Means for measuring the plasticity of coal

Details Means for measuring the plasticity of coal Means for measuring the plasticity of coal

1976-11-15

1978-02-21

Ciarlante, Anthony V.

Measuring and testing

Gas content of a liquid or a solid

By vibration

73101, G01N 2504

Patent

active

040745619

ABSTRACT:
A device for measuring the plastic characteristics of coal includes a bath of molten metal and a crucible with a coal sample therein positioned within said bath. A drive motor is connected through a hysteresis brake to a stir rod positioned in the coal sample. As the coal sample plasticizes due to heat from the molten metal, a calibrated disc connected to the stir rod will be driven by the motor. Optical sensing means including a phototransistor and a light source positioned on opposite sides of the calibrated disc are connected to a counter which is used to record stir rod movement within a given time reference.

REFERENCES:
patent: 3436655 (1969-04-01), Lundgreen
patent: 3814934 (1974-06-01), Mesh et al.
American Society for Testing Materials, Plastic Properties of Coal by the Constant-Torque Gieseler Plastometer, pp. 492-497, 9/24/71.

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