Improvements in Gas and other Stoves.
Year: 1891

page_text: Date of Application, 14th Jan., 1891-Accepted, 28th Mar., 1891
COMPLETE SPECIFICATION.
Improvements in Gas and other Stoves.
I, HERBERT JOHN HADDAN, of the firm of Herbert & Co., Patent Agents,
of 18, Buckingham Street, Strand, W.C., London, Civil Engineer, do hereby
declare the nature of this invention, a communication to me from abroad by Edward
Grube, of No. 9, Albertstrasse, Hamburg, in the Empire of Germany, Machine
Manufacturer, and in what manner the same is to be performed, to be par-
ticularly described and ascertained in and by the following statement :-
This invention relates to cooking stoves and principally to gas cooking stoves and
the improvements relate to the construction of the grid or grating on which the
cooking vessels are placed and to gas feed for supplying the burner. The grating,
which serves for the support of the cooking-utensils, is constructed in the manner
somewhat similar to a venetian shutter, so that the intervals between the grate-bars
may be set for a certain maximum width of opening, or closed completely, or set
at any desired width less than the maximum. By this means the influence upon
the cooking appliances of the heating flames which burn underneath the above
said grating may be easily regulated, or upon the complete closure of the shutter-like
grating the direct touch of the flame upon the cooking-utensils is prevented, the
grating then acting as a complete solid surface, which is heated and will diffuse or
distribute the heat. This grid is applicable to similar cooking stoves heated by
means other than gas.
The improvement in the gas feed of the burner is as follows: The burner supply
pipe which is connected with the main gas-supply pipe by a rubber tube is placed
loosely into the stove-frame and so that it will be located for a considerable length
directly above or in the flames from the burner, whilst at the same time the end of
this burner supply pipe is bent to project within a hood or air-inlet into the burner,
in order to produce the well known action of a Bunsen burner. The gas is thus
heated in the burner supply pipe during the working of the stove, it expands and
gives greater effect in use. By loosely inserting the said supply pipe in holes in
the frame and fixing it by screwing at the connection o¹¹, it can be removed by
unscrewing at said part to separate the burner-parts in an easy fashion to provide
access for the purpose of cleansing.
The improved gas-cooking stove is illustrated in the accompanying drawing in
Fig. 3
which Fig. 1 is a front elevation in section and Fig. 2 a plan of the stove.
is a section on line Fig. 2 but showing the shutter like grating closed and Fig. 4
is an end elevation of the stove, the rack-bar used for operating the shutter grating
being shown in section. The grating, which serves for receiving the utensils or
which are journalled
objects to be heated, is composed of a series of bars a a
eccentrically at their ends to rotate in the frame B of the stove, and have such a
shape, that by turning the separate bars they increase or diminish the intervals
separating them or close them altogether at option. For moving the grate bars a
movable rod H provided with teeth n, is supported in the frame A underneath the
grate-bars and its teeth abut against the sides of the bars. Fig. 1 and 3 show how
by a displacement of the rod H provided with the buttons o and o' limiting the
Between these two utmost
displacement, the grate will be opened or closed.
positions (Fig. 1 open and Fig. 3 perfectly closed) the bars may be set to diminish
more or less the open intervals between the bars. The heating flames E touch the
cooking utensil K when the grate is open (Fig. 1) whilst when the grate is closed
the former is shut off from the direct influence of the flame.
As regards the above named pre-heating of the gas, the gas-supply-tube p which
is to be connected with the gas conductor by a rubber-tube at d is loosely passed
through holes in the frame A. As will be seen the flames heat the tube p in this

page_text: position, as soon as the stove is in working, whilst the opening e of the tube p
terminates within the hood g which forms the air-inlet and operates in the known
manner.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
1. In a stove, a shutter-grate consisting of a series of grate-bars loosely pivoted to
rotate in the stove-frame in combination with a rack-bar displaceable in the frame,
and engaging with said grate bars whereby the intervals between the bars can be
adjusted within a maximum limit or closed entirely substantially as set forth.
2. In a gas-heating stove, a gas-supply-pipe passed removably through holes in
the frame of the stove, whereby said pipe is located above or in the flames of the
burner, said pipe terminating within the air-inlet hood of the burner, substantially
as set forth.
Dated thin 14th 1
1001
TOUT
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents for the Applicant,