Weigher head

Abstract

Abstract A WEIGHER HEAD IS PROVIDED FOR USE IN HIGH SPEED, HIGH PRECISION ROTARY WEIGHTING MACHINES, IN WHICH HEAD A SYSTEM OF LEAF SPRINGS IS SUBSTITUTED FOR THE USUAL MEANS BY WHICH A SCALE BEAM WITHIN THE HOUSING OF THE HEAD IS PIVOTED. THE SPRINGS INCLUDE A PAIR WHICH ARE HORIZONTALLY DISPOSED, EACH BEING ANCHORED AT ONE END OF THE HOUSING AND AT THE OPPOSITE END THEREOF SECURED TO A VERTICALLY DISPOSED MEMBER BY WHICH A WEIGHING RECEPTACLE ASSOCIATED WITH THE HEAD IS SUPPORTED. THE LEAF SPRINGS FURTHER INCLUDE A VERTICALLY DISPOSED PAIR, ONE OF WHICH IS ANCHORED AT ONE END TO THE HOUSING, BEING SECURED AT ITS OPPOSITE END TO THE SCALE BEAM, AND THE OTHER OF WHICH IS SECURED AT ITS OPPOSITE ENDS TO THE BEAM AND TO THE RECEPTACLE SURRPORING MEMBER. THE HEAD ALSO INCLUDES FURTHER MEANS BY WHICH THE SCALE BEAM IS PERIODICALLY "ZEROED" TO COMPENSATE FOR THE DISTURBING EFFECT OF A POSSIBLE ACCERTION OF GREASE, COATING MATERIAL OR THE LIKE UPON THE WEIGHING RECEPTACLE, AS WELL AS TO COMPENSATE OUT OTHER FACTORS INFLUENCING HIGH-PRECISION WEIGHING. PROVISION IS ALSO MADE TO MAKE ADJUSTMENTS FOR THE PURPOSE OF MAINTAINING PRECISE ACCURACY OF WEIGHING WITHIN PREDETERMINED HIGH AND LOW GOAL LIMITS.

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