or for Analogous Purposes.
Year: 1886

page_text: or for Analogous Purposes.
I, JOHN ROBINSON CROSTHWAITE, of South Stockton in the County of York,
Ironfounder, 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 following statement:-
My Invention has for its object to increase the efficiency and economy of fuel in
domestic fire-places or stoves and consists in providing means as hereinafter
described for intercepting and utilizing as much as possible the heat generated
which in stoves of the ordinary construction escapes with the products of combustion
up the chimney.
In carrying my invention into effect I provide at the upper part of the stove an
air chamber or box which is made to project over the fuel basket so that the heat
from the fire which would otherwise escape up the chimney is caused to impinge on
the under side of the chamber, which thus becomes highly heated so that air passing
through or contained in the box or chamber is raised in temperature and may be
employed for increasing the temperature of the apartment in which the stove is
situated, or be otherwise employed.
A current of fresh air through the heating box or chamber may be maintained
by means of circulating passages communicating therewith from the room con-
taining the stove or from any other suitable source outside the room..
And in order that my Invention may be fully understood I will describe the
same with reference to the accompanying drawings Figure 1 of which is a front
elevation of a stove fitted with a heating chamber above the fire place, according
to my invention figure 2 is a part plan and part horizontal section on the line xx
of Figure 1. Figure 3 is a vertical section taken on line y y Figure 1 and
Figure 4 is a similar section illustrating a modification. A is the box or heating
chamber projecting from the back B of the stove over the fuel basket C at an angle
suitable to cause the heat of the fire to impinge on the under side of the said
chamber instead of passing direct up the chimney as is the case in ordinary stoves.
The under side or heating surface of the chamber A may be flat as shewn in my
drawings or it may be curved corrugated or ridged if desired so as to present more
heating surface to the air contained in, or passing through the chamber A.
Passages D D forming communication between the chamber A and the room

page_text: containing the stove, maintain a current of fresh air through the heating chamber,
these passages may be arranged as shewn in Figures 1 2 & 3, the passages D
consisting of pipes extending downwards from the chamber into the room and
acting as inlets for cool air; similar passages or pipes D¹ extending upwards from
the chamber A into the room and serveing to conduct the heated air from the
chamber A into the room or apartment containing the stove as indicated by the
arrows. Instead of the heating chamber A being supplied with fresh air from
the room as described fresh air may be supplied to the heating chamber A from
outside of the room as shewn in Figure 4 by one or more inlet pipes D extending
in any suitable direction from the stove to the outer air. In Figure 4 the said pipe
is shewn as extending through the back of the stove to the outside air.
My Invention may be applied to stoves generally where a portion of the heat
would otherwise escape up the chimney with the ascending products of combustion,
whether the heat be generated by a coal fire or the combustion of gas, but to
compensate for intercepting the direct passage to the chimney as hereinbefore
described especially when the beating chamber is made to project well forward,
I prefer to facilitate the ascent of the products of combustion up the chimney by
means of a hood or canopy over hanging the fire in the usual manner.
Having now particularly described and ascertained the nature of my invention
and in what manner the same may be carried into effect what I claim is
In domestic stoves or fire places the employment of a chamber over the fuel
basket in combination with passages for conducting air to and from the chamber
substantially as and for the purpose herein before described with reference_to_the
accompanying drawings.
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