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Mobile machine hazardous working zone warning system

  • US 5,939,986 A
  • Filed: 10/18/1996
  • Issued: 08/17/1999
  • Est. Priority Date: 10/18/1996
  • Status: Expired due to Term
First Claim
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1. A warning system for a mobile working machine to alert an individual who strays into a hazardous working zone of the machine, said warning system comprising:

  • (a) transmitter means mounted on said machine and operable to generate a magnetic field projecting beyond an outer periphery of said machine in defining a hazardous working zone enveloping said machine upon operation thereof, and(b) receiver means responsive to the magnetic field generated by said transmitter, said receiver means carried by an individual to provide an alarm signal to alert the individual upon entering said hazardous working zone of said machine.

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