Geometrical instruments
Patent
1984-10-01
1987-02-17
McQuade, John
Geometrical instruments
339 75M, 339117P, 339255R, H01R 909
Patent
active
046435018
ABSTRACT:
A fixture to support an electronic board and to be connected to a tester for testing the electronic board. The fixture has a fixed support, a vertically movable first carrier on the fixed support mounting an electronic board, a vacuum chamber for moving the first carrier, spring means for vertically moving the first carrier away from the fixed support, a second carrier mounted on the first carrier for vertical motion, a vacuum chamber for moving the second carrier relative to the first carrier downwardly toward the fixed support, and spring means connected between said first and second carriers for moving the second carrier relative to the first carrier upwardly away from the fixed support.
REFERENCES:
patent: 4344033 (1982-08-01), Stowers et al.
patent: 4357062 (1982-11-01), Everett
patent: 4357575 (1982-11-01), Uren et al.
McQuade John
Olsson Frederick J.
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