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Патент USA US2109052

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Feb. 22, 1938.
2,109,052 _
Filed Sept. 28, 1935
3 Sheets-Sheet l
S m Marin
IV. Sewn/£4461?
,M “4 a.
Feb. 22, 1938.
Filed Sept. 28, 1955
. 5 Sheets-Sheet 3
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M @Si/(vl _
Patented Feb. 22, 1938
Sylvester M. Schweller, Dayton, Ohio, and Ernest
H. Schilling, La Fayette, Ind.; said Schilling as
signor to Peerless Wire Goods 00-, Inc., La
Fayette, Ind., a corporation of Indiana, and
said Schweller assignor to General Motors Cor
poration, Dayton, Ohio, a corporation of Dela-
Application September 28‘, 1935, Serial No. 42,654
1 Claim. (Cl. 211-153)
This invention relates to improvements in the
construction of refrigerator cabinets. and more
particularly to the construction and method of
making food supporting
of the rim portion of a shelf after having been
punched according to the invention;
Fig. 12 is a- view illustrating a method of weld
shelves employed in the - ing cross wires to the rim portion of a shelf; and
interior thereof.
It is an object of our invention to provide an
improved type of shelf for supporting articles to
be cooled in position in refrigerator cabinets and
to provide a novel method of making same.
Another object of the invention is to provide a
shelf which will have a neat and ?nished appear
ance as viewed from the front of a refrigerator
.cabinet when the food compartment access door
thereof is open.
Fig. 13 is a view illustrating a method‘ of de
forming the ends of cross wires of a shelf into
substantially the same horizontal plane with the
apexlof the round rim portion.
Referring to the drawings and particularly to
Fig. 1 thereof there is shown a refrigerator cabi
net generally represented by the reference char
acter l5. Cabinet l5 comprises a food storage
chamber l6 formed by a metal liner having insu
lation surrounding same. A plurality of metal
With the foregoing objects in view it is to be
understood that the shelf must be constructed so
as not to interfere with the circulation of air
within the refrigerator, to provide a flat or plane
surface ‘to objects placed thereupon and to be
panels or a metal shell I1 is placed over the insu
lating material which surrounds the food storage
chamber I6 and this shell forms the exterior ?n
ished walls of the cabinet and provides a sup
constructed so as to support small containers and
the like without upsetting same thereupon.
perimposed ‘compartments by a plurality of
shelyes generally represented by the reference
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 illustrates a front view of a refrigerator '
cabinet having shelves constructed according to
the present invention mounted therein;
Fig. 2 is a top plan view of our improvedshelf;
Fig. 3 is an enlarged sectional view taken on
' the line 3-.-3 of Fig. 2 and showing in detail the
arrangement of cross wires relative to the rim
' member of the shelf;
Fig. 4 is a fragmentary sectional view taken on
port for the chamber and insulation. The stor
age chamber IB is divided into a- plurality of su
character l8. Shelves l8 may be supported with
in the chamber H5 in any suitable and-well-known
manner and are herein disclosed as being mount
ed upon pegs l9v (see Fig. 6) secured to and ex
tending inwardly from opposed side walls of
chamber Hi. It will be noted that the shelf sup—
porting pegs l9 located at the rear of chamber
l6 are disposed on a somewhat lower horizontal. 30
plane than the pegs at the front of chamber l6
for a- purpose to be hereinafter described. A door
20 forms a closure member for the opening which
affords access to chamber l6.
Each shelf I8 comprises a heavy wire rim mem 35
ber 2| which is round in erossesecti‘on and formed
into a general rectangular frame design as shown
in Fig. 2 of the drawings. The rim member 2|
Fig. 5 is a fragmentary sectional view taken on - of shelf I8 is in the present disclosure approxi
the line 4-4 of Fig. 3;
the line 5-5 of Fig. 3;
\mately ?ve-sixteenth inchin diameter and is 40
Fig. 6 is a fragmentary sectional view taken on
formed from a straight piece of wire bent into
the line 5-6 of Fig. 1 and shows the mounting of the shape disclosed and has its ends welded or
the shelf in the refrigerator cabinet;
otherwise ?rmly secured together. A plurality
Fig. 7 is 'a top plan view of a die or the like of horizontally spacedapart cross wires “22 of
_ member employed for receiving and holding the approximately one-eighth inch diameter extend
rim portion of a shelf during the act of perform— ‘ from the front to the back of shelf l8 parallel to
ing a certain operation thereon;
one another and are secured to the rim member
Fig. 8 is a view partly in section of an appa
2|. It will be noted (see Figs. 3 and 4) that ‘all
portions of the rim member 2| of shelf )8 lie in
ratus for punching the rim portion of the shelf;
ig. 9 is a view similar to
8 showing the the same horizontal plane and that the' ends \of
a- position after having completed wires~22 at the rear of the shelf lie upon the
~10 '.
the punching operation‘; _
Fig. 10 is a sectional view of the punching ap- '
paratus‘take'n on the line l0—|0 of Fig. 8;
Fig. 11 is a fragmentary enlarged top plan view
top of rim member 2| and are secured thereto in
any suitable manner such as by spot-welding the
same thereto. The opposite ends of cross wires
22 disposed at the front of shelf l8-r?t into slots
24 provided in the materlai of rim 2| in a man- ' boundaries of rim 2|, and further downward‘
ner to be hereinafter more fully described. The movement of block 34 causes plate 31' to apply
front ends of wires 22 are welded or otherwise pressure to the rim 2|. to hold same ?rmly in
secured within the slots 24 and the tops thereof place in groove 3| and to prevent rotation there
are substantially ?ush with or have the apex of when the punch members 35 begin to cut into
at the top thereof disposed in substantially the
same horizontal plane with the apex at the top
or apply pressure on the one longitudinal side.
of rim 2|. The rubber block or blocks 39.will, of
course, be compressed between plate 31 and block
34 during movement of punch members 35 into
engagement with rim 2 |. As the apparatus moves 10
rounded uniform ?nished appearance throughout the
punch members 35 into the material of rim
its width. In other words, the front edge of the 2| these punch members 35 cut the slots 24 in
improved shelf l8 is\devoid of spaced apart up
the one side of rim 2| or in the material thereof,
wardly extending cross wires similar to the show beginning
at approximately the apex at the top
15 ing in Fig. 5 of the drawings which has hereto
of rim 2| and extending inwardly thereof, along 15
> fore been conventional. It is to be understood
the longitudinal portion thereof to be used as
of the round rim 2|. It will be seen therefore
that- the shelf II as viewed from the front of
10 cabinet l5, when door 20 is open, has a smooth
that the construction employed along the front
edge of the shelf may also be incorporated along
the rear edge of shelf l8, if desired. The con
struction "disclosed obviously renders the shelf
the front'of the shelf. " During the act of cutting
the slots 24 the metal of rim member 2| is pushed
or caused to‘ v?ow outwardly as at 47 away from
the. bottoms of punch members 35 into the space
vthicker at its rear. portion than at the front provided by the cut-away portion 32 in the die 20'
thereof and the arrangement of the pegs l9 at 30 (see Fig. 9). The edge of groove 3| adjacent
the rear. of chamber It, as shown in .Fig. 6 of the ._ the cut-away portion‘ 92 being below the opposite
drawings, on a lower elevation than pegs I9 at edge of groove 3| and below the point at which
25 the front of the chamber permits the top :food
the metal of rim 2| tends to ?ow thereby causes
supporting surface of shelf | 8 to be in a hori
the lower edge of groove 3| to grip the rim mem
zontal plane parallel with other horizontally
arranged portions of the refrigerator cabinet.
Having described and illustrated the'construc
30 tion of ‘the improved shelf l8 of the present in
vention one method ofmaking same will now
be described by referring to the showing in Figs.
7' to 13 inclusive of ‘ the drawings.’ vIn Fig. '7
' there is disclosed a die’ or the-like member 30
of rectangular form having a substantially semi
cylindrical groove ‘3| provided in its top surface
‘adapted to receiyethe wire rim member 2| for
‘ performing the operation of punching the spaced
apart slots 24 therein. A portion of die 30 along
40 one longitudinal edge of groove 3| is cut away as
illustrated at 32 so that the edge of groove‘ 3|
' along the inner portion of rim 2| is disposed on a
lower elevation than the opposite edge of groove
3_| for a purpose to be hereinafter more fully
described. The die 30; with rim 2| positioned in
the groove 3|; is placedunder a punch-press or
the like apparatus as shown in Figs. 8, 9 and 10.
The punch-press‘ apparatus may be of a con
ventional and well-known type and includes a
ber 2| and prevent that ‘portion thereof being
operated on from turning whilepressure is being
applied by plate 31 to all other portions of the
rim member. Other methods of'cutting the slots. so
24 in rim member 2| may be employed but. the
present method is preferable because the ?ow of
metal to form theiextrus'ions 41 as described pro
vides a greater supporting and welding surface
area for the crom rods 22 upon or within the
rim 2|. After the punching operation has been
completed as illustrated in Fig. v9 of the drawings
the rim member 2| is then ready to have the cross
wires 22 applied theretov or mounted thereon.
The design of the slots 24 provided or cut in rim 40,
member 2| may best be seen by reference to Fig.
11 of the drawings.
A cross wire. 22 is placed in each of the hori- - .
zontally spaced apart‘slots 24 of rim member 2|.
Either end of these cross-rod wires 22 may have 45_
been made fast to the rim 2|. However, aftergthe
cross wires 22 have'been positioned within slots 24
to form the food supporting ‘surface of the shelf
reciprocating m'etal block 35 which carries a plu
l8, the shelf is then placed between two ‘electrodes
rality of_' hardened metal punch members 35 5| and 52 of awelding apparatus vso that the one 50
stationarily secured thereto by bolts or any other of the electrodes 52 will engage the top of‘the end
suitable mearm 3,6. A metal pressure plate 31 is of cross wire‘ 22 while the ‘other electrode 5| en_
movably carried by the block 34 and is provided ‘gages the-lower portion of the rim member ‘2|,/as
with a plurality of openings 33 through which shown for illustration purposes in Fig. 12 of the
_ the punch members 35 are adapted to extend. drawings.- The heat passing between electrodes 55
A resilient member 39 constructed of rubber or 5| and 52 through the end of cross-rod 22 and
~ any other suitable compressible material is car
rim or frame 2| causes‘v the cross-rods and rim
ried by block 34 and'is disposed between this block 2| to be ?rmly bonded or ‘fused together. It
60 and the pressure plate‘3‘l. Springs may, if de
will be noted that the apex or top portions of cross
. , sired, be substituted for the‘ rubber compressible wires 22 are, when positioned in slots 24, spaced 60
member 39 in the apparatus disclosed. A plu
a distance of approximately 51, inch from the apex
rality of rods 40, each having an enlarged head or top of rim 2|. This spacing is for the purpose
portion 42 which‘is received in a counter-bore ; vof preventing heating of rim 2| only and, for in
65 43 provided in pressure plate 31, are secured in
. suring that‘ heat will be simultaneously trans
any suitable manner to the reciprocating block mitted through the end portions of the cross wires 65
.34 for suspendingly carrying the members 31 22 and the rim 2| for causing bonding thereof to
,-With the wire rim member 2| within groove’ 3|
of block 30 and positioned beneath the punch‘
press apparatus as shown in Fig. 8, the rim_2| is
ready to be ‘operated upon. As the apparatus
ishmanlpulated to move block '34 downwardly the
plate 31 engages rim member 2|, it being under
75 stood that plate 31 entirely covers the peripheral
gather.v After the cross wires 22 have been bonded
to rim 'gllby the welding operation the“ shelf is
then placed beneath a press (see Fig. 13) and a 70
punchingor pressing tool 53 is caused to‘ strike
the end of each of the wires 22 to slightly deform
same to cause the distance between the tops of
cross wires 22 and the. top of rim member 2 | éto be
diminished or eliminated so that the top surfaces 75
shelf, by virtue of the method of attach?
of wires 22 will be substantially flush .with or on ‘proved
ing the cross wires to the heavy rim member, pro
the same level as the top surface of rim 26.
vides a shelf of great rigidity and eliminates the
After the shelf has been constructed by the necessity of providing a centrally-located rein
method above described it may be plated in any
forcing cross piece.
suitable and conventional manner with any de
While the form of embodiment of the invention
sired metallic substance such for example, as tin
as herein disclosed, constitutes a preferred form,
chromium to provide a ?nish coat over the shelf it
is to be understood that other forms might be
which will resist or prevent rusting of the metal adopted,
all coming within the scope of the claim
and which will improve the appearance of the
which follows.
of shelf l8 will cause all crevices, etc. at the joints
A shelf for a refrigerator cabinet including a
in the shelf structure to be filled with the plating
bounding rim and a plurality of spaced apart
material to thus provide smooth surfaces ad
jacent joints of wires 22 with rim 2i so as to cross members connected to opposite sides of the
rim, said rim being solid and forming the sole
render the shelf easily cleanable.
From the foregoing it will be seen that we have support of said cross members, at least one of said
sides of said solid bounding rim being deformed
provided an improved shelf for refrigerator cabi
at a plurality of spaced apart points to provide
nets and that we have provided a novel method of
making the improved shelf. The improved shelf notches therein, the deformations in said rim 20
being of such character as to extend the notches
20 is of neat appearance since the front edge there
from the top of said one side of said bounding rim
of is smooth and unobstructed by protruding or inwardly
toward the opposite side thereof and
upstanding ends of cross
- from a point inwardly of the outer edge of said one
a lattice-work as is common in present-day shelf
side of said rim’toward the bottom thereof to form a
structures. The improved shelf inherently con
ceals the metal which flows from the slots pro v a continuous end Wall surface and a relatively long ‘
vided in the rim portion 2| since the bosses or continuous bottom wall surface for said notches,
each of said notches receiving and supporting one
extrusions 4? are on the inner surface ‘of rim
2! where they are not seen from the front of the end of each cross member within a portion of the
refrigerator cabinet.
Our improved shelf has
horizontal plane occupied by said bounding rim,
and the bottom wall surface of said notches being
spaced a, predetermined distance from the top of
of lattice-work or the ends of cross wires at the
top of the front edge thereof any object striking ' said rim to position the top of each cross mem
ber at said one side of said rim on substantially
the front edge of the shelf during the act of plac
ing same in the food chamber of the refrigerator the same level with the top of said bounding rim.
cabinet will readily slide over the smooth round
utility in that by eliminating the protruding ends
ed edge and upon the food supporting surface
thereof provided by the cross wires. Our im
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