IMPROVEMENTS IN GAS AND OTHER STOVES
Year: 1876

page_text: LETTERS PATENT to Peter Lawrence, of Blackfriars Road, in the County of
Surrey, for the Invention of "IMPROVEMENTS IN GAS AND OTHER STOVES."
the 16th September 1876, and dated the 24th March 1876.
PROVISIONAL SPECIFICATION left by the said Peter Lawrence at the Office
of the Commissioners of Patents on the 24th March 1876.
PETER LAWRENCE, of Blackfriars Road, in the County of Surrey. "IMPROVEMENTS
IN GAS AND OTHER STOVES."
This Invention relates to improvements in the arrangement and construction of
gas and other stoves, whereby the heat generated by the combustion of gas, oil,
spirit, fuel, or other heat generating means in the combustion chamber is caused to
circulate in a series of chambers, so as to absorb and transmit the heat to the room
or chamber in which the stove is situated, the combustion chamber being so arranged
as to apply the heat generated therein for cooking and other purposes if required.
For this purpose above the combustion chamber an oven is arranged if required,
but if the stove is simply required for warming and ventilating purposes only
then the oven may be dispensed with.
Over the outlet from the oven or from the combustion chamber, as the case may
be, a cover or cap of cylindrical or other suitable form is placed which receives the
heat from the chamber below, and over this cap or cover a series of two or more
other caps or covers are placed or arranged, a comparatively narrow space being
left between each of such caps or covers, so that the heat can circulate between each
of such caps or covers by passing through suitable inlet and outlet passages formed
through them, the heat and products of combustion finally escaping by an outlet in
the top of the outer cap or cover into the room or chamber to be heated, or by a
pipe or flue into a chimney if desired.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Peter Lawrence in the Great Seal Patent Office on the 23rd September
1870.
PETER LAWRENCE, of Blackfriars Road, in the County of Surrey. "IMPROVE-
MENTS IN GAS AND OTHER STOVES."
This Invention relates to improvements in the arrangement and construction of
gas and other stoves, whereby the heat generated by the combustion of gas, oil,
[Price Gd.]

page_text: spirit, fuel, or other heat generating means in the combustion chamber is caused to
circulate in a series of chambers, so as to absorb and transmit the heat to the room
or chamber in which the stove is situated, the combustion chamber being so arranged
as to apply the heat generated therein for cooking and other purposes if required.
For this purpose above the combustion chamber an oven is arranged if required,
but if the stove is simply required for warming and ventilating purposes only then
the oven may be dispensed with.
Over the outlet from the oven or from the combustion chamber, as the case may
bc, a cover or cap of cylindrical or other suitable form is placed, which receives the
heat from the chamber below, and over this cap or cover a series of two or more
other caps or covers are placed or arranged, a comparatively narrow space being left
between each of such caps or covers, so that the heat can circulate between each of
such caps or covers by passing through suitable inlet and outlet passages formed
through them, the heat and products of combustion finally escaping by an outlet in
the top of the outer cap or cover into the room or chamber to be heated, or by a
pipe or flue into a chimney if desired.
And in order that my Invention may be clearly understood and readily carried
into practice I will proceed to describe the Drawings hereunto annexed.
DESCRIPTION OF DRAWINGS.
Figure 1 shows a front elevation; Figure 2 a side view; Figure 3 a vertical
section Figure 4 a plan with the covers removed; Figures 5, 6, 7, 8, and 9 show
somo of the parts separately.
is the combustion chamber, and b is an oven or chamber above it, the back and
sides being formed hollow, so that the gases and heated vapours from the gas burner
a or fire placed underneath the chamber or oven b may circulate. In the chamber
or oven ba kettle or saucepan may be placed upon or inserted in openings in the
plate for heating water, cooking, or other purposes. A small valve or opening c
is arranged in the top of the chamber b to allow any steam formed in the interior of
the oven or chamber to escape therefrom. The heat from the gas burner a¹ or fire
after circulating around the chamber b passes up the pipe or tube d and over the
top, then passes down the annular space formed by the cover e, and through the
holes or perforations e¹ at the bottom, passes up the annular space formed by the
cover, thence passing through the holes or perforations f¹ at the top, and down
the annular space formed by the cover g through the holes g¹ into the annular space
formed by the outside cover h, from whence the products of combustion and gases.
escape through the pipe or tube h¹ into the chimney.
The number and shape of the covers or hoods employed for causing the heat and
gases to circulate (and which absorb and thus retard the escape of the heated gases)
may be greatly varied without departing from the true principle on which my
improvements depend.
When the chamber b is to be used as an oven only I find it advantageous to form
the fire or combustion chamber on one side, as shown at Figure 10, an opening being
made in the top of such combustion chamber for receiving the bottom part of a
kettle, saucepan, or other cooking utensil. The annular or other shaped chambers
in which the heat and gases circulate before they escape to the chimney may be
arranged horizontally or in other positions at the back or side of the combustion
chamber b for convenience or otherwise if desired. Air spaces may also be arranged
in combination with the heat circulating chambers for warming atmospheric air
admitted through the stove to the room in which it is placed.
Having thus described the nature of my Invention, and the manner of performing
or carrying the same into practice, I would have it understood that I do not limit
myself to the exact details herein-before described, as the same may be considerably
varied without departing from the essential character of my Invention. But what
I claim is-
The improved arrangement and construction of gas and other stoves having a
series of annular or other shaped chambers combined therewith, through which the

page_text: heat and gases circulate before they escape to the chimney, substantially in the
manner and for the purposes herein-before described and represented in the Drawings
hereunto annexed.
In witness whereof, I, the said Peter Lawrence, have hereunto set my hand
and seal, this Twenty-second day of September, in the year of our Lord
One thousand eight hundred and seventy-six.
Witness,
J. G. TONGUE,
Patent Agent,
34, Southampton Buildings,
Chancery Lane, W.C.
P. LAWRENCE. (L.S.)