Measuring and testing – Dynamometers – Responsive to force
Reexamination Certificate
2006-02-21
2009-11-24
Caputo, Lisa M (Department: 2855)
Measuring and testing
Dynamometers
Responsive to force
Reexamination Certificate
active
07621190
ABSTRACT:
A technique of monitoring strain on a printed circuit board assembly involves the use of a strain detector mounted on a printed circuit board. The strain detector is formed of a non-ductile material. The strain detector has a narrowed portion forming a weak link that has a characteristic of breaking when a critical strain limit is exceeded. The method of monitoring can include visual or electrical inspection. The electrical inspection can include having a strain monitoring device. The strain monitoring device has a timer connected to at least one strain detector and a memory for storing results connected to the timer. The capacitance of at least one of the strain detectors is sampled and any change in capacitance is recorded to the memory. In one embodiment, a time stamp occurs in the memory based on when an electrical property changes across at least one of the strain detectors.
REFERENCES:
patent: 3626256 (1971-12-01), Brown
patent: 4104605 (1978-08-01), Boudreaux et al.
patent: 4179940 (1979-12-01), Oertle et al.
patent: 4875533 (1989-10-01), Mihara et al.
patent: 4939496 (1990-07-01), Destannes
patent: 5154247 (1992-10-01), Nishimura et al.
patent: 5306873 (1994-04-01), Suzuki et al.
patent: 5508676 (1996-04-01), Grange et al.
patent: 5526208 (1996-06-01), Hatch et al.
patent: 5539674 (1996-07-01), Barbier et al.
patent: 5675089 (1997-10-01), Hawkins
patent: 5969260 (1999-10-01), Belk et al.
patent: 6201220 (2001-03-01), Leturia Mendieta
patent: 6451187 (2002-09-01), Suzuki et al.
patent: 6504114 (2003-01-01), Lockery et al.
patent: 6647797 (2003-11-01), Miodushevsky
patent: 6948377 (2005-09-01), Wingett et al.
patent: 7036387 (2006-05-01), Ong et al.
patent: 7094061 (2006-08-01), Kieffer et al.
patent: 7096748 (2006-08-01), Kutlu
patent: 7104138 (2006-09-01), Otobe et al.
patent: 2007/0151358 (2007-07-01), Chien et al.
Ahmad Mudasir
Teng Sue
BainwoodHuang
Caputo Lisa M
Cisco Technology Inc.
Kirkland, III Freddie
LandOfFree
Method and apparatus for strain monitoring of printed... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for strain monitoring of printed..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for strain monitoring of printed... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4137505