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Door camera unit having a video memory

  • US 6,466,261 B1
  • Filed: 03/20/1998
  • Issued: 10/15/2002
  • Est. Priority Date: 05/15/1997
  • Status: Expired due to Fees
First Claim
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1. In combination, a door camera unit and an information inputting section, said door camera unit comprising:

  • a video camera for receiving video signals;

    a video memory for storing said video signals;

    a controller for recording said video signals into said video memory; and

    means for recording a video image from said video signals in said video memory every time an information signal inputted from said information inputting section to said controller meets video recording execution conditions; and

    said information inputting section comprising a chime switch operated by a visitor and a human body detecting sensor for detecting access of said visitor;

    wherein said video recording execution conditions include recording said video signal in said video memory unless an operation signal is inputted to said controller from said chime switch in a predetermined period of time after a detection signal has been inputted to said controller from said human body detecting sensor.

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