Detection devices especially for the detection of flames
AssigneeBicosa Societe de Recherches
InventorHenri E. Courier de Mere
Life of this patent
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Abstract
A detection device comprising two spark-gap electrodes connected to a voltage pulse source having an amplitude greater than the striking voltage of the spark-gap, so that each pulse produces a spark between said electrodes. Such a detection device is characterized in that it comprises, connected to at least one of the electrodes, a detection circuit able to supply at its output a signal whose amplitude is representative of a definite condition of the atmosphere present between said electrodes, particularly of the presence or of the absence, between the electrodes, of an ionized gas such as a flame. Main uses: devices for the generation of sparks for igniting a fuel.
Claims7
A flame detecting apparatus comprising spark electrodes defining a spark-gap therebetween and connected to a source of voltage pulses of a predetermined polarity, said pulses having an amplitude greater than the breakdown voltage of the spark-gap so that each pulse produces a spark between said spark electrodes, further comprising a detection device responsive to high frequency noise signals generated at each spark, said detecting device comprising a diode having two electrodes, wherein one of said electrodes is coupled to one of said spark electrodes to be connected in inverse conduction relationship with respect to said predetermined polarity of said pulses.
Dependencies are inferred from the claim text.