Electricity: measuring and testing – Magnetic – Magnetic test structure elements
Patent
1992-05-26
1994-06-14
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Magnetic test structure elements
324240, G01N 2783, G01R 3312
Patent
active
053213564
ABSTRACT:
A magnetic inspection device for non-destructively testing elongated objects such as large diameter wire cables is constructed with a number of flux carrying components that are assembled and disassembled in sections with a magnetic flux detector for detecting the loss of metallic cross-section and local discontinuities in the cable. The inspection device is moved bodily along a cable during the inspection process and in another embodiment the flux detector itself is the only component movable along the cable. Jack screws are utilized to mechanically separate or bring together the flux carrying components which are normally attracted to one another by powerful magnetic forces. Draw screws are also employed to pull together flux carrying components which are naturally repulsed from one another by the magnetic forces. Alignment pins are utilized to guide the components together in predetermined positional relationships during assembly processes.
REFERENCES:
patent: 4427940 (1984-01-01), Hirama et al.
patent: 4546316 (1985-10-01), Lang
patent: 4659991 (1987-04-01), Weischedel
patent: 4827215 (1989-05-01), van der Walt
TRI Report 90328-D69, pp. 2,4 and 5, May 1989.
Development of a New Nondestructive Inspection System for Bridge Structures, Matzkin et al. (TRI), May 11-13, 1992.
Mechanische Grossen elektrisch messen, SPR=Seilprufgerat fur Drahtseile bis 160 by Dr. Brandt GmbH and translation, (No Month) 1983.
Edmonds Warren S.
NDT Technologies, Inc.
Strecker Gerard R.
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