Boots – shoes – and leggings
Patent
1996-06-28
1998-11-17
Gordon, Paul P.
Boots, shoes, and leggings
36446824, 73814, G06F 1900
Patent
active
058385681
ABSTRACT:
An apparatus and method provides a testing process and a machine for implementing a testing process to produce failures on a heated circuit card. The apparatus and method applies a controlled, repeatable shear stress to the joints between a circuit board and its mounted components. The circuit board is heated, and one end is twisted with respect to a second end to produce stresses within the circuit board simulating those imposed on components due to thermal cycling. The apparatus may be computer controlled, for regulating the twisting of the circuit board to produce a precise twist angle during a cyclic twisting of the heated circuit board. Electrical resistance of critical joints may be monitored during the testing, and a data base compiled identifying the cycle count at which a failure occurs and location of the failure on the circuit board.
REFERENCES:
patent: 3381526 (1968-05-01), Rastogi et al.
patent: 3665751 (1972-05-01), Paine et al.
patent: 3910105 (1975-10-01), Hoffstedt
patent: 4003247 (1977-01-01), Moser et al.
patent: 4567774 (1986-02-01), Manahan et al.
patent: 4696104 (1987-09-01), Vanzetti et al.
patent: 4777829 (1988-10-01), Fleischman
patent: 4809308 (1989-02-01), Adams et al.
patent: 4895027 (1990-01-01), Manahan, Sr.
patent: 4958522 (1990-09-01), McKinlay
patent: 5079955 (1992-01-01), Eberhardt
patent: 5184517 (1993-02-01), Kelzer
patent: 5447072 (1995-09-01), Holung
patent: 5471877 (1995-12-01), Brown
patent: 5567884 (1996-10-01), Dickinson et al.
Dickinson Gerard Truman
McGinniss, Jr. James Lee
Tokarz Ronald F.
Zubelewicz Aleksander
Garland Steven R.
Gordon Paul P.
International Business Machines - Corporation
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