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Патент USA US2412088

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D¢¢- 3, 1946- _
H. B. HoLTHousE
Filed Nov. 12, 1941
'7 Sheets-Sheet 1
Dec. 3, 1946.
H. B. HoLTHousE
Filed Novß 12. 1941
7 Sheets-Sheet 2
l l
Dem 3, 1946.
Filed Nov. l2, 1941
‘7 Sheets-Sheet I5
Dec. 3, 1946.
H. B. HQL'rHousE
Filed Nov. 12, 1941
'r sheets-sheet 4
i', ß
Dec. 3, 1946.
H.B. HoL'rHousE.'
Filed Nov. 12, 1941,
7 ¿heats-sheet 5
Dec. 3, 1E§46.`A
__H. B. HoLTHousÈ
. 2,412,088
Filed Nov. 12, 1941
‘ 7 sheets-sheet e
Filed Nov. 12, V15241
'I sheets-sheet 7
.1 1
| I CQ
¿,103 '
Patented Dec. 3, 1946
Harry B. Holthouse, Chicago, Ill., assignor to
Galvin Manufacturing Corporation, Chicago,
Ill., a corporation of Illinois
Application November 12, 1941, serial No. 418,774
(ci. 12e-11o)
11 Claims.
This invention relates generally to air heating
systems and in particular to a self-contained air
lowing description when taken in connection.
with the accompanying drawings in which:
heating unit including a burner of internal com
bustion type operated in conjunction with an in
ternal combustion «engine and assembled with the
engine as a portable unit to provide for thev sup
ply of heated air at any desired location.
of the invention as applied to the heating of the>
engines of an airplane for starting purposes, the
heater for the purposes of illustration being
shown enlarged relative to the size of the air
Fig. 1 is a perspective view showing one form '
It is an object of this invention to providel an >
Fig. 21S-a fragmentary lsectional view of the
improved air heating system.
Another object of this invention is to provide 10 inlet to the airplane duct system shown in Fig. 1
showing the positioning of a cap thereon when
a portable air heating unit which is compact in
assembly, simple and rugged in construction and
the airplane is innight; t
A further object of this invention is to provide
a portable air heating unit capable of heating an
airplane engine for starting purposes in a mini
with the engine removed therefrom;
Fig. 5 is a. sectional view of the heating unit
mum of time. ’
Fig. 6 is a sectionalrview as seen along line 6
in Fig. 5 showing fuel vaporizing means used in
Fig. 3 is a plan view of the complete heating
eilicient in operation to deliver a relatively large volume of air at a high‘temperature to a source ` ` unit shown in Fig.»1;
Fig. 4 is a side view of the heating unit of Fig. 1
remote from the heating unit;
as seen along the line 5-5 in Fig. 3;
Yet another object of this invention is'to pro
vide a self-contained air heating unit for heating
airplane engines having means providing for its
the operation of thel heater or burner portion of
the complete heating unit;
Fig. 7 is a plan view of another form of a com
.being simply and easily moved about under all
plete heating unit;
` weather conditions;
provide a duct system for heating airplane en
~ ~-
Fig. 8 is a -side view of the heating unit of Fig.
A still further object of this invention is to 25
Fig. 9 is a sectional view as seen along the line
gines which is carried in the airplane wings and
9-9 in Fig. 7 showing the construction of the.
having a common inlet adapted tobe operatively
connected with a source of heat when the plane
is stationary.
` 30
A particular feature of this invention is found '
heater combustion chamber;
Fig. 10 is a sectional view taken along the line
Ill-_I0 in Fig. 7;
Fig-.11 is a side elevational view of another
inthe provision of a portableheating unit in
modified form of the invention;
cluding a heater of internal lcombustion type
- Fig. 12 is an end elevational view as seen look
operated in conjunction with an internal com
bustion engine which is light in weight, and com 35 ingtoward the right in Fig. 11‘; '
posed entirely of preassembled parts compactly
and conveniently arranged, but 'individually re.--
Fig. 13 is a sectional view taken along the lineV
I3-I3 in Fig. 11; and
. ‘
Fig. 14 is a modiñed form of the heating unit
movable from the unit to facilitate work on the
shown 1n Figs. 11-13.
unit_ With the unit parts of a preassembled con
In the practice of this invention there is pro
strurtion a complete part can be carried for re 40
vided a portable self-contained air heating unit
placement purposes so that the unit may be oper
comprising a heater _of internal combustion type
ated with but a minimum of lost time.
adapted to be operated entirely in_conjunction
' Anoth'er feature of this invention is found in
the provision of a duct system for carrying heated
with an internal combustion engine. The heater
air to the engines and cabin of an airplane which 45 and the operating engine therefor are carried on
a carriage or like portable means with the heater - l
is carried in the leading edge of the airplane
extending longitudinally of the carriage and thek
wings and provided with a commonoutlet for
engine disposed laterally to one side of the >
operative connection with a source of heat when
heater.V A fuel tank for supplying fuel to both
the plane is stationary. In flight means-are pro
vided for covering the inlet so that the heat de 50 the heater and the engine is arranged laterally
to the same side of the heater as the engine and
veloped by the engines is fed through the ductv
in substantial alignment with the engine on an
system to provide a de-icing action at the lead
ing edge of the Wings.
Further objects, features and advantages of
A this invention will become apparent from .the fol
axis substantially parallel to the longitudinal
axis of the heater. The longitudinal length of
the complete heating unit is de?ned substantially~
of the conditioning unit 39 extends into the air
by the longitudinal length`> of the heater so that
the unit is capable of being compactly and con
chamber I6. vThe housing member 4I is ~con
structed of a high heat conducting material and
includes an air and fuel mixing chamber 43a
veniently assembled in a relatively small space.
The engine «includes a fan mounted on the crank
shaft thereof to provide air> for burning in the
heater andair for circulating through a passage
in the heaterv arranged in thermal relation with
the heater1 combustion chamber. The engine and
fan assembly, the heater, and the fuel tank are
separately removable from the portable means
as preassembled units to facilitate assembly and'
service work on the heating unit.
at the closed end thereof, and an equalizing
chamber 44 adjacent thereto, the mixing cham
ber 43a and
a heat
44 being
46 Í
having perforations 41 over the >upper portion
The equalizing chamber 44 in turn is
separated from the combustion passage 34a by
a heat insulating plate 48 having perforations 49
arranged peripherally therein. Positioned axial
With reference to the drawings, one form of
the heating unit of this invention is shown in
Figs. 3 and 4 as including a burner or heater I0
of internal combustion type, an air cooled inter
nal combustion engine I I and a fuel tank I2 coin
mon to the engine and heater. These three parts
ly through the housing member 4I and supported ' y
in the housing end 42, and partition plates 46 and
48 is a heating element or conduit portion 5Iv
having an inlet end 52 extending from the'hous- '
ing end 42 and an outlet portion 53 projetcing
outwardly from the open housing end 43 into the -
are mounted on a common sled orportable sup
porting member I3, but individually secured
thereto; securing straps I8' and I2' being used
for the heater I0 and tank I2, respectively, while
20 combustion passage. 34a. .
Arranged in a spaced concentric relation about '
the base (not shown)y for the engine II is sup
extends into the air chamber I6 is a conduit por
that' portion of the housing member 4I which
tion 54 in sealed engagement at one end 56 with
_The'heater I6 is comprised of a substantially 25 thebase `portion 2I of the member 22 and con
cylindrical housing member I4 having a combus
nected. at its opposite end 51 with an exhaust
conduit 58 from the internal combustion engine
tion chamber I5 and an air chamber I6 therein.
The combustion chamber I5 has a tubular outer
II. The annular space formed 4within the con
duit 54 and about the housing member '4I of the
wall I1 closed at one end by a cover plate I8
and at its opposite end I9 by the base >portion 2| 30 fuel conditioning unit 39 is divided 'into con
of a substantially cup-shaped member 22 which K nected passages 45, 50, and 55 by a substantially
L-shaped bafile plate 59a adapted to direct the
defines the air chamber I6. The open end of
‘exhaust gases entering the conduit 54 from the
the member 22 is closed by a cover or end plate
exhaustpipe 58 to travel axially in one direction
23 for the housing member I'4. Thus as is evi
dent from Fig. 3 the air chamber- I 6 and combus 35 of the conduit 54 to the end'56 thereof, and then
ported directly on the sled -or base member I3.
tion chamber I5 are in alignment axially of the
housing I4 and separated from eachother by
the base portion 2 I of the cup-shaped member
22. These two chambers are spaced from the ,
heater housing I4 by ñns 24 angularly spaced
about the combustion chamber I5 and extending
axially thereof, to provide an annular passage
26 about the chambers I5 and I6 (Fig. 5). . An in
let 21 to the passage 26 is at one end 25 of the
housing I4 and an outlet 28 therefor is at the'
housing end 29. As shown in Figs. 3 and 4 the
housing end 29 is of substantially bell shape and
adapted for releasable connection with a flexible
air conduit 3| for conducting the heated air to
a source remote from the heater.
tion chamber I5 and is retained therein in an
assembly position by welding or like means to the
shaped member 22.
into the combustion passage 34a. As indicated
by the arrows in Fig'. 6 this directed flow of the
exhaust gases occurs by virtue vof the gas passing
successively through the passages 45,56 and 55
and thence into the inlet 52 of the heating ele
ment 5I. Since the housing member 4I, parti
tion plate 46 and heating element 5I are' con
structed of a material having high heat con-'
ductivity, the heat from the engine exhaust gases
passingv about- the housing 4I is readily trans
ferred to the heat conditioning yunit 39 for a pur
Thev fuel conditioning unit 39 is provided with
The combustion chamber I5 (Figs. 3 and 5)
is divided into 'four axially extending passages
34a-_34d by' a partition member 36 of substan
tially X-shape and of a construction providing
for the connecting of such four passages to form
a. single serpentine passage. The partition mem
ber 36 is coextensive in length with the combus 60
fins 24. By virtue
continuous passage
I5, the inlet 31 and
both located in- the
of the heating element 5I, from where it is dis
charged through the heating# element outlet 53
Air to be 50 ` pose now to be explained.
heated is circulated through the passage 26 by
a. fan 32 mounted on the engine crankshaft 33
aswill be later described.
' axially in an opposite direction into the inlet 52
of this construction of the
in the combustion chamber
outlet 38'of the passage are
base portion 2Il of the cup
an inlet 6U at the closed end 42, thereof, in which
is positioned an air and fuel nozzle 59. As seen
from Figs. 5 and 6' the nozzle 59 hasl one end 65
thereof extending through the conduit 54 into the
air chamber I6. The end 65 of the fuel nozzle
59 is connected through a pipe 6I with a fuel
pump 62 operatively supported on the engine II,
and in fluid connection with the fuel tank I2
through pipe 63. The pump 62 is common to both '
- theengine II and heater I0 so as to supply fuel
to both thereof during-the normal operation of `
the heating unit. The fuel from the nozzle 59
is introduced into the mixing chamber 43 of the
_fuel conditioning unit 39 together with combus
tion «air from the air chamber I6, this air for
combustion being admitted into the fuel nozzle
through ports 64 in the end 65 and` through tubes
Located within the air chamber I5 and at the
66 arranged about the inlet 60 and connecting the
inlet 31 to the combustion passages 34a-_34d is
a fuel conditioning unit (Fig. 6) designated gen 70 mixing chamber 43 with the air chamber I 6. 'I‘he
erally as 39 and including a substantially tubu
fuel thus admitted into the -mixing chamber 43
lar shaped' housing 4I closed at one end 42 and
is vaporized therein for mixing together with the
open at its opposite or outlet end 43 for fluid con
air, the vaporous mixture passing through the
apertures 41 in the partition plate 46 into the
nection with the combustion chamber passage
34a. As is evident from Fig. 6 the greater part 75 equalizing chamber 44 from where it is discharged
. 2,412,088
through the apertures neat insulating plate u
embodiment, as determined by the combined di
into the combustion passage 34a. This vaporous
mensions of the heater I0 and engine II laterally
of the heating unit is twenty-four inches. 'I‘his
mixture is mixed with the exhaust gases from
embodiment includes an internal combustion en
the heating element outlet 53 for burning there
with in the combustion chamber I5, combustion> Ul gine rated at about one horse -power'and a half,
with the heater and engine having a> fuel con
being initiated by spark means S .positioned in
the combustion chamber passage 34a. and con
sumption during a run of >one hour under'full
Ü nected in operative association with the engine
load conditions of 2.3 gallons. The fuel tank I 2 is
relatively large‘for an engine of this size and has
magneto (not shown). Supplementary air `for
.combustion is supplied through ports 10 connect 10 a capacity of about 8 gallons. The fan 32 is ca
pable of delivering about 1100 cubic feet per min
ing the passage 34a with the air chamber I6,
and tubes 15 connecting the passage 34e with the
The gases from combustion are.
exhausted from the combustion passage outlet
ute from the heater outlet 28 when running at
a speed of about 3600 R. P. M., the _temperature of
the heated air at the outlet 28 during normal op-v
38 into the tail pipe assembly 1K6V for discharge 15 eratingconditions being about 140° C. Theen
tire weight of the complete heating unit includ
from the heater.
.The air for combustion is supplied to the air
chamber |6 by the fan 32, which, as previously
mentioned, also supplies the al1` for circulating
ing the base I3 does not exceed 270 pounds so that
the unit can be moved about rather easily by one
man by sliding the base I3, The relatively solid-
through the passage 26. As is seen from Fig. 5 20 assembly arrangement of the heater I0, engine
the housing/or scroll 61 for the fan 32 is provided
_ with an inlet 68 and an outlet or mouth 69. 'I'he
inlet 1| (Fig. 4) to the air chamber I6 is posi
tionedwithin the inlet 21 lto the annular passage
26, with the mouth 69 of the fan housing 61 being
movable within the inlet 21 to the passage 26 and
releasably connected therewith. By virtue of’ this
, construction the air delivered by the fan 32 is
divided so that a portion thereof is supplied t0
theair chamber I6, and the remaining portion
circulated through the annular passage 26,` The
housing 61 and fan 32 are preassembled with the
II and fuel tank I2 adapts the heating unit for
installation in >a minimum of space, the low
height of. the unit providing for a low center of
gravity which increases the ease with which the
unit can be handled and moved about without
danger of tipping over, and also» serves to retain
the unit more rigid during its operation so as to
reduce excessive vibration thereof.
The portability of the heating unit under some
30 conditions of its operation, such as where .it is
utilized for the heating of airplane engines, may
be facilitated by providing the base I3 with
engine II so as to be movable therewith as a
wheels |20 (Figs. 3 and 4). ' The wheels |20, a
unit, The heater or burner |0 is completely pre
assembled independently of the engine and fan
pair of which is illustrated, may be lrubber-tired
and are rotatably supported at the end |2I of the
assembly, and tank I2, with each of these three
pre-assembled units being separately secured to
base member I3 on mounting means including a
bracket or brace |22 having one portion thereof
the base member I3, as above described. Since
secured to the base member I3, and the other
vthe connection of the fan scroll 61 with the air „portion | 23 thereof extending outwardly from
inlet portion 21 of the heater I0v is accomplished 40 the base end |2| in a direction inclined upwardly
equally> well regardless of whether the outlet
from the longitudinal plane of the base mem
69 is inserted Within the inlet 21, or the inlet 21
ber. The longitudinal extent of the portion |23
is ñtted about the outlet 69, each partmay be
is proportioned relative to a corresponding wheel
removed from the base I 3`independently of the
|20 such that the wheel is lifted above the ground,
other to facilitate assembly and service work on
when the base member is in a horizontal posi
the heater.
tion. In other words the wheel is in substan
From a consideration of Figs. 3 and v4 it is
tially a clearlng‘lposition relative to the ground
seen that the burner I0 is positioned longitudi
when the heating unit is being slidably moved
nally of the base or supporting member I3 with
about on the base member I3. By virtue of this
the engine and fan assembly disposed laterally 50 assembly the wheels |20 are fixedly retained in j
to one side and at the end, 25 thereof. The
an operating positionvso as to be constantly ready
fuel tank I2 is arranged laterally to the same
sliding of the heating unit on the _
' for use.
side of the heater I0 and in alignment- with the
sled or base member I3 beco'mes inconvenient
engine Il on an axis substantially parallel to the
or difficult the heating unit may be wheeled about
longitudinal axis of the heater I0. This ar
on'the wheels |20 by simply raising or lifting
rangement of the heater |0, engine II, and fuel
the base end |24, a handle |26 being provided for
tank I2 provides for a compact assembly of the
this purpose. The handle |26 is of substantially
heating unit in a confined space, the height and
U-shaped configuration with the legs |21 there
length of which is determined essentially by the
of being slidably supported in brackets |28 so as
height and length of the heaterl I0 and the width 60 to be extensible from the -base member. Stop '
by the combined dimensions of the heater I0 and
portions |29 at the Afree end of each leg member
engine il laterally of the heating unit. Since
I21- prevent the handle |26 from being pulled
the engine shaft 33 extends parallel with the lon- ' out of operative _connection with the base member
gitudinal axis of the heater I0, the fan. 32 for
I3. On lifting of the base member end |24 the
the heater I0 and fan unit 11 for coolingv the 65 wheels |20 are lowered into engagement with the
engine |I are also positionedy in alignment on an
ground, with the continued raising of the base
axis substantially parallel to the longitudinal axis
member resting the entire weight of the heating
of the" heater I 0, with the two fans 32 and 11 and
- unit on the wheels. The lifting Aand lowering of 'A
exhaust conduit 58 all being` arranged within the
the base member end |24 is accomplished with
the wheels |20 functioning as a pivot point so
dimensions of the base I3. In one embodiment
of the invention the overall heightof the heat
that the unit is gradually lifted and lowered to
ing unit is less than 15 inches'and of a length
completely eliminate any sudden dropping there
not exceeding four feet, these dimensions defining
of. The heating unit is thus capable of being
substantially the corresponding dimensions of
slidably moved about on the base I3, or wheeled '
the heater I0. The transverse dimension of this
about on the wheels |20 with equal facility since
flning walls for the air circulating passage 28'.
The combustion chamber I8' (Figs. 9 and 10) is
divided longitudinally by partition members 88
both manners of moving the unit are equally
available for use.'
A heating unit of the type described is illus
vtrated in Fig. 1 applied to the heating of air
plane engines for starting purposes. The air
into four passages 8|a-8Id which are inter
connected to provide a continuous pe
through the combustion chamber i5'. These pas
sages are, of a size to provide for the use of a
plane is shown as including a fuselage 18 having
wings 18, with each wing 18 carrying a pair of
engines-88 and 8| thereon enclosed by a cowl
88. The plane cabin 82 is disposed between the
pair of inlets 31’ leading to the passage 8|avand
82 and at the leading edge of each wing 18, the
opposite ends of the duct terminating substan
tialLv atthe wing ends the outermost engines 8|
within a corresponding cowl 88. As is clearly 15
respects to the Vunit 38 fully described above in
connection with Fig. 6. In turn, each outlet 88'
is provided with an exhaust tail assembly 18
a pair of outlets 38’ leading from the passage 8|d.
wings 18 and in the fuselage 18- in a usual manner. 10 Each inlet 31' is operatively associated with a
A duct 83 is positioned transversely of the cabin
fuel conditioning unit 38 which is similar in all
which-_is similar to the corresponding assembly
of Fig. 3. The two fuel conditioning units 38 in
the inlets 31' are operated concurrently with only
lets 88 and 88 being provided inthe duct 83 at
Vone spark S being needed to initiate combustion.
’ the inner engines 88 andouter engines 8 I, respec
'I'he engine Il’ and fuel tank I2' operatively
tively. so that the heated air entering the duct 20 associated with the heater i8', are correspond
inlet 81 is substantially equally distributed about
ingly larger than the like parts in the heating
the engines 88 and 8| -within the space defined
unit of Fig. 3 but are relatively arranged and op
by _their corresponding cowls.~ The inlet 81 is
erated in all respects similar thereto. A further
,arranged substantially intermediate the inner
description thereof is believed, therefore, to be
engines 88 and below the cabin 82 and is adapted 25 unnecessary. Because of the relatively low or
shown in Fig. 1 the duct 83 is of a reduced sec
tion after leaving the inner engines 88, with out
for operative releasable connection with the
pancake assembly of the complete heating unit, a
heater I8 through the ñexible conduit 3|. This
operative connection may be of the usual bayonet
type. A duct portion 88 is attached to the duct
88 for carrying heated air into the cabin 82.
With the duct system in the plane connecting
the engines and cabin, heat is readily supplied
- platform or shelf 82a (Fig. 8) may be supported
thereto by simply connecting the heater |8 _to the
inlet 81.
above the heater or burner |8'> for supporting a
second heating unit or to carry flexible connect
ing tubes, such as the tube 3|, for conveying the
heated air from the heater outlet to a desired 10
cation remote from the heater. The platform
82a is supported on frame members 83 located
about the heater |8’ and extending upwardly
By virtue of the arrangement of the duct'83 in
the wings 18 and at the leading edge of such
wings, it may be utilized during normal flying
operation to provide a de-icing means. Thus
35 from the base member |3 to a position above the
when the plane is in flight a cover or cap means
veniently positioned thereon without being too
heater I8'. By virtue of the flat assembly of the
heating unit, the platform 82 is relatively low.
» so that a second heating unit can be very con
|8| (Fig. 2) having pins |32 for bayonet assem 40 high to operate or service. It is obvious, of course,
bly with corresponding slots |33 in the inlet 81,
that a similar platform structure is' also applica- l
. is positioned over the inlet to plugthe same.
Ible for use with'the heating unit of Fig. 3`.
With the inlet 81 stopped a portion of the air
An arrangement of the heating unit of Figs. l-6
within the cowls 88 heated by the engines is fed
with the engine || and i2 in a superposed rela-,_
into the duct 88 to heat the same, circulation
tion with the heater I8 is shown in Figs'. 1p1-14.
of the air in the duct being accomplishedV by the
The base I8’ is provided with a frame structure
several openings therein at 88 and 88. '
designated generally as 88 and including upright ‘ '
In Figs. 7-10 there is shown a heating unit
which is substantally similar in all respects to
the heating unit of Figs. l-6, except for some .
changes in the construction of the burner, the
corner posts 88.
heating unit of Fig. 7 being somewhat larger
longitudinally of the heating unit are pivotally‘
supported at 88 and |8|, respectively. between '
corresponding posts 88 for pivotal movement lat- ’
erally outwardly from the unit. Except for the
trays 8.1 and 88 the sides and ends of the frame
structure 85 are entirely open, a top |82 provid
than the heating unit of Fig..2 so that the burner
thereof is constructed to provide for a relatively
higher output of heated air.
Side trays 81 and 88 extending ,
Similar numerals .
ing a cover for the heating unit and functioning
of reference primed shall be used, therefore. in
Figs. '1-10 to indicate parts thereof correspond
also as a'brace for the uprights 88.
are a combustion chamber i8' and an air cham
completely about the heater |8. The pairs of
The outlets ~ ' ~
'28a of the air passage in the heater, three of
ing to Figs. 1_6.
which are used in the heating unit of Fig. 11,
Referring to Figs.l '7 and 9, the heater or burner
are thus readily accessible for operative connec
I8’ is seen to include a housing member 88 of 60 tion with flexible conduit means 8|.
substantially rectangular form and having an
'I'he heater I8 is secured directly to the base
open side 8| which is supported directly on the
I8’ by mating gusset plates |88 (Fig. 13) of semi
base member i3. Enclosed within the housing 88
'circular shape andladapted together to extend
ber I8', these two chambers being of a substan 65 mating lplates |83 are spaced longitudinally of
tially rectangular cross-section and arranged
longitudinally of the housing member 88 but
spaced therefrom by radiating fins 82.- The fins
82 are substantially co-extensive in length with
thefcombustion chamber I8' and form- an air
circulating passage 28’ thereabout having an in
let 21' and an outlet 28’. As is best seen in F18.
Y 9 the fins 82 at the bottom ofthe heater I8' serve
to space the chamber I8' from the base member
"i8 lo that the member i8 forms one of the Icon
the heater and in their mating assembly provide
supporting legs |88 at the bottom of the heater,
and a longitudinally extending platform portion
|88 at the top thereof. As shown in Fig. 11 the
platform portion |88 at the heater end 28 is
adapted to alone support the engine || thereon,
with the remaining top' portions |88 serving as
supports for the fuel tank l2. The scroll >81 for
blower or air .circulating fan 32 is\carried directly
75 on the top of the heater at the end 281 thereof.
2,412,088 '
The scroll 61, thev engine I|,_and the fuel tank I2
are thus positioned in longitudinal alignment
laterally ofthe heater I0 and directly thereabove,
with the engine II located between the scroll 61
- and the fuel tank I2, but with all of these parts
for operating the burner, and a fuel tank com
mon to both the‘burner and the engine, each
of which is of a preassembled construction and
adapted for individual mountingon a common .
supporting or base member, Assembly as well
as servicing Awork is thus appreciably simplified
since each of these units is capable of being com
pletely checked before being assembled into its
confined within the longitudinal length of the
heater I0. By virtue of this assembly of the heat
ing unit the over all length of the heating unit is
relative position in the complete heating unit.`
deiined substantially by the'length of the heater
I0, while the width thereofI is determined sub 10A Since these unit parts for a particular heating
unit are interchangeable, they may be kept`
stantially by the transverse dimension or diam
in stock» in their preassernbled form so as .to be
readily substituted for corresponding parts_
With reference to Fig. 14 the heating unit
which require servicing. The hea-ting units are
of Fig. 1l is shown with a .platform structure
adapted for heavy duty service since a part
|01, in place of the gusset plates |03, for sup
requiring attentioncan be worked on while the
porting the engine II and fuel tank I2. The
corresponding workable part is in operation.V
platform |01 is carried on upwardly extending
The overall heating unit is >very compactly ar- y
frame members |05 positioned at the ends and
ranged and capable of a high heat output‘soas .
to each side of the heater I0 and extending
to make it particularly applicable for use in heat
upwardly from the base I3’ to a position imme
the engines of transport or bombing planes
diately above the heater I 0. The engine4 II
' for starting purposes. It is readily appreciated
and fuel tank I2 are -suitably mounted on the
eter of the heater I0.
platform |01 in alignment on an axis substan
that in cases of emergency, the engines must be
heated in a minimum _of time and by means
tially parallel to the longitudinal axis- of the
heater I0, the engine I I Abeing positioned between 25 capable of being quickly and easily -moved about
under all Weather conditions. This ease of han
the fuel tank I2 and the fan scroll 61 which is
-dling is accomplished in the unit by the provision
supported directly on the heater I0.
of lboth vsled and wheel means which are equally
As previously mentionedl side trays. 91 and 98
available for use. The heating unit of this inven
are extended longitudinally of the heating unit
and pivotally supported from the uprights 96. 30 tion is entirely complete within itself and its
operation is initiated concurrently with the oper
The trays 91 and 9_8 in their open positions, as
-ation of the internal combustion engine asso
indicated in dotted lines in Fig. >12, are adapted
ciated therewith. It is apparent, of course, that
to receive therein the ilexible conduit means 3|
the heating unit may be retained 4in operation
corresponding to the three outlets 28a (Fig. 11i ,
each yconduit when deiiated being foldable into a 35 While it is being transported or moved about so
that it need be started onlyV once regardless of
compact bundle. With the conduit means in a
the number of engines to be heated or the loca
folded condition within a corresponding tray,
tion of the planes carrying these engines.
the trays are closed against the heating unit so
Although specific reference has been made to
as to appear as a side thereof, as shown in full
lines in Fig. 12. The flexible conduits are thus 40 the use of this invention for heating airplane
engines. it is to be understood that this is only
completely out of the way when the heating
one application thereof, and that the heating
unit is to be transported or moved about, and
unit may be satisfactorily used for the -heating
immediately available simply by the pivotal mov
of cabins, tents, and auto trailers or the like.
ing of the trays laterally outwardly from the
Further, although the present invention has
heating unit.
been described with speciiic reference to several
The maneuverability of the heating unit for all
preferred embodiments thereof, it is to be under
` weather conditions is facilitated by the provi
stood that it is not to be so limited since changes
sion of collapsible or folding wheels |08 which
are operatively mounted on the sled member I3’` Y can be made therein which are within the full
substantially intermediate the ends thereof. 50 intended scope of this invention as defined by the
When the wheels |08 are not in use they are
adapted to be >folded to a> position indicated by
dotted lines in Fig. 12 above the base member I3’
and to opposite sides of the heater I0. They
are thus removed entirely Within the confines of '
appended claims.
I claim:
1. A portable air heating unit having a base
member for supporting a burner of internal com
bustion type and an internal combustion engine
for operating said burner, a fuel tank common
to said burner and engine, housing means for said
burner having therein a combustion chamber and
the frame structure 95 whereby to increase the
ease in handling the heating unit for moving'it
about on the base or sled member I3'. When
a passage for the air to be heated in thermal re
the wheels |08 are in an operating position the
heating unit is maintained substantially level bv 60 lation with said combustion chamber, said hous
ing means having a length substantially equal to
the provision of a pivotal end support or foot. |09
the longitudinal length of said base, means driven
pivoted to the sled member I3' at III. As shown
by said engine for supplying fuel from said fuel
in Fig. 11 the foot member |09, is pivotally mov
tank to said combustion chamber and engine,
able in a counter-clockwise direction to its dotted
line position on the top of the sled memberv I3'. 65 air moving means operatively connected with said
In its unit supporting position the foot member
engine for supplying air to said combustion cham
ber and air passage. means operatively associated
|09 is moved to its full line position and retained
therein by a clip member II2 secured at its end
with said combustion chamber for vaporizing the
fuel supplied'thereto for mixing together with
I I3 to the base member I3' and open at its oppo
site end I I4 to provide a slotted recess for receiv
vthe air for combustion, and conduit means for
the exhaust gases from .said engine arranged in
ing the foot |09.
thermal relation with said fuel vaporizing means
From a consideration of the above description
and drawings. it is seen that the invention pro
to heat the same, said engine and fuel tank being
positioned in substantial alignment on an axis
v vides a portable self-contained heating unit eom
posed of a burner an internal combustion engine
substantially parallel to the longitudinal axis of
' ~
said housing means and being confined substan
‘with an internal combustion engine, common sup
porting means for said engine and burner, a
ing means.
housing member for said burner having a com
2. In a self-contained air-'heating system in
bustion chamber therein and a passage for air
cludingv means providing for its portability, a fil to be heated arranged >in a thermal relation with
heater of internal combustion type having a
said' combustion chamber, means for supplying
length substantially coextensive with the length
fuel to said engine and combustion chamber in
of said portable means, an internal combustion
cluding a fuel tank carried on said supporting
engine for operating said heater, a. fuel tank com
‘ means, air moving means in driven connection
mon to said heater and internal combustion en
with said engine, and means dividing the flow
gine, said heater having a passage therein for
of air from said air moving means to said com
air to be heated, means driven by said engine and
bustion chamber and said air passage, means
tially within the longitudinal length of said hous
fluid -connected'with said tank for supplying fuel
supporting said air movingmeans, fuel tank, and
to said engine and heater, air moving means op
engine in substantial alignment laterally to one
erated by said engine for circulating air to be- 15 side of said‘ burner, with the longitudinal length
heated through said passage and supplying air
and vertical height of said unit being defined
for combustion to said heater, means in said
substantially by the corresponding dimensions of
heater for vaporizing the fuel supplied-to said
said burner, and the dimensions of said engine
heater for' mixing together with said combustion
and fuel tank laterally of said burner being sub
air, with said engine and fue1 tank being po'si
tioned in substantial alignment on an axis sub
stantially parallel to the longitudinal axis of said,
heater, and means supporting all of said heater,
-engine, fuel tank and air moving means sub
stantially within the dimensions of said portable
3. A unit for heating air including a longitudi
nally extending heater >of internal combustion
type adapted for operation in conjunction with
stantially equal so as to provide for a substan- '
tially uniform width of saidunit over the complete
length thereof.
6.' A unit for heating air including a burner of
internal `combustion type Aadapted to be operated
in conjunction with an internal combustion en
gine having a fuel tank and conduit means for '
exhaust gases, a housing member for said burnerv
having therein a combustion chamber and an air
passage arranged in thermal relation with said
an internal combustion engine having a fuel tank, 30 combustion chamber, said engine and fuel tank
said heater including means defining a combus
being disposed laterally to one side of said hous
tion chamber. said enginev being disposed at one
ing, means- supplying fuel to said combustion
end of said heater and said fuel tank being dis
chamber from said fuel tank, air moving means
posed at the opposite end of said heater, means
operated by said engine for delivering air to said
supporting said engine and tank in` alignment on
combustion chamber and air passage, heat trans
an axis substantially parallel to the longitudinal
fer means in said housing member adapted to
axis of said heater and substantially within the
utilize the exhaust gases from said conduit means _
longitudinal length thereof, said heater includ
« to prepare the air and fuel supplied to said com
ing‘means defining a passage for air to be heated
bustion chamberv for burning therein, means for
arranged in thermal relation with said combus 40 carrying the exhaust gases in said conduit means
tion chamber, aix'- moving means operatively con»
into thermal relation with said fuel preparing
nected with said engine for circulating air through
means, and portable means for said unit includ
said passage.'conduit means fluid connecting said
ing a mounting member adapted to carry said en
' air moving means and said air passage, means
gine, burner and fuel tank in their above-de
in said conduit means for by-passing a portion
fined relative positions, with the longitudinal di
of the air delivered by said air moving means to
mension of said mounting member being deñned
. said- combustion chamber, andmeans for supply
substantially by -the length of said housing mem
ing fuel to said combustion chamber-'and engine
ber, and the lateral dimension of said mounting
. from said tank including fuel moving means com
member substantially by the combined dimen
mon to said heater and engine and operatively
sions of said housing member andengine laterally
connected with said engine. of„said unit, with said fuel tank, housing mem;
4. A system for heating air including a burner
ber and engine all being confined within the di
of internal combustion type adapted for opera
mensions of said mounting member and within
tion in commotion with an internal combustion
a verticaldimension defined substantially by the
engine land operatively assembled therewith on
vertical height of said housing member.
a common mounting means for transportation
7. An air heating system having a burner of
as a unit, a housing member for said burner hav
lng a combustion chamber therein and an air
~passage arranged in thermal relation with said
internal combustion type and adapted for-` opera- ' .
.tion in conjunction with an internal combustion ,
' by said engine for delivering air to said burner
and air passage, a fuel system for said burner and
engine including `a fuel tank carried on said
mounting means and pumping means operatively
positioned against said base member, a combus
tion chamber within said housing means spaced
engine. a portable base member adapted to carry
combustion chamber, air moving means operated 60 said burner 'and engine, housing means for/said
burner having the lower side> thereof open and ,
from said base member and housing means to "
supported on said engine, means-supporting said 65 form an‘air passage, means operated by said en
fuel tank, engine and air moving means in align--_
gine for supplying air to said combustion cham?
ment to one side of said housing member and
ber and air passage, a fuel system for said burner
within the distance defined substantially -by the
and engine including a fuel tank, and means sup
longitudinal `length of the housing member, with“
porting said engine and fuel tank in substantial
.l the vertical height.v of said transportable unit " alignment between opposite ends of said housing
being defined substantially bythe vertical height
means and'on an axis substantially parallel with
vof said housing member.
the longitudinal axis of said housing means.
5. A portable air heating unit- including a lon- . _
8. An air heating unit including portable means
gitudinally extending burner ofßinternal combus
for carrying a burner of internal combustion
non type adapted for _operation in conjunction 75 l type and an internal combustion‘engine opera
1 2,412,088
' 13
tively associated with said burner, with said
burner being of a preassembled construction and
including a housing member having therein a
combustion chamber and a passage forv air to be _
10. A portable air heating unit including a
heater of internal combustion type operated solely
by an internal combustion engine, said heater
having a combustion chamber and a passage for
air to be heated thermally related with said com
heated arranged in thermal relation with said'
bustion chamber, a basev member for supporting
combustion chamber, air moving 'means opera
said heater, frame means secured to said base
tively connected with said engine for delivering
member and extending upwardly therefrom about
aix' to said combustion chamber andl air passage,
said heater, a mounting member carried on said
a fuel system for said engine and burner includ
frame means above said heater for supporting 10
ing a fuel tank mounted on said portable means
and full moving means operatively supported on , said engine, a Vfuel tank common to'said heater
and engine supported on said mounting member,
said engine, said air and fuel moving means being
air moving means operatively connected 'with said
preassembled‘with said engine, and said engine
engine for supplying air to said combustion cham
and fuel tank being disposed laterally .to one
ber and air passage, and means _for supplying fuel
side of said burner, and means for independently ß
to said engine and heater from saidfuel tank
securing said burner, eng1ne,'and fuel tank on
operatively supported on said engine, with said
said portable means so that each of said three
fuel tank, engine and air moving means being
lparte'. is separately removable >from said port
arranged Y substantially within -the longitudinal
able means,
9. A portable air heating unit including a heater 20 length of said heatenand said base member and
mounting member being substantially co-exten
of internal combustion type operated in conjunc
y sive in lens-th with said heater.
ytion with an internal combustion engine, said
11. A heating system including a longitudinally
heater having a combustion chamber and a pas
\ sage for air to be heated thermally related with
said combustion chamber, a supporting member
for said heater, a fuel tank common to said en»`
extending burner and a power unit, said burner
being 'of the internal combustion type' and adapted
for operation in conjunction with said power unit
and _operatively assembled therewith on common
mounting means for transportation as a unit,
said burner having a combustion chamber there
ing means being spaced longitudinally of said
heater with each thereof having a portion posi 30 in, means forming a passage for air to be heated
arranged about said combustion chamber, and‘in‘
tioned at the top of said heater, with at, least
heat conducting relation therewith, a fuel supply
one of said top portions serving as a support for
gine and heater, a plurality of means for securing
' said heater to said supporting member, said secur
system including a fuel tank and means operated _
said engine, and at least another of said top por
by said power unit ‘for delivering fuel to said com
tions serving as a support for said tank, air mov
bustion chamber, air moving means operated by
ing means operatively connected with said engine
said power unit, means for dividing the flow of
>for supplying air to said combustion chamber and
_air from said air moving means to said combus
air passage, and means for moving- fuel to said
tion chamber and said air passage, and means
engine and combustion chamber from said fuel
supporting said airmoving means, fuel tank and
tank~ operatively supported on said engine, with
said fuel tank, engine and air moving means being 40 power unit in substantial alignment on an axis
substantially parallel to the longitudinal axis of
confined substantially within the longitudinal
said burner and substantially within the longi
length of said heater, and said heater defining
lLtée longitudinal length of said supporting mem
tudinal length thereof.
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