| 摘要 |
A weighing apparatus has a closed chamber of variable volume adapted to receive a load. An upright tube has an upper end open to the atmosphere and a lower end connected via a conduit to the chamber for fluid communication therebetween. This conduit has a first section of relatively small diameter connected between the upper end of a large-diameter reservoir and a second narrow-diameter section connecting the lower end of the reservoir with the lower end of the tube. A first liquid of relatively light density completely fills the chamber, the first section of the tube, and the upper portion of the reservoir. A second liquid of relatively heavy density completely fills the second section of the conduit, the rest of the reservoir, and a portion of the tube. Thus compression of the closed chamber will move the surface level of the second relatively heavy liquid upwardly in the tube. The increase in the weight of the mass of the heavy liquid in the tube can be weighed or measured to determine the weight of the object.
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