Device for cooling the specimen in X-ray diffraction apparatus

Claim 1

APPARATUS FOR CONTROLLABLY VARYING THE TEMPERATURE OF A SPECIMEN; SAID APPARATUS COMPRISING SUPPORT MEANS OF THERMALLY CONDUCTIVE MATERIAL FOR SUPPORTING SAID SPECIMEN, HEATING MEANS OPERATIVELY ASSOCIATED WITH SAID SUPPORT MEANS FOR CONTROLLABLY HEATING THE LATTER AND THEREBY SAID SPECIMEN, COOLING MEANS ADAPTED FOR LOWERING THE TEMPERATURE OF SAID SPECIMEN, AND CONNECTING MEANS CONNECTING SAID COOLING MEANS TO SAID SUPPORT MEANS FOR REMOVING HEAT FROM THE LATTER AND THEREBY FROM SAID SPECIMEN, SAID CONNECTING MEANS INCLUDING MEANS BETWEEN SAID SUPPORT MEANS AND COOLING MEANS AND HAVING A THERMAL CONDUCTIVITY WHICH VARIES IN RESPONSE TO HEAT GENERATED BY SAID HEATING MEANS, THE LATTER MEANS COMPRISING A TUBE OF THERMALLY CONDUCTIVE MATERIAL FROM WHICH IS SUSPENDED SAID SUPPORT MEANS, A FLOAT OF THERMALLY CONDUCTIVE MATERIAL DISPLACEABLE IN SAID TUBE AWAY FROM SAID SUPPORT MEANS, AND A FLUID IN SAID TUBE BENEATH SAID FLOAT AND ADAPTED FOR BEING VAPORIZED BY HEAT APPLIED TO THE FLUID FOR RAISING THE FLOAT IN THE TUBE TO MODIFY THE COMBINED HEAT CONDUCTIVITY OF THE FLOAT AND TUBE.