Perspective vectorcardioscope

Claim 1

IN AN ELECTROCARDIOGRAPHIC VECTOR DISPLAY SYSTEM FOR DISPLAYING, BY MEANS OF THE INDICATING SPOT OF A CATHODE RAY TUBE, THE THREE-COORDINATE VECTOR WHICH IS THE RESULTANT OF THE OUTPUTS OF THREE ORTHOGONALLY RELATED PAIRS OF ELECTRODES, THE COMBINATION OF: A CATHODE RAY TUBE, MEANS INCLUDING THREE DISTINCT CIRCUIT PATHS FOR CONVEYING THREE ELECTROCARDIOGRAPH SIGNALS REPRESENTING COMPONENTS OF A THREE-COORDINATE VECTOR, MEANS COUPLED TO ALL THREE OF SAID CIRCUIT PATHS OF SAID SIGNAL CONVEYING MEANS AND TO SAID TUBE FOR CAUSING THE INDICATING SPOT OF SAID TUBE TO TRACE OUT A CURVE, IN ACCORDANCE WITH TWO OF SAID THREE SIGNAL COMPONENTS, THE APPARENT LINE THICKNESS OF WHICH VARIES IN ACCORDANCE WITH THE REMAINING ONE OF SAID SIGNAL COMPONENTS, MEANS COUPLED TO ONE OF SAID CIRCUIT PATHS AND TO THE BRIGHTNESS CONTROLS OF SAID TUBE FOR VARYING THE INDICATING SPOT BRIGHTNESS IN ACCORDANCE WITH SAID REMAINING SIGNAL COMPONENT, AND HENCE IN CONFORMANCE WITH SAID APPARENT LINE THICNKESS VARIATION, AND MEANS COUPLED TO THE BRIGHTNESS CONTROL OF SAID TUBE FOR SUPERIMPOSING REFERENCE TIME MARKER BRIGHTNESS FLUCTUATIONS INTO SAID CURVE TRACE WHICH SERVE AS DEPTH REFERENCES, AND WHICH HAVE A RATE OF DECAY TENDING TO INTRODUCE A SENSE OF MOVEMENT IN DEPTH-E.G. A TAPERING TENDING TO "COMET-LIKE" APPEARANCE-INTO THE TRACE, SO AS TO FURTHER EMPHASIZE AND CLARIFY THE APPEARANCE OF DEPTH PERSPECTIVE CREATED BY SAID LINE THICKNESS AND BRIGHTNESS VARYING MEANS.