Abstract: A source of energy (1) is connected to an energy storage circuit including a first storage capacitor (2) and a connecting element (3) for connecting the storage circuit to a discharging circuit. The discharging circuit includes in series a energy recovering inductance (4) and an ignition spark plug (5), and to terminals of which the discharging circuit there are connected free wheel diode (6) and a resistor (7) connected in parallel, so as to generate sparks between the electrodes of the spark plug. The energy storage circuit also includes a second capacitor (8) connected in parallel to terminals of the connecting element (3) and inductance element (4).

Abstract: A high energy ignition generator includes an energy source connected to a circuit for charging an energy storage capacitor. The storage capacitor is connected to a discharge circuit consisting of a series inductive circuit for energy recovery and an ignitor having terminals to which are connected freewheel diodes. Sparks are generated between the electrodes of the ignitor, by the discharge of the capacitor in the igniter through the inductive circuit for energy recovery and by the discharge of the inductive circuit in the igniter through the freewheel diodes. The inductive circuit includes at least two inductors. The at least two inductors are connected in series with the capacitor at the time of its discharge and are connected in parallel with the terminals of the igniter at the time of their discharge.

Abstract: The semi-conductive ceramic composition is obtained according to the invention from (a) a basic composition containing 40 to 80% by weight of a semi-conductor which is a silicon or boron carbide, 5 to 40% by weight of a binder or of a mixture of binders chosen from aluminum oxide, beryllium oxide, zirconium oxide, magnesium oxide, silica and silicon nitride, and 0 to 40% of a flux of a mixture of fluxes chosen from alkaline-earth carbonates and oxides, rare earth oxides and metal silicates, and (b) 5 to 40% by weight, relative to the basic composition (a), of a heat-emitting dope chosen from titanium, barium titanate, tungsten and lanthanum boride.

Abstract: This high-energy ignition generator, especially for gas-turbines, of the type including an energy source (1) connected to a first circuit containing an energy storage capacitor (10), an inductor (11) and an ignition plug (12), in series, a free-wheel diode (15) being connected in parallel with the terminals of the inductor (11) and the ignition plug (12) and means of short-circuiting (16) the first circuit so as to generate sparks between the electrodes of the plug (12), is characterized in that the means of short-circuiting (16) include at least one semi-conductor switching device (17,18) controlled by means of comparison (32) of the voltage at the terminals of the storage capacitor (10) with a first reference voltage, and in that means of control (2,3,4,7; 39,40,41) of the charge of the capacitor (10) at a first rate during an initial period of time and at a second rate during a second period of time, the second rate being higher than the first, are interposed between the energy source (1) and the first cir