Method and apparatus for detecting flaws of a seam in a shielded

Details Method and apparatus for detecting flaws of a seam in a shielded Method and apparatus for detecting flaws of a seam in a shielded

1994-08-01

1995-12-19

Regan, Maura K.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

174 35MS, G01R 2726

Patent

active

054771579

ABSTRACT:
Flaws in a seam of a shielded enclosure are detected by forcing a current to flow over the shielded enclosure and the seam. A small portable, hand held, compact device is placed over the seam. The device has a high impedance path which forces current to flow over the shielded enclosure and the seam. Two electrodes are resiliently pressed towards the shielded enclosure. The current flowing across the seam produces a voltage which the first and second electrodes and a detector use to detect flaws in the seam.

REFERENCES:
patent: 3599095 (1971-08-01), Johnson
patent: 3611125 (1971-10-01), Sharon et al.
patent: 3995213 (1976-11-01), Robinson et al.
patent: 4789829 (1988-12-01), Stribling
patent: 4888546 (1989-12-01), Berry et al.
patent: 5061899 (1991-10-01), Kudo
patent: 5153524 (1992-10-01), McCormack
"A New Apparatus for Detecting Flaws of a Seam in a Shielded Enclosure", by ee, IEEE 1993 International Symposium on Electromagnetic Compatability, Aug. 9-13, Dallas, Texas.
IBM Technical Disclosure Bulletin vol. 17, No. 7, Dec. 1974 Anderson et al. Portable Resistance Gage.
IEEE Transactions vol. EMC12, No. 1 Feb. 1970 Jarva Shielding Tests for Cables and Small Enclosures.

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