An Air Heating Apparatus for Use in connection with Gas Cookers, and for Heating Rooms.
Year: 1895

page_text: Date of Application, 7th Nov., 1895-Accepted, 11th Jan., 1896
COMPLETE SPECIFICATION.
An Air Heating Apparatus for Use in connection with Gas Cookers,
and for Heating Rooms.
I, WILHELM SCHULTZE of 26 Wartenburgerstrasse Berlin, Germany, Merchant,
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 a tubular air heating apparatus which is mainly
designed to be used in connection with gas cookers although it can be employed for
heating rooms of dwelling houses. In the apparatus the heat and products of
combustion from the gas burner or burners are caused to pass through and heat up
tubular chambers within the apparatus and these chambers are caused to impart
their heat to the atmosphere.
On the annexed sheet of drawings
Fig. 1 shows in section one form of the apparatus wherein the hot gases from
the burners are compelled to traverse separately a series of parallel vertical
chambers and
Fig. 2 shows, also in section, another form of the apparatus wherein the hot
gases are compelled to traverse a zig-zag or serpentine arrangement of passages or
chambers.
The apparatus Fig. 1 consists of a cylindrical casing a having its top end provided
with an outlet hole h and its bottom end with an inlet hole g. Fitted in the casing are
two horizontal partitions ij, into which tubes b are fitted at intervals apart so as to
leave spaces c between them. Openings d are made in the sides of the casing at the top
and bottom. The casing is fitted on a hollow base e below which the gas burner or
burners fis or are located. The hot gases and air pass from the base e up through
the hole g to and through the tubular chambers or passages b and heat their walls finally
escaping through the hole h in the top of the casing. Cold atmospheric air enters
the openings d at the bottom of the casing, and, coming in contact with the
heated tubes 6 is heated and rarefied so that it ascends within the casing a and
escapes as hot air through the upper holes d.
In the arrangement shown at Fig. 2 the hot gases from the burner fare caused
to follow a serpentine or zig-zag course first up the tubular chamber b, then
down the chamber b' and up again through the chamber to the outlet h.
When the invention is applied to gas cookers, the casing a with its tubes is
mounted on top of the cooker and the hot gases therefrom are caused to circulate
or pass through the tubes b before escaping to the chimney or into the air. In this
case of course the gas burners fare dispensed with.
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 heating apparatus for use in connection with gas cookers consisting of a
closed cylindrical casing through which atmospheric air can circulate supported on
a hollow base placed above one or more gas burners, said casing having tubular
chambers through which the hot gases and products of combustion from the burner
or burners are caused to pass, substantially as and for the purpose set forth.

page_text: 2. The construction of the apparatus with its series of parallel tubular chambers b
for the hot gases, substantially as herein before described and shown at Fig. 1 of
the drawings annexed.
3. The modified construction of the apparatus with its zig-zag or serpentine
arrangement of tubular chambers b, b', b², substantially as herein before described
-and shown at Fig. 2 of the drawings annexed.
Dated this 6th day of November 1895.
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.