Abstract: An exemplary sterilization system includes a self-propelled robotic mobile platform for locating and eradicating infectious bacterial and virus strains on floors (and objects thereon), walls, cabinets, angled structures, etc., using one or more ultraviolet light sources. A controller allows the system to adjust the quantity of ultraviolet light received by a surface by, for example, changing the intensity of energy input to a ultraviolet light source, changing a distance between a ultraviolet light source and a surface being irradiated, changing the speed/movement of the mobile platform to affect time of exposure, and/or by returning to contaminated areas for additional passes. The mobile platform may include a sensor capable of detecting fluorescence of biological contaminants irradiated with ultraviolet light to locate contaminated areas. The system is thus capable of “seek and destroy” functionality by navigating towards contaminated areas and irradiating those areas with ultraviolet light accordingly.

Abstract: An exemplary sterilization system includes a self-propelled robotic mobile platform for locating and eradicating infectious bacterial and virus strains on floors (and objects thereon), walls, cabinets, angled structures, etc., using one or more ultraviolet light sources. A controller allows the system to adjust the quantity of ultraviolet light received by a surface by, for example, changing the intensity of energy input to a ultraviolet light source, changing a distance between a ultraviolet light source and a surface being irradiated, changing the speed/movement of the mobile platform to affect time of exposure, and/or by returning to contaminated areas for additional passes. The mobile platform may include a sensor capable of detecting fluorescence of biological contaminants irradiated with ultraviolet light to locate contaminated areas. The system is thus capable of “seek and destroy” functionality by navigating towards contaminated areas and irradiating those areas with ultraviolet light accordingly.

Abstract: A battery pack suitable for use with button cell batteries. The battery pack includes a flexible card and a cover rotatably fixed relative to said flexible card. A backing is interposed between the card and said cover, and fixed relative to said card. The backing and cover define an enclosed space interposed between the cover and the backing for receiving batteries. Batteries disposed in the space are enclosed by the cover and backing to inhibit pilfering by bending the card.

Abstract: A battery pack suitable for use with button cell batteries. The battery pack includes a flexible card and a cover rotatably fixed relative to said flexible card. A backing is interposed between the card and said cover, and fixed relative to said card. The backing and cover define an enclosed space interposed between the cover and the backing for receiving batteries. Batteries disposed in the space are enclosed by the cover and backing to inhibit pilfering by bending the card.

Abstract: An easy to use, self-adjusting device for creating a visual representation of the region within which a hockey puck must travel to score a goal from any position in front of a goal has two retractable cords which are attached at one end to a hockey stick and at the other to retractable spring take-up reels. The reels are releasably attached to the goal by a hook and loop fastener. Each cord extends from the reel to an elastic bungee-cord-type band that extends to a releasable clip connected to a removable bracket on the hockey stick. The cords are extended and retracted from the reel with movement of the hockey stick away from the goal to visually define the region of puck travel, and to permit on-the-fly demonstration of possible puck trajectories to both an offensive player and a goaltender, aiding these students in developing their hockey playing skills.