Aircraft electrostatic discharging system

Claim 1

AN ATUOMATIC ELECTROSTATIC DISCHARGING SYSTEM FOR AIRCRAFT COMPRISING A ROTARY VANE SENSING HEAD FOR CONTINUOUSLY MEASURING THE ELECTROSTATIC FIELD ABOUT THE AIRCRAFT WITH RESPECT TO THE AIRCRAFT AND HAVING AN A.C. SIGNAL OUTPUT PROPORTIONAL TO THE FIELD BEING MEASURED, AN ALTERNATOR ROTATABLE WITH THE ROTARY VANE OF SAID SENSIING HEAD AND HAVING AN A.C. OUTPUT, MEANS TO RECTIFY AND CLIP THE A.C. OUTPUT OF SAID ALTERNATOR AND DELIVER A D.C. OUTPUT OF A PREDETERMINED LEVEL, MEANS TO AMPLIFY THE A.C. OUTPUT OF SAID SENSING HEAD, MEANS TO RECTIFY THE AMPLIFIED A.C. SIGNAL AND CLAMP THEREWITH THE D.C. OUTPUT WHEREBY THE SUM WILL BE A SAMPLED D.C. SIGNAL HAVING A POLARITY AND MAGNITUDE PROPORTIONAL TO THE ELECTROSTATIC FIELD WITH RESPECT TO THE AIRCRAFT, A POSITIVE HIGH VOLTAGE GENERATOR, A NEGATIVE HIGH VOLTAGE GENERATOR, A POSITIVE EXCITER NETWORK, A NEGATIVE EXCITER NETWORK, A PROBE HAD ASSOCIATED WITH EACH OF SAID HIGH VOLTAGE GENERATOR MEANS , AND A POLARITY DISCRIMINATOR SEPARATING THE D.C. SIGNAL AND DELIVERING TO THE RESPECTIVE POSITIVE AND NEGATIVE EXCITER NETWORKS A CORRESPONDING SIGNAL PROPORTIONAL TO THE MAGNITUDE OF THE FIELD SURROUNDING THE AIRCRAFT WHEREBY A CURRENT WILL BE DISCHARGED FROM THE PROBES SUFFICIENT TO MAINTAIN THE AIRCRAFT WITH RESPECT TO ITS ENVIRONS LESS THAN ONE MILLIJOULE.