Data recorder

Claim 1

IN A DATA RECORDING DEVICE HAVING A CONTINUOUSLY ROTATING MEMBER, SAID MEMBER BEING GENERALLY OPAQUE TO RADIANT ENERGY SAID HAVING A FIRST COLUMN OF CHARACTERS SPACED THEREAROUND, SAID CHARACTERS BEING TANSPARENT TO RADIANT ENERGY, MEANS FOR GUIDING A PHOTOSENSITIVE MEDIUM ADJACENT A FIRST SURFACE OF SAID MEMBER, A FIRST SOURCE OF RADIANT ENERGY ADJACENT AN OPPOSITE SURFACE OF SAID MEMBER AND IN ALIGNMENT WITH SAID FIRST COLUMN, AND A COINCIDENCE GATE HAVING AN OUTPUT CIRCUIT OPERATIVELY CONNECTED TO SAID FIRST SOURCE, SAID GATE HAVING A FIRST SET OF INPUTS AND A SECOND SET OF INPUTS AND EFFECTIVE TO ENERGIZE SAID FIRST SOURCE WHEN A COMBINATION OF INPUT SIGNALS ON SAID FIRST SET CORRESPONDS WITH A COMBINATION OF SIGNALS ON SAID SECOND SET, THE COMBINATION COMPRISING A SECOND COLUMN OF TRANSPARENT MARKS SPACED AROUND SAID MEMBER IN DIFFERENT CODED PATTERNS REPRESENTING RESPECTIVE ONES OF SAID CHARACTERS, SAID MARKS BEING LOCATED IN A SINGLE LINE EXTENDING ALONG THE LENGTH OF SAID SECOND COLUMN, A SECOND SOURCE OF RADIANT ENERGY ADJACENT ONE OF SAID SURFACES OF SAID MEMBER AND IN ALIGNMENT WITH SAID SECOND COLUMN, RADIANT ENERGY SENSING DEVICES LOCATED IN A LINE EXTENDING ALONG THE LENGTH OF SAID SECOND COLUMN ADJACENT THE OTHER OF SAID SURFACES, MEANS RESPONSIVE TO SIMULTANEOUS SENSING OF A PATTERN OF SAID MARKS BY CERTAIN OF SAID SENSING DEVICES FOR APPLYING INPUT SIGNALS TO RESPONSIVE ONES OF SAID FIRST SET OF INPUTS, AND MEANS FOR ENERGIZING SAID SECOND SOURCE WHEN EACH OF SAID CHARACTERS PASSES ADJACENT SAID PHOTOSENSITIVE MEDIUM.