Improvements in or Additions to Gas Cooking Stoves.
Year: 1899

page_text: Date of Application, 9th Jan., 1899
Complete Specification Left, 6th Oct., 1899-Accepted, 11th Nov.,
1899
PROVISIONAL SPECIFICATION.
Improvements in or Additions to Gas Cooking Stoves.
We, JAMES DAMREL PRIOR, of Chantry Road, Moseley, near the City of
Birmingham, Manufacturer, and HARRY JAMES YATES, Managing Director of
Arden Hill and Company Limited, Gas Engineers, of Salford Street, Aston, near
Birmingham aforesaid, do hereby declare the nature of this invention to be as
follows:
This invention relates to gas cooking stoves or gas cookers, or to an attachment
for gas cooking stoves, and has for its object, to provide for the utilization of
the waste heat given off from such stoves for the purpose of keeping warm or
heating up cooked food, also for warming or heating water and warmning culinary
articles such as plates, dishes and the like.
Our invention consists in providing a gas cooking stove with a supplementary
chamber or box-like attachment interiorly partitioned to compel a circuitous
circulation within it of the heated air and products of combustion passing into it
from the cooker.
In carrying out one form of our invention, we fit to an ordinary gas stove outlet,
one end of an attachment in the form of a flat chamber divided off horizontally
with the divisional diaphragm nearly to that end coming opposite to the inlet,
whilst the outlet to the chamber comes preferably in the same vertical line as the
outlet of the cooker, but with the diaphragm intervening between them, so that
the waste heat is induced to circulate through the attachment and be
distributed by conduction through the metallic walls, either to a.
tray, or to an enclosed or open-topped well, provided. interiorly with racks or
other means for supporting the plates or articles to be heated or kept warm. That
part of the diaphragm interposed between the aforesaid outlets is provided with
an opening fitted with a shutter, or hinged sliding or revolving door or closure
which is operated from the outside and forms both a starter for initiating the
circulation of the waste heat within the attachment and also a damper for
regulating the amount of waste heat to be admitted.
Thus, to create a circulation on the first lighting of the stove, the sliding or
flap door is opened to admit of the products passing direct from the stove outlet
to the outlet of the attachment, and then when sufficient draught or current has
been established the starting door is closed and the current is thereby directed
through the circuitous system.
As another form, the inside of the attachment may be provided with a series
of vertical or other webs or part diaphragms, serving both as means for creating
a circulation of the heated products and for abstracting as much heat as possible
therefrom for conduction to the metal walls of the heating tray or well.
In both forms, the amount of heated air and products circulating within the
system may be regulated by only partially closing the damper, so that a portion
of the said heated air is allowed to pass direct between the outlets.

page_text: As a further form the heater may consist of a jacket into which the waste heat
products are admitted and having depending within it, a well adapted to contain
water to be heated or kept hot, or the said well may be fitted to hold plates or
other utensils to be warmed or kept hot, which is effected by the circulation of
the said heat products between the walls of the jacket and around the outside of
the well. As an additional means for assisting in the warming or heating
operations, an auxiliary burner may be provided, the flame of which is adapted
to play upon the outside of the jacket or casing.
The top of the chamber may be made of corrugated metal, whilst the bottom
thereof may be made to slope into a well or channel so that any condensed 1
moisture or other residue may be removed by a tap or otherwise.
Dated this 7th day of January 1899.
JAMES DAMREL PRIOR,
HARRY JAMES YATES,
By Henry Skerrett,
Agent for Applicants.
Improvements in or Additions to Gas Cooking Stoves,
We, JAMES DAMREL PRIOR, of Chantry Road, Moseley, near the City of
Birmingham, Manufacturer, and HARKY JAMES YATES, Managing Director of
Arden Hill and Company Limited, Gas Engineers, of Salford Street, Aston, near
Birmingham aforesaid, 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:-
This invention relates to gas cooking stores or gas cookers or to an attachment
for gas cooking stoves, and has for its object, to provide for the utilization of
the waste heat given off from such stoves, for the purpose of keeping warm or
heating up cooked food,, also for warming or heating water and warming culinary
articles such as plates, dishes and like.
One form of our invention consists in providing a gas cooking stove with a
supplementary chamber or hot closet attachment, the bottom of which is par-
titioned off and is provided with fins or gills which compel the waste heat and
vapors passing into it from a gas stove to circulate within the said bottom space, and
also serve as a means whereby heat is absorbed and conveyed to the closet either
by conduction, or by conduction and radiation.
According to this form of our invention, the attachment for utilizing the heat
given off from the oven of a gas stove and which is usually wasted, consists
essentially of a chamber or closet adapted to contain food or culinary articles to
be heated and suitably elevated above the stove, from the oven of which, heated
air and products of combustion pass upwardly by a suitable passage or pipe into
a partitioned-off space or spaces within the closet, wherein they are compelled
to circulate and be deprived by absorbtion of a considerable amount of heat, which
is radiated into the interior of the chamber and utilized for heating purposes,
whilst the actual products of combustion pass away by a suitable outlet without
coming into direct contact with food or the like. Suitable means in the form
of a damper is also provided for starting the circulation of the heated vapors
through the absorbtion chamber.
Figure 1 of the accompanying drawings represents, in front elevation, the
upper part of a gas cooking stove provided with a hot closet attachment in

page_text: accordance with one form of our invention, the said closet being supported at a
suitable height above the hot plate of the stove by a pair of brackets.
Figure 2 is a side elevation of the said stove and attachment, showing how
the arrangement of the pipe which leads from the top of the former into the
bottom of the latter.
Figure 3 represents a transverse vertical section of the hot closet upon the
dotted line, whilst Figure 4 is a cross section thereof, taken upon the dotted
line z¹.
Figure 5 represents a horizontal section of the hot closet attachment upon the
dotted line Figure 3, which is taken through the partitioned off space or
supplementary bottom chamber into which the waste gases are led and deprived
of their heat before being allowed to pass away into the open air.
Figure 6 is another horizontal section of the said attachment, but taken upon
the dotted line e³, so as to show in plan the topside of the supplementary chamber,
which forms the bottom upon which articles placed in the closet rest.
The same letters of reference indicate corresponding parts in the several
figures of the drawings.
a, is an ordinary gas cooking stove, with an oven a', and b, is the hot closet
attachment, which is supported above the stove by means of a pair of brackets c
whose feet c¹, are screwed or otherwise attached to the hot plate frame a³.
Leading upwards from the back of the upper part of the oven is a pipe or
passage d, whose top end, takes through the hottom b', of the elevated closet
and terminates in a supplementary chamber or partitioned-off space e, consisting
of a flat top plate or diaphragm e', (which constitutes the rest bottom for sup-
porting articles placed within the closet and extends to within a short distance
of the sides, and back 6) and a curved bottom plate e, whose side edges e³, are
suitably united to those e, of the top plate, whilst the front and buck of the
chamber are closed by ends e³, e, which latter are best shown in Figure 4. The
mouth of the hot-gas pipe d extends into the bottom plate and conducts
the heated air and products of combustion passing upwards from the oven of the
stove into the supplementary chamber near the back thereof, and the said
gases are made to circulate within the chamber by means of vertical gilla or
fins f; f, disposed between the top and bottom plates e¹, 8, and so arranged
(as shown by the longitudinal section Figure 5) that the hot gases are made to
pass forwardly along the middle of the chamber, then round the ends f³, of the
gills or fins, which terminate at a distance from the front end plate, and after
wards back again along the opposite sides before passing outwards through the
pair of openings e, made in the top plate and leading into a common shaft or
chimney, extending at the back of the closet from the bottom chamber to the
top b, which is fitted with an outlet h.
By this arrangement, it follows that the hot gases are compelled to circulate
within the chamber and consequently pass over a considerable metal surface
before being permitted to escape, whereby they are deprived of the greater part
of their heat which is absorbed or taken up by the top, bottom and end plates
and also by the fins of the circulating chamber and then radiated into the
interior of the closet for heating or keeping warm the contents thereof, it being
understood that by curving or dishing the bottom plate and leaving spaces i,
between the edges of the chamber and the sides of the closet, the said bottom
is made available as a radiating surface and the heat radiated therefrom pass
into the bottom air spaces, and thence into the upper or body part of the closet
through the said spaces i. The chimney or shaft g, is also surrounded by air
and in addition to taking up further heat from the escaping gases and radiating
it again to assist in the heating of the closet, it carries away the said gases
without permitting them to come in contact with any food or the like within
the closet, whose contents are heated or kept warm by pure hot air only.
The circulating gills may be in any number and arranged in other manners
than that shown to attain the object required, whilst the closet, which has an

page_text: opening at the front closed by a hinged door j, may be provided interiorly with
racks or other means for supporting the plates or articles to be heated or kept
warni,
A portion of the top plate or diaphragm of the bottom chamber is pierced
with a hole or outlet, leading into the shaft g and coming in a vertical line
with the hot-gas supply pipe and this opening is fitted with a sliding shutter k²,
working in suitable guides, and operated from the front of the closet by a
rod . This device acts both as a starter for initiating the circulation of the
heated gases within the system and also a damper for regulating the amount
of such gases to be admitted into the circulating chamber.
Thus, to create a circulation on the first lighting of the stove, the sliding door
is opened to permit the products passing direct from the pipe, to the outlet k in
the chamber, and then when sufficient draught or current has been established,
the starting door is closed and the current is thereby directed through the cir-
cuitous system.
Instead of employing a sliding shutter as the starting and regulating damper,
we may use a hinged or flat door, or a rotating plate provided with suitable
externally operated means for moving it away from the opening in the top
plate of the circulating chamber, and instead of the hot air being caused to
circulate within a chamber of the form described and illustrated and passing away
through a shaft, the closet may be partitioned off internally in various other
ways. For instance the two sides may be partitioned off into circulating
chambers, which may be employed either alone or in conjunction with a bottom
chamber such as previously described and illustrated. The top also may be
partitioned off and be in communication either directly or otherwise, with the
waste heat supply, or other passages (similar to the shaft g) may be directed
through the closet, the said partitioned-off parts being preferably, in every case,
provided with webs, fins or other means for creating a circulation of the heated
products within, under, through or around the closet and for abstracting as
inuch heat as possible from the said products for conduction to the metal walls
of the partitioned-off parts, from whence it is radiated into the inside of the
hot closet.
In the whole of the forms, the amount of heated air and products circulating
within the system may be regulated by only partially closing the damper, so
that a portion of the said heated air is allowed to pass direct between the outlets.
Instead of curving the bottom plate of the circulating chamber, the same may
be flat in which case the said chamber would preferably be raised above the
bottom plate of the closet, leaving a heating space between the underside of the
chamber and the said closet bottom.
The top of the chamber may be made of corrugated metal whilst the bottom
thereof may be made to slope into a well or channel so that any condensed
moisture or other residue may be removed by a tap or otherwise.
As a further form, the heater may consist of a jacket into which the waste
heat products are admitted and having depending within it, a well or open-
topped chamber adapted to contain water to be heated or kept hot, or the said
well may be fitted to hold plates or other utensils to be warmed or kept hot,
which is effected by the circulation of the said heat products between the walls
of the jacket and around the outside of the well. As an additional means for
assisting the warming or heating operations, an auxiliary burner may be pro-
vided, the flame of which is adapted to play upon the outside of the jacket or
casing.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
First A hat-closet attachment fan
1.
1
1

page_text: heat or hot air and products of combustion escaping from the oven, which are
compelled to circulate within, under through or around the said closet by the
system substantially as herein described and set forth.
Secondly: A hot closet attachment for gas cooking stoves, having a par-
titioned-off bottom chamber, or side chambers, or both bottom and side chambers,
into which hot gases escaping from the oven of the stove are passed and by being
compelled to circulate therein, are deprived of their heat, which is radiated into
the interior of the closet substantially as and for the purpose described and set
forth.
Thirdly: In a hot closet attachment for gas cooking stoves, the employment
of a circulating and heat absorbtion chamber or supplementary compartment,
surrounded by air, or by air spaces such as ¹, communicating with the interior
of the closet, and through which chamber, the hot gases escaping from the
oven are compelled to circulate and be thereby deprived of their heat, which is
radiated into the said closet, substantially as and for the purpose described and
set forth.
Fourthly: An attachment for gas cooking stoves, consisting of a well or open-
topped chamber surrounded by a jacket within which hot gases from the oven of
the stove are made to circulate for heating water or heating articles placed with
the said well or chamber, substantially as herein described.
Dated this 5th day of October 1899.
JAMES DAMREL PRIOR,
HARRY JAMES YATES,
By Henry Skerrett,
24, Temple Row, Birmingham,
Agent for Applicants.

page_text: heat or hot air and products of combustion escaping from the oven, which are
compelled to circulate within, under through or around the said closet by the
system substantially as herein described and set forth.
Secondly: A hot closet attachment for gas cooking stoves, having a par-
titioned-off bottom chamber, or side chambers, or both bottom and side chambers,
into which hot gases escaping from the oven of the store are passed and by being
compelled to circulate therein, are deprived of their heat, which is radiated into
the interior of the closet substantially as and for the purpose described and set
forth.
Thirdly: In a hot closet attachment for gas cooking stoves, the employment
of a circulating and heat absorbtion chamber or supplementary compartment,
surrounded by air, or by air spaces such as ¹, communicating with the interior
of the closet, and through which chamber, the hot gases escaping from the
oven are compelled to circulate and be thereby deprived of their heat, which is
radiated into the said closet, substantially as and for the purpose described and
set forth.
Fourthly: An attachment for gas cooking stoves, consisting of a well or open-
topped chamber surrounded by a jacket within which hot gases from the oven of
the stove are made to circulate for heating water or heating articles placed with
the said well or chamber, substantially as herein described.
Dated this 5th day of October 1899.
JAMES DAMREL PRIOR,
HARRY JAMES YATES,
By Henry Skerrett,
24, Temple Row, Birmingham,
Agent for Applicants.