A New and Improved Air Heater.
Year: 1898

page_text: Date of Application, 25th Aug., 1898
Complete Specification Left, 25th May, 1899-Accepted, 12th Aug., 1899
A New and Improved Air Heater.
I, ARTHUR EDWIN GREVILLE, of 2, Staple Inn, Holborn, in the County of
London, Gentleman, do hereby declare the nature of this invention to be as
follows:-
This invention relates to an air heater by means of which air may be heated
electrically and distributed so as to rapidly warm any chamber or apartment.
The invention consists of an apparatus in which resistance wires are employed
which are heated by the passage therethrough of an electric current, while a
fan is employed drawing the air through such apparatus. By such means a
chamber or apartment is rapidly heated and the atmosphere is in no way vitiated
by noxious products such as result in the employment of heating stoves in which
solid or liquid fuel is used.
In carrying the invention into effect in accordance with one modification a
receptacle is provided which may be made of copper or other metal or material
into which a series of frames are inserted which are provided with insulating
These frames
rings or buttons about which resistance wire is wound in series.
are arranged upon the sides of and across the receptacle so that the resistance
wires may be placed in the path of the air which is caused to pass through the
receptacle by means of a fan or propellor arranged upon one side of the recep-
tacle in bearings provided for the purpose. Any number of resistance frames
may be employed which may be disposed as desired and their terminals connected
Insulators or
to binding screws provided upon the exterior of the receptacle.
distance pieces may be provided upon the sides of each frame to separate one
from the other or for the purpose of holding each in position within the
receptacle.
The fan or propellor may be arranged within the receptacle or preferably upon
the side thereof, the wall of the receptacle being shaped to receive the propellor,
It is
while the propellor may be mounted in bearings upon the receptacle.
preferred to propel the fan by means of electric current taken from a suitable
source, though the fan may be propelled by any other suitable means. Further,
the fan may, for instance, be propelled by the influx of air.
According to another modification the receptacle for the reception of the
resistance frames may be of cylindrical or conical form, in which case the
resistance frames are of corresponding circular shape, the fan being mounted
at the extremity of the cylindrical or conical casing. The casing may be built
in two semi-cylindrical or semi-conical parts and the one secured to the other
by any suitable means so that thereby the resistance frames may be conveniently
introduced into position, or the resistance wire may be mounted upon one frame
which may be inserted as a whole within the interior of the cylindrical conical
or other shaped casing.
An apparatus provided in accordance with this invention while having its most
important use in the warming of chambers or apartments may also be used for

page_text: producing perspiration by heating the air to such a degree that this may be
effected.
Dated this 25th day of August 1898
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents,
ARTHUR EDWIN GREVILLE, of 2, Staple Inn, Holborn, in the County of London,
Gentleman, 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 air heater by means of which air may be heated
electrically and distributed so as to rapidly warin any chamber or apartment.
The invention consists of an apparatus in which resistance wires are employed,
which are heated by the passage therethrough of an electric current, while a
fan is employed drawing the air through such an apparatus. By such means a
chamber or apartment is rapidly heated and the atmosphere is in no way vitiated
by noxious products such as result in the employment of heating stoves in which
solid or liquid fuel is used.
The invention is illustrated in the accompanying drawings, in which,
Figures 1 and 2 are respectively longitudinal and transverse sectional
elevations of a heater constructed according to one modification, while,
Figures 3 and 4 are respectively sectional elevation and plan of a heater
according to a second modification.
In carrying the invention into effect in accordance with one modification as
illustrated in Figures 1 and 2 a horizontal receptacle A is provided which may
be made of copper or other metal or material into which a series of frames B
are inserted, which are provided with insulating rings or buttons C about which
resistance wire D is wound. These frames B are arranged upon the sides of
and across the receptacle A so that the resistance wires D may be placed in
the path of the air which is caused to pass through the receptacle by means of
a fan or propeller E arranged upon one side of the receptacle in bearings
provided for the purpose. A perforated screen I may be provided at the air
inlet to intercept any small particles of matter which might be carried in by
the air current. Any number of resistance frames may be employed which
may be disposed as desired and their terminals connected to binding screws F
provided upon the exterior of the receptacle. The electric current may be in
series or parallel on the frames. Insulators or distance pieces G may be
provided upon the sides of each frame to separate one from the other, or for the
purpose of holding each in position within the receptacle.
The fan or propeller is preferably arranged within the receptacle and upon
the end thereof as shown, the wall of the receptacle being shaped to receive it
It is preferred to propel the fan by a small motor such as H driven by means of
electric current taken from a suitable source, though the fan may be propelled
by any other suitable means. Further, the fan may, for instance, be propelled
by the influx of air.
In the modification illustrated in Figures 3 and 4 the receptacle A is arranged
vertically having an air inlet at the bottom and a fan or propeller at the top.

page_text: The wire frames are arranged horizontally, and all the parts are similarly lettered
to the corresponding parts of the modification illustrated in Figures 1 and 2.
It is to be understood that the receptacle for the reception of the resistance
frames may be of cylindrical or conical form, instead of retangular form as
illustrated, in which case the resistance frames are of corresponding circular
shape, the fan being mounted at the extremity or top of the cylindrical or conical
casing according to circumstances. The casing may be built in two semi-
cylindrical or semi-conical parts and the one secured to the other by any suit-
able means, so that thereby the resistance frames may be conveniently introduced
into position, or the resistance wire may be mounted upon one frame which
may be inserted as a whole within the interior of the cylindrical, conical or
other shaped casing.
An apparatus provided in accordance with this invention, while having its
most important use in the warming of chambers or apartments, may also be
used for producing perspiration by heating the air to such a degree that this
may be effected.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
-
1. An electrical heating apparatus comprising a receptacle containing a series
of frames carrying resistance wires heated by an electric current, and means
for inducing a current of air to pass through the apparatus in contact with the
heated resistance wires constructed as and for the purpose herein before described
and set forth.
2. The electrical heating apparatus herein before described with reference to
Figures 1 and 2 of the accompanying drawings.
3. The electrical heating apparatus hereinbefore described with reference to
Figures 3 and 4 of the accompanying drawings.
Dated this 25th day of May 1800
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents.