Modular test fixture for vibration and shock testing

Details Modular test fixture for vibration and shock testing Modular test fixture for vibration and shock testing

1988-12-05

1990-04-03

Levy, Stewart J.

Measuring and testing

Vibration

Vibrator

G01N 2900

Patent

active

049129805

ABSTRACT:
A modular test fixture for use in vibration and shock testing of printed circuit cards comprises a plurality of separate generally planar card-mounting plates each having a two-dimensional array of uniformly spaced apart mounting holes within a rectangular rigid outer frame extending around the outer boundary of each plate. Printed circuit cards of varying sizes are affixed to the mounting plate by clamps positioned along opposite edges of each card, with spaced apart fasteners along each clamp being aligned with and fastened to preselected mounting holes on the plate. The individual card-mounting plates, with the circuit cards attached thereto, are stacked together to form a rigid multi-layer fixture sufficient for vibration and shock testing of the circuit cards mounted at different levels within the fixture. The resulting fixture is fastened to an external shaker for imparting shock and vibration loads to the fixture for use in testing the circuit cards for screening and solder joint defects.

REFERENCES:
patent: 3670563 (1972-06-01), Light
patent: 4603587 (1986-08-01), Kimball et al.
patent: 4735089 (1988-04-01), Baker et al.

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