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:
Oct. 17, 1989
Filed:
Oct. 25, 1988
Applicant:
Inventors:
Horst Ziegler, Paderborn, DE;
Horst Behlen, Paderborn-Dahl, DE;
Assignee:
W. C. Heraeus GmbH, Hanau, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01K / ; G01K / ;
U.S. Cl.
CPC ...
374117 ; 374184 ; 331 66 ; 331 68 ; 336D / ;
Abstract
An electronic thermometer has an oscillator, the frequency determining element of which is a temperature sensitive piezoelectric element (2), used as a measuring sensor, which is located inside a sealed housing (3). The piezoelectric element is provided with two termial electrodes (4, 5) which are galvanically separated from the oscillator circuit bia an inductively coupled pair of coils (6, 7); the coil (6) connected to the terminal electrodes is tightly encompassed by the housing. An evaluation unit (10) for detecting the temperature is connected to the oscillator circuit.