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274 ILLUSTRATED WORLD
Even if You Are Away from Home This Device Will
Record Your Phone Calls
the clapper of the bell. With every
vibration, secured with the minimum of
pressure on the clapper, the pencil operates
and registers the code marks on the
cylinder. This revolves when a governing
clutch is set by the phone owner.
ICE FROM AN ELECTRIC-
LAMP SOCKET
T H E electric ice man has arrived at
last! He has come via the same
route that the electric stove, electric fan,
and electric light arrived; that is, from
the electric-lamp socket. For the price
of a few pounds of ice, say for example
eight cents a day where the electric rate
is ten cents a kilowatt, he will keep your
ice box at a far lower temperature
than ice even in the hottest weather,
will not track up your floors with
mud and water and will furnish
cubes of ice frozen from your own
drinking water.
The new attachment is complete
in one unit. It consists of an electric
motor of one-eighth horsepower,
a compressor to wdiich the
motor is belted, and tinned cooling coils.
To attach it to any refrigerator it is only
necessary to cut a small hole in the top
of the refrigerator, put the cooling coils
in the ice compartment, and attach a
plug to the nearest electric-lamp socket.
The cooling is done by abstracting heat
from the ice box through the tinnedcopper
ice-making coils in wdiich liquid
sulphur is being boiled by the heat extracted
from the ice chamber of the refrigerator.
The sulphur steam, unlike
ordinary water steam, is formed at the
low temperature of fourteen degrees
Fahrenheit. It passes into the electric
condenser where it is again compressed
into a liquid and loses the heat it has
gathered. Thus the same quantity of
liquid is compressed and boiled over and
over again. Each time it goes through
the process it gathers a certain amount of
heat from the refrigerator and radiates
it through the compact coils on top of the
ice box.
Economy of operation is secured by a
thermostat wdiich starts and stops the
motor wdien the temperature rises or
lowers above the temperature it is desired
to maintain. The temperature
inside the ice box remains practically the
same, the variation being less than one
degree. The first cost of this device is
rather high, but afterward it is economical.
Freedom from the Ice Tyrant
When you have this installed, the Silent Giant makes your
ice for you as you need it.