Working: Automatic Irons are fitted with a thermostatic switch to regulate the heat to a specific
predetermined value. The thermostatic switch disconnects the supply when the predetermined
value is reached and reconnects the supply when iron cools down. A turning knob with a dial just
below the handle marked as a rayon, cotton, silk, wool, etc., can be operated to select the
preset temperature depending upon the particular fabric to be ironed. The kind of cloth and the
required heat are given in table I. A lamp fitted in the handle goes off when the desired temperature
is attained.