Specifications

100
Operation : It consists of three working parts
1. A bread carriage moves up and down
inside the toast well and it has usually an
external control knob. The carriage
operates a switch that turns the toaster
on and off.
2. Heating elements, made of resistance
wires, are positioned on both sides of
each toast ‘well’. When current flows
through them, they radiate heat for
toasting.
3. A thermostat inside the toaster is linked
to a toast color control outside. The
control enables the user to adjust the
toasting time for different types of breads
or to suit the user’s preference.
Fig. 8.7 - Non Automatic Toaster
When the operating lever is pressed down, the switch contacts are closed, and they remain
closed until the bread carriages are released. Thus, the units are energized from the time the
operating lever handle is depressed until the bread pops up.
In Fig. 8.8, the automatic toaster contains a spring-actuated clock mechanism, the lowering
of the operating handle with its bread carriage energies the spring. This action also completes
the electrical circuit through the heating elements. At the completion of the toasting cycle, the
clock automatically trips the carriage, which returns to its original position, thereby opening the
circuit through the heating element. Fig. 8.9 shows the internal mechanism of an automatic
toaster. Toasting is controlled by the expansion and contraction of the element. When the
thermostat has reached a preselected temperature, it operates a mechanical or electro-
mechanical devices to release the carriage, open the main power switch and pop up the toast.
Fig. 8.8 - Automatic Toaster Fig. 8.9 - Internal Mechanism of an Automatic Toaster