Torsional tester for circuit cards

Details Torsional tester for circuit cards Torsional tester for circuit cards

1994-07-27

1995-09-05

Chilcot, Jr., Richard E.

Measuring and testing

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

By loading of specimen

73853, 73854, G01N 322

Patent

active

054470722

ABSTRACT:
A torsional tester includes test stations for one or more circuit cards. In each test station, one end of the circuit card under test is held stationary while the opposite end is twisted in a card holder mounted to pivot about an axis, being alternately driven by each of a pair of weights extending downward on a flexible member from opposite sides of a pulley. A rocker providing a platform extending under each of these weights is driven in a reciprocating pivoting motion in which the weights are alternately lifted and allowed to fall. The weight which is allowed to fall provides a torque to the pulley, while the weight being lifted does not provide such a torque. A pair of setscrews limits the angular motion of the card holder to a predetermined level in each direction.

REFERENCES:
patent: 4958522 (1990-09-01), McKinlay
patent: 5174160 (1992-12-01), Morita et al.
PCMCIA PC Card Standard, Release 2.0, Sep., 1991, Personal Computer Memory Card International Association, Sunnyvale, Calif., pp. 3-12, 3-24.

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