Abstract: A laser-based coating removal apparatus to remove a coating from a surface without damaging the surface. The apparatus comprises a laser source to provide a laser light, a routing element coupled to the laser source and configured to direct the laser light onto a target region of the surface thereby removing the coating from the target region, and a detection element to detect the coating as the coating separates from the target region of the surface. The detection element is able to prevent the surface from being damaged by limiting or eliminating the laser light directed onto the target region after all the coating has been removed. The detection element is able to detect the separation of the coating from the target region by detecting incandescence, acoustic signature, motion, fluorescence and/or chemical properties produced by the separation of the coating from the surface.

Abstract: A fuse switch unit for use in a panelboard is provided which can be engaged via plug-on terminals with a busbar supply system. The unit includes a switch mechanism having in front thereof lug terminals for coupling fuse links which are adjacent the operating handle of the switch mechanism.

Abstract: Bottom loading couplers transfer petroleum and other products into tank trucks and the like. It is necessary to replace an annular seal which is held in place by a metallic ring to maintain adequate sealing of such couplers. A circularly symmetrical wrench slides over the ring, extends fingers thereunder and is levered to provide an upward force upon the ring which removes it. After replacement of the radial seal and ring is replaced with the same wrench which exerts a force atop the ring via an opposite application of the levering arrangement.