Geometrical instruments
Patent
1976-04-07
1977-09-13
McGlynn, Joseph H.
Geometrical instruments
324158F, 339 74R, 339 75MP, H05K 114
Patent
active
040477800
ABSTRACT:
A plurality of elongated bridging contacts each extending in a first direction are mounted on a pair of support blocks that are driven in a symmetrical, reciprocating motion between first and second limit positions. In the first position each contact makes electrical connection at one end with a lead of a semiconductor device to be tested and at the other end with a contact pin that is connected directly to a load board. The contacts are preferably pivotable to a limited degree about a point intermediate the contacting ends and flex slightly when in the first position to develop a good contact force. In the second position the contacts are spaced from the leads and the pins. Driving means for the support blocks, as well as the support blocks themselves, are structured to provide a minimum separation along the first direction between the load board and the device (preferably less than 25 millimeters) and an unrestricted mating plane for the load board. In a preferred form, the support blocks mount on a pair of opposed cross heads which in turn mount on a pair of slidable rods. The symmetrical, reciprocating motion is generated by spring means that urges the cross heads together and cam means, acting through a pivoted arm linked to both slide rods, that urge the cross heads apart.
REFERENCES:
patent: 3715662 (1973-02-01), Richelmann
patent: 3763459 (1973-10-01), Millis
patent: 3891898 (1975-06-01), Damon
Ross, "Test Socket", IBM Technical Disclosure Bulletin, vol. 10, No. 5, Oct. 1967, p. 549.
Bicks Mark S.
McGlynn Joseph H.
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