Abstract: A face mask and method of use are disclosed. A base of the face mask is placed around a lower region of the person's nose. A horizontal wall of the base is positioned under the person's nose and first and second bosses extending upwardly from the wall are positioned in the user's nostrils. Holes in the bosses allow the user to breathe through their nose. A filter assembly extends downwardly from the base and fits over the person's mouth and under their chin. An elastic frame on the filter assembly is press-sealed to the user's skin on either side of their mouth and under their chin. The horizontal wall prevents airflow between the environment and a space in front of the user's mouth. Exhaled and inhaled air is forced to pass through the filter assembly's filter, trapping infectious respiratory moisture droplets in the filter.

Abstract: A plug-in fuse device can be handled without special tools and permits convenient replacement of a burnt-out fuse element. The device has a rigid housing with a pair of plug portions. Each plug portion is shaped to plug into a socket and carries a fuse assembly which includes a pair of terminals for engagement with socket elements, a fuse element between the terminals, and a pair of conductive contacts. The terminals extend from one end surface of the plug portion, and the contacts are located at an axially opposite end surface. The plug portions are connected at their contact-bearing surfaces, and the terminals of one plug portion extend in one axial direction and the terminals of the other plug portion, in the opposite axial direction. The plug portions are also offset to different sides of the general plane of the housing. Thus, when either plug portion is plugged into the socket, its contact-bearing surface is available for continuity testing.