Top scale balance

Details Top scale balance Top scale balance

1995-10-03

1999-10-05

Stright, Ronald

Weighing scales

Self-positioning

Spring

177210EM, 177255, G01G 308, G01G 314, G01G 2112

Patent

active

059628189

ABSTRACT:
In a top scale balance which has a Roberval's chain 10 and a load weight transmitting lever 30 and in which a movable post 13 of the Roberval's chain 10 is connected to a point of force 32 of the lever 30 through an elastic connection fulcrum 51, a horizontal member 12 nearer to the elastic connection fulcrum 51, out of upper and lower horizontal members 11, 12 of the Roberval's chain 10, is greater in rigidity than the other horizontal member 11. Alternately, the upper and lower horizontal members 11, 12 are equal in rigidity and the elastic connection fulcrum 51 is positioned, in the vertical direction, at the center between the upper and lower horizontal members 11, 12. Such an arrangement prevents or reduces the movement of the elastic connection fulcrum 51 in the back-and-forth direction due to an offset placed load. Thus, even though the top scale balance is made in a compact and thin design with the lever ratio increased, the top scale balance is high in precision with a less offset position error.

REFERENCES:
patent: 4184557 (1980-01-01), Kunx
patent: 4482022 (1984-11-01), Komoto
patent: 4485881 (1984-12-01), Tramposch et al.
patent: 4653600 (1987-03-01), Melcher et al.
patent: 4798251 (1989-01-01), Maaz et al.
patent: 5052505 (1991-10-01), Naito et al.
patent: 5338902 (1994-08-01), Uchiike

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