Assembly suitable for life testing a multi-dimensional force tra

Details Assembly suitable for life testing a multi-dimensional force tra Assembly suitable for life testing a multi-dimensional force tra

1994-10-28

1996-08-13

Williams, Hezron E.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

73811, G01N 332

Patent

active

055445306

ABSTRACT:
A test assembly suitable for life testing a computer pointing stick includes a rigid shaft that is rotated by a motor and a mounting mechanism for holding and positioning the pointing stick under test in a coaxial relationship with the rigid shaft. A cantilever spring arm is rigidly connected at one end to the rigid shaft so that it rotates with the rigid shaft and is mechanically coupled under lateral spring tension at its other end to the pointing stick. The spring rotates with the rigid shaft and applies lateral force to the pointing stick via a collar attached to the pointing stick, the direction of the applied force rotating with the rigid shaft and cantilever spring. A counter records the cumulative number of flexure cycles required to make the pointing stick functionally fail.

REFERENCES:
patent: 2789427 (1957-04-01), Brier
patent: 3585840 (1969-09-01), Landsness
patent: 5020357 (1991-06-01), Kovacevic et al.

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