| 摘要 |
Apparatus for delivering a predetermined weight of material to a receptacle therefor utilizes a pair of rotatable scale beams with poises disposed on the beams. A scale is included on the face of each beam thus allowing the effective counterweight of the poises to be divided between the beams and the scales on each beam to be divided into relatively small weight increments for increased accuracy. The beams are rotated about an axis when the weight of the filled receptacle exceeds the effective counterweight of the poises. The major portion of the weight of both the filled receptacle and the poises is always below the axis of rotation of the beams to assure that the center of gravity of the forces acting on the beam is always below this axis. This results in an inherent damping effect on any swinging movement of the beams and eliminates the need for a separate damping mechanism. The material delivered to the receptacle passes through a control opening which is closed by a swingable gate in response to rotation of the beams when the predetermined weight is reached.
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