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: Apparatus for teaching robot station location relative to a work piece apparatus includes an attachment that can be temporarily coupled to the apparatus and positioned in known relationship to the robot station location. A plurality of positional sensors are mounted on the attachment ring, the sensors each configured to produce a signal when a work piece carried by a robot arm is positioned a predetermined distance from the sensor. A signal receiver is configured to receive signals from the sensors and to indicate which of the sensors has produced the signal. The indication may be the activation of an LED display that indicates to an operator what the next movement of the robot arm should be in order to center the work piece with respect to the robot station location.

Abstract: The present invention includes an arrow guide and bow sight adaptable to right-handed or left-handed archery bows. The arrow guide including a vertical support wheel with a V-shaped groove running along its circumference in which an arrow may rest when shooting. This wheel is designed to spin freely on a support rod, reducing friction imparted to the arrow shaft, thus increasing the accuracy, speed, and power of the archer's shot. For lateral support, two horizontal wheels are positioned to either side of the vertical support wheel to prevent the arrow from falling off of the vertical support wheel when the bow is jarred or when the bow string is quickly drawn back. Also connected to the arrow guide device is a sighting device comprising a multiplicity of sight pins and a vertical cross-hair. The sight pins are vertically adjustable to be calibrated to assorted ranges, and both the pins and the cross-hair are horizontally adjustable to account for windage.