Printed circuit board keying system

Geometrical instruments

Patent

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339186M, H01R 13645

Patent

active

045681341

ABSTRACT:
Incorrect pairing of subsidiary printed circuit boards on opposite sides of a main circuit board is prevented by providing a key or orientation insert on each subsidiary circuit board which projects more than half way through an aperture in the main circuit board. Only subsidiary circuit boards with orientation inserts that complement one another in the main circuit board aperture can be mounted opposite one another on the main circuit board.

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patent: 4376565 (1983-03-01), Bird et al.
patent: 4398779 (1983-08-01), Ling
patent: 4435031 (1984-03-01), Black et al.
IBM Technical Disclosure Bulletin, vol. 15, No. 2, pp. 624-625 (Jul. 1972), C. R. Pettie.
IBM Technical Disclosure Bulletin, vol. 21, No. 2, pp. 519-521, Jul. 1978, M. W. Bombara et al.

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