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:
Mar. 22, 1994
Filed:
Feb. 05, 1992
Applicant:
Inventors:
Walter S Friauf, Bethesda, MD (US);
Thomas R Clem, Sr, Silver Spring, MD (US);
Robert L Berger, Bethesda, MD (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G06F / ;
U.S. Cl.
CPC ...
374170 ; 36457103 ; 36457104 ; 374 10 ; 374114 ; 374171 ;
Abstract
A high resolution digital thermometer capable of measuring temperature differences on the order of several micro-degrees centigrade. The device includes a bridge circuit having two thermistors in series. An output of the bridge circuit feeds a signal to an analog-to-digital convertor via a high gain amplifier. A computer maintains the balance of the bridge circuit to avoid a situation wherein the range of the analog-to-digital convertor would be exceeded.