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:
Apr. 28, 1998
Filed:
Feb. 25, 1997
Applicant:
Inventors:
Wayne Meredith Latham, Forest, VA (US);
Jimmy Wade Hancock, Lynchburg, VA (US);
Jayne Marie Grut, Madison Heights, VA (US);
Assignee:
McDermott Technology, Inc., New Orleans, LA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01B / ; G01B / ; G01N / ;
U.S. Cl.
CPC ...
32420716 ; 165 112 ; 324202 ; 32420722 ; 324220 ; 324229 ;
Abstract
A method of electromagnetically measuring the distance between adjacent tube elements in a heat exchanger. A cylindrical, high magnetic permeability ferrite slug is placed in the tube adjacent the spacing to be measured. A bobbin or annular coil type probe operated in the absolute mode is inserted into a second tube adjacent the spacing to be measured. From prior calibrations on the response of the eddy current coil, the signals from the coil, when sensing the presence of the ferrite slug, are used to determine the spacing between the tubes.