Gunfire control system for supplying aiming information for guns having different ballistic characteristics

Claim 1

A FIRE CONTROL SYSTEM FOR SELECTIVELY CONTROLLING A PLURALITY OF GUNS HAVING DISSIMILAR BALLISTIC CHARACTERISTICS, COMPRISING A DIRECTOR OF PROVIDING TARGET BEARING, ELEVATION AND RANGE SIGNALS, A COMPUSTER RESPONSIVE TO SIGNALS DERIVED BY THE DIRECTOR FOR POSITIONING AND FIRST GUN OF SELECTED CHARACTERISTICS, AND A SIGNAL ALTERNATION APPARATUS INTERPOSED IN THE PATH OF RANGE SIGNALS FROM THE DIRECTOR TO THE COMPUTER WHEN THE SYSTEM IS TO BE USED FOR POSITIONING A SECOND GUN OF CHARACTERISTICS DIFFERENT FROM THE FIRST, SAID APPARATUS COMPRISING A MEANS FOR ALTERING DIRECTOR DERIVED RANGE SIGNALS IN PROPORTION TO THE RATIO OF THE TIME OF FLIGHT OF A PROJECTILE FOR THE SECOND GUN TO THE TIME OF FLIGHT OF A PROJECTILE FOR THE FIRST GUN, SAID SIGNAL ALTERATION APPARATUS ALSO COMPRISING A MEANS FOR ALTERING ADDITIONALLY THE RANGE SIGNALS BY A VARIABLE AMOUNT WHICH IS DEPENDENT UPON THE PRODUCT OF TARGET HEIGHT MULTIPLIED BY SAID RATIO.