Recording of analog data on photographic film

Claim 1

APPARATUS FOR PHOTOGRAPHICALLY RECORDING ON A SENSITIZED MEDIUM THE VISUAL REPRESENTATION OF AN ELECTRICAL SIGNAL, SUCH SIGNAL VARYING IN ANALOG FASHION OVER A PERIOD OF TIME, SAID APPARATUS COMPRISING: MEANS FOR DEVELOPING A VISUAL REPRESENTATION OF SAID SIGNAL; A LIGHT-SENSITIVE MEDIUM ARRANGED TO BE EXPOSED TO SUCH VISUAL REPRESENTATION; MEANS FOR PRODUCING A POSITION DISPLACEMENT BETWEEN SAID LIGH-SENSITIVE MEDIUM AND SAID SIGNAL-DEVELOPING MEANS, SAID POSITIONAL DISPLACEMENT OCCURRING CONTINUOUSLY AT A CONSTANT RATE, WHEREBY CHANGES IN THE CHARACTERISTICS OF SAID SIGNAL ARE SEQUENTIALLY RECORDED ON DIFFERENT PORTIONS OF SAID MEDIUM; FURTHER MEANS, INCLUDING A PORTION OF SAID SIGNAL-DEVELOPING MEANS, FOR DEVELOPING A VISUAL PRESENTATION IN THE FORM OF A SET OF REFERENCE INDICIA, SUCH INDICIA ALSO BEING RECORDED ON SAID MEDIUM AND IN EFFECT SUPERIMPOSED ON SAID RECORDED SIGNAL; BOTH THE DEVELOPMENT AND RECORDING OF SAID SIGNAL AND THE DEVELOPMENT AND RECORDING OF SAID REFERENCE INDICIA OCCURRING IN A CYCLICALLY-REPETITIVE TIME-SHARED MANNER, WITH THE SIGNAL DEVELOPMENT AND RECORDING INTERVALS ALTERNATING TIME-WISE WITH THE REFERENCE INDICIA DEVELOPMENT AND RECORDING INTERVALS; SAID LIGHT-SENSITIVE MEDIUM BEING IN THE FORM OF A MICROFILM, AND SAID MEANS FOR PRODUCING A POSITIONAL DISPLACEMENT BETWEEN SAID LIGHT-SENSITIVE MEDIUM AND SAID SIGNAL DEVELOPING MEANS INCLUDING A CAMERA OF THE CONTINUOUSLY-RUNNING TYPE; SAID MEANS FOR DEVELOPING A VISUAL REPRESENTATION OF SAID ELECTRICAL SIGNAL INCLUDING A CATHODE-RAY TUBE HAVING AT LEAST ONE ELECTRON SCANNING BEAM AND A FACE PLATE COATED WITH A SHORT-PERSISTENCE PHOSPHOR; AND SAID MEANS FOR DEVELOPING A VISUAL PRESENTATION IN THE FORM OF A SET OF REFERENCE INDICIA INCLUDING MEANS FOR CAUSING THE ELECTRON SCANNING BEAM OF SAID CATHODE-RAY TUBE TO TRACE A SERIES OF SPACED-APART POINTS ON THE SCREEN OF SAID TUBE, SAID SERIES OF POINTS BEING LAID DOWN IN LINEAR FASHION AND NORMAL TO THE DIRECTION IN WHICH THE POSITIONAL DISPLACEMENT BETWEEN SAID LIGHT-SENSITIVE MEDIUM AND SAID SIGNALDEVELOPING MEANS OCCURS.