Back to results
US 4,738,324 AGranted
Self-adjusting weighing system
OwnerJohn S. Borchardinventor
Life of this patent
Estimating the term…
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.
Claims28
A self-adjusting weighing system comprising:
- a pan for receiving a load to be weighed;
- a plurality of springs connected about the periphery of the said pan to a base and individually responsive to the pan's position as a result of the load to be weighed being placed thereon;
- a plurality of sensors adapted to measure the load on said pan, positioned and connected between the pan and base, within the pan's periphery;
- electronic means which measures the effect of pan movement on said sensors due to load off-center placement, which adjusts for spring and sensor manufacturing variabilities, and which calculates a resultant weight;
- means for calculating and entering adjustment coefficients for spring and sensor manufacturing variabilities into said electronic means;
- and
- means for outputting said resultant weight.
4 more elements
A self-adjusting weighing system comprising:
- a rigid, spring-supported pan for receiving a load to be weighed;
- a plurality of springs symmetrically connected about the periphery of the said pan to a base, and individually responsive to the pan's position as a result of the load to be weighed being placed thereon;
- a plurality of sensors symmetrically positioned and connected between the pan and the base, within the pan's periphery;
- electronic means which measure the effects of pan movement on said sensors due to load off-center placement, which adjusts for spring and sensor manufacturing variabilities, and which calculates a resultant weight;
- means for calculating and entering adjustment coefficients for spring and sensor manufacturing variabilities into said electronic means;
- and
- means for outputting said resultant weight.
4 more elements
A self-adjusting weighing system comprising:
- a pan for receiving a load to be weighed;
- a plurality of transducers positioned about the pan and adapted to measure the load on said pan;
- means for correcting an error in the measured value of said load due to off-center placement of said load on said pan, comprised of electronic means which measures the effect of pan movement on said transducers due to load off-center placement, which adjusts for transducer manufacturing variabilities, and which calculates a resultant weight, and means for calculating and entering adjustment coefficients for spring and sensor manufacturing variabilities into said electronic means;
- and
- means for outputting said corrected measured value.
2 more elements
Dependencies are inferred from the claim text.