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AssigneeBowmar Instrument Corporation
InventorsAlan C. Yoder, John E. Weber
Estimating the term…
A printed wiring board for a keyboard switch assembly for electronic apparatus, such as electronic calculators, comprising a self-supporting insulative board having a plurality of elongated connectors on one surface thereof, at least some of the conductors having terminal portions for cooperating with switch elements. A layer of insulating material covers the one surface of the board and the conductors excluding the terminal portions. Each of the terminal portions has a coating of conductive ink thereon and a jumper element also formed of conductive ink is coated on the insulating layer crossing at least one of the conductors embedded therein and joining at least two of the terminal portion coatings. The conductive ink is preferably a noble-metal filled resin compound, such as silver epoxy, screen printed onto the insulating layer and terminal portions.
In a keyboard switch assembly for electronic apparatus comprising an insulative member having opposite surfaces with a plurality of elongated solid metal conductors on one said surface thereof, at least some of said conductors having enlarged portions thereon, at least some of said enlarged portions being switch terminals, and switch elements cooperating with respective switch terminals;
In a keyboard switch assembly for electronic apparatus comprising an insulative member having opposite surfaces with a plurality of elongated solid metal conductors on one said surface thereof, at least some of said conductors having enlarged portions thereon, a layer of insulating material having inner and outer surfaces with said inner surface covering said one surface of said member and said conductors thereon excluding said enlarged portions thereby exposing the same, and switch elements cooperating with certain of said enlarged portions;
Dependencies are inferred from the claim text.