Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Patent
1973-06-12
1976-02-10
Woodiel, Donald O.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
73 677, G01N 2904
Patent
active
039370658
ABSTRACT:
To detect the presence of certain types of hidden flaws within a material having an exposed surface, the surface is tapped at one location to produce sonic vibrations within the material. At another location, an acoustic receiving transducer is coupled to the surface of the material being tested. A characteristic of the electrical signals produced by the transducer which is indicative of the type of flaw to be detected is utilized to denote the presence of a flaw. A mobile foorm of apparatus which detects flaws while traversing the surface of the material and which indicates the location as well as the existence of the flaws is described.
REFERENCES:
patent: 3224253 (1965-12-01), McKay
patent: 3361225 (1968-01-01), Nichols
patent: 3531983 (1972-10-01), Heath et al.
patent: 3550434 (1970-12-01), Schroeer et al.
patent: 3564903 (1971-02-01), Woodmansee et al.
patent: 3631714 (1972-01-01), Cressman
Milberger Lionel J.
Moore William M.
Swift Gilbert
Kreitman Stephen A.
Moore William
Swift G.
Woodiel Donald O.
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