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:
Jun. 20, 1989
Filed:
Feb. 08, 1988
Applicant:
Inventor:
Karl T Kummer, Doylestown, PA (US);
Assignee:
Honeywell Inc., Minneapolis, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340653 ; 324537 ;
Abstract
In a process control network, apparatus and method for periodic testing of a thermocouple element includes a switching mechanism that inserts a circuit with known parameters in series with the thermocouple. Voltages levels with and without the inserted circuit are compared and used to identify a failed or failing thermocouple.
Kummer, Karl. (1989). Apparatus and method for detection of an open thermocouple in a process (U.S. Patent No. 4841286). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4841286
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