Abstract: The danger associated with an electrical plug partially withdrawn from an electrical outlet to exposed prongs of the plug while in electrical connection is reduced using a safety device comprising a resilient, compressible block of electrical insulating material mounted to a connection side of the plug. The prongs are inserted into passageways in the block that extend from one side of the block to another side of the block. With the block mounted to the plug, the user pushes the prongs into the outlet so the prongs are essentially completely within the outlet and the block is essentially completely compressed. The compressed block expands to cover the exposed, electrically connected plug portions upon partial removal of the prongs from the electrical outlet.

Abstract: A dynamic mixer includes a housing structure having a mixing chamber, having an inlet opening through which a material or materials to be mixed is passed into the mixing chamber and an outlet. A mixer rod has mixing rod portion disposed in the housing structure and a plurality of mixing paddle portions each having a mixing surface. The mixing rod is adapted for attachment to a drive unit which imparts a rotational mixing force to the rod. In one exemplary non-limiting embodiment of a mixer, the housing structure includes a hollow tubular structure with first and second open ends, a hollow T fitting having a first opening attached to the first end of the hollow tubular structure, a second opening opposed to and in alignment with the first opening and a third opening transverse to the first and second openings, and a coupler fitting attached to the second open end of the tubular structure.

Abstract: A dynamic mixer includes a housing structure having a mixing chamber, having an inlet opening through which a material or materials to be mixed is passed into the mixing chamber and an outlet. A mixer rod has mixing rod portion disposed in the housing structure and a plurality of mixing paddle portions each having a mixing surface.. The mixing rod is adapted for attachment to a drive unit which imparts a rotational mixing force to the rod.