Weighing scales – Self-positioning – Repositioning in response to deflection under load
Patent
1982-03-23
1984-02-07
Hartary, Joseph W.
Weighing scales
Self-positioning
Repositioning in response to deflection under load
177210EM, 177DIG5, G01G 700, G01G 2348
Patent
active
044297572
ABSTRACT:
A weighing apparatus of the electromagnetic load compensation type is disclosed, including a housing, a load receiver connected for vertical movement relative to the housing, a permanent magnet system connected with the housing for establishing a permanent magnetic field, and an electromagnetic compensating system including a compensation coil connected with the load receiver for movement within the magnetic field. The invention is characterized in that--in order to simplify manufacture and assembly while also achieving low structural height-the permanent magnet system includes a hollow sectional open-ended soft iron yoke member having a generally rectangular cross-sectional configuration, which yoke member is formed from a pair of longitudinally extending generally identical sections. At least one flat permanent magnet is mounted on the inner surface of the yoke member for establishing a flux path therein to generate the magnetic field.
REFERENCES:
patent: 3786678 (1974-01-01), Kunz
patent: 3789937 (1974-02-01), Strobel
patent: 4043415 (1977-08-01), Luchinger
patent: 4062417 (1977-12-01), Kunz
patent: 4090575 (1978-05-01), Kunz
patent: 4109738 (1978-08-01), Kunz
patent: 4311202 (1982-01-01), Kunz
patent: 4337838 (1982-07-01), Kunz
patent: 4373596 (1983-02-01), Kunz
Hartary Joseph W.
Mettler Instrumente AG
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