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Customer activity monitor

  • US 5,250,941 A
  • Filed: 08/09/1991
  • Issued: 10/05/1993
  • Est. Priority Date: 08/09/1991
  • Status: Expired due to Fees
First Claim
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1. An entity monitoring arrangement comprising:

  • a sensor responsive to the presence of an entity for generating a signal;

    clock means for measuring the passage of time;

    digital data processing means connected to said sensor and to said clock means for correlating each signal from said sensor with time as measured by said clock means;

    digital storage means connected to said data processing means for storing each correlated signal as data;

    a battery; and

    power-saving means connected to said sensor and between said battery and said data processing and storage means for applying power to said data processing and storage means only during a time period immediately after said sensor generates a signal, and for disconnecting power from said data processing and storage means at all other times, said battery being connected to said sensor at all times for powering said sensor continuously.

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