g³ into coil g', where it will be condensed, at the same time
heating the water in this reservoir. The condensed steam passes as water out of the
coil galong connection 9° into vertical pipe d'and thus assists the operation of pipe d'
by increasing the amount of water in the same and consequently further compressing
the air in chamber E' and increasing the size of wind bag e' thus cutting off the air
inlet to the grate.
But this is not the only effect. The water in pipe system d' E' E' rises continually
and passes through the india rubber tube F into the water receptacle F. This receptacle
on being filled out gets heavier than the counterbalance weight F' and opens the
cock F; steam can now pass out of the boiler directly along pipe f¹ into
the air.
The valve g' in pipe connection 9' is under ordinary circumstances closed; but if
the pressure increases in the boiler, it may he opened when it allows steam to pass to
the condenser heating the water in this reservoir and at the same time being con-
densed. By this operation the working of the safety arrangement F F F and
the opening of stop cock f is hindered and the superfluous steam instead of
blowing off into the air, is used to heat the supply water in the condenser.
Having now particularly described and ascertained the nature of my said inven-
ion and in what manner the same is to be performed, I declare that what I
claim is:
In a cooking apparatus
1. The combination of the air regulating apparatus consisting of pipes d'E¹ E
rranged in the manner described, d' connected with the boiler below the water
evel, said pipes having air compressing chamber connected by pipe e with a wind bag
ituated in the flue of the grate and having weight k¹ said wind bag adapted on being
illed to expand and stop up the flue, preventing air circulation to the fire, as described
nd shown.
2. The water regulating and safety arrangements for the boiler consisting of:
a.) The combination of the chamber g¹ G' having pipe connections & and G³
with the boiler, the former below the water level, the latter above the same and

page_text: having further pipe g communicating with the condensing coil g_and_by
valve with blow off pipe, the pipe g arranged in the chamber G¹ so that when
the water level sinks below its end, steam may enter it & after being
condensed pass back to the boiler as water, in the manner described.
b.) The combination of cock f in blow off pipe adapted to be operated by the
weight F communicating by india rubber pipe with the wator in pipes ª E³,
in the manner described.
3. A combined condenser and warm water reservoir, consisting of condensor C³
having coil gt communicating with the boiler and pipe ², water in condensor being
heated by combustion gases from fire box by pipe, and by vapours from the pans
by pipes D D' D* communicating separately with the water reservoir, in the manner
described.
4. The combination with the cooking pans of the boiler combined condenser and
warm water reservoir, water regulating, fire regulating and safety arrangements, in
the manner as described and shown.
Dated this
day or January
CHRISTIAN KALKBRENNER.
By Rayner & Cassell,
37, Chancery Lane, London, W.C., Agents for the Applicant.