Thermochromic temperature indication
Abstract
Abstract TEMPERATURE SENSING DEVICES AND THERMOMETERS SUCH AS SOLID FLEXIBLE STRIPS EMPLOY REVERSIBLE SOLID THERMOCHROMIC MATERIALS. TEMPERATURE SENSING DEVICES EXPOSE TO VIEW A CONTINUOUS LENGTH OF SOLID MATERIAL WHICH REVERSIBLY CHANGES COLOR WHILE SOLID, THE COMPOSITION AND HENCE THE TRANSITION TEMPERATURE GRADUALLY VARYING ALONG THE LENGTH. COMPOUNDS OF THE SAME INGREDIENTS WITH PROPORTIONS VARYING ALONG THE LENGTH ARE DISCLOSED, ILLUSTRATED BY X2HGI4 WHERE X2 COMPRISES MORE THAN OINE METAL IN VARYING PROPORTIONS. THE DEVICES EMPLOYING FLEXIBLE SUBSTRATES ARE AFFIXABLE TO NUMEROUS SURFACES, INCLUDING LABELS ON MERCHANDISE AND THE HUMAN BODY. MOETHODS FOR PRODUCTION EMPLOY FLOAT ZONE TECHNIQUES AND DEPOSITION, E.G., BY PRINTING OR VAPOR CONDENSATION.
Inventors
- 👤 Joseph R M Seitz
Bibliographic Details
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