Measuring and testing – Sampler – sample handling – etc. – Withdrawing through conduit or receptacle wall
Patent
1983-02-22
1985-02-26
Swisher, S. Clement
Measuring and testing
Sampler, sample handling, etc.
Withdrawing through conduit or receptacle wall
222413, G01N 114
Patent
active
045011621
ABSTRACT:
Sample-taking apparatus, includes a container for bulk material feed, the container having an upper cover region, a lower discharge region and a side wall having a discharge opening formed therein, the bulk material feed flowing at least discontinuously from the upper cover region to the lower discharge region of the container, an exposed sample-taking worm being attached to the side wall and projecting through the discharge opening into the feed for conveying bulk material samples from the feed by rotating, a rotary drive connected to the sample-taking worm, and a collecting device integral with the container, the worm having a shaft with an end, at least the end being immersed in the feed, the worm having worm threads formed thereon with surfaces forming an imaginary surface of projection extended normal to the worm shaft, the worm thread surfaces forming worm segments with increasingly smaller conveying surfaces as seen in direction toward increasing depth of immersion of the worm into the feed, during sample-taking in a quasi-stationary condition of the feed, the worm threads accumulating layered hollow cylindrical bulk material segments between the worm threads in subsets corresponding to worm segments from any one of the worm threads having a given spiral height to an adjacent one of the worm threads having a larger spiral height as seen in direction from the end of the shaft to the discharge opening, the subsets being representative of the bulk material of the respective segments of the worm.
REFERENCES:
patent: 2056239 (1936-10-01), Walter
patent: 3206981 (1965-09-01), Jameson
patent: 3279259 (1966-10-01), Haley
Greenberg Laurence A.
Kraftwerk Union Aktiengesellschaft
Lerner Herbert L.
Swisher S. Clement
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