Improvements in Electrical Heating Apparatus.
Year: 1895

page_text: Date of Application, 12th July, 1895
'Complete Specification Left, 1st Apr., 1896-Accepted, 23rd May, 1896
Improvements in Electrical Heating Apparatus.
I OCTAVIUS MARCH, of 70 Sinclair Road, Kensington, in the County of London,
Electrical Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention for improvements in electrical heating apparatus has for its object
to provide a ready and efficient means for heating by an electric current liquids
contained in a suitable receptacle and consists essentially in providing an electric
heater that can be inserted into the liquid in the receptacle to heat it and that can
be easily cleaned.
An electric heater suitable for insertion in a receptacle such as a glass tumbler or
the like consists of a head piece to which are attached several metallic tubes. A
suitable insulated electric resistance is inserted in each tube and the resistances are
joined up at the head and connected to leading in conductors. A suitable handle
may be attached to the head and the leading in conductors may pass down the
hollow handle.
On passing the electric current into the apparatus the tubes are heated up and
heat the liquid in the receptacle.
The tubes may project upwards or downwards from the head.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.
Improvements in Electrical Heating Apparatus.
I OCTAVIUS MARCH, of 70 Sinclair Road, Kensington, in the County of London,
Electrical Engineer, 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 for improvements in electrical heating apparatus has for its object
to provide a ready and efficient means for heating by an electric current liquids
contained in a suitable receptacle and consists essentially in providing an electric
heater that can be inserted into the liquid in the receptacle to heat it and that can
be easily cleaned.
An electric. heater suitable for insertion in a receptacle such as a glass tumbler or
the like consists of a head piece to which are attached several metallic tubes. A
suitable insulated electric resistance is inserted in each tube and the resistances are
joined up at the head and connected to leading in conductors. A suitable handle
may be attached to the head and the leading in conductors may pass down the
hollow handle.
On passing the electric current into the apparatus the tubes are heated up and
heat the liquid in the receptacle.
The tubes may project upwards or downwards from the head.

page_text: In the accompanying sheet of illustrative drawings:
Fig. 1 is a vertical section showing an electric heater constructed according to
this invention inserted in a glass tumbler and Fig. 2 is a plan of the same.
Fig. 3 is an elevation of an electric heater showing a different arrangement of
heating tubes and Fig. 4 is a plan of the same.
Fig. 5 is a detail view of the electric heater to an enlarged scale.
The electric heater consists of a head piece a to which are attached a number of
metallic tubes b. An insulated electric resistance c is inserted in each tube b and
the resistances are joined up by the wires d and connected to the wires e passing
up through the handle and thence to any convenient source of electricity.
The electric heater is placed in the liquid receptacle as shown in Figs.
and on passing the electric current into the apparatus the metallic tubes 6 are heated
up and heat the liquid in the receptacle.
and 2
As shown in Figs. 1 and 2 the metallic tubes & containing the resistances c project
downwards from the head piece a. In Figs. 3 and 4 the head piece a is lowermost
the metallic tubes 6 being arranged to project upwards. The wires e pass down the
central standard g and are connected to the wires d. In this case all openings for
the passage of the wires must be sealed as the head piece a is below the surface of
the liquid to be heated.
An electric heater constructed according to this invention provides a ready means
for heating liquid contained in a receptacle, and it can be easily cleaned after use.
The resistance c (shown in detail in Fig. 5) consists of a central wire h insulated
by spiral windings i of asbestos and of an outer spiral wire surrounding the
central wire and also insulated by spiral windings m of asbestos. The inner ends of
the wires and are connected together and the outer ends pass through the plug n
secured upon the head piece a and are connected to the wires d. The metal
The
tubes fit upon the plugs n and their outer ends are closed by the plugs o.
resistance can thus be readily got at for repairs.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. An electrical heating apparatus consisting of closed metallic tubes heated by
internal electrical resistances and adapted to be placed in a liquid receptacle to heat
the contained liquid.
2. An electrical heating apparatus consisting of closed metallic tubes secured upon
a suitable head piece, electric resistances placed within said metallic tubes and of
conductors connected to the said resistances the whole being arranged to be placed
in a liquid receptacle to heat the contained liquid.
3. An electrical heating apparatus substantially as described with reference to the
drawings.
Dated this 31st day of March 1896.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.