Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1975-06-30
1977-08-09
Corcoran, Robert J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
73 678S, G01R 3312
Patent
active
040413799
ABSTRACT:
Apparatus for non-destructive testing of metal blanks, in particular steel slabs, flat steel, billets or blooms, for defects such as cracks, seams, cavities, bubbles or the like disposed at or near the surface comprising one or more inspecting heads movable relatively to the surface of the test objects and provided with inspecting means for detecting such defects, said inspecting heads being held by means of pressure and tension members which are carried by a common support arm and transmit the pressure and tension forces substantially separately from each other so as to be individually movable up and down perpendicularly to the slab surface and constrained to move in the travelling direction in engagement with the slab surface.
REFERENCES:
patent: 3234457 (1966-02-01), Sower et al.
patent: 3447074 (1969-05-01), Sower et al.
patent: 3460028 (1969-08-01), Beaver et al.
patent: 3899734 (1975-08-01), Beaver et al.
Nakaoka et al.; Billet Automatic Inspection Machine; Shimadzu Rev. (Japan); vol. 28, No. 4 (1971); pp. 17-22.
Corcoran Robert J.
Granges Oxelosunds Jarnverk AB
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