Carriage mounted apparatus for detecting surface defects in flat

Details Carriage mounted apparatus for detecting surface defects in flat Carriage mounted apparatus for detecting surface defects in flat

1981-01-21

1983-10-11

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetic test structure elements

G01N 2790, G01R 3312

Patent

active

044095490

ABSTRACT:
The invention concerns apparatus for inspecting the flat surfaces of a metal billet and includes a carriage mounted scanning head having a high frequency eddy-current probe (21) mounted on the periphery of a disc (18) rotatable above the billet surface about an axis perpendicular to said surface. The carriage (1) is located in abroad of the rotating scanning head. The eddy-current probe is connected to transmit electrical signals representative of the condition of the billet surface under inspection to signal processing equipment remote from the apparatus.

REFERENCES:
patent: 3109139 (1963-10-01), Branker
patent: 3449664 (1969-06-01), Smith
patent: 3974442 (1976-08-01), Savidge et al.

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