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TELEPHONE COMMUNICATION SYSTEM FOR THE HEARING IMPAIRED

  • US 3,746,793 A
  • Filed: 08/09/1972
  • Issued: 07/17/1973
  • Est. Priority Date: 08/09/1972
  • Status: Expired due to Term
First Claim
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1. A telephone communication system for the hearing impaired, the system having at least two communication stations, each station comprising:

  • an acoustic coupler for operating with a telephone receiver;

    means connected to the coupler output for generating electrical message signals in response to a telephone message received from another station;

    means connected to the output of the generating means for encoding the electrical message signals into an electrically coded signal;

    means connected to the output of the encoding means to translate the coded signals into signals representing a plurality of respective character dot matrices;

    circuit means for connecting the translated matrix signals to a signal mixer where a carrier signal is modulated by the translated signals;

    means for connecting vertical and horizontal synchronizing signals to the mixer;

    means connected to the output of the mixer for converting the mixed signal to the RF region;

    output means connected to the output of the converting means to permit direct connection of the system to the antenna of a conventional TV;

    whereby a row by row display of the received message can be effected;

    a keyboard for entering a message at one station to be transmitted to the other station;

    means connected to the keyboard for encoding the message in the form of a coded signal;

    means connected to the encoding means and responsive to the coded signal for generating audio tones, coupled by the acoustic coupler, to a telephone for transmitting the message to the other station;

    counter means for monitoring utilization of the keyboard as the keyboard is actuated, as well as the elapsed time said one station is in actual use and power is on;

    means connected to the output of the counter means for indicaTing to the user a first count condition;

    means connected to the output of the acoustic coupler and responsive to receipt of a special reset code from another party, for resetting the counter means; and

    means connected to the counter means for disabling said one station'"'"''"'"'s output means if the reset does not occur and the counter reaches a second count condition.

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