POWER SOURCE FOR ELECTRONIC FLAME DETECTION DEVICES AND THE LIKE

摘要

In flame detection devices using ionization tubes which measure radiation emitted by the flame, a d-c power source is connected to the ionization tube by current limiting means for abruptly extinguishing the discharge of the ionization tube promptly after its ignition. Energy storing means are provided for storing energy during non-ignition periods sufficient to provide a pulse of sufficient strength to actuate a remotely located indicator device and of a duration which represents the duration of tube ignition. Impedance matching means are provided for matching the detector impedance to the lines which impedance matching means is selected to prevent undesirable oscillation which might otherwise occur due to the presence of the impedance matching means and the energy storing means.