Abstract: Apparatuses including spark gap structures for electrical overstress (EOS) monitoring or protection, and associated methods, are disclosed. In an aspect, a vertical spark gap device includes a substrate having a horizontal main surface and a plurality of pairs of conductive layers over the horizontal main surface. Different ones of the pairs are separated by different vertical distances such that each pair serves as an arcing electrode pair and different ones of the arcing electrode pairs are configured to arc discharge at different voltages.

Abstract: A portable ice shelter comprises a base, a rigid frame member, a multi-panel skin and a first set of flexible poles. The base comprises a bottom wall and a sidewall that forms an outer perimeter. The rigid frame member is pivotably mounted to the base at first and second locations, and is moveable between a stored position against the base and a deployed position. angled from the base. The multi-panel skin is coupled to the rigid frame member, the multi-panel skin defining an enclosure when expanded. The first set of flexible poles extend from the rigid frame member, and each of the flexible poles in the first set is connected in an expandable fashion so as to expand at least a portion of the multi-panel skin when the rigid frame member is in the deployed position.

Abstract: A portable ice shelter comprises a base, a rigid frame member, a multi-panel skin and a first set of flexible poles. The base comprises a bottom wall and a sidewall that forms an outer perimeter. The rigid frame member is pivotably mounted to the base at first and second locations, and is moveable between a stored position against the base and a deployed position. angled from the base. The multi-panel skin is coupled to the rigid frame member, the multi-panel skin defining an enclosure when expanded. The first set of flexible poles extend from the rigid frame member, and each of the flexible poles in the first set is connected in an expandable fashion so as to expand at least a portion of the multi-panel skin when the rigid frame member is in the deployed position.

Abstract: Apparatus and methods for drilling a hole. A hybrid powered and manual auger is disclosed. The auger may include one or more cutting blades coupled to a drive shaft driven by a motor. The auger may further include a manual crank configured to rotate the motor and the drive shaft about a drive axis. The manual crank comprises a U-shaped offset formed by an upper crank arm and a lower crank arm joined by a crank handle portion. The drive shaft can be rotated by the motor alone, by rotation of the manual crank alone, and by a combination of the motor and rotation of the manual crank.

Abstract: A biomass stove includes a housing enclosing a firebox that defines a ceiling portion opposite a bottom, a firepot disposed within the firebox, an air intake assembly coupled to the firebox, and at least one duct disposed entirely inside the firebox and extending between the ceiling portion of the firebox and the air intake assembly. The duct(s) provide a heat exchanging flow path for ambient air entering the air intake assembly, where the ambient air is heated within the duct(s) prior to exiting through the ceiling portion of the biomass stove.

Abstract: A biomass stove includes a housing enclosing a firebox that defines a ceiling portion opposite a bottom, a firepot disposed within the firebox, an air intake assembly coupled to the firebox, and at least one duct disposed entirely inside the firebox and extending between the ceiling portion of the firebox and the air intake assembly. The duct(s) provide a heat exchanging flow path for ambient air entering the air intake assembly, where the ambient air is heated within the duct(s) prior to exiting through the ceiling portion of the biomass stove.

Abstract: Compositions capable of giving extended release of sulphur dioxide, for use as sterilizing compositions especially in the temporary disposal of soiled sanitary and surgical dressings, comprising a sulphur-dioxide-liberation compound, for example a metabisulphite or a dithionite, and a sulfur-dioxide-liberation moderator, especially a thiosulphate and/or a phosphate.