Simplified tabulator keyboard assembly for use in watch/calculator having transparent foldable flexible printed circuit board with contacts and actuator indicia

As simplified tabulator keyboard assembly for use in a digital watch/calculator comprising:

• a flexible circuit of unitary construction with metallic conductive areas and a flexible insulative backing, said flexible circuit comprising:
• a lower array of contacts, each of said contacts make electrical connection to a contact terminator provided as part of said flexible circuit;
• an upper array of deformable contacts, each of said deformable contacts making electrical connection to a contact terminator provided as part of said flexible circuit and being provided with a plurality of conductive tabs, one for each of said contacts in said lower array;
• a flexible conductor portion for making electrical connection to at least the electronics module of said watch calculator;
• said lower array and said upper array are separated by an insulative spacer having a plurality of holes, one for the intersection of each contact in said lower array with each contact of said upper array;
• said upper array is folded over said lower array such that the metallic conductive portions thereof directly face the respective metallic conductive portions of said lower array but are separated thereform by said insulative spacer;
• and
• an indicia array having a plurality of numeric and other symbols defined by a metallized region, one of such symbols being provided for each of said holes in said insulative spacer;
• and
• said indicia array is folded over said upper array such that the metallized portions of said indicia array are in contact with the insulative backing of said upper array.