公开(公告)号：US3685604A

公开(公告)日：1972-08-22

申请号：US3685604D

申请日：1970-09-28

Applicant: WM AINSWORTH INC

Inventor： SMITH JAMES E ,  BORGOGNO VICTOR F

IPC: G01G1/24 ,  G01G7/04 ,  G01G21/00 ,  G01G21/02 ,  G01G21/10 ,  G01G3/14

CPC classification number: G01G21/02 ,  G01G1/246 ,  G01G7/04 ,  G01G21/00 ,  Y10S177/09

Abstract: A pivotally mounted balance beam is constructed and arranged to nullify its pendular characteristics by appropriately distributing and balancing the moments of the mass both parallel and perpendicular to the beam plane so that whenever the beam reference plane is tilted out of the horizontal any weighing errors resulting from tilt and vibration of the frame of the weigh balance apparatus are minimized. In forming a part of the weigh balance apparatus, a circuit generates an output proportional to load as a function of beam deflection sensed by capacitive sensors and operates through an electromagnetic restoring device including a beam mounted forcer coil to restore the beam to its null position. The coil is connected through electrically conductive knife edges and bearing flats to receive the circuit output and has its position relative to the magnet of the restoring device set so that the restoring device has a linear response to the circuit output. A display receives the circuit output and is compensated for errors caused by changes in the response of the restoring device as a function of its operating temperature to provide a readout representing load.

Abstract translation: 枢轴安装的平衡梁被构造和布置成通过适当地分布和平衡与梁平面平行和垂直的质量的力矩来消除其摆动特性，使得每当梁参考平面从水平面倾斜时，由 重量平衡装置的框架的倾斜和振动最小化。 在形成称重平衡装置的一部分时，电路产生与负载成比例的输出，作为由电容式传感器感测的光束偏转的函数，并且通过包括光束安装的线圈的电磁恢复装置进行操作，以将光束恢复到其零位置。 线圈通过导电刀刃和轴承平面连接以接收电路输出并且具有相对于恢复装置组的磁体的位置，使得恢复装置对电路输出具有线性响应。 显示器接收电路输出，并且对由恢复装置的响应的变化引起的错误作为其工作温度的函数进行补偿，以提供代表负载的读出。