Automatic safety device for switching off domestic appliance such as coffee maker some time after end of process

摘要

A switch-off operation is performed by expansion of a component onto a single-pole electro-mechanical switch contact system (4,5) to isolate the appliance from the mains. The component is a bimetallic strip (11) in which expansion is induced thermally via a current flow in a resistor (10) The switching off after a set time after the end of the working process of the appliance, or after a selected time which may be varied by the manufacturer or user.