Temperature control system

Claim 1

A TEMPERATURE CONTROLLED CHROMATOGRAPHIC ANALYZER COMPRISING A HOLLOW MEMBER OF HEAT CONDUCTING MATERIAL HAVING FIRST AND SECOND OPEN ENDS, HEAT INSULATING MEANS SURROUNDING SAID HOLLOW MEMBER, A FIRST END MEMBER OF HEAT CONDUCTING MATERIAL SECURED TO SAID HOLLOW MEMBER OVER SAID FIRST OPEN END, A SECOND END MEMBER OF HEAT CONDUCTING MATERIAL SECURED TO SAID HOLLOW MEMBER OVER SAID SECOND OPEN END, AN INNER MEMBER OF HEAT CONDUCTING MATERIAL HAVING A CROSS-SECTIONAL AREA LESS THAN THE CROSSSECTIONAL AREA OF SAID HOLLOW MEMBER, SAID INNER MEMBER BEING POSITIONED WITHIN SAID HOLLOW MEMBER AND SUBSTANTIALLY COAXIAL THEREWITH, ONE END OF SAID INNER MEMBER BEING SECURED TO SAID FIRST END MEMBER, A PELTIER EFFECT THERMOELECTRIC DEVICE HAVING A FIRST SIDE AND A SECOND SIDE, SAID SECOND SIDE BEING POSITIONED IN HEAT EXCHANGING RELATIONSHIP WITH SAID FIRST END MEMBER, MEANS FOR PASSING A FLUID IN HEAT EXCHANGING RELATIONSHIP WITH SAID FIRST SIDE OF SAID THERMOELECTRIC DEVICE, A CHROMATOGRAPHIC COLUMN POSITIONED WITHIN SAID HOLLOW MEMBER, MEANS FOR INTRODUCING A SAMPLE INTO SAID CHROMATOGRAPHIC COLUMN, MEANS OPERATIVELY ASSOCIATED WITH SAID CHROMATOGRAPHIC COLUMN FOR PRODUCING A SIGNAL REPRESENTATIVE OF A PROPERTY OF SAID SAMPLE, MEANS FOR PASSING AN ELECTRICAL CURRENT THROUGH SAID THERMOELECTRIC DEVICE, MEANS FOR DETERMINING THE TEMPERATURE OF SAID CHROMATOGRAPHIC COLUMN, MEANS RESPONSIVE TO SAID MEANS FOR DETERMINING FOR CONTROLLING THE AMOUNT AND DIRECTION OF CURRENT WHICH IS PASSED THROUGH SAID THERMOELECTRIC DEVICE.