H - Electricity – 05 – K
Patent
H - Electricity
05
K
356/2
H05K 13/08 (2006.01)
Patent
CA 1057410
ABSTRACT OF THE DISCLOSURE A tester for printed circuit board circuits having an elastomeric member on which printed circuit boards are positioned for testing. When a pressure differential is created across the member, the circuit hoard being tested is moved into contact with electrical leads connected to a computer programmed with respect to the circuits being tested. The circuit board is supported on the elastomeric member by a thin non-conducting, sealing foam sheet having a cutaway central portion to permit the circuit to make contact with the leads which extend through openings in the elastomeric member and outwardly thereof. Under the thin foam is, preferably, a non-conducting sheet of thicker foam, both layers of foam being supported on the elastomeric member, and being movable by the pressure differential to lower the foam layers with respect to the electrical leads and also to lower the circuit board to make contact with the leads. Means are provided to automatically align the board on the tester and a switch is provided to be actuated by the circuit board to cause the pressure differential to be automatically created when the board is in place. A multiple unit device for testing any of a plurality of circuit board configurations without rewiring employs a plurality of different sealing foam sheets to mask out all but one of the testing units at any one time.
273779
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