| 摘要 |
A liquid filled vial pivotally and resiliently mounted is operable to unlock the dial mechanism of the invention in one and only one position as the slump indicator is rotationally carried in a mixing drum and to maintain the indicator in a fixed position and thus maintain the reading throughout the rotational cycle of the drum. Deflector walls are provided on two opposing sides of a sample cage hingedly carried by a strain gauge indicator assembly. The strain gauge indicator assembly comprises a tension plate mounted on a spring and slidably carried in a multiplicity of yokes on a mounting base, a normally locked indicator, a shaft suitably fixed at one of its terminal ends to the tension plate and having a sample cage hingedly carried at the opposite end thereof.
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