Abstract: A sharpening tool for dull stump grinder teeth including a head extending from a shaft, where the shaft is sized for use with the chuck of a rotating power tool. The top face of the head is coated with an abrasive material, such as diamond grit, and is preferably slightly convex.

Abstract: Feedwell devices are described herein. While the described feedwells can include any suitable component, in some cases, the feedwell has a center portion, a launder, a weir, and/or a mixing zone. While the various components can have any suitable relationship with respect to each other, in some cases, the weir surrounds a portion of the feedwell's center portion and is configured to allow supernatant from a thickener (e.g., a thickener in which the feedwell device has been placed) to flow into the launder. In turn, in some implementations, the launder is configured to direct the supernatant to the mixing zone. Additionally, in some implementations, the mixing zone is configured to mix the supernatant with a feed slurry, prior to introducing a mixture of the supernatant and the feed slurry into the center portion of the feedwell. Other implementations are described.

Abstract: A video circuit enclosure for housing a video circuit, such as a video amplifier circuit that is used to drive a cathode ray tube is disclosed. The video circuit enclosure includes a video box with an open face through which the cathode ray tube is inserted. A video board, on which the video circuit is mounted is secured inside the video box. A heat sink is attached to one end of the video box and is a thermal path with heat-generating components on the video board. A socket board, located inside the video box, is mounted to the cathode ray tube. The socket board is located in the video box so it is slightly spaced away from the video board. A video cover is attached to the socket board and spaced away therefrom so it covers the open face of the video box. A set of spring loaded pin contacts attached to the socket board abut contact pads on the video board so as to provide a low impedance electrical slip connection between the boards.