Vacuum-actuated test fixture for printed circuit boards

Details Vacuum-actuated test fixture for printed circuit boards Vacuum-actuated test fixture for printed circuit boards

1980-09-12

1982-08-10

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324 73PC, 324158P, 339117P, G01R 3102, G01R 1512

Patent

active

043440339

ABSTRACT:
For in-circuit and functional testing of loaded printed circuit boards with speed and precision, a vacuum-actuated test fixture utilizes a yielding diaphragm assembly with rigid frame and spring-loaded diaphragm base plate, to distribute downward atmospheric pressure evenly over the entire area of the board without localized stress concentrations. A captive removable diaphragm frame and quick-acting spring-loaded cam latches assure a positive seal around the margin of the diaphragm assembly and along top and bottom edge portions thereof. Ease of assembly and disassembly is promoted. A plug-in vacuum adapter with manual valve provides quick hook-up of the test fixture to a vacuum source. A lower base frame and patchboard assembly allow efficient interfacing of the text fixture with a suitable receiver frame of test apparatus.

REFERENCES:
patent: 4017793 (1977-04-01), Haines
patent: 4321533 (1982-03-01), Matrone

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