Specifications
99
In Fig. 8.6,
1. Electrical energy flows into the toaster from a wire plugged into the domestic electricity
supply.
2. The electric current flows through a series of thin filaments connected together but
spaced widely enough apart to toast the whole bread surface.
3. The filaments are so thin that they glow red hot when the electricity flows through them.
4. Like a series of small radiators, the filaments beam heat toward the bread in the toaster.
5. The steady supply of heat rapidly cooks the bread. There are filaments on each wall of
the toaster so the two sides of the bread cook at the same time.
Basically a toaster is made up of a rack to hold slices of bread and a heating element
located near the bread slices. The object is to heat the bread until it is toasted to a desired color.
The normal working temperature of a toaster varies from 85
0
C to 1000
0
C from the heating
element to the toasting zone.
8.5 TYPES OF ELECTRIC TOASTERS
Available in two types; namely; ordinary or non-automatic and automatic types. In
non-automatic toasters, the user must keep watching the bread, while it is being toasted so that
he can turn off the heat before it burns the bread. But an automatic toaster does all the necessary
operations itself.
Non Automatic Toaster : It consists of a metal shell containing a bread rack and a heating
element. The doors on either side are hinged at the bottom, and swing out from the top and
downward to a horizontal position. Bread is placed on the doors, which are then closed, thus
bringing one side of each slice of bread close to the heating element mounted in the centre of
the toaster shell. When one side is toasted, the door is opened manually, as shown in Fig. 8.7.
The bread is to be turned manually for toasting the other side. The doors are then closed. The
non-automatic toaster has neither switches nor thermostats.
Automatic Toasters : Automatic toasters are built in two and four slice sizes. They are often
referred to as automatic pop-up toasters and these toasters perform automatically the operation
required for toasting.
Fig. 8.6 - Bread toaster