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Cellular car telephone dialing controller

  • US 5,131,029 A
  • Filed: 08/23/1990
  • Issued: 07/14/1992
  • Est. Priority Date: 08/23/1990
  • Status: Expired due to Fees
First Claim
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1. A cellular car telephone dialing controller, for minimizing operator distraction by allowing hands-free, and no-eyes-required dialing operation, comprising:

  • an electrical switch conveniently mounted relative to a human operator, who is the driver of a vehicle, for producing actuation signals;

    a state machine responsively connected to said electrical switch, said state machine being able to assume a current stable state which is one of a multiple stable states;

    a pause control, responsively connected to said state machine;

    said pause control, in response to receiving a trigger signal from said state machine, returns a second signal to said state machine, thereby causing said state machine to change said current stable state to another one of said multiple stable states;

    a stored voice response unit comprising means for converting digitized audio messages, previously stored in a electrically pre-programmed memory, to audio messages, said audio messages being specifically different from each other, whereas each of said audio messages corresponds to one of said multiple stable states, and when commanded by the state machine, said audio messages are made audible to the human operator via a speaker, the specific audio messages being issued at any specific time depends on said one of said multiple stable states assumed by said state machine;

    a number storage unit, electrically connected to said state machine, for registering said current state of the state machine when commanded by the state machine;

    a dual-tone multi-frequency signal generator for issuing conventional dialing signals to cellular telephone instrument when commanded by the state machine, whereas transmission of said dialing signals depends on number information supplied by said number storage unit, whereas said number information corresponds to information registered in said number storage unit;

    said state machine is further used for;

    (a) decoding said actuation signals from said electrical switch by counting the number of actuation and their relative time, thereby changing said current stable state to a subsequent or previous state as a result of said decoding action;

    (b) issuing a first trigger signal to said pause control unit when said state machine assumes one of said multiple stable states;

    (c) issuing a second trigger signal accompanied by specific state information to said voice response unit when said state machine assumes one of said multiple stable states;

    (d) issuing a third trigger signal accompanied by specific state information to said number storage unit when said state machine assumes one of said multiple stable states;

    (e) issuing a fourth trigger signal to said signal generator when said state machine assumes one of said multiple stable states;

    (f) issuing Off-Hook and On-Hook signals to said cellular telephone instrument when said state machine assumes one of said multiple stable states.

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