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Stand alone emergency signal device housed in cell phone

  • US 7,920,891 B2
  • Filed: 09/21/2007
  • Issued: 04/05/2011
  • Est. Priority Date: 09/21/2007
  • Status: Active Grant
First Claim
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1. An improved cell phone having conventional modules including a transceiver and a first rechargeable battery, the improvement comprising:

  • an emergency signal device comprising;

    an emergency key;

    an independent control circuit containing a processor, coupled with said emergency key;

    a dedicated memory coupled with said processor;

    a GPS receiving part coupled with said control circuit;

    one or more solar cells, electrically connected with said control circuit; and

    coupled witha second rechargeable battery operatively coupled with said control circuit for use only in connection with the emergency signal device to ensure that the emergency signal device has battery power available for use even if the first rechargeable battery has no available battery power.

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