The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 13, 1981
Filed:
Mar. 09, 1979
John J Staunton, Oak Park, IL (US);
The Perkin-Elmer Corporation, Norwalk, CT (US);
Abstract
An improved melting point temperature standard includes a well for receiving a temperature sensor to be calibrated. Surrounding the well is a cell with a crystalline material therein. A thermally conductive spacer contacts the outer cell walls. A thermal barrier contacts the spacer and a second thermally conductive member encircles the barrier. A heating/cooling element contacts the second thermally conductive member to apply heat or to cool it. Thermistors in the second thermally conducive member and the spacer are used by a control circuit to adjust the heat flow into the cell so that the crystalline material melts over a period of 7 to 8 hours making use of the temperature standard possible for many hours.