Abstract: A mop frame with a base, a first extension that is slidably coupled to the base, a second extension that is slidably coupled to the base, a first lock that is mounted to the base, and a second lock that is mounted to the base. The first extension and second extension are each operable to slide with respect to the base between a retracted position and an extended position. The first lock and second lock are operable to releasably lock the first extension and second extension, respectively, to the base in any position between the retracted position and the extended position.

Abstract: An embodiment of an electronic assembly may include a power meter, a network interface, and a processing unit to log data received from the power meter and upload the data through the network interface, wherein the processing unit operates an extensible run-time environment for add-on software modules. Another embodiment of an electronic assembly may include a meter interface, a network interface, and a processing unit to perform power calculations on signals received at the meter interface, log meter data from the power calculations, and upload the meter data through the network interface, wherein the processing unit operates an extensible run-time environment for add-on software modules.

Abstract: A multi level indicator and control system for controlling upper and lower liquid level limits in a tank includes a first transparent column connected in selective communication with the liquid in the tank and extending between one of the limits of desired control and a second transparent column disposed below the other limit of desired control. A plurality of reed switches are disposed at different levels within the columns and each is magnetically responsive to a float confined to movement within a narrow range of movement adjacent the switch, for controlling the switches in response to the respective level of liquid in the tank. Valves are provided for selectively cutting off communication of the column with the tank so that the column may be drained and the switches checked or replaced when needed. Extended vent tubes may be provided for venting the column when the column is connected to a tank of a height many times that of the column.