Apparatus for producing vector patterns of electrocardiographic signals

Claim 1

ELECTROCARDIOGRAPHIC APPARATUS COMPRISING MEANS INCLUDING ELECTRICAL CONNECTIONS FOR ATTACHMENT TO A LIVING BODY FOR RECORDING AT LEAST TWO DIFFERENT ELECTROCARDIOGRAPIC SIGNALS ON A MOVING RECORD AND MEANS FOR SIMULTANEOUSLY RECORDING VECTOR PATTERNS OF AT LEAST SELECTED PORTIONS OF SAID SIGNALS ON SAID MOVING RECORD, THE LAST SAID MEANS INCLUDING A LIGHT BEAM GENERATOR, A FIRST REFLECTING GALVANOMETER ENERGIZED BY ONE OF SAID SIGNALS, A SECOND REFLECTING GALVANOMETER ENERGIZED BY THE OTHER OF SAID SIGNALS, SAID LIGHT BEAM BEING INTERCEPTED AND REFLECTED BY SAID FIRST GALVANOMETER AND THEN BY SAID SECOND GALVANOMETER ONTO SAID RECORD, SAID FIRST GALVANOMETER EFFECTING MOVEMENT OF LIGHT BEAM TRANSVERSELY OF SAID RECORD AND SAID SECOND GALVANOMETER MOVING SAID LIGHT BEAM IN THE PLANE OF MOVEMENT OF THE RECORD, AND VOLTAGE GENERATOR MEANS FOR ENERGIZING SAID SECOND GALVANOMETER WITH A DC VOLTAGE TO DISPLACE THE POINT OF IMPINGEMENT OF SAID LIGHT BEAM ON THE RECORD IN A DIRECTION AND AT A VELOCITY CORRESPONDING TO THE DIRECTION AND VELOCITY OF THE MOVEMENT OF SAID RECORD.