Shimadzu Corporation

Takenaka Komuten Co., Ltd.

Kazuo Nishibayashi

Akira Komoto

Kunio Shimauchi

Shozo Yano

Akihiro Fukai

Osamu Kawabata

Naoyosi Tanide

Sadao Wada

Shohei Ishida

Yasuhiko Sugimoto

Kobun Suda

Tadashi Yamaguchi

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.

Top scale balance

A method and an apparatus for testing the quality of ready-mixed concrete. The present invention enables the water-to-cement ratio in ready-mixed concrete to be measured quickly and precisely through the measurement of the weight and underwater weight of mortar extracted from the ready-mixed concrete whose quality is to be examined.

Method and apparatus for testing ready-mixed concrete

Growing community of inventors

Yamashina, Japan

Kazuo Nishibayashi