Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1981-05-08
1984-03-27
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
340703, 340715, G01N 2772, G01R 3312, G09F 930
Patent
active
044397305
ABSTRACT:
Method and apparatus for nondestructively testing each incremental area of a ferromagnetic sample by first passing a steady magnetic flux field through an area in a first direction and producing an inspection signal in response thereto, and then passing a steady magnetic flux field through the same area in an orthogonal direction and producing a second inspection signal in response thereto. The magnitudes of the two inspection signals corresponding to a given incremental area are added to produce a composite signal whose magnitude is the sum of the two signals. The composite signal associated with a given incremental region is displayed on a visual presentation means at a location corresponding to the location of the incremental region on the ferromagnetic sample and with an indicia, such as color, that is a function of the magnitude of the respective composite signal.
REFERENCES:
patent: 3582771 (1971-06-01), Placke
patent: 3612987 (1971-10-01), Placke et al.
patent: 3849793 (1974-11-01), Ablett
patent: 3906357 (1975-09-01), Runshang
patent: 4016544 (1977-04-01), Morita et al.
patent: 4020501 (1977-04-01), Hillberger et al.
patent: 4379292 (1983-04-01), Minato et al.
AMF Inc.
Dougherty David E.
Edmonds Warren S.
Gallagher John H.
Strecker Gerard R.
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