Icyball Is Practical Refrigerator for Farm or Camp Use (Aug, 1930)
There is actually a website devoted to the IcyBall units and how to build them
Icyball Is Practical Refrigerator for Farm or Camp Use
MAKING ice from heat at a cost of but two cents a day is one of the latest contributions of science for man’s comfort, convenience and health. The Icyball refrigerator, which operates on this principle, does not require gas or electricity and can be used anywhere.
The operation of this new and unusual refrigerator is simple. There is nothing to get out of order, no moving parts and no odor. It is absolutely noiseless and requires no oiling. The refrigerant never needs replenishing.
The freezing unit consists of two metal balls joined together by a strong metal tube. These balls contain a harmless liquid refrigerant hermetically sealed inside.
Once every 24 hours it is necessary to lift the “Icyball” out of the cabinet, submerging the cold ball in a tub of water, allowing the hot ball to hang outside. The reservoir of the heating unit is filled with kerosene, the flame is lit and the heat soon forces the refrigerant into the cold ball. The “Icyball” is then placed back into the cabinet, and no further attention is necessary for 24 hours. The Icyball is ideal for use in rural homes where it is difficult to obtain ice.