| 摘要 |
This invention relates generally to code conversion and more particularly to the production of electrical signals from a keyboard, the keys of which are operatively connected to one or more individual current control devices, such as reed switches, whose activation to conducting or nonconducting operating conditions is determined by the presence or absence of an influencing magnetic field. The disclosure illustrates a compact assembly of dry reed switches and associated magnets and magnetic shields or shunts, each shunt normally being interposed between its associated magnet and switch and movable to a withdrawn position by activating a key of the keyboard. Means is provided for electrically strobing the reed switches and for performing this operation only after assurance that all reed switches are stabilized in their prescribed code positions as the result of the actuation of a selected key. Means is also provided for substantially lessening the number of switch closures necessary for converting the keyboard operation to electrical signals in binary code form. As a result of the mounting arrangement of the magnetic transducing elements an efficient utilization of the field shunting operation is obtained and an improved key touch is achieved.
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