Smoothing filter for a fire control system

Claim 1

A FIRE CONTROL SYSTEM, COMPRISING A SIGHT FOR DETERMINING THE COORDINATES OF A TARGET IN A POLAR COORDINATE SYSTEM AND THE VELOCITY COMPONENTS OF THE TARGET IN THE COORDINATE DIRECTIONS OF SAID COORDINATE SYSTEM AND FOR GENERATING ELECTRIC SIGNALS PROPORTIONAL TO SAID TARGET DATA DETERMINED BY THE SIGHT, MEANS FOR CONVEYING SAID ELECTRIC SIGNALS TO AN ELECTRIC FIRE CONTROL COMPUTER FOR COMPUTING FROM SAID TARGET DATA THE POINT OF AIM FOR A WEAPON, WHICH IS TO FIRE AT THE TARGET, SAID SIGNAL CONVEYING MEANS COMPRISING AN ELECTRIC FILTER DEVICE FOR EACH ELECTRIC SIGNAL GENERATED BY SAID SIGHT, WHICH IS PROPORTIONAL TO AN ANGULAR VELOCITY FO THE TARGET IN AN ANGULAR COORDINATE DIRECTION OF SAID POLAR COORDINATE SYSTEM, COMPUTER MEANS FOR COMPUTING THE COORDINATE DIRECTIONS FOR THE TARGET IN SAID SAID ANGULAR COORDINATE DIRECTIONS FOR THE TARGET IN SAID ANGULAR COORDINATE DIRECTIONS FOR THE ASSUMPTION THAT THE TARGET IS MOVING IN A STRAIGHT COURSE, SAID FILTER DEVICE COMPRISING AMPLIFYING MEANS HAVING INPUT CIRCUIT MEANS AND OUTPUT CIRCUIT MEANS AND A CAPACITIVE FEEDBACK FROM SAID OUTPUT CIRCUIT MEANS TO SAID INPUT CIRCUIT MEANS AND AN INTEGRATING CIRCUIT HAVING AN OUTPUT SUPPLIED TO SAID INPUT CIRCUIT MEANS, A SIGNAL PROPORTIONAL TO THE COMPUTED ANGULAR ACCELERATION OF THE TARGET IN THE ASSOCIATED ANGULAR COORDINATE DIRECTION BEING SUPPLIED FROM SAID COMPUTER MEANS TO SAID INPUT CIRCUIT MEANS OF SAID AMPLIFYING MEANS AND A SIGNAL BEING THE DIFFERENCE BETWEEN THE SIGNAL SUPPLIED FROM THE SIGHT AND PROPORTIONAL TO THE ANGULAR VELOCITY OF THE TARGET IN THE ASSOCIATED ANGULAR COORDINATE DIRECTION AND THE OUTPUT SIGNAL OF THE AMPLIFYING MEANS BEING SUPPLIED TO SAID INTEGRATING CIRCUIT, THE OUTPUT SIGNAL OF SAID AMPLIFYING MEANS CONSTITUTING THE OUTPUT SIGNAL OF SAID FILTER DEVICE.