Milford chronicle., 1939-08-11
FRIGIDAIRE NOTES

| Developed in what is known as the
third epoch in the history of food
preservation. automatic refrigera'
ton for years has been an everyday
convenience for millions of famil-
les. The first epoch was the period
which produced the discovery that
cool caves. springs and cellars help
ed preserve foods, while the second
epoch advanced from this original
primitive method to that of utilizing
ice inside a cabinet.
During the years that represent
the third epoch in refrigeration,
many improvements were made in
the utilization of mechanically pro-
duced cold, but nothing in the way
of an advanced refrigeration prin-
ciple was introduced. 1t was in the
third era that the use of the Hydra
tor" became a household necessity
for safe keeping of vegetables; that
cold controls were perfected for ac-
curate regulation of temperatures;
and that many accessories. for i'm
provement of convenience. were add
ed to food compartments in automat-
ic refrigerators.
This year. however. the fourth era
in household refrigeration was init
lated with the introduction of an en-
tireiy new type of food preservation
known as the Cold Wall principle.
which is feature of Frigidaire cleo
trio refrigerator. Since the incep-
tion of automatic refrigeration. the
production of constant. safe cold
temperatures was the primary OBJ
jective. with no definite considera-
tiOn being given to providing other
factors which. it has been proved.
give an electric refrigerator even
greater food keeping advantages.
In typical automatic refrigera-
tor of the third epoch all cooling is
accomplished by circulating cold
air within the food compartment it.
self Warm air entering the food
chamber moves toward the freezer
where it is cooled. This cold air then
falls and absorbing heat from foods
becomes warm again. which causes il
to rise once more to the freezer. This
natural circulation of cold and warm
all 10 Il IuHudlItIldl Ia w HuN
which had to be Circumvented to
develop the newest principle of food
which uShered in the
fourth epoch of refrigeration. This
Overcomes the drying aC-
lion which is inevitable when foods
are subjected to air movement
II has long been recognized that
'Oods containing a high degree of
moisture will stay fresh longer. even
housh they are uncovered. if the
lir in which they are stored is both /
,old and moist, and does not move. /
Automatic refrigeratOrs were able I
O provide the low degrees of tenn 4
,eTature. hut elimination of moisture |
ibsOrbing air circulation was prob |
EN- more difficult to solve. II involv- |
ID not only new application of an /
Xi;ting mechanical device but in ad- .
Iition il included the combating of .
he physical law of air movement
That the engineers who. worked on f,
his problem solved it effectively is
in the highly efficient !
God protection supplied by the his
ory making Cold Wall Rrigidaire
lectric refrigerator In this refrig-
rator two types of automatic refrig-
ration are provided in a single cab
net. In the upper food compartment
ypical electric refrigeration using
freezer is used to protect foods
uch as milk. beverages and others
n containers. But in the lower COM
'artment a vitality different method
s applied. Here cold is supplied by
ooling coils inside the walls of the
efrigeratOr. These coils extend
round the sides. back and bottom
# the cabinet and simple refriger-
mt flows through them that removes
Ieat as it enters the walls of the
over section of the cabinet. Conse-
no heat filters into the bot
ON food compartment which is
lightly sealed from the upper section
" heavy glass shelf.
By eliminating air circulation in
he lower compartment. a condition
# high humidity is maintained so
hat foods. such as cooked and sliced
old meats. vegetables, fruits and
eft-overs. which contain A high per-
entage of moisture, do not dry out
nd lose their flavor, color and vital
uices. even though they are not
overed. Careful covering of foods
has been an essential fac
or in preventing loss of their mois-
ure The Cold Wall" does away
With this requirement and makes it
ossible to store bulkier foods and
reater quantities of provisions.
1ithout covers. with perfect safety
or days longer than before.
There is a familiar saying that
hings never stand still-that they
ither go backward or forward. De-
elopment of the Gold Wall" is evil
ence that General Motors. manu-
acturers of Frigidaire electric re-
using this new principle,
ecognize the importance of advance
tent of food preservation science so
will serve human needs most eff