Computer apparatus for scanning a chart record and determining a mathematical result therefrom

Claim 1

APPARATUS FOR SOLVING THE EQUATION Z=$XY WHERE X AND Y ARE REPRESENTED BY THE LEADING EDGE OF CHART TRACES HAVING MEASURABLE WIDTHS COMPRISING A SCANNER HAVING MEANS FOR MEASURING VALUES OF TRACES ON A CHART AND ALSO OF THE WIDTH OF THE TRACES, A BINARY COUNTER, MEANS FOR GENERATING A SIGNAL REPRESENTATIVE OF LOG X AND A SECOND SIGNAL REPRESENTATIVE OF LOG Y-LOG X AND SIGNALS REPRESENTATIVE OF THE LOG OF THE WIDTHS OF X AND Y, MEANS FOR ENTERING THE FIRST SIGNAL INTO THE BINARY COUNTER AT A FIRST ENTRY POINT AND FOR ENTERING THE SECOND SIGNAL INTO THE BINARY COUNTER AT THE NEXT LOWER ENTRY POINT FROM SAID FIRST ENGRY POINT WHEREBY SAID SECOND SIGNAL VALUE IS HALVED IN ITS ADDITION TO SAID FIRST SIGNAL VALUE IN SAID COUNTER SAND FOR ENTERING SAID WIDTH SIGNALS INTO THE BINARY COUNTER AT THE SECOND LOWER ENTRY POINT FROM SAID FIRST ENTRY POINT WHEREBY SAID WIDTH SIGNAL LOG VALUES ARE QUARTERED IN THEIR ADDITION TO SAID FIRST SIGNAL VALUE PROVIDING A SUM PRESENTATIVE OF