Improvements in Furnaces for Use with Light Hydrocarbons as Fuel.
Year: 1897

page_text: Date of Application, 9th Apr., 1897-Accepted, 29th May, 1897
DE BUITIGATION.
Improvements in Furnaces for Use with Light Hydrocarbons
as Fuel.
We, THOMAS FLETCHER and FLETCHER, RUSSELL & Co. LIMITED, both of
Thynne Street Warrington in the County of Lancaster, Manufacturers of Gas
Apparatus, 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 :-
This invention relates to an improved construction and arrangement of furnace
in which the heat is derived from the combustion of the vapour of a light hydro-
carbon such as benzoline or gasoline mixed with air.
A furnace constructed according to our present improvements is circular in plan,
with any suitable centrally perforated cover. In the centre of the furnace bottom
there is arranged a movable or permanent circular wall or a flat bottomed, open
topped, cylindrical container which also may be permanent or removable. Between
the circular wall or cylindrical container and the body of the furnace, there is an
annular passage; and between the upper edge of the circular wall or cylindrical
container, there is a space through which the inflamed mixture can pass to the
opening in the cover. The burner is arranged to inject its flame through an opening
in the furnace casing at a tangent to the annular passage.
We will more particularly describe our said invention with reference to the
accompanying drawings which represent the form of furnace constructed according
to our present improvements, which is more generally useful.
Figure represents a sectional plan with the cover removed, and Figure 2, a
vertical cross section with the cover in place.
F, indicates the furnace body or casing; C, the perforated cover; B, the front
end of the burner; and A, a central container having a cylindrical wall. P, shews
the annular passage constituted between the wall W, and the furnace body; I, the
injection nozzle at a tangent thereto; and O, the escape opening through the
cover.
The whole furnace is constructed of a suitable refractory material and may be in
two or three parts as may be more convenient. If of two parts only, the cylindrical
wall forms part of the body of the furnace which however is less convenient and
economical in practice than to form it separately, so that it may be more readily
renewed. If of three parts, these are:- -The furnace body or casing; the cover;
and the cylindrical wall W, which in this case would be usually provided with a
closed bottom so as to form a container for the work to be operated on by the heat,
as shewn by Figure 2.
A furnace constructed as hereinbefore described is especially adapted for
enamelling or fusing enamels and for dentists' use without the necessity for a muffle
or other protector than the wall W, from the flame. It may be used with any
substitute for the hereinbefore described cylindrical wall or container, provided
always that an annular passage next to the wall of the furnace is provided or
constituted, into which passage the flame of the burner injected tangentially.
The cover illustrated by the drawing is similar to that commonly used at present
with injector furnaces of a similar type.

page_text: 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:-
A furnace for use with vapour of volatile hydrocarbons, having an annular
passage into which the flame can be injected tangentially, said furnace being
adapted for use in fusing enamels and the like without a muffle or other protector,
and constructed and arranged substantially as herein before described with reference
to the accompanying drawings.
W. E. HEYS & SON,
Agents for the Applicants.