Apparatus for providing multiple samples of material from a moving conveyor
AssigneeTema Systems, Inc.
InventorsJames J. Ford, Jr., David W. Beitz, Michael J. Nagle, Jr.
Life of this patent
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Abstract
A sampling machine for moving a sampling scoop through bidirectional full rotations which are effective to remove multiple sample volumes from a moving conveyor. The sampling scoop has a home position which is maintained by the its drive without requiring a separate brake. A programmable control provides a full range of multiple sampling cycles at high sampling rates. The sampling scoop cavities are comprised of three straight flat surfaces including a pusher surface which is substantially vertical as the sample volume is pushed off an edge of the moving conveyor.
Claims19
A sampling apparatus for removing a sample volume of a material from a conveyor, the apparatus comprising:
- a frame located adjacent the conveyor;
- drive means mounted on said frame for providing a rotating drive shaft;
- a scoop connected to said drive shaft and rotating about an axis of rotation above the conveyor, said scoop being mounted relative to the conveyor such that rotation of said scoop transverse to conveyor motion is effective to remove the sample volume of the material from the conveyor;
- control means connected to said drive means for selectively commanding said drive means to move said scoop through a circular path during first and second rotational cycles, said first rotational cycle moving said scoop through said circular path from a starting position through a continuous rotation in a first angular direction and stopping said scoop at said starting position, and said second rotational cycle moving said scoop through said circular path from said starting position through a continuous rotation in a second angular direction opposite to said first angular direction and stopping said scoop at said starting position, said starting position being a position of said scoop above said drive shaft such that said drive means holds said scoop at said starting position;
- and
- first and second sample collectors located on opposite sides of and below the conveyor to receive the sample volumes of the material during said first and second rotational cycles, respectively.
Dependencies are inferred from the claim text.