Constant moment weigh scale with floating flexure beam

Details Constant moment weigh scale with floating flexure beam Constant moment weigh scale with floating flexure beam

G - Physics

01

G

265/27

G01G 3/14 (2006.01) G01G 3/18 (2006.01) G01G 21/18 (2006.01)

Patent

CA 1047055

ABSTRACT OF THE DISCLOSURE A weigh scale apparatus in which forces caused by the applied load are transformed into moments of opposite sense and applied to opposite ends of a substantially rigid beam. Deflection of the beam is measured by centrally dis- posed strain gage resistors to produce an electrical signal quantity proportional to the applied load. The conversion of applied load to moments of opposite sense is accomplished by a pair of spaced parallel pivot members which are sus- pended by straps between the load receiving pan and the base such that the pivots tend to rotate in opposite directions. The beam is mechanically connected between the pivots such that it is subjected to the bending moment over substantially its entire length. A split scale device is provided by a composite pan, one portion of which is connected to the pivots directly and another portion of which is connected to the pivots through long lever arms to provide moment multiplica- tion. A vibrator device for dithering the pivots is pro- vided.

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