Abstract: Various shaped abrasive particles are disclosed. Each shaped abrasive particle includes a body having at least one major surface and a side surface extending from the major surface.

Abstract: A target (1) for use with a projectile has a web (7) defining a target face and a back board (29). The target face is divided into multiple segments (3, 5). A cup (19) filled with a projectile-receptive insert material (27) is mounted for sliding within each segment. Each cup has one or more resilient cushions (35) between the cup and the back board. Each cushion has at least one electroconductive area. The back board has pairs of switch contacts (25), forming electrical switches. The projectile impacting a cup at the target face with sufficient force causes the cup to slide within the segment urging the electroconductive area of the one or more cushions to touch the switch contacts, resulting in closing of the switch defined by the switch contacts and signaling a hit to onboard electronic circuitry. The at least one cushions beneath that cup return the cup substantially to its original position.

Abstract: A target for grade metal tipped darts has a conductive rigid web made up of concentric rings intersecting spokes emanating from the second to the innermost ring. The spokes define twenty sectors, while the rings define 4 segments within each sector. There are also two segments in the innermost and second to innermost rings. Conductive blocks, made up of an aluminum or zinc cup having contacts protruding from its bottom and containing a rubberized cork insert, fill in the segments of the web. Beneath each cup is a silicon foam cushion cut away between the contacts and a pad on a printed circuit board. The pads are each connected to circuitry that senses when a dart hits an insert causing the corresponding cup to slide within the web and contact a pad.

Abstract: A target for regulation grade metal tipped darts has a conductive rigid web made up of concentric rings intersecting spokes emanating from the second to the innermost ring. The spokes define twenty sectors, while the rings define 4 segments within each sector. There are also two segments in the innermost and second to innermost rings. Conductive blocks, made up of an aluminum or zinc cup having contacts protruding from its bottom and containing a rubberized cork insert, fill in the segments of the web. Beneath each cup is a silicon foam cushion cut away between the contacts and a pad on a printed circuit board. The pads are each connected to circuitry that senses when a dart hits an insert causing the corresponding cup to slide within the web and contact a pad.