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Патент USA US2116914

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May w, 1938,
2,116,914
E. F. SCHWELLER
REFRIGERATING APPARATUS
5 Sheets-Sheet 1
Filed Nov. 26, 19552
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May 10, 1938.
E. F. SCHWELLER'“
2,116,914
REFRIGERATING APPARATUS
Filed Nov. 26, 1932
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May 10, 1938.
E.‘ F. SCHWELLER
‘2,116,914
REFRIGERATING APPARATUS
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May 10, 1938.
2,116,914
E. F. SCHWELLER
REFRIGERATING APPARATUS
Filed Nov. 26, 1952
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May 10, 1938.
E. F. SCHWELLER
REFRIGERATING APPARATUS
Filed Nov. 26, 1932
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Patented Nlay 10, 1938
2,116,914 .
STATES’ PATENT OFFICE
2,116,914
REFRIGERATING APPARATUS
Edmund F. Schweller, Dayton, Ohio, assignor,
by mesne assignments, to General Motors Cor
poration,
a. corporation of Delaware
Application November 2c, 1932, Serial No. 644,473
11 Claims. (Cl. 220-9)
This invention relates to refrigerating appa
larly to Fig. 1 there is shown a refrigerator cabi
r'atus' and more particularly to refrigerator cabi
nets.
' net 20 which is constructed of a one piece vertical
“
i 'As a general rule refrigerator cabinets have
been built with a heavy wooden framework to
which is fastened inner metal wallsand on the
outside of which is fastened outer metal panels.
Between the walls there has been provided insula
10
‘ generally tubular sheet metal shell ‘2i rectangu
lar in cross section. In order to hold the tubular
sheet metal shell 2| in position and make it more 5
rigid, there is provided a rectangular bottom
sheet 22 and a rectangular top sheet 23 each of
which are provided with flanges 24 and 25 which
are ?tted within the tubular sheet metal outer
tion, such as cork, which has been scaled by
dipping in or covering it with hot asphalt ‘to pre
vent the access of moisture thereto. Such cabi
nets have been open to a number of objections in
that they are rather heavy, that they require a
large amount of labor and that‘ they are relatively
15 high
in cost.
,
'
shell with their ?anges extending upwardly and 10
downwardly so as to form the top and bottom en
closures for the outer walls of the food compart
ment 26 which is located within the outer wall of
the cabinet. The top and bottom metal sheets
22 and 23 have their flanges 24 and 25 tightly l5
The objects of my invention include the pro
vision‘of a refrigerator cabinet in which the outer
metal walls form the main structural’ framework
welded to the tubular member so as to form a
hermetic air tight joint. These top and bottom
members strengthen the outer tubular shell so as
of the cabinet and which outer metal walls are
to make it self sustaining.
20 sealed so as to prevent the access of moisture to
.
Beneath the bottom sheet metal member 22 20
the insulation, to the provision of a door for such
there are provided legs 21 at the corners of the
cabinet which is also frameless and which has
its metal walls forming the main. structural
framework of the door, and to the provision of a
simple and unique way of supporting the refrig
erating apparatus and connecting di?erent por
tions thereof through the walls of the cabinet.
.It is another object of the invention to provide
an improved method of installing and removing '
cabinet for supporting the food compartment at
a suitable height above the ?oor. In the front
portion of the outer tubular sheet metal member
2| there is provided a large opening which is 25
surrounded by a ?ange 28. Surrounding the
flange 28 are‘ placed wooden frame members
which form a door jamb frame 29.
frigerator cabinet embodying my invention;
In order to properly insulate the walls of the
cabinet there is provided insulating panels one in 30
each wall of the cabinet. In the bottom Wall of
the cabinet there ‘has been provided an insulated
panel 30, in the rear wall, a panel 3i, in the top
wall. a panel 32, and in the side walls the panels
33 and 34. These insulation panels are prefer- 36
ably placed in the cabinet while the cabinet is
lying upon its back. Taking the bottom panel 30
Fig. 2 is a front vertical sectional view of the
cabinet shown in Fig. 1;
rality of rectangular frames 36 which are made
the refrigerating system from the cabinet.
Further objects and advantages of the present
invention will be apparent from the following
description, reference being had to the accom
panying drawings, wherein a preferred form of
the present invention is clearly shown.
In the drawings:
’
'
Fig. 1 is a side vertical sectional view of a re
Fig. 3 is a transverse sectional view 810118 the
line 3--3 of Fig. 2;
Fig. 4' is a fragmentary transverse sectional
view of the door for the cabinet ;
Fig. 5 is a vertical sectional view of the modi?ed
form of‘ the invention in which the refrigerant
compressor is placed beneath the food compart
ment;
.
Fig. dis a fragmentary transverse sectional
view of a modi?ed form of the door;
Fig. 7 is a fragmentary section of a further
modi?cation of the door; and
Fig. 8 is a section upon the line 8-8 of Fig. 7
with the rubber gasket member omitted.
Referring to the drawings and more particu
as an example, these panels are made of a plu
of some low conducting material such as wood. 40
These frames 36 have sheets of bright metallic
foil 31 stretched thereon and fastened thereto by
a suitable adhesive. After the foil is applied, the
frames are stacked together and fastened together
to form an insulation panel wherein the sheets 45
of bright metallic foil 3'! ‘are held in spaced rela
tion with air spaces 38 in between. On each of
the outer sides of each of the panels there is pro
vided a sheet of waterproof paper 39.
After the cabinet has been placed upon its back 50
and the insulation panels inserted in their places
in the cabinet it is'ready for the insertion of the
inner liner and door molding. It has formerly
been the practice to fasten the inner liner which
' is the inner sheet metal wall on the food compart- 1'
2,116,914
2
ment by having its front edges nailed or otherwise
secured directly to the door jamb frame.- In
order to provide a better insulated cabinet and
assembly thereof I have fas
tened the rectangular door molding 40, which is
the cap screws52 which are threaded into the
lower end of the insulated bushings 48.
In order to provide a passage through the insu
lation for the accommodation of the insulating
bushings 48 a plurality of transverse ?at wooden
straps 53, of the same thickness as the framework
made of some suitable low conducting material ' of the insulation panel 32, are provided between
such as wood, to the inner liner 4| which forms the foil at the proper, location and an aperture
the inner sheet metal walls of the cabinet. This
inner liner has a ?ange 42 at its front edge which
?ts against the rear edge of the rectangular door
10
molding and has a bead which extends over the
projecting corner of the'door molding. Wood
screws extend through the ?ange 42 into the rec
tangular door molding to fasten the door jamb
made through this point of the panel so as to
prevent the air spaces between the sheets of foil
from being exposed.
A passage 54 extending
through another set of transverse strips is pro
vided for the refrigerant lines 55 which extend
to theevaporator 5|. In order to keep these lines 15
out of contact with the outer walls of the passage
through the insulation and to close the ends of
the passage there is provided rubber stoppers 55
its front end fastened by wood screws to. the with suitable apertures to receive refrigerant con
of the door jamb frame 29. The duits and ?tted in the ends of the passage 54
' inner periphery
20
door molding 40 isalarger in its outer dimension through upper sheet metal member or top plate 23
and the inner sheet metal member 49 which may
20 than the outer dimension of the inner liner 4|.
Likewise the door jamb frame 29 is also larger also be called bottom plate. In order to insulate
than the outer dimension of the inner liner 4|. the passage 54 some suitable low insulation such
'
manner the
as kapok or mineral wool may be placed therein.
assembly consisting of the inner liner and door The top wall of the cabinet is made removable 25
25 molding may be slipped into the door opening and so that the evaporator and compressor, which
are fastened thereto by the bushings 48, may be
fastened from the outside. By this type of con
struction a substantial barrier is placed between removed therefrom without disturbing the refrig- _ .
the inner liner 4| and the outer metal walls 29 erating system. This is done by connecting the
to prevent heat transfer from the outer walls to top plate 23 to the ?anges 25 through the medium
of the machine screws 51 and a gasket 58 of
30 the inner walls. In order for heat to travel from
the outer wall to the inner liner it is necessary sponge rubber which is clamped tightly between
that this heat be conducted through the door the edges of the top plate 23 and the ?ange 25
molding. Inasmuch as the door molding 40 does to make an hermetic seal. A bottom plate or
not readily conduct heat very little heat will be inner sheet metal member 49 is sealed to the
inner liner 4| by a suitable sponge rubber gasket
35 transferred to the inner liner through this path.
This construction greatly facilitates the assembly 59. This bottom plate 49 has no other support
than the bushings 48. The gasket 59 is com
of the cabinet.
‘
In the upper portion of the cabinet above the pressed by the weight of the refrigerating ele
food compartment 26 I provide a machinery com
ments upon the panel or top wall and by the
partment 44'. The machinery compartment 44 clamping action of the machine screws 51. Con
40
nected to the ‘compressor 46 and the evaporator
has a removable top ornamental cover 45 pro
vided with turned down flanges which ?t over 5| by the flexible refrigerant conduits 56 and 18
' Within
is a sheet metal plate type condenser 80 which is
' the outside of the outer metal walls 2|.
the machinery compartment 44 there'is provided fastened to the rear wall of the cabinet and which
45 a refrigerant compressor 46, preferably of the is cooled by vertically flowing air. ‘
A door BI is provided in the door opening of
sealed unit type, which is mounted upon four
vibration absorbing brackets 41. These brackets the cabinet. The rear portion of the door (see
41 have feet which rest upon the top sheet metal Fig. 4) is provided with a deep pan-shaped
member 23 which is provided with radial ribs sheet metal member 62 having ?anged edges 63
which are fastened to wooden connecting strips
50 formed therein for strengthening this top sheet
metal member so that it may support the weight 84 by suitable wood screws 69. The front por
unit 46 without being distorted. tion of the door BI is provided with a ?at sheet
Beneath the top sheet metal member and directly metal member 65 which has its edges 56 curled
over the outer edges of the connecting strips 54
beneath the feet of the bracket 41 there is pro
vided four bushings 48 of a suitable insulating but spaced and insulated from the rear of the
sheet metal panel 63. The connecting strips are
material such as hard rubber or a phenol con
fastened by means of the machine screws 51 to
densation product. These bushings 48 are pro
vided with reduced portions and shoulders at a bracket member 68 which is preferably spot
their upper and lower ends which extend through welded to the sheet metal member 65. At the
60 suitably located apertures in the top sheet metal rear of the connecting strip 64 there is provided
a rubber air seal which has a forked end. portion
member or plate 23 and inner sheet metal mem
ber or plate 49 which forms the top wall of the with one of the forks ‘ll fastened beneath the
inner liner 4|. The reduced portion at one or flange 53 of the pan member 62 while the other
even both ends of these bushings may be made fork 12 extends over and covers the ?ange ,por
tion 83 of the pan 62 and thereby covers the
65 of a polygonal or irregular shape and the aper
wood screws 69. A suitable foil insulation panel
tures provided with a similar shape so that the 13 which is similar to a foil insulation panel
turn. The refrigerant com;
4|. The door mold
15 molding 40 to the inner liner
wedge shaped and has
' ing 40 in cross section is
bushings will not
_
pressor 46 is fastened to these bushings by having
the cap screws 50 extending through the feet of
70 the bracket 41 and threaded into the bushings 48.
A refrigerant evaporator 5| is provided in the
upper portion of the food compartment 26 imme
diately beneath the inner sheet metal member 49.
' '
75 This evaporator is supported in proper position by
heretofore described is provided at the front and
rear sheet metal members of the door. The onl:
difference between this panel and the othei
panels heretofore described is that the doc:
panel is thicker and has an additional sheet 0
bright metallic foil 14, an additional frame por
tion and an additional air space providing bet
2,116,914
3.
1itertinsulation
for the door portion of the cab
ne .
one outer side wall to the other side wall. 011
In Fig. 5, the cabinet has been so modified
top of this insulation panel the top and bottom
so as to provide a place for the sealed motor
insulation panels, as well as
compressor unit at the bottom. This cabinet 89
is also provided with a vertical generally tubu
lar sheet metal member M which has upper and
panels are placed.
'
At this time the wooden
strips which. make up the door jamb frame 88
are put into place. The inner liner member 88
and the wedge~shaped rectangular door molding
are assembled separately and a reinforcing plate
I96 and the evaporator bolts I8Isare put into
place in the top portion thereof. After mak
10
vided with a similar construction in which the
inner lining 89 is fastened to the door molding
85 which in turn is fastened to the wooden strips
15
a machinery compartment 88. At the bottom of
ing this assembly, the inner liner together with 10
the door molding are slipped into place and
the door molding fastened to the door jamb
screws 101. By so fastening
the door molding to the door jamb frame mem
bers, the in-turned ?ange I88 surrounding the
15
the machinery compartment 88 there is provid- ' door opening is clamped tightly. In this way
ed an angle iron member 89 which extends the inner liner is supported by the door mold
20
ing from the outer sheet metal walls of the cab
around the bottom of the vertical tubular mem
inet. The insulation panels are held against the
ber 8i. At the corners of the angle iron mem
ber 89 are‘ provided suitable cabinet legs 99 pref
erably of sheet metal. Extending across angle
25
iron frame member 89 is a small channel mem
The sealed motor compressor unit 92
cabinet at this time.
The refrigerating system is then placed into
is mounted upon vibration absorbing brackets
the cabinet with the compressor supported on
the cross members 9i and 96 and the condenser 25
is then fastened to the rear wall of the cabinet.
98 which are fastened to a sheet metal plate 99
which has a forked front end 95 which engages
30
outer walls of the cabinet by the inner liner 8d. 20
The door for the cabinet may be put on the
the channel member iii. The rear end of the
sheet metal plate 98 is fastened by suitable
bolts to a rear cross member 96. The sheet
1 metal plate 98 is fastened by suitable gussets ill
to a vertical plate type condenser 98 which is
ornamental nameplate I 92 is fastened to the
compressor unit 92 and the condenser 98 extend
up the back of the cabinet and over the top
of the food compartment 8i through a notch 99
in the front top portion of the cabinet to an
40 evaporator Hill which is supported by the. bolts
Iili from the bottom sheet metal plate on the
top wall of the cabinet. The notch 99 is formed
by displacing the central portionv of the front
III and the notch a name plate I82 has been
50 fastened to the cabinet in such a manner as to
cover this notch. In this way it is not necessary
the insulation panels or the
of the food compartment in
order that the refrigerant lines may be connect
55 ed to the evaporator.
}
This cabinet is assembled in a manner similar
to that described for a top unit style. In the
style of cabinet shown in Fig. 5, the vertical gen
erally tubular sheet metal outer shell is ?rst
formed into shape and the top and bottom
?anged sheet metal members or plates 82 and
83 are then hermetically fastened thereto by a
suitable welding or soldering operation. At this
time the lower angle iron ?ange 89 is also welded
to the tubular member. " The cabinet is then
turned upon its back. The insulation panels I05
are placed within the cabinet against the outer
sheet ‘metal walls of the cabinet. These panels
are made in a‘ manner similar to that described
for the top unit style and are composed of a
plurality of sheets of bright metal foil spaced ‘by
thin air spaces. The rear insulation panel cov
ers the entire rear portion of the cabinet and
extends from the top sheet metal member82 to
the. bottom sheet metal member 83 ‘and from
the rubber tubular member III thereon are ex
tended over‘ the top of the cabinet and placed
within the notch in front of the cabinet while 30
the evaporator is bolted to the upper portion of
the inner liner ‘by the bolts IM. After this, the
mounted upon a rear wall of the cabinet. Flex
35 ible refrigerant lines I83 from the sealed motor
sheet metal wall of the cabinet and by cutting
45 a notch in the upper portion of the door'jamb
85. Within this notch a suitable rubber tubular
member III and the refrigerant lines are placed.
In .order to cover this rubber tubular member
After this the ?exible refrigerant lines I88 with '
front of the cabinet so as to cover the refriger-'
ant lines at the front of the cabinet and the orna 35
mental top cover I89 is put into position on the‘
top of the cabinet so as to cover the refrigerant
lines extending over the top of the cabinet.
In Figs. 6 to 8 inclusive a simpli?ed form of
door construction is shown for the cabinet shown 40
in Fig. 5. In this construction, a deep pan-shaped
rear sheet metal member II 5 is provided with
a ?anged edge portion II6. An insulating panel
“I, made up of a plurality of frames II8 having
sheets of bright metallic foil H9 therebetween, is
placed within the pan-shaped member I I5. On
top of this‘ is placed the outer'sheet metal door
member I20 having a curled edge portion I2I
and a necked-in or recessed ?anged attaching
portion I22 which forms a sort of ledge is placed
over the pan-shaped‘ member and the insulation.
A thick rubber gasket member I23 is provided
between the flanged edge IIB of the pan-shaped
member “5 and the recessed attaching portion
I22 of the outer sheet metal member I20. This 55
rubber gasket member I23 extends entirely
around the door and is provided with an integral
air sealing portion I24 which extends therefrom
and rests against the curled edge portion I2I of
the outer sheet metal member I29. The attach 60
ing portion I22 is recessed sufficiently to accom~
modate the thick rubber gasket member I28. This
rubber gasket member acts as an insulation ,be
tween the pan-shaped member H5 and the outer
sheet metal member I20.
In order to fasten7 these parts together, brass
screws I25 are provided which extend through
the ?anged edge portion H6 of the pan-shaped
member H5 and are threaded into a tapped ex
truded portion I26 upon the recessed fastening 70
portion of the outer sheet metal member. In
order to cover the brass screws‘ I25 the rubber
gasket is made in a sortv of a forked design so
that a lip or extension I21 of rubber is provided
2,116,914
4
which extends over the brass screws I25 and the
metically but removably sealed to the outer. walls,
said insulation panel having a plurality of strips
?anged edge portion I I6 of the pan-shaped mem
between the sheets of- foil and an aperture through
ber H5; It will be seen that this door construc
tion consists of only ?ve elements. The insula
the strips and sheets of foil for providing a sealed
tion panel, the‘ pan-shaped member, the outer
opening through the foil panel.
'
4. A refrigerator cabinet comprising a box-like
sheet metal member, and the fastening screws
structure including an inner liner forming a com
I25. \This greatly simpli?es the construction of
partment to be cooled within said cabinet and
having an access opening,
surrounding
said inner liner for insulating said compartment, 10
and means forming a supporting structure for the
liner and said means for insulating said compart
ment and forming as well the outer ?nish walls
of the cabinet, said second named means having 15
an opening in one side thereof adapted to register
the door and lowers the cost of the door by pro
viding a very thick rubber gasket member be
tween the pan~shaped sheet metal member and
the outer sheet metal member, heat conduction
between the inner and outer sheet metal members
is effectively prevented. The brass screws are
su?iciently small so that heat leak through the
is not a serious matter.
15 screws
However, it is possible to prevent heat leak
with said compartment access opening of the
cabinet and comprising an integral continuously
through the brass screws by the construction extending one-piece sheet metal tubular element ,_
shown in Figs. '7 and 8. In this construction extending continuously across the side of the 20
keyhole slots I30 are cut in the recessed attach
cabinet having the access opening therein and
ing portion I32 of the outer sheet metal member. continuously across two adjacent sides and the
20 Within the smaller portion of the keyhole slot
back of said cabinet.
‘ .
r
.
5. A refrigerator cabinet comprising a box-like
there is slidably inserted the nuts I3I of a mate
rial having low heat conductivity such as hard structure including an inner liner forming a com- .
rubber which is provided with a squared groove partment to be cooled within said cabinet and 25
upon its periphery which engages the edges of having ‘an access opening, means surrounding‘
25 the narrow portion of the keyhole slot I30 50
said inner liner for insulating said compartment,
that the nut I3 I is tightly held and prevented means forming a supporting structure for the
from turning.
30
The brass screws I35 are then
threaded into these nuts I3I and otherwise the
door is similar in every respect to the form shown
in Fig. 6.
liner and said means for insulating said com
partment and forming as well the outer ?nish
walls of the cabinet, said second named means.
having an opening in one ‘side thereof adapted to
30
While the form of embodiment of the invention register'with said compartment access opening
as herein disclosed constitutes a preferred form, of the cabinet and comprising an integralcontinu- '
it is to be understood that other forms might be ously extending one-piece sheet metal tubular 35
adopted, all coming within the scope of the claims element extending continuously across the side
35
of the cabinet having the access opening therein
which follow.
}
What is claimed is as follows:
.
" and continuously
across two adjacent sides and
1. A refrigerator cabinet including an inner the back of said cabinet, and the vertical portions
liner, a rectangular door molding fastened to the of said sheet metal tubular element extending con 40
front edges of the inner liner, said door molding - tinuously beyond the means for insulating said
having low heat conductivity, 40
compartment and. providing a plurality of ver
being of a material
a door jamb frame of a material having low heat tical walls of a second compartment for enclos
conductivity surrounding'the front portion of the ing a refrigerating machine ‘adapted to be as
rectangular door molding, fastening means for.
with the cabinet.‘
‘
'
fastening the rectangular‘ door molding to the sociated
cabinet comprising a box-like .
6.
A
refrigerator
_
46 door jamb frame for supporting the inner liner, structure including an inner liner forming a'
sheet metal outer walls fastened to and support
compartment to be cooled within said cabinet. and
ing the door jamb frame,'and insulating means having an access opening, means surrounding said
between the outer metal walls and the inner liner. inner liner for insulating said compartment, 50
2. A refrigerator cabinet including an inner means forming a supporting structure for the
‘so vliner, a rectangular door molding fastened to the» liner and said means for insulating said ‘compart-f‘ front edges of the inner liner, said door molding ment and forming as well the outer ?nish- walls - ‘ I
being of a material having low heat conductivity, ' of the cabinet, said second
I
named meanshaving
a door jamb frame of a material having low heat an opening in one side thereof adapted to register 55
conductivity surroun ‘ng .the front portion of the ‘with said compartment access openingof the- “
55 rectangular door molding, fastening means for
cabinet and comprising an integral continuously
fastening the rectangular door molding to the extending one-piece sheet metal tubular element
door jamb frame for supporting the inner liner, extending continuously ‘across the side of the
a large vertical generally tubular sheet gmetal cabinet having the access opening therein and
member surrounding the inner liner but spaced continuously across two adjacent sides and the
therefrom and being fastened to the door jamb back of said cabinet, and the vertical portions of '
frame for supporting said frame’, and ?anged
transverse upper. and lower sheets insertedwith
inwthe tubular member and having the ?anges
fastened to the tubular member for closing the’
65
end portions thereof.
'
_
I -
v
3. A refrigerator cabinet including inner and
insulation between the inner
outer metal walls,
and outer walls, said cabinet having a removable
wallv comprising a top plate and a bottom plate,
70 an‘insulationv panel between the top and bottom
plate, said insulation panel comprising a plurality
of sheets Including at least one of bright metallic
foil held in spaced relation with air spaces bp-_
tween'by a framework, said top plate being her
said sheet metal tubular element extending con--v
tinuously beyond the means for insulating said
compartment and providing at least three im
pervious vertical walls of a-second compartment.
for enclosing a refrigerating'machine adapted to
be associated with the‘. cabinet.
_
'
'
'
'7. A refrigerator cabinet comprising‘ a box-like
structure including an inner liner forming a com
partment to be cooled within said cabinet, and
having an- access opening, meansfsurrounding'
said inner liner for- insulating said compartment,
means forming, a ‘supporting structure for the
liner and said means for insulating said compart-j
70
2,116,914
ment and forming as well the outer ?nish walls
of the cabinet, said second named means having
an opening in one side thereof adapted to register
with said compartment access opening of the
cabinet and comprising an integral continuously
extending one-piece sheet metal tubular element
extending continuously across the side of the
cabinet having the access opening therein and
continuously across two adjacent sides and the
10
15
5
tion of said refrigerant circulating means to said
bushings, means for securing a portion of said
cooling element to said bushings, said securing
means cooperating with one another and with
said wall structure to form a rigid unitary con
struction, and said rigid unitary construction be
ing adapted to be bodily removable from the re
frigerator cabinet.
back of said cabinet, sheet metal closure means
extending across the tubular element above and
below the said means surrounding said inner liner
10. A refrigerating apparatus comprising a wall
structure adapted to be supported upon a refrig_ 10
erator cabinet to form a part of an insulated top
for insulating said compartment, and said sheet
metal closure means being secured to said tubular
wall of a food storage compartment thereof, said
wall structure including spaced apart outer and
element in such manner as to form a hermetic
‘
seal about said means for insulating said com
terial therebetween, said wall structure having
insulating bushings passing through the insulat 15
ing material thereof and extending between said
nartment.
B. A refrigerator cabinet comprising a box-like
structure including an inner liner forming a com
20 partment to_ be cooled within said cabinet and
having an access opening, means surrounding
said inner liner for insulating said compartment,
means forming a supporting structure for the
liner and said means for insulating said compart
ment and forming as well the outer ?nish walls
of the cabinet, vsaid second named means having
an opening in one side thereof adapted to regis
ter with said compartment access opening of the
30 cabinet and comprising an integral continuously
extending one-piece sheet metal tubular element
extending continuously across the side of the
cabinet having the access opening therein and
continuously across two adjacent sides and the
35 back of said cabinet, sheet metal closure means
extending across the tubular element 'above and
below the said means surrounding said inner liner
for insulating said compartment, said sheet metal
closure means being secured to said tubular ele
ment in such manner as to form a hermetic seal
40 about said means for insulating said compart
ment, and portions'of said sheet metal tubular
element extending continuously beyond one of
said sheet metal closure means and providing at
least three walls of a second compartment for
45 enclosing a refrigerating machine adapted to be
associated with the cabinet.
9. A refrigeratingapparatus comprising a wall
structure adapted to be supported upon a refrig
erator cabinet to form a part of an insulated wall
'50 of a food storage compartment thereof, said wall
structure including spaced apart sheet metal
55
metal members and insulating ma
outer and inner sheet metal members, a refrigere
ant circulating unit mounted on the side of said
wall structure adjacent said outer sheet metal
member thereof for disposition exteriorly of the 20
food compartment of the refrigerator cabinet, a
cooling element mounted on the side of said wall
structure adjacent said inner sheet metal member
thereof for disposition within the food compart 25
ment of the refrigerator cabinet, means for se
curing a portion of said refrigerant circulating
unit to said bushings, means for securing a por
tion of said cooling element to said bushings, said
securing means cooperating with one another and 30
with said wall structure to form a rigid unitary
construction, and said rigid unitary construction
being adapted to be bodily removable from the
refrigerator cabinet.
11. A refrigerating apparatus comprising a wall 35
structure adapted to be supported by a refriger
ator cabinet to form a part of an insulated wall
of a food storage compartment thereof, said wall‘
structure including spaced apart metalmembers
vand insulating material therebetween, said struc 40
ture having insulating bushings extending be
tween the spaced apart metal members thereof,
a closed refrigerating system ‘attached to said
wall structure and including an evaporator con
nected with a plurality of elements forming a re
frigerant liquefying and circulating unit, means
45
for securing a portion of said evaporator to said
bushings on one side of said wall structure for
disposition within said food storage compartment
of said cabinet, means for securing a portion of
one of said elements of said refrigerant liquefying
and circulating unit to said bushings on the op
posite side of said wall structure for disposition
exteriorly of said food storage compartment, said
exteriorly of the food compartment of the re
frigerator cabinet, a cooling element'mounted on
the, opposite side of said wall structure for dis
position within the food compartment of the‘
refrigerator cabinet, means for vsecuring a por
securing means cooperating with one another and
with said wall structure to form a rigid unitary 55
construction, and said unitary construction be
ing adapted to be bodily removable from the re
frigerator cabinet.
,
EDMUND F. SCHWELLER.
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