Improvements in Gas Stoves or Heating-apparatus, applicable also for Cooking Purposes.
Year: 1897

page_text: Date of Application, 11th Dec., 1897-Accepted, 5th Feb., 1898
COMPLETE SPECIFICATION.
Improvements in Gas Stoves or Heating-apparatus, applicable also
for Cooking Purposes.
I, WILHELM KNOPF, of 198, Oranien-Strasse, Berlin, S.O., in the Empire of
Germany, Manufacturer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:
―
The gas heating apparatus herein described, admits of being placed on any
accessible gas burner without any special preparations being necessary.
The said heating apparatus transforms the gas jet into a very extensive blue
flame which develops a considerable heating power, enabling this improved
apparatus to be employed as a convenient means for the rapid heating of apart-
ments as well as for heating liquids, that is to say as a cooking stove.
The invention is represented in the accompanying drawing, in which
Figure 1 is a side elevation of the improved apparatus.
Figure 2 is a vertical central section of the same and
Figure 3 is a plan thereof, the right hand half being a plan of the top while
the left hand half shows an inverted plan or underside view.
The apparatus mainly comprises a short tubular piece e which is fixed on any
existing gas burner or is otherwise connected with a gas feed pipe. This tubular
piece or nozzle carries a semispherical basket f provided with holes for the admis-
sion of atmospheric air. The top of the basket is covered with a sieve h provided
with minute meshes, through which the gas entering at e, as well as the air enter-
ing through the holes in the basket f will pass into a chamber, formed by a tubular
piece d, conically contracted in an upward direction. This tubular piece is like-
wise covered by a sieve or screen g with minute meshes, for the
of ensuring
purpose
a still more intimate mixing of the air and gas. Above the sieve g a plate or
diaphragm i is located which is arranged in a bowl shaped casing, and which is
held in position by means of a cross piece k traversed by a screw-bolt. The bottom
of the bowl or casing a is connected to the tubular piece d and is furnished with
a series of long and narrow slots b. The gas and air mixture on leaving the sieve g,
expands underneath the plate or diaphragm i and passes out through the slots c
where it is ignited and burns with a non-luminous blue flame in an upward direc-
tion upon the outer surface of the bowl a. The latter may be covered over by a
plate c, provided with perforations m, upon which a cooking vessel may be placed.
Thus, the comparatively small amount of gas discharged from the burner e
and passing into the apparatus, is converted into an extensive heating flame and
is in this form most efficiently utilized for developing heat.
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. A gas heating apparatus the characteristic features of which is a bowl or
casing a provided with slots (b) arranged upon a mixing chamber (d) furnished
with air inlet-openings f and sieves (g h), the said apparatus being adapted to be
put on a gas burner or to be connected with a gas feed conduit by means of the

page_text: tubular piece or nozzle (e), so that the gas traversing the said nozzle e in an upward
direction becomes mixed with the air entering through the holes in basket f and
is finely divided by the sieves (h g) and is, on leaving the slots (b) and being ex-
panded by means of a plate i, converted into a blue-burning flame of a large
volume.
2. In the gas heating-apparatus of the kind ascertained in the first Claim the
arrangement of a top-cover c enabling cooking and heating utensils of any descrip-
tion to be put thereon.
Dated this 11th day of December 1897.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.