Keyboard apparatus and method for making same

Details Keyboard apparatus and method for making same Keyboard apparatus and method for making same

1979-12-03

1982-06-01

Gilden, Leon

Metal working

Method of mechanical manufacture

Electrical device making

200 5A, 200159B, 29837, 29847, H01R 900

Patent

active

043320821

ABSTRACT:
A keyboard is assembled by providing first and second electrically conductive strips of layers and first and second electrically insulative strips of layers, forming the layers into a desired configuration and laminating them together with the respective insulative layers intermediate and on top of the conductive layers. Switching areas are delineated on at least one of the conductive layers and are joined to each other and are provided with output leads by conductive paths configured from the conductive layer. The interposed insulative layer is formed with a plurality of apertures located so that an aperture can be aligned with each switching area. After the layers are laminated together they are blanked out from the strips and holes and punched out through the four layers to sever selected conductive paths and form a preselected circuit pattern.

REFERENCES:
patent: 3950846 (1976-04-01), Johnson
patent: 4081898 (1978-04-01), Taylor
patent: 4118858 (1978-10-01), Taylor
patent: 4118859 (1978-10-01), Bisler
patent: 4131991 (1979-01-01), Reniker
patent: 4250495 (1981-02-01), Beckerman

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