Geometrical instruments
Patent
1977-12-23
1978-12-19
Abrams, Neil
Geometrical instruments
339182R, 339252P, H01R 2900
Patent
active
041303288
ABSTRACT:
An electrical programming assembly includes two or more printed circuit boards stacked one above another plus contact pins which connect the printed circuit boards at the various levels with one another. Each printed circuit board includes columns and rows of apertures which are disposed at precisely defined locations. Each aperture includes a metallic cladding around its rim. The contact pins connecting the various levels of the printed circuit boards generally include an elongated, nonconductive hollow shell member having a body portion and a probe portion for insertion into an aperture of the printed circuit board. The probe portion includes a plurality of spaced apart through slots. The contact pin further includes a plurality of conductive resilient contacts which are disposed within the probe member. Each contact is substantially diamond shaped in configuration having spaced apart corner members. The contacts are disposed at a predetermined angle relative to each other the angle being equal to or less than 90.degree. but large enough to avoid electrical interference among the contacts. The corner members of the contact are received in and protrude through the through slots of the probe member and make contact with the metallic cladding of the printed circuit board apertures.
REFERENCES:
patent: 3284757 (1966-11-01), Krone
patent: 3335388 (1967-08-01), Karol
Abrams Neil
Calvaruso Joseph A.
Casella Anthony J.
Sealectro Corporation
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