| 摘要 |
1,255,392. Weighing apparatus. STAMICARBON N.V. Jan.24, 1969 [Jan. 25, 1968], No. 4172/69. Heading G1W. A torsion balance comprising a pair of balance arms 1, 2 mounted on horizontal torsion wires or strips 3, 4 is provided with a pair of connecting members 14, 15 connected to the balance arms 1, 2 by resiliently yieldable elements 10, 11, 12, 13, one of the connecting members 15 being provided with a load carrying member 16 which extends into a chamber 20 permitting thermal treatment of a load during weighing. As shown, the yieldable elements 10, 11, 12, 13 are formed by taut wires to which the arms 1, 2 and members 14, 15 are attached, the member 16 extending with limited clearance through a tube 19 in the wall of the chamber 20 and supporting, at its free end, a load pan 18 inside the enclosure. A load when mounted on the pan 18 causes the arms 1, 2 to tilt and, by way of a light source 7 and light detector 8 connected to an electrical circuit 9, a coil 5 in a casing 6 to restore the arms 1, 2 to their equilibrium position, the electrical circuit being arranged to actuate indicating and/or recording devices to obtain the weight of the load. The resiliently yieldable elements 10, 11, 12, 13 are so arranged that independent of the position of the load on the load pan or the load pan on the member 16 or thermal expansion of the member 16 the restoring effect produced by the coil during weighing is directly dependent on the magnitude of the load.
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