Magnet-thermocouple system for fail-safe supply of gas to burners or the like

A magnet-thermocouple system for a positive safety supply of gas to burners for a positive safety control of domestic cooking devices, comprising:

• a gas burner connected to a gas supply source with a flame-regulating system and with a safety valve driven by a flame presence sensor comprising a thermocouple,
• wherein said safety valve has an open condition, wherein said supply source supplies said burner, and a closed condition, wherein passage of gas is interrupted,
• wherein the thermocouple, when a flame is present, generates an electrical signal constituting a drive signal that switches said safety valve from the open condition to the closed condition, and vice versa,
• further comprising an additional power supply of a drive signal of said safety valve, for a temporary and alternative supply of the safety valve during flame ignition that heats the thermocouple, to a temperature generating the drive signal,
• wherein the additional power supply of the drive signal comprises power limiters to limit the generated signal and an automatic deactivating unit when the power supply is overloaded for a predefined amount of time, the power necessary for the drive signal of the safety valve being greater than the one determined by the limiters, and
• wherein the power supply of the drive signal is provided with thermal safety elements against overheating in an overload condition, when more energy is requested than a predefined level of deliverable energy.