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. 15, 2004
Filed:
Jul. 25, 2003
Applicant:
Inventor:
Anthony M. Faust, Lombard, IL (US);
Assignee:
Maghetrol International Incorporated, Downers Grove, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01S 1/308 ;
U.S. Cl.
CPC ...
G01S 1/308 ;
Abstract
A process instrument comprises a housing, a terminal in the housing for connection to a two-wire process loop and an active element for sensing a characteristic of a process. A control circuit is disposed between the terminal and the active element for measuring the sensed characteristic and controlling the two-wire process loop responsive to the sensed characteristic. A split intrinsic safety barrier comprises current limiters electrically connected between the terminal and the control circuit and a diode safety barrier electrically connected between the control circuit and the active element.