CERTAIN IMPROVEMENTS IN APPARATUS FOR HEATING ASPHALTUM AND OTHER MATERIALS
Year: 1884

page_text: I ALEXANDER HENRY REED, of 90 Cannon Street, London, in the County of
Middlesex, Engineer, do hereby declare the nature of the Invention for CERTAIN
IMPROVEMENTS IN APPARATUS FOR HEATING ASPHALTUM AND OTHER MATERIALS,
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 certain improvements in apparatus for heating
materials such, for instance as asphaltum or resin, which, when placed in a vessel,
the bottom of which is exposed to the direct action of a fire, are liable to form a
hard scale upon the inner surface of the bottom of the heating vessel, whereby the
effect of the fire is to a great extent destroyed, and the bottom of the vessel is
liable to burn out in a short time.
The peculiar nature of the Invention is pointed out in the following Specification
and Claims, and illustrated in the accompanying Drawing, in which
Fig. 1, represents a vertical central section of the apparatus.
Fig. 2 is a plan or top view.
Fig. 3 is an inverted plan of the heating vessel detached.
Similar letters indicate corresponding parts.
In this Drawing, the letter A designates the heating vessel which is composed of
a metallic jacket a, open at both ends, and of a bottom b made of fire clay or
equivalent refractory material. The bottom is supported upon angle irons c which
are rivetted or otherwise firmly secured to the bottom edge of the jacket. In the
example represented in the Drawings, four such angle irons are shown, but the
number may be increased or a continuous inwardly projecting flange may be
formed on the lower edge of the jacket to form the support of the botton b. After
the bottom has been adjusted upon its supports, the space which may exist between
its circumference and the inner surface of the jacket is filled up with fire clay to
prevent leakage.

page_text: With the refractory bottom b is combined a secondary bottom & consisting of a
disk of sheet metal, which is placed loosely into the jacket a. To the jacket at or
near its top edge are firmly secured a series of angle irons c which support the
heating vessel in the furnace B. This furnace is of a well known construction, and
it will be readily seen by inspecting Fig. 1, that the fire grate f is so situated, that
the bottom of the heating vessel is exposed to the direct action of the fire.
In heating certain materials, such for instance as asphaltum, a very high heat is
required, and for that reason it is desirable that the bottom of the heating vessel shall
be exposed to the direct action of the fire, but if the heating vessel is constructed
entirely of metal as heretofore practised, the asphaltum readily adheres to the inner
surface of the bottom and the heating vessel soon burns out. This disadvantage is
obviated by this Invention, and if it is taken into consideration that one of the
heating vessels as at present used for heating asphaltum costs from £12, to £16, the
great value of the Invention will be readily understood.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed, I declare that what
I claim is:
1. The combination substantially as herein before described, with a metallic
jacket open at both ends, of a bottom made of fire clay and supports for the bottom,
substantially such as herein described.
2. The combination substantially as herein described, with a metallic jacket open
at both ends, of a bottom made of fire clay, supports for the bottom substantially
such as herein described, and a metallic plate placed upon the bottom.
3. The combination, substantially as hereinbefore described, with a metallic
jacket open at both ends, of a bottom of fireclay placed into the jacket, and a
fireplace beneath the clay bottom.