Year: 1897

page_text: Date of Application, 2nd Jan., 1897-Accepted, 27th Feb., 1897
1, FERDINAND SCHULTZ of Lünen on the Lippe, Germany, Director of Iron Works,
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:-
In the gas stove of this invention the outer casing is isolated by means of a body
or current of air which is at the same time preliminarily heated for combustion
purposes and the energy of the air draught towards the burners or flames thereby
increased. For this purpose also, special chambers of peculiar form are arranged
around the burners.
The gas stove of the invention is shewn in the accompanying drawing ;
Fig. 1 being a longitudinal section of the same;
Fig. 1a section on line A-B of Fig. 1 ;
Fig. 2 a longitudinal section of a modified construction ;
Fig. 2 a section on line C D of Fig. 2.
Fig. 3 a longitudinal section of another modified construction on line E-F,
Fig. 3 a section on line G-H and
Fig. 3 a section on line J-K of Fig. 4 which latter is a plan view of the stove.
a, a, are chambers provided with orifices c, c', having raised edges b, b', within
which are placed low down the burners d, d', said raised edges conforming to any
suitable shape of burner so as to leave all round an intermediate slit of equal and
properly measured width. The chambers a, a', are only open or can be opened at top:
for the suitable utilisation of the heat proceeding from them.
In the modified constructions shewn, e, e¹, are flues arranged to lead from the
combustion chambers a, a', into the chimney, and i, , are air chambers or passages.
having the double purpose of isolating the outer walls h, h, of the stove from the
combustion chambers and of preliminarily heating the air for combustion. 1, 1, are
apertures in the outer walls h, ', through which air for combustion passes into the
passages i, i, enters the air chamber in a heated state and passes thence to the
burners d, d.
The air for combustion is constrained to pass through a properly measured space
between the raised edges , b', and burners d, d', so as to strike and develope the
flames and increase the generation of heat.
The dirt formed in using the stove collects in the recessed floors of the
chambers a, a', from which it can be easily removed.
The heating of the outer walls h, h', is to a great extent prevented by the isolating
action of the current of air in the air passages. In this way by reason of the air
absorbing heat which otherwise would be an inconvenience, a kind of regenerative fire
is produced which gives a considerable increase of heat as compared with stoves
without the air passages. Another advantage of the invention is that no more air is
admitted to the combustion chambers a, a', than is necessary for feeding the flames,
thereby preventing any diminution of their heating properties. This effect may also
be obtained, when the raised air guiding edges b, b, are dispensed with, by a proper
width of the intermediate slit or distance between the burners and the edges of the
orifices in the bottom of the combustion chambers.

page_text: 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 cooking and heating stove in which the burners are arranged in
combustion chambers underneath the top plate and within apertures in the bottom
of said combustion chambers and of a form corresponding to the burners and
with or without a rim or edge rising up from said combustion chambers, for the
purpose specified, substantially as described and shewn.
2. In the gas cooking and heating stove referred to, the arrangement of air passages
wholly or partially surrounding the combustion chambers, for the purpose specified,
substantially as described and shewn.
TL: ດ. 1
CAPITAINE & VON HERTLING,
89 Chancery Lane, London, W.C., Agents for the Applicant.