Weighting scale having improved yoke mounting means

Details Weighting scale having improved yoke mounting means Weighting scale having improved yoke mounting means

1991-09-05

1992-12-29

Miller, Jr., George H.

Weighing scales

Self-positioning

Repositioning in response to deflection under load

G01G 700

Patent

active

051744015

ABSTRACT:
Weighing apparatus of the electromagnetic load compensation type includes a ferromagnetic yoke member (19), that is secured at a single point to the frame (3), thereby a permit the frame to be formed of a non-ferromagnetic material, such as aluminum, having a different coefficient of expansion than the yoke member. Preferably the yoke member is secured to the frame by a single screw (33,103) arranged at the axis of symmetry of the yoke member. Owing to the small contact surface between the yoke member and the frame, the production of temperature-responsive forces which would otherwise stress or distort the apparatus to adversely affect the accuracy of the weighing operation is avoided.

REFERENCES:
patent: 3955638 (1976-05-01), Wasko
patent: 4090575 (1978-05-01), Kunz
patent: 4148370 (1979-04-01), Luchinger et al.
patent: 4280577 (1981-07-01), Kunz
patent: 4429757 (1984-02-01), Kunz
patent: 4722409 (1988-02-01), Kunz
patent: 4799561 (1989-01-01), Komoto

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