Method and apparatus for determining weight and mass

Details Method and apparatus for determining weight and mass Method and apparatus for determining weight and mass

1976-05-14

1977-09-27

Miller, Jr., George H.

Weighing scales

Processes

177210FP, 73 672, G01G 314, G01N 2900

Patent

active

040505308

ABSTRACT:
A method and an apparatus is disclosed for measuring weighing and/or mass of an object. The object to be measured is subjected to an input frequency signal supplied to a piezoelectric crystal. Another piezoelectric crystal supporting the object is caused to vibrate in response to the input frequency signal and the mass and/or weight of the supported object. This second vibrating piezoelectric crystal will then produce a frequency output signal, whose amplitude is a function of the mass (and/or weight) of the object being measured. The frequency of the input and the output signals are substantially the same.

REFERENCES:
patent: 2305783 (1942-12-01), Heymann et al.
patent: 3374844 (1968-03-01), Rogers
patent: 3595329 (1971-07-01), Withnell
patent: 3926271 (1975-12-01), Patashnick
patent: 3967497 (1976-07-01), Brown

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