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Reminder device

  • US 5,554,967 A
  • Filed: 07/08/1994
  • Issued: 09/10/1996
  • Est. Priority Date: 07/08/1994
  • Status: Expired due to Term
First Claim
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1. A reminder device for notifying a user of the expiration of a first predetermined time period and of the expiration of an interval time period, the device comprising:

  • a first timer for updating an elapsed interval time;

    a second timer for updating a current interval time;

    a memory for storing a plurality of predetermined interval time periods, said predetermined interval time periods being of generally increasing duration;

    a logic unit for selecting one of said plurality of predetermined interval time periods;

    a register for storing said selected one of said plurality of predetermined interval time periods;

    a first comparator for comparing the current interval time to said selected one of said plurality of predetermined interval time periods and generating a first compare signal therefrom;

    a second comparator for comparing the elapsed interval time to the first predetermined time period and generating a second compare signal therefrom to cease operation of the device when the elapsed interval time and the first predetermined time period are the same;

    an alarm responsive to the first compare signal for notifying the user that the current interval time is equal to said selected one of said predetermined interval time periods signifying the expiration of said predetermined interval time period; and

    a first switch for disabling the alarm and signalling the logic unit to select one of said predetermined interval time periods and store said selected predetermined interval time period in said register, reset the current interval time and restart the second timer.

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