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

page_text: Date of Application, 11th Sept., 1899
Complete Specification Left, 11th June, 1900-Accepted, 4th Aug., 1900
PROVISIONAL SPECIFICATION.
Improvements in or Additions to Gas Cooking Stoves.
We, JAMES DAMREL PRIOR, of Penlee, Chantry Road, Moseley, near the City
of Birmingham, Director of Company, and HARRY JAMES YATES, of Weedon,
Anchorage Road, Sutton Coldfield, near Birmingham aforesaid, Director of
Company, do hereby declare the nature of this invention to be gas follows:-
This invention has reference to gas cooking stoves or gas cookers, or to attach-
ments for such stoves, and has for its object, to provide means whereby the waste
heat given off from such stoves may be utilized for the purpose of heating water,
or for heating hot closets, chambers or rests within or upon which various
kept warm may be placed.
articles or foods to be warmed, or
In carrying out one form of our invention as applied to a water heater, we
arange within the inside crown of a gas cooking stove and above the heat
deflector plate of the oven, which may have the usual defending teats, a hori-
zontally disposed and shallow water-boiler, alike unto a closed pan, with its
underside having a series of longitudinally-directed and separate gills, webs,
or studs, running from the front to the back of the stove or oven, adapted to
collect heat and convey it through the metal bottom of the boiler to the water
contained within it. The deflector plate is pierced near its front with one or more
openings by which heated air and products of combustion from the oven enter
the space or chamber in the roof within which the boiler is fitted and after
circulating through and around the heat-collecting gills, the air and products
pass outwards through a flue near the back of the said chamber.
In a low pressure boiler, we propose that the back part should be extended
upwards or it may be contained into an upright and elevated tank for containing
A tap is also fitted either direct into the boiler or con-
a store of hot water.
nected to a pipe for drawing off hot water, whilst the boiler may be filled either
through an inlet provided for the purpose, or through the top. In a high
pressure boiler, the same may be provided with a system of water circulating
pipes.
The shallow boiler or tank may have wells sunken into the top to receive
saucepans or other articles requiring to be heated, or it may have side walls
66 ban-marie."
round the top to form a
In applying our invention to the heating of hot closets or chambers in which
foods or culinary articles such as plates are placed for warming them, or keep-
ing them warm, an elevated chamber or closet is suitably supported above the
5 top of a gas cooker and we utilize the waste heat from the oven for heating the
same by locating within the space between the crown of the oven and the deflector
plate, an air-heating chamber with the said space being in communication with
the said oven through holes near the front of the deflector plate, whilst air and
products of combustion from which the heat has been extracted, pass away
0 through a flue at the back. The shallow air-heating chamber is open to the
atmosphere at the front and has heat-collecting gills or bafflers on its underside
by which the heated air entering the space is made to circulate over the greatest

page_text: possible amount of heat-absorbing surface, so that pure air, after entering
through the open front, is thoroughly heated by the hot walls of the chamber
and then passes upwardly through a suitable pipe or pipes into the elevated
hot closet, the top of which may have an outlet fitted with a damper for inducing
the circulation of pure heated air through the system.
The door at the front of the hot closet may be provided with a special form
of hinge for holding it up in its open position, and thus may consist of a pair
of hook hinges upon the top edge, and arranged to enter a pair of gaps or clear-
ances having inclined bottom edges. Above one end of each gap is a clearance
slot or gap into which the termination of the joint hook passes when the door
of the closet is closed whilst arranged above the other end of the gap is a solid
portion so disposed that on the door being turned up by a suitable handle and
then allowed to slightly drop with the hooks running down the inclines of the
gaps, the said hooks come underneath the solid abutments which hold the door
in its open position.
This system of hinging the hot closet door is equally applicable to the doors
and other hinged parts of gas cookers generally.
We, JAMES DAMREL PRIOR, of Penlee, Chantry Road, Moseley, near the City
of Birmingham, Director of Company, and HARRY JAMES YATES, of Anchorage
Road, Sutton, Coldfield, near Birmingham aforesaid, Director of Company, 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 follow-
ing statement : —
This invention has reference to gas cooking stoves or gas cookers, or to attach-
ments for such stoves, and has for its object to provide means whereby the waste
heat given off from such stoves may be utilized for the purpose of heating water,
or for heating hot closets, chambers or rests within or upon which various
articles or foods to be warmed or kept warm may be placed.
Figure 1 of the accompanying drawings represents a front elevation of a gas
cooking stove, the top of which is fitted with a high pressure boiler for circulat-
ing purposes, heated by the waste heat from the oven of the stove in accordance
with one form of our improvements. In this view, the upper part of the stove
is shown in vertical section with the boiler in elevation, to better exemplify
the arrangement of these parts.
Figure 2 is a side elevation of the said stove, with both the boiler and the
upper part in transverse vertical section.
Figure 3 represents a horizontal section of the said stove upon the dotted
line, Figure 1, with the position of the boiler being indicated by dotted lines.
The same letters of reference indicate corresponding parts in the said Figures 1,
2 and 3.
In carrying out this form of our invention, we support within the crown a'
of a gas cooking stove a, and above the heat deflector plate a² of the oven a³, a hori-
zontally disposed shallow water-boiler b, alike unto a closed pan, with its under-
side having a series of longitudinally-directed and separated gills or webs b¹

page_text: running from the front to the back of the stove or oven, which increases the
superficial area over which the products of combustion have to pass, and collect
heat and convey it through the metal bottom of the boiler to the water con-
tained within it. The deflector plate is pierced near its front with a series of
openings e, by which heated air and products of combustion from the oven enter
the top chamber or space d within which the boiler is fitted, and pass along
underneath the bottom of the said boiler, whose gills abstract the heat and
utilize it for heating the boiler. The products of combustion pass away from
the back of the chamber d, by way of the flue e.
Two pipes f, f, are screwed into the top of the boiler for connecting the same
with the circulating cistern or the like. The boiler itself may be supported
in any convenient manner but its top side is preferably made to come flush with
the top plate of the stove so as to present no impediment to the placing of various
articles thereon for keeping them warm, or like purposes. For the better dis-
tribution of the absorbed heat to the water within the boiler, the inside as well
as the outside may be provided with gills or their equivalent, with which the
water is in contact.
Figure 4 represents a gas stove provided or fitted with a low pressure boiler
heated by the utilization of the heat abstracted from the waste products of com-
bustion from the oven.
b is the boiler, which as in the preceding arrangement, lies within a chamber
or space d, between the top plate or crown a¹, of the stove and the deflector
plate a² of the oven, and has a series of gills or webs 61 running along its
bottom. The products of combustion from the oven pass through the openings e
in the deflector plate into the interior of the chamber d, under the boiler and
away through the flue e, and are deprived of their heat by the gills ¹, which
heat is utilized for boiling or keeping hot water within the boiler b.
We propose that the back part 6 of the boiler should be extended upwards
or continued into an upright and elevated tank or reservoir for containing a
store of hot water. A tap is also fitted either direct into the boiler as marked b³,
in Figure 4, or is connected to a pipe for drawing off hot water, whilst the boiler
may be filled either through an inlet provided for the purpose, or through the
top.
The shallow boiler or tank may have wells sunken into the top to receive
saucepans or other articles requiring to be heated, or it may have side walls
round the top to form a "bain-marie."
To ensure a more complete absorption of the heat from the products of com-
bustion, we may arrange the gills on the underside of the boiler or heater in
the manner represented in Figure 5. The boiler b and absorption gills 61, in
this form, fill up the whole of the space between the crown and deflector plate,
with the gills 61 depending from the bottom onto the top side of the deflector
plate and being arranged in the manner as represented, they compel the hot air
from the oven to circulate under the bottom of the boiler. In this modification,
only a single outlet a from the oven, is provided in the deflector plate in com-
municating with the circulating space and a is the outlet pipe.
Figure 6 is a sectional view showing the application of our invention to the
heating of hot closets or chambers in which foods or culinary articles such as
An elevated
plates are placed for warming them, or keeping them warm.
chamber or closet f is suitably supported above the top of a gas cooker a, and
we utilize the waste heat from the oven for heating the same by locating
within the space d, between the crown of the stove a¹ and the oven deflector
plate a², an air-heating chamber b with the said space d, being in communication
with the said oven through holes near the front of the deflector plate, whilst
the air and products of combustion from which the heat has been extracted,
pass away through a flue at the back. The shallow air-heating chamber is open
to the atmosphere at the front 63 and has heat-collecting gills 6', on its under-
side for absorbing as much as possible of the heat from the waste products of

page_text: combustion passing along it. Pure air from the atmosphere after entering the
heating chamber through the open front 63, is thoroughly heated by the hot
walls of the said chamber and then passes upwardly through a suitable pipe f
(or pipes) into the elevated hot closet, which may be fitted with a damper f
for inducing the circulation of pure heated air through the system.
The heat absorption gills, in all the preceding forms may be arranged at the
top, or at both top and bottom of the boiler or heater and the products of com-
bustion may be arranged to pass or circulate over the top of the same instead
of along the bottom.
The door at the front of the hot closet may be provided with a special form
of hinge for holding it up in its open position.
Figure 7 represents a front elevation of a hot closet fitted with a door mounted
in accordance with this part of my invention. This view shows the door closed,
whilst Figure 8 is a similar view, but showing the door open or lifted up and
retained in its open position.
Figure 9 represents a vertical section of Figure 7 upon the dotted line a',
and Figure 10 a vertical section of Figure 8 upon the dotted line <³.
Figure 11 is an elevation of the back or inner side of the door frame of a hot-
closet.
The special form of joint represented in the said Figures 7 to 11 consists of
a pair of hook hinges upon the top edge 2 of the door g, and arranged to
enter a pair of gaps or clearances h³, in the door frame h, having inclined bottom
edges h² Above one end of each gap is a clearance slot or gap h³ into which the
tip or termination 93 of the joint hook passes when the door of the closet is closed,
whilst arranged above the other end of the gap is a projecting lug or solid
portion h, so disposed that on the door being turned up by a suitable handle g',
and then allowed to slightly drop with the hooks running down the inclines
of the gaps, the tips of the said hooks come underneath the lugs or solid abut-
ments which hold the door in its open position, as represented in Figure 8.
This system of hinging the hot closet door is equally applicable to the doors
and other hinged parts of gas cookers generally.
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 In gas cooking stoves, the employment in connection therewith, of a
high or low pressure boiler or heater for water and other purposes, heated by
the hot air and waste products of combustion from the stove, which are com-
pelled to pass or circulate in direct contact with, under or around the said
boiler or heater, and be deprived of their heat by absorption gills or their
equivalent, substantially as herein described and also as set forth in the accom-
panying drawings.
Secondly: In gas cooking stoves, the employment of a hot closet heated by
pure atmospheric air through the medium of the hot air and products of com-
bustion from the oven being compelled to pass or circulate under, over or around
an air chamber, arranged in the top of the stove, and being open at one end
or part to the atmosphere and having communication with the interior of the
hot closet, the said chamber being also provided with gills or their equivalent
for increasing the heat absorption surface, substantially as herein described,
and also as set forth in the accompanying drawings.
Thirdly-In gas cooking stoves provided with water boilers or air or like
heaters, heated by the utilization of the hot air and products of combustion
from the oven; the arrangement or disposition of the heat-absorption gills for
increasing the surface over which the said products of combustion are passed
in direct contact, substantially as herein described, and also as set forth in the
accompanying drawings.
Fourthly In the doors of hot closets and other parts of gas-cooking stoves,

page_text: the employment of joints or hinges, consisting of hooks or their equivalent on
the door, engaging with elongated slots in the door frame, which hooks, when
the door is raised, are, by a lateral movement of the said door, engaged under
lugs or abutments formed on the said frame, whereby the door is temporily
affixed in its open position, substantially as herein described and also as set
forth in Figures 7 to 11 of the accompanying drawings.
1
B T
1000
Dutc
THC
JAMES DAMREL PRIOR.
HARRY JAMES YATES
By Henry Skerrett,
24, Temple Row, Birmingham, Agent for Applicants.