Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1983-09-08
1986-01-14
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324202, 324236, G01B 710, G01R 3312, G01R 3500, G01N 2772
Patent
active
045648107
ABSTRACT:
A system for measuring the cladding thickness on aluminum sheets which includes a cylindrical probe holder with four evenly spaced contact points surrounding a low temperature coefficient torroidal ferrite core which provides a signal to an aluminum cladding thickness signal processing circuit comprising a crystal oscillator, low drift detector, and push button calibration instrument portion thereby enabling drift free repeatable measurements.
REFERENCES:
patent: 2933677 (1960-04-01), Lieber
patent: 3495196 (1970-02-01), Lorenzi et al.
patent: 4247818 (1981-01-01), Hiroshima et al.
Chau Albert W.
Geithman Glenn A.
DeVogel Nicolaas
Donahue Bernard A.
Gardner Conrad O.
Snow Walter E.
Strecker Gerard R.
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