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Safe load indicator

  • US 4,368,824 A
  • Filed: 05/13/1980
  • Issued: 01/18/1983
  • Est. Priority Date: 05/18/1979
  • Status: Expired due to Term
First Claim
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1. A crane with a crane jib having a data processing system comprising,a microprocessor,means for measuring an angle of elevation of said crane jib at the base of said jib,transmitting means transmitting said base angle to said microprocessor,means for measuring an angle of elevation of said crane jib at the head of said jib,transmitting means transmitting said head angle to said microprocessor,means for measuring the length of said jib from jib base to jib head,transmitting means transmitting said length to said microprocessor,said microprocessor being enabled to receive and process data corresponding to said angles and length so as to determine mathematically a true deflected form of said crane jib,whereby actual jib radius can be calculated.

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