Printed matrix board assembly

Claim 1

A CROSSPOINT MATRIX ASSEMBLY COMPRISING IN COMBINATION: AT LEAST TWO CARDS OF INSULATING MATERIAL POSITIONED ADJACENT AND SECURED TO EACH OTHER WITH MOUNTING APERTURES EXTENDING THERETHROUGH, SAID CARDS FORMING A FLAT MULIT-LAYER BOARD, SETS OF PRINTED CONDUCTORS ON SAID BOARD FORMING A COORDINATE ARRAY OF VERTICAL AND HORIZONTAL SETS, SAID VERTICAL CONDUCTOR SETS BEING CARRIED ON ONE SURFACE OF ONE OF SAID CARDS AND SAID HORIZONTAL CONDUCTOR SETS BEING CARRIED ON SAID SURFACE OF THE OTHER CARD IN INSULATED RELATION TO SAID VERTICAL SETS, A MATRIX OF REED RELAYS MOUNTED PERPENDICULAR TO, AND ON ONE SIDE ONLY OF SAID BOARD AND EACH HAVING A COIL WITH TWO ENDS, A PLURALITY OF PAIRS OF ENCAPSULATED SWITCH CONTACTS OPERATED IN RESPONSE TO THE ENENERGIZATION OF SAID COIL AND FOUR SEPARATE GROUPS OF TERMINALS PROJECTING WITH THEIR FREE ENDS FROM ONE END OF SAID RELAY INTO CORRESPONDING ONES OF SAID APERTURES, CERTAIN ONES OF SAID TERMINALS TERMINATING SAID COIL ENDS AND CERTAIN OTHERS OF SAID TERMINALS TERMINATING SAID CONTACTS, AND SAID FOUR GROUPS OF TERMINALS AND APERTURES BEING DISPOSED SUBSTANTIALLY ALONG THE FOUR SIDES OF A RECTANGLE WHICH OVERLAPS THE RECTANGULAR AREA OF PROJECTED INTERSECTION OF THE RESPECTIVE VERTICAL CONDUCTOR SET AND THE RESPECTIVE HORIZONTAL CONDUCTOR SET, SO THAT AT LEAST SOME OF SAID VERTICAL AND HORIZONTAL CONDUCTORS EXTEND BETWEEN ADJACENT VERTICAL AND HORIZONTAL LINES RESPECTIVELY OF SAID TERMINALS, FIRST LINKING CONDUCTORS PRINTED ON SAID FIRST-MENTIONED SURFACE AND CONNECTING THE TERMINALS TERMINATING ONE END OF SAID COIL AND ONE CONTACT OF EACH SAID PAIR SEPARATELY TO CORRESPONDING CONDUCTORS OF THE RESPECTIVE VERTICAL SET, AND SECOND LINKING CONDUCTORS PRINTED ON SAID SECOND-MENTIONED SURFACE AND CONNECTING THE TERMINALS TERMINATING THE OTHER END OF SAID COIL AND THE OTHER CONTACT OF EACH SAID PAIR SEPARATELY TO CORRESPONDING CONDUCTORS OF THE RESPECTIVE HORIZONTAL SET.