Improvements in Apparatus for Heating and Cooking by Gas.
Year: 1890

page_text: Date of Application, 28th July, 1890
Complete Specification Left. 28th Apr., 1891-Accepted, 28th July, 1891
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Heating and Cooking by Gas.
ELI PLATTS GREENWOOD 33 Brompton Street Cheetham Manchester in the
County of Lancashire Engineer, do hereby declare the nature of this invention to
be as follows:-
Improved arrangement for shelf rests, or bearers, for oven tins and grids to slide
on. A suitable space formed by studs, or projections, cast on as distance pieces for
fixing angle iron to for the tins and grids to slide on, so that the hot air can pass
up at the sides without having to cut hot air passages in the oven tins, and so that
a plain deflector tin has entire command of all the hot air in the oven, with the
exception of a hole in the middle of the deflector tin, so that it collects all the hot
air to the centre directly over anything being cooked, that requires browning.
Also an arrangement for browning with the oven burners arranged to have about
half the usual number of holes, or atmospheric gas jets, along the burner at the
bottom of the oven, and the atmospheric gas that usually comes out of the other
half, to all come out of a large hole at the end. Or at various places along the
burner. Or have a separate burner for each pipe, or chamber, so that the Hame
will shoot up one or more pipes, or chambers, which has an elbow at the top (and
at various heights of the oven) of a peculiar shape to spread the heat over the top,
or at various heights over the underside of a deflector tin, directly it comes out of
the elbow, which elbow can have separate valves to open, or close according to
where the heat is required.
Also an improved tap which answers for a main tap, and oven tap, which is
accomplished by two suitable thoroughfares in the plug, which are both open to one
common inlet, and the outlet goes into separate chambers, one to the oven and the
other to the boiling and grilling burners, suitably arranged to regulate the oven
burners without effecting the proper supply to the boiling and grilling burners, and
arranged so that the supply can be cut off both oven and the other burners
simultaneously by the same plug.
Also an improved oven burner to be supplied by two mixing chambers, with
inlets located between the centre and the ends of the burner, and the mixing
chamber to stand at a suitable angle so that they meet opposite, and a suitable
distance from the centre of the burner, so that both chambers can receive their
supply from a combined double jet.
Also an improved gas stove fire for heating and cooking. The brick for the
back of fire to have a number of vertical zigzag projections, with space between
for the hot air, or flame from burner, to pass up and come in contact with the sharp
corners of the brick and iron prongs of a special shape, which is put in from the
front to fit in the recesses of the brick, so that the brick projections and the iron
prongs all get red hot, and specially arranged so that the heat can be utilised for
warming, and cooking, which may also be used with coke, or coal, and also adapted
for being fixed on the ordinary house fire range, to stand out in front of the bars so
that there will be additional space on the top, for pans, or may be attached to gas
range.
Also a water heater, or kettle, arranged for fixing to one side of the cooking
stove, or made so that it can be used as a kettle, with boiling burner on stove top
for heating it, or with separate burner attached to it. It is constructed with a.
number of horizontal cylindrical disc's, with a flat side to form a hot air passage,
and the disc's to be arranged in suitable positions over each other, connected with a
number of tubular stays in a vertical position, which form a passage for the water,
50 that the heat will have to go under and over each disc before passing away..

page_text: There is also a dish for water supply at the top with two pipes attached, one pipe
goes down each side of the heater on the outside, and is attached to the bottom of
a outer cylinder which has a smaller cylinder inside it, so that there is a space
between for the water. When water is poured into the dish it goes down the two
pipes and rises up the space formed by the two cylinders, and flows over the top 5
disc which fills, and also fills the disc's below, by passing through the tubular
stays, and out of the last disc which has a pipe, or a tap, attached to it.
Dated this 26th day of July 1890.
ELI PLATTS GREENWOOD.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Heating and Cooking by Gas.
I, ELI PLATTS GREENWOOD of 33, Brompton Street, Cheetham Manchester,
do hereby declare the nature of my said 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 first to an improved arrangement of shelf-rest and bearer
for supporting oven tins or grids in conjunction with a deflector tin, secondly of an
improved water heater or boiler and thirdly of an improved arrangement of gas
stove fire.
And in order that this my said invention may be the more readily understood
and carried into practical effect I have hereunto annexed a set of drawings
illustrative of my improvements and will now proceed to describe the same with
the assistance of the various figures and letters of reference marked thereon.
Fig. 1 is a front view and Fig. 2 a plan of a gas cooking oven with my improved
shelf rests and bearers and deflector tin shewn applied thereto.
Fig. 3 illustrates a side view of the shelf rests and the method of affixing the
same to the oven side.
Figs. 4 and 5 are front and side views respectively of my improved water heater
or boiler and Fig. 6 is a plan view of Fig. 4.
Figs. 7 and 8 are front and plan views respectively of my improved construction
of gas stove fire and Fig. 9 is a side view of part of Fig. 7.
Referring now to Figs. 1, 2 & 3 of the drawings and the first part of my
invention, a. a are my improved shelf rests or bearers composed of angle iron
castings for the oven tins to slide upon and be supported thereby.
These shelf-rests are arranged to stand away from the sides of the oven b by
means of the distance pieces c and and so form a space or opening d for the hot
air to pass up at each side of the oven without having to cut air spaces in the oven
tins as heretofore. .
The distance pieces c and c' and shelf-rests a. a arc cast or formed in one piece
with suitable end supporting frames e. el and are held in position by the snugs or
projections on the underside of one of the rests a entering the hooks or claws
projecting from the side of the oven b.
The outer edge of the rear supporting frame e' is flush with the oven side whilst
the outer edge of the front supporting frame e enters a recess or cavity in the
front edge of the oven to allow of the ready introduction or withdrawal of the
loose deflector tin or baffle plate i.
This deflector tin or battle plate is by preference situated in the upper portion
of the oven and is supported on the top of any one of the shelf-rests so as to cover
up the air space and have entire command with the exception of its central
orifice of all the heated air as it passes up the sides of the oven and so serve to
deflect the same onto anything being cooked beneath which may require to be
browned.
The first part of my invention also relates to an improved arrangement of
apparatus for the purpose of browning and consists in employing only about half

page_text: the number of gas jets k. k usually employed in the oven burner for cooking
purposes and of supplying the surplus gas which would otherwise issue from the
other half to one common jet or outlet on to several outlets if desired. The
flame of gas issuing from such outlet shoots up a pipe or passage m which is
provided at its top extremity and at various heights along its length with one or
more. elbows n of peculiar shape and construction. These elbows have a bulge o
formed at or near their mouths so as to spread the heat as it issues therefrom and
are each provided with a damper or valve p. to open or close the same according as
the heat is required.
Instead of the crown plate of the oven being made plain as heretofore I provide
the same with a series of ribs or projections. (see Figs. 10 & 11) which form a
rack for supporting plates or dishes to be heated, the heated air from the interior of
the oven making its escape through the holes and circulating beneath the said
dishes.
The second part of my invention relates to an improved construction of water
heater or boiler (see Figs. 4, 5 and 6) which is capable of fitting onto the side of a
cooking oven or of being used as a kettle with a boiling burner on oven top or
provided with a separate burner s as illustrated.
This improved water heater consists of a number of hollow discs t, t arranged in
suitable positions one above another and connected by tubular stays u, u through
which the water may circulate to and fro.
These discs and stays are each arranged so that the heat from the burner below
is caused to go under and over each disc in the direction of the arrows before
passing out into the exit pipe ».
w. is a dish for supplying the water to the heater provided with a set of tubes or
pipes which extending downwards communicate with the water space y formed
by the inner and outer casings of the heater. -
To allow of the violent boiling of the water I provide the bottom disc with a
central tube which rises up to a height slightly above the basin w and through
the open end of which the water may overflow and recirculate through the heater;
this arrangement allowing of the use of the tap or draw off cock .
This improved heater is also provided with an outlet pipe for the escape of
steam.
The circulation of the water through the heater may be described as follows:-
The water poured into the dish or basin w flows down the two pipes a. and
rises up the space y, from whence it finds its way into the top compartment 3 flows
through the tubular stays u. u, fills the several discs below and finally enters the
space which communicates by the passage with the bottom disc and is then
ready to be withdrawn through the draw off cock z¹.
The third part of my invention relates to an improved construction of gas stove
fire (see Figs. 7, 8 & 9) which consists of a fire brick back 1 formed in one or more
parts and set at an angle as illustrated forming an air heating chamber 2 behind.
This said chamber serves to heat the pure air which may be drawn from the
room or compartment in which the stove is situated or from any other convenient
source and which air when heated passes through a series of tubes 3 to be still
further heated ere it passes out through the perforated front 4 of the stove casting
into the compartment.
The fire-brick back of my improved gas stove is provided with a number of zig-
zag projections 5 which serve to deflect the flame of gas as it impinges thereon and
so produce a great heating effect.
In combination with such projections and in front of the fire-brick back a metal
grating 6 is arranged (see detail view Fig. 12) which has a number of sprigs or
prongs of metal which are designed to more or less enter the spaces between the
zig-zag projections and so become heated and augment the heating effect of the
fire.
The waste products in passing to the flue outlet 7, as indicated by the arrow,

page_text: come in contact with the tubes 3 and so become utilised for still further heating
the pure air as hereinbefore mentioned.
The grating 6 is formed in one or more sections and pivoted at the top and
bottom and is of a wavy construction as illustrated so as to compensate for the
sudden expansion and contraction of the parts.
The burner 8 of my improved stove fire extends on both sides of the stove with
one common mixing chamber 9 in the centre.
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 :-
1st. In a gas cooking oven the employment of a deflector tin or baffle plate with
a hole or holes near the centre to fit. the oven at any height in combination with
shelf rests standing away from the oven sides all mounted and operating substantially
as hereinbefore described and illustrated on the accompanying drawing.
2nd. In a gas cooking oven the use and employment of a vertical pipe or passage
with heating burner and elbows or branches for distributing the heat substantially
as and for the purposes herein before described and illustrated on the accompanying
drawings.
3rd. The improved construction and arrangement of discs, tubular stays, water
supplying basin, central tube and outlet tap all constituting my improved water
heater substantially as hereinbefore described and illustrated on the accompanying
drawing.
4th. In a gas stove fire the improved angular construction of fire-brick back with
zig-zag projections, improved grating and air heating tubes and chamber sub-
stantially as hereinbefore described and illustrated on the accompanying drawing.
Dated this 27th day of April 1891
JOHN G. WILSON,
Patent Office, 55, Market Street, Manchester, Agent for the Applicant.