Abstract: A liquid-cooled camera assembly that includes a camera for viewing the combustion process in an industrial gas turbine that further includes a tri-concentric tube assembly, and a window cap positioned at a first end of the tri-concentric tube assembly. The camera may be positioned adjacent to and behind the window cap. The tri-concentric tube assembly may form channels between the tubes that direct the flow of coolant to the camera from an inlet and from the camera to an outlet. The coolant may be water. The window cap may be cylindrical and may not exceed 1 inch (2.54 cm) in diameter. The window cap may be brazed quartz.

Abstract: Disclosed is an improved vinyl siding panel for building exteriors that covers an increased surface area and is configured such that the time, effort and complexity of its installation is greatly reduced in comparison to that of conventional vinyl siding products. The siding panel consists of large rectangular panels that are used in conjunction with a variety of trim and corner moldings to cover the building surface.

Abstract: A wheel puller for handling a heavy wheel assembly. The puller comprises a beam having one end for securing a heavy wheel assembly thereto, and an opposite end having a weight member connected thereto. The weight member has a mass comparable to the wheel assembly. At a location intermediate the beam ends, the hook of a lifting device is received.

Abstract: A method and apparatus are disclosed for improving the efficiency of operation of AC induction motors. The method and apparatus utilizes a microprocessor to tune a motor control system such that the time interval between the turn-on of a bi-directional switch and the time of sensing the resultant inrush current through the stator is maintained substantially constant as the load is varied.

Abstract: A method and apparatus for improving the efficiency of operation of polyphase AC induction motors. The method and apparatus utilizes a microprocessor to tune a motor control system such that time interval on at least two phases of a multi-phase power source such that the time intervals between turn-on of bi-directional switches and the time of sensing the resultant inrush currents of the two phases on two motor stators are maintained substantially constant as the load is varied.