Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1993-11-23
1995-10-24
Nguyen, Vinh P.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
324755, G01R 104, H01R 909
Patent
active
054613230
ABSTRACT:
Disclosed are improved method and apparatus for testing printed circuit board in which method and apparatus a selected printed circuit board is stretched to be unbent, thus permitting measuring probes to come to contact to selected points on the printed circuit board exactly for measuring, thus preventing undesired deviations of selected measuring points caused by the bending of the printed circuit board in hitting selected measuring points by probes. The printed circuit board tester includes a pair of clamps for gripping the opposite lateral edges of the printed circuit board standing upright; a drive devices for driving the clamps close to or apart from each other; and stretch control device between the drive devices and one of the clamps for applying a controlled stretch to the printed circuit board.
REFERENCES:
patent: 4818933 (1989-04-01), Kerschner et al.
patent: 5107206 (1992-04-01), Yanagi et al.
patent: 5153504 (1992-10-01), Bonnet et al.
patent: 5214374 (1993-05-01), St. Onge
Nakazawa Touji
Yanagi Kunio
Nguyen Vinh P.
Tescon Co., Ltd.
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