Weighing scales – Self-positioning – Spring
Patent
1990-09-24
1992-12-01
Miller, Jr., George H.
Weighing scales
Self-positioning
Spring
177210C, G01G 300, G01G 314
Patent
active
051672901
ABSTRACT:
Springs for use in a weighing system for measuring gems and other very light masses. A pan and sensor assembly is used in which the springs are sandwiched between the plates of the sensor assembly. The springs have a generally conic cross-section and include holes for releasing air pressure when the pan and sensor assembly is compressed. In a preferred embodiment, grooves are provided in the surface of the springs which allow the springs to compress, in a bellows or accordion-like fashion, substantially parallel to a central axis. One large spring or a plurality of springs may be used in a weighing system. The weighing system uses three or more transducers about the pan to measure the weight of the mass, and correlates the values measured by each transducer for a given mass, at given locations, to arrive at a true weight value for the mass in spite of its potentially off-center location on the system's holding pan.
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