Abstract: An air preheater water jet apparatus is provided for cleaning fly ash, soot and the like from a rotating or stationary heat exchange basket on a air preheater used to improve the efficiency of a boiler in an electric utility generating plant. The air preheater cleaning apparatus includes a cleaning assembly with water jet nozzles, thereon, attached to a carriage which moves along a track, such as a channel beam, affixed radially above and adjacent to the air preheater basket. A drive assembly and an idler bracket assembly with a roller chain therebetween are disposed on the channel beam. The carriage assembly is attached to the roller chain and as the carriage is driven, the cleaning assembly is moved along the channel beam. Thus, when the basket, or the air preheater cleaning apparatus, is rotated and the carriage is moved inward, a circular path of the basket is cleaned.

Abstract: An integrated control system, specifically transportable on water between offshore wells, includes mixing and blending subsystems, a pumping subsystem, a proppant subsystem and a control subsystem for controlling the other subsystems in a unified manner from a common control location.

Abstract: A data monitoring system includes a display unit for communicating with an operation that has characteristics which are to be monitored, a recording unit located remotely from the environment of the monitored operation, and a local area network interconnect circuit for connecting the display and recording units. The local area network circuit allows multiple display units to be connected to a single pair of electrical conductors. Each display unit has at least one dual microcomputer configuration interconnected by a shared dual port random access memory. A third microcomputer is located in the recording unit for communicating over the local area network circuit with one of the microcomputers in the display unit.

Abstract: A data acquisition apparatus includes two microcomputers interconnected by a shared dual access digital storage device. One microcomputer obtains the data related to the monitored condition, stores it in the digital storage device, and modifies a status word which is monitored by the other microcomputer. When the other microcomputer detects a change in the status word, it takes the data from the shared digital memory and moves it into its own memory for subsequent use or transfer. The data acquisition apparatus also includes, in a preferred embodiment, analog switches and a digital to analog converter by which external analog devices can be controlled to change the monitored operation.

Abstract: An enclosure for electronic equipment includes an outer housing having an inner housing mounted therein. The inner housing has a fan and air deflector members mounted therein for maintaining a controlled circulation of air flow within the interior region of the inner housing so that air within the interior region is moved in heat exchange relationship with a heat sink member extending into the inner housing. The heat sink member in the inner housing is connected by thermal diodes with another heat sink member attached to a side wall of the outer housing. Another fan directs an air flow over the heat sink member attached to the side wall of the outer housing. A third fan is mounted within the interior region of the outer housing, but externally of the inner housing, for providing air circulation within the interior region of the outer housing.