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Portable data entry device

  • US 4,090,247 A
  • Filed: 08/11/1975
  • Issued: 05/16/1978
  • Est. Priority Date: 08/11/1975
  • Status: Expired due to Term
First Claim
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1. A portable data entry device comprising:

  • a housing of size and configuration for portable use;

    a keyboard having a plurality of keys on said housing for the manual entry of numerical and code data;

    control keys on said housing for the manual control of memory access;

    a single electronic solid state serial shift register memory within said housing for containing a plurality of records, each record being composed of a plurality of multiple bit characters, said memory including input and output stages;

    first circuit means within said housing directly interconnecting said keyboard and said single serial shift register memory and operative upon actuation of any key of said keyboard to enter corresponding numerical or code data directly into an intended record location of said memory;

    second circuit means within said housing and operative upon manual actuation of said control keys for sequencing said memory to any intended record location for review and correction of data previously entered in any of said record locations;

    display means on said housing for visual representation of numerical and code data entered by said keyboard into said memory;

    connector means on said housing for direct electrical connection of said memory to a data utilization system for the transfer of data stored in said memory to said data utilization system;

    a power source within said housing and operative to energize said device;

    means operative to provide a signal indication of accessed memory locations; and

    means operative in response to said signal indication for energizing said input and output stages only when a selected location of said memory is accessed for entering data, for readout of data, or for display, data stored in said memory being unaffected when said input and output stages are not energized.

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