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Патент USA US2405783

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ELECTRIC HEATER
Filed Feb. 27, 1943
_
’3‘Sheets—Sheet 1
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INVE'ZNTOR.
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ATTORNEYS.
Au’g- 13, 1946-
A. J. GARDENHOUR
2,405,733
ELECTRIC HEATER
Filed Feb. 27, 1943
3 Sheets-Sheet 2
‘CV/‘e0 k}: qaralenlzggga
ATTORNEYS.
Patented Aug. 13, 1946
2,405,783
‘UNITED STATES PATENT OFFICE
2,405,783
ELECTRIC HEATER
Allen J. Gardenhour, Waynesboro, Pa.
Application February 27, 1943, Serial No. 477,419
12 Claims.
1
This invention relates to improvements in elec
trical heaters.
The primary object of this invention is the
provision of a relatively compact portable type
of electric heater having a free circulation of
air in such manner as to permit of the most effi
cient and economical heating thereof.
A further object of this invention is the pro
vision of a portable electric heater having forced
(Cl. 219—39)
2
otherwise secured thereto in a triangular ar
rangement so as to support the lower edge of the
casing [0 above a supporting surface in the man
ner shown in the drawings, and permit unob
structed circulation of air upwardly thru the
chamber II. All of these parts are preferably
made of sheet metal and the casing 19 may be
reinforced by annular beads or corrugations I4.
The mode of connecting the sheet metal casing
air circulation. The same is so arranged that 10 i0 is designated at the lap joint shown at I 15 in
the heating unit may be cut out to permit of the
Figure 6 of the drawings.
device being used as a cooling fan in hot weather.
The humidi?er arrangement F may be con
A further object of this invention is the pro
sidered as part of the general housing structure.
vision of a thermostatically controlled portable
It includes lower and upper cover discs 20 and
electric heater which is particularly well adapted 15 2i respectively of preferably the same diameter;
for use in the heating of poultry and animal
which diameter is greater than the external di
brooders and houses.
ameter of the upper end of the casing [0, as shown
A further object of this invention is the pro
in Figure 4 of the drawings. These discs 23 and
vision of an improved electrical heater having
2! are assembled in spaced relation by means of
a novel humidifying assemblage.
a triangular arrangement of screws 23 having
Other objects and advantages of this inven
spacer sleeves or washers 25. The heads of these
tion will be apparent during the course of the
screws are operable from the top plate 2i and the
following detailed description.
7
nuts lie below the lower plate 2|]. The space be
In the accompanying drawings, forming a part
tween the cover plates or discs 20 and 2| may
of this speci?cation, and wherein similar refer 25 vary, but it is preferably rather a shallow depth,
ence characters designate corresponding parts
so as to insulate the top disc 2!, to a certain ex
hruout the several views,
tent, and yet not admit of the loss of any heat
Figure 1 is a side elevation of the improved elec
value. The top plate 2| is provided with a detach
trical heater.
able heat insulated handle 23a, preferably made
Figure 2 is a plan view of the heater.
30 of plastic.
Figure 3 is a cross sectional view showing part
The lower disc 20 is preferably provided with
of the humidi?er or vapor construction of the
heater, the section being taken substantially on
the line 3—3 of Figure 4.
Figure 4 is a vertical sectional view taken thru -
the improved electrical heater.
casing supporting pieces 27, preferably of angle
formation, and made of sheet metal.
These
pieces 2'! are riveted on the inside at the upper
end of the casing Iii and extend thereabove in
a triangular arrangement. Their upper ends are
Figure 5 is a, diagram of the wiring arrange
radially inturned and secured to the under side
ment of the heater.
of the lower cover plate 20 by the screws 23
Figure 6 is a cross sectional view taken thru
the heater substantially on the line 6-6 of Fig 40 above mentioned, as shown in Figure 1 of the
drawings. The screws 23 thus serve a dual pur
ure 4.
pose of retaining the plates or discs 20 and
Figure '7 is a plan view of a heat insulating par
2i spaced and attaching the humidi?er assem
tition.
blage in spaced relation above the casing l U. The
In the drawings, wherein for the purpose of
illustration is shown only a preferred embodi 45 lower disc 28 is spaced 2. suf?cient distance above
the top edge or margin of the casing Ill to admit
ment of the invention, the letter A may generally
designate the improved electrical heater which
of free circulation of air thru this space into the
room.
may consist of a housing construction B; heating
unit C; radiator D; forced draft motor and fan
The humidi?er construction F furthermore in
assemblage E, and humidi?er F.
60 cludes an inverted cone-shaped water receptacle
The housing construction B includes a prefer
3!] which is riveted at 3| to the under surface of
ably cylindrical metal casing l0 open at the top
the disc 20. It is disposed axially of the casing
and bottom and providing a passageway or cham
I0 and is of less diameter at its upper end than
ber ll therein for free circulation of air. The
the internal diameter of the casing Ill. The cone
casing ID has metal supporting legs [2 riveted or
shaped receptacle 30 serves the dual function of
2,405,733
3
acting as a de?ector for the air and a receptacle
for water. It is noted that the lower end of the
receptacle F extends slightly into the upper end
of the chamber H, but for the most part the
4
which clamps the other wire end 93 of the heater
coil 56 in place, as shown in Figure Ll. The screw
92, of course, acts as a conductor and it sup
ports the other terminal 95 in place below the
supporting strip or member til, as shown in
Figure Ll.
In order to protect the motor and cooling fan
edge of the housing ill.
structure and to insure a proper updraft circu~~
The means for ?lling the receptacle with water
lation of heated air, I prefer to place a ba?le ring
is shown in Figure 3 of the drawings and con
Ml], of some insulating material, such as asbestos,
sists of preferably insulated nipples 3-5 supported 10 in
surrounding relation with the lower end por
by and between the cover discs 2d and 2! pro
tion
5? of the heater cone 55, below the resistance
viding passageways so that the compartment
coil 56. It is provided with a central opening
of the water receptacle
can be filled there
it! large enough to space the same slightly from
thru. The passageway thru each nipple 35 also
, the portion 5'! of the supporting cone. It is pro
permits the transmission of vapor to‘ the room
vided with a small opening 282 therein adapted
in which the heater is disposed.
to receive the screw 92 above described; the lat
Referring to the heater assemblage C, the hous
ter receiving a nut as shown in Figure 4 of the
ing or casing Ill in the lower part of the chamber
drawings for the purpose of clamping the ba?le
humidi?er receptacle-de?ector til is disposed in
the space between the cover disc 2% and the top
thereof, is provided with a diametrically disposed
Hill in position.
supporting strip All, the ends of which are down 20 ring
The radiator D, of course, plays an important
turned or angled and riveted at 49 to the 0p
part in its association with the heater unit. It
posite side of the casing it. Its horizontal dis
consists of a cylindrical casing portion H8 open
position in the casing id is shown in Figure 4
freely at its upper and lower ends, having the
of the drawings. If desired, this strip may be
passageway therethru of slightly greater diame
made detachable, but it is preferably perinanent~
ter than the external diameter of the ba?ie ring
ly secured in the casing Ed, and in fact it is the
me. rl‘he casing no is of course spaced from
only part of the heater which is permanently
the casing portion iii of the main housing and
secured to the casing, all other parts being re
the air is adapted to freely circulate in this space
movable, for purposes hereinafter set forth.
between the casings It and lit. The radiator
It is noted that the heating unit supporting
casing I H3 is preferably provided with angle feet
strip 4!} is relatively narrow, as shown in Figure 6
of the drawings, so that it will not interfere to
any great extent with the free circulation of air
thru the chamber l l.
The heating assemblage C furthermore in
cludes a coil supporting cone 55, of insulation
material, such as porcelain, having the resistant
coil 55 wound thereon in approved manner. Im
proved means is provided for the mounting of
I l l at the lower end thereof and externally‘ there
on, for receiving screw bolts H2 by means of
which casing can be detachably clamped upon
the supporting strip till, as shown in Figure 6 of
the drawings.
The radiator D furthermore includes upright
fins H3 welded or otherwise secured externally
upon the radiator casing H0 in a radially dis
posed relation exteriorly thereon. The ?ns H3
this cone so that it will not become loose due to 40 extend into the space between the casings Ill and
expansion and contraction incident to tempera
I Hi and their outer edges terminate short of the
ture variations. To that end the lower end of
inner surfaces of the casing H1, in the relation
the cone is of cylindrical formation, as shown at
shown in Figure a‘ of the drawings. It is to be
5'! and mounted upon an insulator support 53
particularly noted that the ba?ie ring Hi0 does
consisting of lower and upper inter?tting parts
not entirely obstruct the passageway thru the
Gil and 59, disposed respectively below and above
the supporting strip lid, as shown in Figure Ll.
Insulation discs 52 overlie the upper and lower
surfaces of the supporting strip to between the
insulator supporting parts 66 and El, to insulate
the coil connection from this strip 1W. A mount
ing and clamping screw "iii ‘extends axially thru
the insulator support 58 and the coil cone 55,
having its screw head it below the insulator sup
port part and its opposite end being threaded
radiator casing I Hi, but substantially closes that
passageway so that the air must be heated via
the radiator construction between the casings l6
and HG. It is obvious that this insulating ring
its will protect the fan and motor assemblage
and also promote upward deflection of the heated
current.
Referring to the motor-fan assemblage E, I
prefer to provide a rather strong U-shaped sup
porting bracket I25, the upstanding leg portions
thru an adjusting nut 73 in the upper chamber
I25 of which are spaced so as to ?t against the
of the cone 55, as shown in Figure ll. This screw
inside of the casing ii) to be detachably clamped
til acts as-a conductor and it supports a terminal
there as by bolts lZl. The lower ends of these
Bil at its lower end below the strip 453, as shown
upstanding legs are inturned and spaced from the
60
in Figure ii.
sides of the casing Ill and connected by the hori
The coil 56 has a wire connection 82 extending
from the upper end thereof downwardly into the
cone 55 and axially therethru; its lower end be
ing provided with an eye and clamped in place
zontal bight portion I30 upon which the motor
support 53.
is of course angularly positioned with respect
and fan are supported. The lower ends of the
legs of the bracket I25 are secured in stable po
sition against Vibration by a ring or annular sup
on a metal washer 84 lying between the cone 55 65
port l3l, which may be welded to these legs in
and the support 58. Of course the wire 82 is
the position shown in Figure 4 of the drawings,
thus placed in contact and conducting relation
so that the said ring will lie below but in sup
with the screw it).
porting contact with the ends of the resistance
Improved means is provided for mounting and
connecting the other terminal of the coil 5-6, con 70 unit supporting bracket or strip 48 above de
scribed, and as shown in Figures 4 and 6 of the
sisting of an insulator terminal support 99 of
drawings. The bight portion of the bracket I25
preferably exactly the same construction as the
It consists of inter?tting parts
to the length or run of the strip 46, as is shown
mounted in the same insulated relation upon the
strip Lid and provided with an axial screw 92 75 in Figure 6 of the drawings, and this bracket
-,
2,405,783
5
I25‘, while of heavier material than the other
the radiator conduit below the electrical heating
supporting parts of the housing and radiator,
is relatively narrow and will not obstruct free
unit and above the fan.
circulation of air thru the casing I0, to any ap
,
.3. In an electric heater, the combination of a
casing open at its upper and lower ends and
preciable extent.
The motor I40 is detachably secured by bolts
[4| to the portion I38 of the bracket I25, as
shown in Figure 4 of the drawings, so thatthe
providing a passageway therethru, a radiator
It is an object of this invention to permit the
heating unit to be placed out of operation while
its ends, a radiator conduit, supporting means
mounting the conduit in the passageway of the
casing so as not to obstruct the flow of air thru
the passageway, an electrical heating unit in
conduit in the passageway of the casing of heat
conducting material spaced from the inner walls
of the casing to provide a passageway between
the conduit and walls of the casing, an electrical
said motor lies in the extreme lower end of the
casing I6; partially projecting downwardly 10 heating unit, means mounting the electrical
heating unit in the radiator conduit, an elec
therethru, but spaced from the feet of the sup
porting legs I2. The motor shaft I42‘ extends
trical motor fan supported in the casing passage
upwardly thru the bracket portion I30 and is
way below the radiator conduit, and a motor
fan protecting ba?le of insulation material
provided with a fan I50 on the upper end thereof
lying in the space above the bracket portion I30, 15 mounted in the radiator conduit between the
and below the supporting bracket 49. The fan
motor and the heating unit and between the
I50 is of a diameter to extend beyond the radiator
heating unit and the means which mounts the
.casing III} for the de?ection of air in a forced
heating unit in said conduit.
draft upwardly thru the space between the
4. In an electrical heater, the combination of
‘radiator casing III! and the housing casing I8.
20 a casing having a passageway therethru open at
utilizing the device as a cooling fan in warm
weather. To that end, I‘ provide a switch I80
which can out out the resistance unit 56, as shown
in the diagram in Figure 5 of the drawings. In
this wiring system I may also place a thermo
stat I52 so that the device may be used as a
heater in poultry brooders and animal warming
cluding an insulation core and a resistance coil
wrapped thereon, means detachably mounting
said core upon said supporting means, a contact
connector mounted upon said supporting means
for one end of said coil, a second contact con
housings.
30 nector mounted upon said supporting means for
It is readily apparent that the radiator unit E
the other end of said coil, and a ba?ie of insula
can be dsconnected from the housing by remov
tion material mounted upon the last mentioned
ing the cover assemblage. It is also readily ap
parent that the entire motor-fan assemblage can
be disconnected by loosening the bolts I2? and
pulling it down thru the casing It. The heat
ing unit, is, of course, detachably supported upon
the bracket 40 and the parts thereof are readily
accessible upon disconnection of the radiator
and motor units. Thus, the device lends itself
to a practical application. It can be economi
cally manufactured and will insure an e?icient
circulation and distribution of heated air.
contact connector below the heating coil and
within the radiator conduit.
5. In an electrical heater, the combination of
a casing having a passageway therethru open at
its ends, a radiator conduit, supporting means
mounting the conduit in the passageway of the
casing so as not to obstruct the flow of air thru
the passageway, an electrical heating unit in
cluding an insulation core and a resistance coil
wrapped thereon, means detachably mounting
said core upon said supporting means, a contact
Various changes in the shape, size and ar
connector mounted upon said supporting means
rangement of parts may be made to the form of 45 for one end of said coil, a second contact con
nector mounted upon said supporting means for
invention herein shown and described, without
departing from the spirit of the invention or the
the other end of said coil, a baf?e of insulation
scope of the following claims.
material mounted upon the last mentioned
I claim:
contact connector below the heating coil and
1. In a heater, the combination of a heater 50 within the radiator conduit, and an electrical
casing having the upper end thereof entirely
motor fan mounted in the passageway of the
open, a double walled cover having means directly
casing below said insulation ba?le.
connecting and supporting said walls in spaced
6. In a heating unit the combination of a cas
ing, heating means in the casing, a double walled
relation, means mounting the double walled
cover in appreciably spaced relation wholly 55 cover including spaced upper and lower walls,
above the top edge of the casing by widely spaced
bolt and bushing means in the space between the
walls of said cover spacing said walls so that cir
narrow supporting members which will not ap
cumferentially they are entirely open to the space
preciably obstruct the circulation of air thru
the casing and laterally outwardly thru the space
between the walls, a humidi?er carried below
between the cover and top of the casing, and 60 and by the lower wall, conduit means connected
with the walls extending through the space be
handle means on the top wall of the cover.
tween said walls and opening the chamber of the
2. In an electrical heater, the combination of
humidi?er above the upper wall.
an upstanding conduit-like casing providing a
7. In an electrical heater the combination of
passageway therethru, a radiator unit supported
in the casing consisting of a conduit-like body 65 a casing having lateral enclosing walls and de
?ning a chamber open at the top and bottom
mounted so as to be spaced from the inner sur
thereof, a radiator conduit de?ning a chamber
faces of the walls of the casing first mentioned,
therein open at the top and bottom thereof, said
an electrical heating unit in the radiator conduit,
conduit being less in width than the casing,
heat conducting ?ns externally on the radiator
conduit extending into the space between the 70 means mounting the radiator conduit within the
casing in spaced relation with the inner surfaces
thereof, a fan and motor structure mounted upon
radiator for directing air circulation upwardly
the casing below said radiator conduit for circu
lating air upwardly through the space exterior
thru the space between the radiator and the eas
ing, and a motor protecting insulation baflie in 76 of the conduit and within the casing, an electrical
radiator conduit and the ?rst mentioned casing,
motor-fan means carried by the casing below said
2,405,783
8
unit mounted within the radiator conduit, and
insulation means in the lower part of the elec
trical conduit between the electrical heating unit
and the fan and motor structure for protecting
the latter against radiation of heat therefrom.
(17!
8. In an electrical heater the combination of a
cylindrical-shaped casing structure having a
chamber therein open at the top and bottom
thereof, a substantially cylindrical-shaped radia
tor conduit, means mounting it in the casing in
spaced relation with the inner walls thereof to
de?ne an annular passageway between the same
a ring~shaped member mounted upon the closely
spaced lower ends of said legs within the plane
of mounting of said fan and spaced slightly from
the tip ends of said fan, and an electrical heat
ing unit mounted upon and within the casing
above said fan including a radiator conduit hav
ing a passageway therethrough and outer walls
spaced from the sides of the walls of the casing
and inwardly appreciably from the tip ends of
the fan.
1].. In an electrical heater the combination of
a casing structure having a chamber therein open
at the top and bottom thereof, a U-shaped brack
and said walls of the casing, an electrical heat
et including legs and a cross portion, means de
ing unit in said radiator conduit, a narrow brack
tachably connecting the upper ends of said legs
et support connected with said casing in the lower
to the casing, the lower ends of said legs being
part thereof extending transversely thereof be
spaced inwardly from the upper ends thereof and
low said radiator conduit, a fan and motor struc
supporting a narrow strip at the lower ends there
ture mounted upon said bracket, the fan extend
of, a motor detachably mounted upon said strip
ing at its ends appreciably beyond the outer
walls of said radiator conduit for direct travel 20 therebelow having a fan operatively connected
therewith and mounted above the strip, a ring
of air into the space between the radiator con»
shaped member mounted upon the closely spaced
duit and said casing, and a ring-shaped member
lower ends of said legs within the plane of mount
mounted upon said bracket within the plane of
ing of said fan and spaced slightly from the tip
positioning of said fan and in position beyond the
ends of said fan, an electrical heating unit
outer walls of said radiator conduit.
mounted upon and within the casing above said
9. In an electrical heater the combination of
a casing structure having a chamber therein open
fan including a radiator conduit having a pas
sageway therethrough and outer walls spaced
from the sides of the walls of the casing and in
et including legs and a cross portion, means de
tachably connecting the upper ends of said legs 30 wardly appreciably from the tip ends of the fan,
to the casing, the lower ends of said legs being
and an insulation disc mounted in said radiator
conduit below the heating unit for protecting the
spaced inwardly from the upper ends thereof and
fan and motor structure against rays of heat from
supporting a narrow strip at the lower ends there
said heating unit.
of, a motor detachably mounted upon said strip
therebelow having a fan operatively connected
12. In an electrical heater the combination of
a conduit-like casing having a passageway there
therewith and mounted above the strip, and a
ring-shaped member mounted upon the closer
through open at the top and bottom thereof, a
radiator unit supporting the casing passageway
spaced lower ends of said legs within the plane
of mounting of said fan and spaced slightly from
including a conduit-like housing the external
the tip ends of said fan, and an electrical heating
walls of which are spaced from the inner surface
unit mounted upon and within the casing above
of the casing, an electrical heating unit in the
conduit-like housing, a motor, means mounting
said fan.
at the top and bottom thereof, a U-shaped brack
10. In an electrical heater the combination of
a casing structure having a chamber therein open
at the top and bottom thereof, a U -shaped brack
et including legs and a cross portion, means de
tachably connecting the upper ends of said legs
to the casing, the lower ends of said legs being
spaced inwardly from the upper ends thereof and -
supporting a narrow strip at the lower ends
thereof, a motor detachably mounted upon said
strip therebelow having a fan operatively con
nected therewith and mounted above the strip,
the motor upon the casing below said radiator
unit conduit housing, and a ?ange operatively
connected to said motor having a blade structure
of a length to extend at the outer end thereof
appreciably beyond the external wall surfacing
of said radiator unit conduit housing for direct
throw of air currents therefrom into the space
between the external surface of said radiator unit
conduit housing and the inner surface of the eas
ing without surface de?ection into said space.
ALLEN J. GARDENHOUR.
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