Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1976-12-17
1978-06-13
Corcoran, Robert J.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
G01R 3312
Patent
active
040951812
ABSTRACT:
An eddy current probe for detecting cracks in metal skins and adjacent fastener holes which includes first and second coils wound about first and second vertically stacked ferromagnetic core members which members are held in alignment by an associated optically clear shoe member centered by a centering ring, rotation of the shoe within the centering ring permitting inspection of the entire circumference of a fastener hole.
REFERENCES:
patent: 2557029 (1951-06-01), Griffin
patent: 3449664 (1969-06-01), Smith
patent: 3480367 (1969-11-01), Husted et al.
patent: 3611119 (1971-10-01), Madewell et al.
Harris Walter Jefferson
Neufeld Ronald Murray
Anderson Daniel T.
Corcoran Robert J.
Donahue B. A.
Gardner Conrad O.
The Boeing Company
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