Improvements in Electric Heating Apparatus.
Year: 1891

page_text: Date of Application, 31st Mar., 1891-Accepted, 16th May, 1891
COMPLETE SPECIFICATION.
Improvements in Electric Heating Apparatus.
I, MARK WESLEY DEWEY, of 150 North Salina Street in the City of
Syracuse, in the County of Onondaga, in the State of New York, United States of
America, Electrician, do hereby declare the nature of my invention for
IMPROVEMENTS IN ELECTRIC HEATING APPARATUS," and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
My invention relates to electric heating apparatus, and the object is, to rapidly
radiate or diffuse the heat from the heat-leveloping electric conductors or
resistances so that the apparatus may be able to supply more heat, and the heat
distributed evenly throughout the apartment or room in which the apparatus is
located.
To accomplish this, my invention, effectively, I combine an electric heater
with a suitable ventilating fan operated by a motor of any desired construction,
but preferably an electric motor to displace or remove the heated air from the
heater.
In order to carry out my invention, I preferably mount exposed heat-
developing electric conductors or resistances upon the blades of a ventilating fan,
or, construct the blades of a fan of an electric heat-developing conductor as
hereinafter fully described and specifically set forth in the claims.
Referring to the drawings,
Fig. 1 is a side view of a combined electric heater and ventilating fan suspended
from the ceiling.
Figure 2 is a diagram of electric circuits when a source of alternating current is
employed and a portion of the current is transformed into a heating current.
Figure 3 is a side view of a portion of another fan having a pulsator to break up
the current and operated by the electric motor running the fan, when a source of
direct current is transformed for the heater.
Figures 4, 5 and 6 are different forms of fan-blades that may be employed, and
Figs. 7 and 8 represent inodifications of apparatus for carrying out my
invention.
Like letters of reference indicate corresponding parts.
Specifically referring to said drawings A is the frame fixed to the ceiling B and
supporting the shaft C from which the blades D D are extended, and a small
electric motor E to rotate the said shaft and blades.
I do not limit myself to the employment of an electric motor or to the employ-
ment of a separate motor for each fan as any suitable motor may be employed,
and arranged to operate several fans, if desired, in the usual and well known
manner.
a and a are electric conductors which may extend from any suitable source of
electricity to the terminals band of the motor E and a" is an adjustable
resistance in the conductor a to control the current.
cand are the conductors of a branch circuit connecting the conductors a
and a to the terminals d and d', and c" is an adjustable resistance and circuit maker
and breaker in the conductor d to control the current flowing to the heater F
mounted upon the blade or blades D of the fan.
Instead of connecting the conductor c to the conductor a between the terminal
and the adjustable resistance a' said conductor may be connected as shown by the
dotted line c*.
The heater F shown in Figure 1 is formed of a serpentinely shaped wire c
suitable metal fixed by pins to the sides of the blades formed preferably of

page_text: In order to convey the electricity from the stationary terminals d and d to the
rotary heater or blades of the fan I fix two insulated metallic rings e and e¹ upon
the shaft C between said terminals so that they will revolve with the shaft, and
extend metallic fingers or brushes and from the said terminals to the rings to
bear with their free ends upon the peripheries thereof-brush i bearing upon ring e
and upon ring e¹. From these rings electric conductors g and g' extend to the
blades D D.
If heat is not desired, the circuit to the heater F may be opened by means
of the circuit breaker c¹ and the fan may be rotated without supplying heat.
When the source of electricity is of an alternating character an alternating
current motor may be employed, and, if it is desired to transform the current for
the heater into a current of greater volume an inductional transformer T may be
connected in circuit as shown in Fig. 2, and the terininals s and s¹ of its secondary
circuit connected to the heater F through the terminals & and d and brushes,
rings, etc.
In this case the terminals and should be led to the terminals of the alternating
current motor.
Should the source of electricity be direct, and it is desired to transform a portion
of it for the heater, the same may be done by placing a pulsator G preferably of
the alternating type, as shown, in circuit with the transformer T as shown in
Figure 3 of the drawings. The said alternator is placed upon but insulated from
the shaft C of the fan, and is rotated with the latter. The current is led to and
from the alternator by means of metallic brushes h h and h¹¹ fixed to, but insulated
from the frame A and bearing with their free ends upon the periphery of said
alternator.
Conductors extend from the brushes to the inductional transformer T also
supported by the frame A, and the terminals ss of the secondary circuit are
connected to the brushes i and through the parts of the frame supporting said
brushes and transformer and thence to the heating conductor F through the
brushes and, rings e and e¹ and conductors g and gas before described.
Figure 4 shows a side and edge view of a heat developing electric conductor F
consisting of a broad thin strip of metal as iron or copper, formed around and
on both sides of a blade of insulating material D. This strip of metal is of uniform
width and thickness throughout, and therefore, is not as wide as the widest end of
the blade D.
If it is desired to have the heating conductor correspond in width to that of
the blade, it may be done, and the resistance kept uniform throughout. its
length, by tapering the metal strip toward its middle or widest part as shown
in Figure 5 this form of heating conductor will afford a greater radiating
surface.
In some cases, I prefer, however, to perforate or construct the blades of wire
netting upon an insulated frame as shown in Figure 6, so that there will be less
displacement of air in the apartment when the fan is rotated, "but this may be
effected also my setting the fan blades differently in their sockets or turning them
so that there will be less air resistance when they are rotated.
Instead of suspending the fan from the ceiling, it may stand upon the floor
or be fixed to the side wall of the room as desired.
I do not limit myself to a fan, as the purpose of the invention may be accomplished
by various other means, as for instance, a rotating disk having the heat-developing
electric conductor F mounted upon it as shown in Figure 7. D represents
preferably a disk of insulating material to be rotated by the shaft C and is the
heat-developing conductor mounted upon the disk.
Neither do limit myself to an apparatus that moves the heating conductor, as
the latter may be held stationary in proximity to a fan or apparatus for displacing
the air as shown in Figure 8 of the drawing,
In the last figure D represents a disk having a heating electric conductor mounted
upon it as shown in Fig. 7, and supported by the frame A of a fan and above the

page_text: fan blades, so that the heat developed by the conductor F will be rapidly diffused
or carried from said conductor when the fan is moved or rotated.
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
claim is :-
1 The combination of an exposed electric heater and a ventilating fan mounted
upon the same support or frame.
2-The combination of a ventilating fan and an electric heater mounted upon
and carried by said fan.
3-The combination of an electric heater and a motor connected therewith to
move the same.
4-The combination of an electrically heated conductor and a blade of a
ventilating fan to carry said conductor.
5-The combination with a ventilating fan and a motor to operate the same, of
an electrically heated conductor mounted upon the blades of said fan.
6-The combination with a rotary ventilating fan and a motor to operate the same,
of an electrically heated conductor mounted upon said fan.
7-In an electric heating apparatus, one or more exposed heat developing electric
conductors suitably supported to be moved, and a motor connected to said conductors
to move the same.
-
8 In an electric heating apparatus, one or more heat-developing electric con-
ductors suitably supported to be rotated and connected in circuit with a source of
electricity, and a motor connected to and arranged to rotate said conductors, for the
purpose described.
9 The combination of a perforated or open-work fan blade a heating conductor,
and an electric conductor connected with the same.
10 The combination of a fan blade constructed of perforated or open-work
electric conducting material, and electric conductors connecting said blade with a
suitable source of electricity.
11 The combination with a ventilating fan, a motor to operate the same, and an
electric heater mounted thereon, of an inductional transformer, a secondary
circuit connected with the heater, a pulsator in the primary circuit operated
by the motor operating the fan, and a source of direct current for the primary
circuit.
12 The combination with a ventilating fan, a motor to operate the same, and
an electric heater mounted thereon, of an inductional transformer, a secondary
circuit of said transformer connected with the heater, and a source of electricity for
Pary circuit.
13-In an electric heating apparatus, one or more heat-developing electric con-
ductors and a movable means to displace or remove the heated air from said
conductor or conductors.
14-In an electric heating apparatus, one or more exposed heat-developing
electric conductors, means to displace or remove the heated air from said conductor
or conductors, and means for controlling the current passing through said conductor
or conductors, and the removal of air therefrom independently of each other.
15 The combination of an electric heater, an electric motor supplied with
means for removing the heat from said heater, and electric conductors connected to
both the heater and motor to supply electricity thereto.
AL 1
ML1 1001
MARK WESLEY DEWEY.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, Agents for the Applicant.