Abstract: A boring bar system sized and configured for removable in-situ placement within a cylindrically-shaped worksite, such as a hydro turbine-powered dam. The system configured for use in inspecting or maintaining a fixedly and non-removably located work surface at the work site comprises a boring bar. The boring bar includes a vertically oriented rotating main shaft, a pair of stationary spiders, a pair of supports, and a tool arm. The tool arm contains a tool and a variety of mounting locations, or machine slides, to selectively vertically and radially position the tool. The system further comprises a drive control unit (DCU) configured to rotate the main shaft using a drive unit and a variable control drive logic that continuously alters a frequency of the DCU to produce a non-uniform pulsation of the drive unit. As the DCU rotates the main shaft, the tool contacts the work surface.

Abstract: The present disclosure relates to a telecommunications distribution hub having a cabinet that defines a primary compartment. The cabinet also includes one or more main doors for accessing the primary compartment. Telecommunications equipment is mounted within the primary compartment. The distribution hub further includes a secondary compartment that can be accessed from an exterior of the cabinet without accessing the primary compartment. A grounding interface is accessible from within the secondary compartment.

Abstract: A battery charger is described for one or more rechargeable batteries. The charger derives its power from a DC power source such as another battery, and produces a pulsed recharging current that has a periodic variable frequency pulse. The charger also permits higher voltage charging current to be achieved than the initial voltage of the DC power source, and monitors both the power source and the batteries being recharged to avoid depletion of the power source or over charging of the batteries.