Force measuring apparatus of the vibratory string type

Details Force measuring apparatus of the vibratory string type Force measuring apparatus of the vibratory string type

1975-05-01

1976-06-15

Miller, Jr., George H.

Weighing scales

Self-positioning

Electrical current generating or modifying

73141R, G01G 314, G01L 512

Patent

active

039630820

ABSTRACT:
Improved force measuring apparatus of the one- or two- string type, including means for applying to the movable member of the apparatus a corrective force that compensates for nonlinearities in the response of the apparatus over the full range of travel of the pan carrier member between the no-load and full-load positions, thereby to produce a linear variation in the resulting oscillation frequency with respect to load. In the one-string embodiment, linearization means are provided for applying to the oscillatory string means a corrective force that varies quadratically with the displacement of the movable member over its full range between the no-load and full-load positions. In the two-string embodiment, decoupling spring means are provided for independently connecting the two strings in opposite senses between the frame and pan carrier members. The aforementioned linearization means and/or temperature compensation means are also provided for improving the operation of the two-string embodiment.

REFERENCES:
patent: 1806741 (1931-05-01), Cameron
patent: 3382942 (1968-05-01), Schmitter
patent: 3423999 (1969-01-01), Wirth et al.
patent: 3621713 (1971-11-01), Wirth et al.
patent: 3712395 (1973-01-01), Streater et al.

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