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Mass and force meter

  • US 4,075,887 A
  • Filed: 12/22/1975
  • Issued: 02/28/1978
  • Est. Priority Date: 01/23/1975
  • Status: Expired due to Term
First Claim
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1. A mass and force meter comprising a frame, a digital evaluation and display device, two pre-tensioned electrically conductive strings, each having one end thereof fixed electrically insulated to said frame, a force distributor, the other end of said strings being connected electrically to said force distributor, an exciter comprising electrical circuits for each string controlling an alternative current, two electric conductors, one in each of said circuits being electrically connected to said force distributor, a magnetic field extending over a part of the length of said strings, said alternative current exciting said strings to transversal vibrations, first and second transmission elements for transmitting to said strings a pre-tensioning force and a force proportional to the mass or force to be measured respectively, an electrically insulating element at each end of said transmission elements, said insulating elements being connected to said force distributor, which is thereby electrically insulated from said frame, the other ends of said transmission elements being operatively connected to receive their respective forces, means for applying to the evaluation and display device resultant frequency variations caused by the variations of tension of said strings due to the application of the force proportional to the mass or force to be measured.

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