CODING KEYBOARD AND ELECTRICAL SWITCH THEREFOR

摘要

A keyboard for electronic apparatus such as computer and communication equipment, and an electrical switch therefor including a resilient deformable tube filled with an electrically conductive liquid such as mercury. Included in the keyboard is an elongated conductive means comprising a plurality of side-by-side conductors. The keyboard switch modules are each provided with a plurality of contact elements and mounting means adapted for holding the contact elements in anyone of a plurality of predetermined positions whereby each switch module can be encoded and thus preconditioned for electrically energizing a different preselected combination of the conductors to represent the desired code data unique to each switch.