Abstract: One embodiment includes an apparatus that comprises a storage medium to store a database. The apparatus also includes a port to receive, over a network, data related to a number of observations at a work site based on input into an electronic device. The apparatus includes a processor to store the data into the database, wherein the processor is to output a notification message through the same or a different port and over the network to an account of a supervising party based a metric related to the number of observations.

Abstract: An excavator base is fabricated on-site by first erecting a substructure of beams on a concrete foundation. Large flat plates are placed on the substructure, welded together at their adjacent edges, and cut at a perimeter to form a bottom plate. A prefabricated center section is welded to the bottom plate. Upright diaphragms and edge plates are assembled on the bottom plate and welded to each other and to the bottom plate. Large flat plates are assembled on the top of the diaphragms, and edge plates, and are welded thereto and to each other. The welded plates are cut at a perimeter to complete a top plate. The base is then removed from the substructure. Alternately, the top plate can be formed on the substructure first and then removed and set aside for later use. Adjacent plates are held flat for welding using brackets and wedges.

Abstract: A tread belt drive system for heavy mobile equipment includes an endless tread belt made up of a plurality of identical links joined together by link connecting pins. Each of the links has a ground engaging bottom and a top having a cog, or cog portion, positioned medially of the link ends, which cog has fore and aft driving surfaces. A pair of longitudinally extending tumbler rim and roller engaging surfaces which extend above the cog are positioned on the top of the link, one on each side of the cog. The links have fore and aft pin connections with the pin center below the engaging surfaces in alignment with the driving surfaces. The drive system also includes rollers which support the weight of the equipment and drive and idler tumbers each having a rim and teeth.