Pyrolyzer for gas chromatog-raphy apparatus

Claim 1

IN A DEVICE FOR ANLYZING MATERIALS, A HEATING CHAMBER, MEANS TO CONNECT SAID HEATING CHAMBER INTO A GAS FLOW STREAM, A HEATING COIL MOUNTED IN SAID CHAMBER, A SAMPLE CONTAINER IN SAID CHAMBER IN HEAT-RECEIVING RELATION TO SAID COIL, A SOURCE OF HEATING CURRENT, MEANS CONNECTING SAID CURRENT SOURCE TO SAID COIL AND INCLUDING A NORMALLY OPEN SWITCH, A CAM DISC NORMALLY IN A PREDETERMINED POSITION, A REALY, MEANS CLOSING SAID SWITCH RESPONSIVE TO ENERGIZATION OF SAID RELAY, PHOTO-SENSITIVE MEANS, MEANS ENERGIZING SAID RELAY RESPONSIVE TO IRRADIATION OF SAID PHOTO-SENSTIVE MEANS, A LIGHT SOURCE ADJACENT SAID PHOTO-SENSITIVE MEANS, A MASKING MEMBER ROTATABLY MOUNTED BETWEEN THE LIGHT SOURCE AND SAID PHOTO-SENSITIVE MEANS, SAID MASKING MEMBER HAVING AN ARCUATE SLOT AT THE SAME RADIAL DISTANCE FROM ITS ACXIS OF ROTATION AS THE OPTICAL PATH BETWEEN THE LIGHT SOURCE AND THE PHOTOSENSITIVE MEANS, MEANS DRIVINGLY CONNECTED SAID MASKING MEMBER TO SAID CAM DISC, WHEREBY THE PHOTO-SENSTIVE MEANS IS IRRADIATED WHEN THE LEADING END OF SAID SLOT REACHES SAID OPTICAL PATH AND IS NO LONGER IRRADIATED WHEN THE TRAILING END OF SAID SLOT REACHES SAID OPTICAL PATH, A DRIVING MOTOR CONNECTED TO SAID CAM DISC, MANUALLY OPERATED MEANS TO ENERGIZE SAID MOTOR WHEN THE DISC IS IN SAID PREDETERMINED POSITION, AND MEANS TO MAINTAIN SAID MOTOR ENERGIZED UNTIL THE DISC COMPLETS ONE REVOLUTION AND AGAIN REACHES SAID PREDETERMINED POSITION.