Abstract: A gas flux chamber assembly is provided that includes a lift-and-rotate mechanism and a chamber. The chamber is moved between first and second positions, wherein the chamber is positioned over a sample in the first position and is positioned outside of an area above the sample in the second position. In operation, the chamber is first lifted off of the collar and is then rotated, about a rotational axis outside of the area above the collar. These acts are reversed to move the chamber from the second position to the first position.

Abstract: A gas flux chamber assembly with a soil collar and a chamber is provided. The chamber is moved between first and second positions, wherein the chamber is positioned on the soil collar in the first position and is positioned outside of an area above the soil collar in the second position. In operation, the chamber is first lifted off of the soil collar and is then rotated, about a rotational axis substantially parallel to the soil collar axis, outside of the area above the soil collar. These acts are reversed to move the chamber from the second position to the first position.

Abstract: A gas flux chamber assembly is provided comprising a soil collar and a chamber. The chamber is moved between first and second positions, wherein the chamber is positioned on the soil collar in the first position and is positioned outside of an area above the soil collar in the second position. In operation, the chamber is first lifted off of the soil collar and is then rotated, about a rotational axis substantially parallel to the soil collar axis, outside of the area above the soil collar. These acts are reversed to move the chamber from the second position to the first position.

Abstract: A box prong anchor includes first and second prongs in spaced relation, and a tether connected between the prongs allowing the prongs to bend toward each other without restriction from the tether and to bend away from each other only with corresponding movement of the other of the prongs.

Abstract: A stud retainer that may be used in numerous applications includes features that increase the extraction forces to better retain the stud in the retainer. In an exemplary embodiment, the stud retainer includes a retainer body having retention features that engage the threads on the stud, and wedge projections that, in use, serve to force the retention features into a more secure engagement with stud threads, creating a wedging effect. With the invention, as the threaded stud is attempted to be withdrawn or pulled from the exemplary stud retainer, the retention features move in a direction towards the wedge projections. Once the retention features contact the wedge projections, the wedge projections force the retention features to wedge against the threads of the stud to better secure the stud to the retainer.

Abstract: A grinding mill for grinding grain and the like includes a pair of grinding discs, each having a cutting face arranged adjacent to the cutting face of the other disc. Each grinding disc has a plurality of cutting teeth circumferentially spaced on the cutting face to define channels between the teeth. The teeth and the channels of each disc extend inwardly from near the periphery of the disc at an angle to the disc radii so that when one disc is rotated with respect to the other, an outwardly-operating scissor action is effected between the teeth of the two discs. One of the discs is movable axially with respect to the other disc and apparatus is provided for preventing movement of the movable disc to a point where it would otherwise contact the other disc.