Year: 1886

page_text: We, THOMAS FLETCHER and ALFRED CLARE both of Thynne Street. Warington in
the County of Lancaster, Gas Apparatus Manufacturers, 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:-
As ordinarily constructed the products of combustion from the burners of gas fires
and stoves pass more or less directly away at a comparatively high temperature and
their heat is consequently wasted so far as any useful heating effect is concerned. We
are of course aware that in specially constructed gas heating apparatus, efforts have
from time to time been made to utilize the waste heat and that the exit flue has been
employed as a radiating or heating surface, but we are not aware that any arrange-
ment of the particular kind hereinafter described has been adapted to or combined
with gas fires and stoves of the ordinary types or of a character similar thereto. The
nearest approach within our knowledge to the arrangement which is the subject of the
present invention and which is hereinafter described is one in which vertical air
heating tubes are employed above the gis burners.
The objects of this invention are, to increase the efficiency of gas fires and gas
stoves and to ensure a more equable distribution of warm air therefrom in to the lower
part of the room.
These improvements consist in the adaption to or the combination with gas fires
and gas stoves of the existing or similar types of construction, of two or more inclined
tubes contained within a chamber and so arranged or disposed that the ends of the
tubes are open to the atmosphere while the tubes themselves are contained within the
chamber which is placed or constructed above the stove or fire and through which
By this means the walls of the
the products of combustion are constrained to pass.
tubes become heated by the products of combustion and the air contained within the
tubes consequently becomes heated also. According to known natural laws the heated
air ascends to the upper ends of the inclined tubes whence it escapes to the outer
atmosphere to which its warmth is imparted. The place of the escaping warm air is
taken by cold air entering the lower open ends of the tubes and this in its turn absorbs
heat from the tubes and thus a constant supply or current of warm air issues from the
higher ends of the tubes so long as the gas is being burnt in the fire or stove. By

page_text: the hereinbefore described adaptation or arrangement the uprush of a compact volume
of warm air such as occurs when vertical heating tubes are employed is obviated, and
the consequent accumulation of warm air in the upper part of the room and resulting
loss of useful heating effect are avoided.
We desire it to be understood that except as hereinbefore described and as herein-
after specifically claimed we do not consider ourselves entitled to the exclusive use of
externally heated tubes in gas fires and gas stoves for originating a current of warm
air inasmuch as such tubes have already been employed vertically in a chamber above
the burners and in other analogous arrangements or combinations.
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:
The adaptation to or combination with gas fires and gas stoves of the existing
and similar types of construction, of two or more inclined tubes contained within a
chamber or space above the gas burners; substantially as and for the purpose herein-
before set forth and described.
WILLIAM E. HEYS,
Agent for the Applicants,