Abstract: A system for implementing current sharing between packaged power converter modules is provided. The system includes a respective current monitoring circuit for generating a current signal indicative of the current supplied by each power converter module, and a respective inverter for inverting the current signals. The current signals and the inverted current signals from each module are provided to a differential current share bus. For each module, an error amplifier is provided to supply a remote sense terminal of the module with a control signal indicative of the difference between the current share bus reference level and a respective current signal.

Abstract: The present invention provides a packing system for storage of powders and granular materials comprising a container, a lid that may be reversibly secured to the body and a mountable scoop for retrieving amounts of the container's contents. The lid typically has a top side, an underside, and a rim wall which reversibly engages the body of the container for secure fit. The lid further comprises a nub on the underside thereof, which may be located in the center or off-center of the lid. The mountable scoop typically comprises a handle and a bowl for scooping, the handle having an aperture therethrough designed to snap-fit the nub such that the scoop may be reversibly mounted on the underside of the lid. In another embodiment, the bowl of the scoop may be collapsible to minimize its vertical profile when mounted onto the underside of the lid.

Abstract: A conventional elevator system includes an elevator shaft, an elevator cab and means for moving the elevator cab along the shaft. The elevator cab has a sliding cab door to provide access thereto and electrically operated means for moving the cab door. A door buck opening into the shaft is provided with a shaft door movable relative to the buck to expose the cab door when the cab is aligned therewith. An interlock mechanism is provided connected between the shaft door and buck which, when actuated by the closing of the shaft door, completes an electrical circuit thereby permitting actuation of the means for moving the cab door to close same and, in turn, the means for moving the cab along the shaft. The present invention relates to a secondary interlock means located within the shaft wall above the door buck and operably connected to prevent completion of the electrical circuit of the primary interlock means by external means to bypass the primary interlock mechanism when the shaft door is opened.