The invention relates to microwave ovens comprising a circuit for controlling the supply of electricity to a generator of microwave energy, which circuit is connected to the terminals of a voltage supply comprising a main interrupting switch operated by an operating lever which is movably mounted on a control panel, a movable contact which is normally closed, mounted in series with the switch and the opening of which is controlled by a timer connected to the terminals of the network by means of the movable contact, by means of which timer the user can adjust the total duration of the supply of electricity to the generator of microwaves, and also a circuit switch, mounted in series in the control circuit, which is normally in the closed position when a door of the oven is closed and is ready to be used.
Nowadays it has been established that the user employs his microwave oven not only for conventional type cooking operations, but also to meet his daily requirements such as the preparation of breakfasts and reheating a plate containing a prepared food which is becoming cold. Now, although in the first case setting of the timer for a sufficiently long period does not require great precision and presents no difficulty, the same does not apply in the second case, since the user must adjust the timer very precisely around a very small value, of the order of a minute for example.
The particular aim of the invention is to eliminate this difficulty in controlling the timing.