| 摘要 |
Electromagnetically compensated weighing apparatus of the type including a load member connected with a frame for movement in a stationary magnetic field upon the application thereto of a load to be measured, and load compensating means including a compensating coil connected with said load member for producing a load magnetic force that reacts with said magnetic field to return the load member to its original neutral position, characterized by the provision of novel correction means for varying the strength of said magnetic field to eliminate the deleterious effects of external factors such as elevation, inclination, temperature and magnet aging. In the preferred embodiment, a correcting coil is mounted on a ferromagnetic portion of the magnetic means that establishes the magnetic field, the current flowing through said correcting coil being varied as a function of the deviation of a reference member from an initial equilibrium position relative to the frame.
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