Serial binary adder

Claim 1

A SERIAL BINARY ADDER CIRCUIT COMPRISING: A FIRST AND SECOND SOURCE OF BINARY NUNBERS; SIGN DETERMINING MEANS ADAPTED TO RECEIVE AND DETERMINED THE SIGN OF THE NUMBERS SUPPLIED BY SAID FIRST SOURCE NUMBERS; COMPLEMENTING MEANS COUPLED TO SAID FIRST SOURCE OF NUMBERS AND TO SAID SIGN DETERMINING MEANS AND ADAPTED TO PROVIDE AN OUTPUT BINARY NUMBER WHICH IS THE NUMBER SUPPLIED BY SAID FIRST SOURCE OF NUMBERS BUT WITH THE FIRST LEAST SIGNIFICANT ONE BIT AND ALL LOWER ORDER ZEROS ONE''S COMPLEMENTED WHEN THE NUMBER IS NEGATIVE AND ADAPTED TO PROVIDE AN OUTPUT THAT IS THE ONE''S COMPLEMENT WHEN THE NUMBER SUPPLIED BY SAID FIRST SOURCE IS POSITIVE; A FIRST EXCLUSIVE OR CIRCUIT HAVING A FIRST INPUT COUPLED TO THE OUTPUT OF SAID COMPLEMENTING MEANS, A SECOND INPUT COUPLED TO SAID SECOND SOURCE OF BINARY A SECOND INPUT HAVING AN OUTPUT; A SECOND EXCLUSIVE OR CIRCUIT HAVING A FIRST INPUT COUPLED TO THE OUTPUT OF SAID FIRST EXCLUSIVE OR CIRCUIT, A SECOND INPUT AND AN OUTPUT; AND DELAY MEANS COUPLED BETWEEN THE OUTPUT OF SAID COMPLEMENTING MEANS AND THE SECOND INPUT OF SAID SECOND EXCLUSIVE OR CIRCUIT; SAID FIRST AND SECOND EXCLUSIVE OR CIRCUITS AND SAID DELAY MEANS ADAPTED TO ADD THE BINARY NUMBERS SUPPLIED BY SAID SECOND SOURCE OF NUMBERS TO THE OUTPUT OF SAID COMPLEMENTING MEANS SUCH THAT THE SUM OR DIFFERENCE OF THE NUMBERS PROVIDED BY THE FIRST AND SECOND SOURCE OF NUMBERS APPEARS ON THE OUTPUT OF SAID EXCLUSIVE OR CIRCUIT.