Digital log computer

Claim 1

A DIGITAL LOG COMPUTER COMPRISING: AN INPUT DIGITAL REGISTER SET FOR EACH DIGITAL WORD REPRESENTATIVE OF A DECIMAL NUMBER TO BE COMPUTED IN A LOGARITHM; FIRST AND SECOND DIGITAL ADDRESS SHIFT REGISTERS FOR EACH OF TWO FACTORS REPRESENTATIVE OF THE TWO MOST SIGNIFICANT BITS OF A DIGITAL LOG SERIES OF PREDETERMINED BITS; A FIRST AND SECOND LOG STORAGE MEANS CONNECTED RESPECTIVELY TO SAID FIRST AND SECOND DIGITAL ADDRESS REGISTERS TO CONVERT SAID FACTORS TO DIGITAL NUMBERS REPRESENTATIVE OF THE LOGARITHMS OF SAID FACTORS; A LOW LOG STORE PROVIDING A DIGITAL NUMBER OF LOW ORDER FACTORS REPRESENTATIVE OF THE LOWER ORDER BITS OF SAID DIGITAL LOG SERIES; A THIRD DIGITAL SHIFT REGISTER COUPLED TO SAID LOW ORDER LOG STORE TO READ IN SAID DIGITAL NUMBER OF SAID LOW ORDER FACTOR; A LOG ACCUMULATOR COUPLED TO SAID FIRST AND SECOND LOG STORAGE MEANS AND TO SAID THIRD DIGITAL REGISTER TO ACCUMULATE DIGITAL WORDS STORED IN SAID LOG STORAGE MEANS AND SAID THIRD DIGITAL REGISTER REPRESENTATIVE OF THE LOGARITHM OF A NUMBER; A CLOCK PULSE SOURCE FOR PRODUCING CLOCK PULSES AND DELAYED CLOCK PULSES; A PLURALITY OF DIGITAL "1" DETECTORS; AND A PLURALITY OF GATING MEANS INTERCONNECTED WITH SAID INPUT REGISTER, SAID FIRST AND SECOND DIGITAL ADDRESS SHIFT REGISTERS, SAID FIRST AND SECOND LOG STORAGE MEANS, SAID THIRD DIGITAL SHIFT REGISTER, SAID PLURALITY OF DIGITAL "1" DETECTORS, AND SAID CLOCK PULSE SOURCE TO GATE THE MOST SIGNIFICANT "1" OF SAID INPUT REGISTER TO SAID FIRST DIGITAL ADDRESS SHIFT REGISTER, TO GATE THE SECOND MOST SIGNIFICANT "1" OF SAID INPUT REGISTER TO SAID SECOND DIGITAL ADDRESS REGISTER, AND TO GATE LOWER ORDER DIGITAL "1" BITS TO SAID LOWER ORDER LOG STORE AND REGISTER TO PRODUCE GATED READOUT OF SAID FIRST AND SECOND LOG STORAGE MEANS AND SAID THIRD DIGITAL SHIFT REGISTER INTO SAID LOG ACCUMULATOR IN ACCORDANCE WITH THE GATING SEQUENCE OF THE MOST SIGNIFICANT DIGITAL "1" READOUT OF SAID NUMBER IN SAID INPUT REGISTER WHEREBY SAID DIGITAL NUMBER REPRESENTATIVE OF A DECIMAL NUMBER IN SAID INPUT REGISTER IS COMPUTED IN A DIGITAL NUMBER REPRESENTATIVE OF THE LOGARITHM OF SAID DECIMAL NUMBER ON AN OUTPUT OF SAID LOG ACCUMULATOR.