Patent ID: 6414252
Filing Date: 2002-07-02
Classification: G01G

Abstract:
A calibration system for a weighing scale, including:(a) monolithic block means including a rectangular elastic monolithic main block (1) having a stationary end portion (20), a load-receiving end portion (21) adapted to receive a load the weight of which is to be measured, and an intermediate portion (30) contained between said end portions; (b) transducer means (14) associated with said main block intermediate portion for producing a weight signal that is a function of the displacement produced by a load applied to said main block load-receiving end portion relative to said main block stationary end portion; and (c) calibration means for applying to said main block load-receiving portion a calibrating force, comprising: (1) means (17) for receiving a calibration weight (18); and (2) magnifying lever means connected with said calibration weight receiving means for applying to said main block load-receiving end portion a calibrating force that is greater than the weight of said calibration weight, said magnifying lever means including: (a) at least a first lever (5) coupled with said main block load-receiving end portion; (b) fulcrum means (2) supporting said first lever for pivotal movement relative to said main block stationary end portion; and (c) coupling means (4) coupling said first lever with said main block load-receiving end portion.