Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1987-04-10
1989-01-31
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324 73PC, 324158P, G01R 1067, G01R 104
Patent
active
048018767
ABSTRACT:
A printed wiring board tester which comprises first and second fixture members disposed in spaced-apart, substantially parallel relationship with respect to each other, a plurality of probe pins disposed between the first and second fixture members, and slidably extending therethrough, the probe pins comprising a first pin element having a large diameter section connected with a small diameter section by a stepped portion, the larger diameter section having a free end which is provided for engagement with the terminal area of a printed wiring board to be tested, a cylindrical second pin element divided into large and small diameter sections, the larger diameter section slidably fitting over the small diameter section of the first pin element with the end thereof defining a stopper jaw which engages the stopped portion, and a cord connecting element extending into and connected to the small diameter section of the second pin element, and a third pin element comprising a coiled spring member which is loosely fitted around the periphery of the second pin portion and disposed between said first and second fixture members, one end of the spring member engaging the stopper jaw of the second pin element and the other end thereof engaging the fixture member, said coiled spring member imparting a bias to the first pin element to ensure that it is in positive contact with the terminal area of the printed wiring board.
REFERENCES:
patent: 3676776 (1972-07-01), Bauer et al.
patent: 4050762 (1977-09-01), Hines et al.
patent: 4138643 (1979-02-01), Beck et al.
patent: 4200351 (1980-04-01), Long et al.
patent: 4321532 (1982-03-01), Luna
patent: 4357062 (1982-11-01), Everett
patent: 4658212 (1987-04-01), Ozawa et al.
patent: 4659987 (1987-04-01), Col et al.
"Tester contact Method", by Kappel et al., IBM Tech. Disc. Bull., vol. 21, #9, 2/79, p. 3742.
European Search Report, EP87 303409; 6/30/87.
Burns W.
Eisenzopf Reinhard J.
Sagami Tsushin Kogyo Kabushiki Kaisha
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