Improvements in Gas Cooking Stoves.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Gas Cooking Stoves.
I, ROBERT PRINGLE, of 11, Eliot Park, Blackheath, in the County of Kent,
Doctor of Medicine, Brigade-Surgeon, Lieut-Colonel (Retired), do hereby declare
the nature of this invention to be as follows:
My invention relates to improvements in connection with the gas cooking
stove forming the subject of a previous application for Letters Patent dated the
1st day of April 1897, No. 8405; and the improvement has particular reference to
the provision of burners for heating vessels placed upon the stove and to the supply
to said burners of heat regenerated gas, that is to say gas which has been previously
heated by passing through a heat regenerating pipe or chamber traversing one of
the flues of the stove and to the utilization for supporting combustion of the said
gas of the hot air and gaseous products coming from the interior of the cooking
stove so that not only is the heat of the escaping air utilized directly for heating
the vessels placed over the said burners but also for effecting the complete com-
bustion of the regeneratively heated gas at said burners at the same time that all
odour of cooking is destroyed by the heat of the flames.
The burners are preferably ring burners located over the apertures in the top of
the stove at which the products escape and they are carried by pivotally swinging
arms, and supplied with gas from the gas heater through pipes which pass up inside
the stove so as to maintain or still further increase the heat of the gas the pipes
passing out through the side of the casing at the upper part where they are provided
with stop cocks to control the supply of gas to the burners and with sockets in
which the burner carrying arms are pivoted so that they may be swung entirely
aside when not required for use. The burners are surrounded by kettle supporting
casings which confine the hot air and products escaping from the stove and cause
the same to come into intimate contact with. the flaines, and which are removable
to admit of swinging the burners entirely aside so as to leave the whole top surface
of the oven unencumbered and available as a hot plate. When the burners are thus
swung aside the stove would be surmounted by a removable grating or by an
additional oven or ovens fitting together in superposed order.
Instead of, or in addition to, lagging the sides of the casing of the stove it may
be water-jacketted or otherwise constructed so as to provide a water heater for the
supply of hot water for general purposes.

page_text: -
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:.
My invention relates to improvements in connection with the gas cooking stove
forming the subject of a previous application for Letters Patent dated the 1st day
of April 1897 No. 8405, and the improvement has particular reference to the pro-
vision of additional and external burners for heating vessels placed upon the stove;
also to the supply to said burners of heat regenerated gas (that is to say gas which
has been previously heated by passing through a heat regenerating pipe or chamber
traversing one of the flues of the stove); and further, to the utilization for support-
ing combustion of the said gas, of the hot air coming from the interior of the
cooking stove, so that not only is the heat of the escaping air utilized directly for
heating the vessels placed over the said burners but also for effecting the complete
combustion of the regeneratively, heated gas at said burners. at. the same time that
the vapours.issuing from within the stove are deprived by contact. with the external
flames, of all odour of cooking.
The invention will be described with reference to the accompanying drawings
forming part of this Specification wherein Figures 1 and 2 are elevations in vertical
section on planes at right angles to one another, Figure 3 is a horizontal section of
the lower part of the stove, and Figure 4 is a top plan.
The stove comprises an outer casing A of rectangular or other form, containing
lower and upper roasting spaces BB surmounted by an oven C; access being had
to the interior of these compartments by doors E and F (Figure 2).. Within the
casing, along the sides and back of the chamber B, is an air heating chamber H
traversed by vertical heat-radiating flues G, beneath which are burners, upon a
gas pipe I which connects with a regenerative gas heating chamber J formed by
a vertical pipe, contained in one of the flues G. The products of combustion from
the burners ascend through the flues G to the upper roasting space B' whence
the hot air and gases pass through holes in the bottom plate D of the oven C the
draught and ventilation being regulated by a hit-and-miss dainper L,' a' baffle L'
directing the hot air and gases upwards towards the top plate c of the oven, through
which plate they escape by apertures M. The heated air thus issuing from the
apertures M is utilized for effecting the complete combustion of gas jets arranged
preferably in the form of ring burners N above and around said apertures so as to
heat kettles or other cooking utensils which may be placed over the ring burners as
shown at Q. These burners N are supplied with heated gas from the gas heater J
above described, through pipes j which are led upwards as far as possible inside
the stove so as to maintain the heat of the gas, the pipes j passing out through the
side of the casing A at the upper part thereof and being there provided with stop-
cocks to control the supply of gas to the ring burners N and with supporting
sockets in which the arms carrying the ring burners N are pivoted so as to
be capable of being swung entirely aside when not required for use.
C
The stands n upon which kettles or other cooking vessels may be supported
above the burners N consist of casings, circular or otherwise shaped in plan to
correspond with the form of the ring burners and adapted to rest upon the top
plate of the stove and to enclose the apertures M and burners N so as to confine
the hot air issuing from within the stove and cause the same to come into intimate
contact with the flames from the ring burners. The perfect combustion of the gas
in these flames is thus ensured, whilst any vapours discharged from the stove are
simultaneously deodorized by contact with the flames. Lateral openings are pro-
vided in the upper part of the casings for the escape of the products of com-
bustion from the burners N and from within the stove, and the casings are made
removable to admit of swinging the burners N entirely aside so as, when required,
to leave the whole surface of the oven top unencumbered and available as a hot
plate, in which case the stove would be surmounted by a removable grating 0.
provided with upstanding sides 01 to prevent articles placed on the grating from
falling off. The space thus enclosed may be made to form a removable oven by
enclosing the top of the combing 01 with an apertured covering plate and providing

page_text: a door in the front side, whilst a series of such removable ovens may be superposed
upon the first, according to requirements.
Instead of, or in addition to, lagging the sides of the casing of the stove it may
be water-jacketted or otherwise constructed so as to provide a water heater for the
supply of hot water for general purposes.
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 :-
The combination with a gas cooking stove having hot air outlets in the top, of
burners carried by swinging brackets pivoted beyond the sides of the stove so as to
admit of being swung over the hot air outlets or swung clear of the stove top,
the burners being supplied with gas by pipes led through the interior of the stove
from a regenerative gas heater, and of removable supports for cooking utensils,
adapted to enclose the outlet apertures and burners so that the combustion of the
heated gas supplied to the burners will be effected by the heated air coming from
within the stove substantially as specified.
Dated this 25th day of January 1808
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.