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United States Patent 4,738,324
Borchard Apr. 19, 1988

Self-adjusting weighing system

Inventors: Borchard; John S. (36 Whitney Tavern Rd., Weston, MA 02193).
Appl. No.: 018,176
Filed: Feb. 24, 1987
Intl. Cl.: G01G 23/22; G01G 3/14; G01G 3/00;
U.S. Cl.: 177/25.; 177/210.C;
Field of Search: 210 C;255;25.14;225

References Cited

U.S. Patent Documents

3,966,002 Jun., 1976 Schneider
4,273,204 Jun., 1981 Gillen
4,401,173 Aug., 1983 Komoto
4,629,019 Dec., 1986 Harrington et al. 177/210 C
4,646,859 Mar., 1987 Stuart
4,679,643 Jul., 1987 Bove 177/210 C

Primary Examiner: Miller, Jr.; George H.

Abstract

A weighing system for measuring gems and other very light masses with means for correcting errors in the measured value of said masses due to off-center placement on the system's holding pan. The system uses three or more transducers about the pan to measure the weight of the mass, and contains means for correlating the various transducer sensed values for a given mass at given locations to arrive at a true weight value for the mass in spite of its location on the system's holding pan.

28 Claims, 9 Drawing Figures

     

 

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