Thick film resistor force transducers and weighing scales

Weighing scales – Self-positioning – Electrical current generating or modifying

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338 2, G01G 314, G01L 122

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043556922

ABSTRACT:
A mechanical force to electrical signal transducer includes a flexible metal body operable as a beam in which a bending strain is to be measured as a measure of a mechanical force. At least a part of one surface of the metal body includes an electrical insulating material with a resistance element formed from a layer of a thick film resistor ink of the type used for thick film integrated circuits fused upon the electrical insulating material. A plurality of such transducers may be combined in a weighing scale, with the individual transducers electrically interconnected to provide for electrical summing of the transducer signals to provide a total weight measurement.

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"Progress on Hybrid Technology in Italy" R. Dell'Acqua and F. Forlani of Magneti Marelli, Pavia, Italy, International Society for Hybrid Microelectronics, Proceedings 1979 International Microelectronics Symposium, Los Angeles, Calif. 11/13-11/15/79, pp. 247, 250.
"Characterization of Thick Film Compositions of Porcelainized Steel Substrates", Allington and Cote, duPont, Electronic Materials Division, Photo Products Dept., Niagara Falls, N.Y. 14302 (published prior to present application).

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