Contact probe

Details Contact probe Contact probe

1992-09-02

1994-03-01

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324158F, G01R 1073, G01R 3102

Patent

active

052911292

ABSTRACT:
A contact probe, comprising: an electroconductive needle member; a tubular holder slidable receiving the needle member; a compression coil spring fitted on the needle member in the tubular holder to urge the needle member so as to project a forward end of the needle member from one end of the tubular holder; a stopper arrangement for restricting the extent to which the forward end of the needle member projects from the one end of the tubular holder; and a lead wire preferably continuous and integral with the needle member for electrically connecting the needle member to an external circuit. Owing to the use of the compression coil spring which may extend substantially the entire length of the contact probe, a favorable spring property can be obtained. The use of the compression coil spring surrounding the needle member permits generation of a large spring force, and the outer diameter of the contact probe is not required to be increased.

REFERENCES:
patent: 4138643 (1979-02-01), Beck et al.
patent: 4658212 (1987-04-01), Ozawa et al.
patent: 4659987 (1987-04-01), Coe et al.
patent: 4837507 (1989-06-01), Hechtman
patent: 4841240 (1989-06-01), Hsue et al.

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