Silent communicator

A portable hand-held electronic alphanumeric display device for communication of words and numbers comprising:

• means to provide electrical energy to said device;
• keyboard means to input a desired letter or numeral into said device;
• means to encode said input letter or numeral to provide a data input into said device;
• memory means to store said data input;
• scan logic means to remove said data input from said memory means and present said data input sequentially as data output from said device;
• means to display said data output;
• a unitary logic means to both update the display with a new character and to cause the previously displayed characters to shift one position to the left;
• a clock operatively connected to said scan logic, memory and unitary logic, wherein the means to update the display and shift characters leftwardly is logic means activated during the refreshing of a multiplexed display to permit replacement of a character in memory, which character is visualized in the leftmost position of the display, said means being responsive to the keyboard activation;
• said means also desynchronizing the scan and memory timing when activated to thereby cause the character in the oldest memory position to be replaced, and to be displayed in the rightmost position of the display while shifting the visual position of each previously displayed character to the next leftwardly location in the display and;
• enclosure means to substantially enclose said power supply means, encoding means and memory means and circumferentially enclose said input means and display means so that said input means and display means are functionally visible to a person operating said device.