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Alarm system for sensing and vocally warning a person to step back from a protected object

  • US 5,117,217 A
  • Filed: 11/07/1990
  • Issued: 05/26/1992
  • Est. Priority Date: 01/21/1987
  • Status: Expired due to Term
First Claim
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1. Apparatus for warning persons away from an object who move sufficiently near the object to inflect damage thereto comprisingsensing means for sensing the presence of a person sufficiently near said object to inflict damage thereto;

  • means for electronically issuing a first speech message in response to sensing a person with said sensing means, said first speech message instructing said person to step back from said object; and

    means for sounding an alarm if the person sensed by said sensing means does not step back from said object, and for not sounding said alarm if the person does step back from said object.

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