ELECTRICAL CONTACT-MAKING KEYBOARDS

摘要

A series of laterally spaced brackets are secured together by a printed circuit board on which is mounted a parallel array of L-shaped wires having their short legs molded in a plastic block and their long legs disposed in slots in a plastic guide member. Plastic keys are pivoted at one end to a bar supported by the brackets, and have plugs at an intermediate position which are guided into predetermined slots in the guide member when the keys are depressed. Key circuits are molded into each key and, upon contact of the plug with the long leg of an L-shaped wire in the selected slot, connect two binary bit wires constituting the binary code of the depressed key to a binary code terminal strip.