초록 ▼

A rotating riffler for the purpose of withdrawing smaller laboratory-sized representative particulate samples from larger samples. This comprises a rotating disk having an interchangeable top plate of plastic foam having openings therein to accommodate sample containers. Where different size sample

A rotating riffler for the purpose of withdrawing smaller laboratory-sized representative particulate samples from larger samples. This comprises a rotating disk having an interchangeable top plate of plastic foam having openings therein to accommodate sample containers. Where different size sample containers are employed, the plastic foam plate is changed to accommodate them. The rotating disk is mounted on a base containing a variable speed drive and is supported at the periphery by bearings rather than by the shaft. A slurry or dry volume of particles of which a smaller representative sample is required, is fed into a funnel-like device, then drops in a controlled flow into the sampling containers rotating below the funnel. “V”-shaped bridging devices having curved legs are attached between each pair of containers to prevent spilling.

대표청구항 ▼

An apparatus for obtaining representative samples of material from a bulk quantity thereof comprising a revolvable first disk, individual readily portable containers resting upon said disk in close proximity to the periphery thereof, and so placed that their upper edges are adjacent to one another;

An apparatus for obtaining representative samples of material from a bulk quantity thereof comprising a revolvable first disk, individual readily portable containers resting upon said disk in close proximity to the periphery thereof, and so placed that their upper edges are adjacent to one another; a second disk resting upon said first disk, a ring member affixed to said first disk having an inside diameter slightly larger than that of said second disk such as to provide a snug fit and permit easy removal of said second disk, said second disk having openings defined therein of such size and shape as to closely fit the outside of said containers when said containers rest upon said first disk, said containers being replaceable by at least one different set of containers and said second disk being replaceable by at least one other disk having openings defined therein to closely fit said additional set of containers; a hopper for said bulk quantity of material provided with a discharge opening located over the path of travel of said containers for discharging a flow stream of the material thereinto; means to rotate said first disk thereby sequentially and repetitively moving said containers individually into intercepting relation with said flow stream whereby said sample containers each intermittently receives material which is only a portion of a sample from the bulk quantity so that a sample is built up in each of said sample containers over a period of time after repetitive movement of said sample containers into said intercepting relation with said flow stream.