Abstract: Disclosed herein is a pressure control system for a liquid natural gas (LNG) storage tank. The pressure control system comprises a second heat exchanger, comprising a first inlet fluidly coupled with the LNG storage tank and a first outlet fluidly coupled with the LNG storage tank. The pressure control system also comprises a coolant, fluidly coupled with a second inlet of the second heat exchanger. The heat exchanger is configured to transfer energy from the coolant to the LNG from the LNG storage tank to vaporize the LNG into compressed natural gas (CNG). The pressure control system also comprises a first control valve selectively operable to allow LNG to flow from the LNG storage tank to the heat exchanger and to allow CNG to flow from the heat exchanger to the LNG storage tank when a pressure within the LNG storage tank is below a lower pressure threshold.

Abstract: A notebook sleeve including a first generally rectangular side panel having a top edge, a pair of side edges and a bottom edge and a second generally rectangular side panel having a top edge, a pair of side edges and a bottom edge. The second side panel is generally parallel to and generally aligned with the first side panel, The notebook sleeve further includes a bottom generally rectangular panel located between and coupled to the bottom edges of first and second side panels, the bottom panel having a pair of long edges and a pair of short edges. The notebook sleeve further includes a pair of generally parallel connecting panels, each connecting panel being located between and coupled to a side edge of each of the first and second side panels, wherein the first side panel, the second side panel, the bottom panel and the pair of connecting panels define a cavity therebetween.

Abstract: A binder including a first cover and a second cover pivotally coupled to the first cover, both of the covers being generally flat and planar and having a first and second opposite sides thereof. The binder further includes a pocket coupled to the first cover, wherein the pocket can be accessed from both the first and second sides of the first cover.

Abstract: A system for storing index cards, the system including at least one storage sheet having at least one pocket, at least one supply sheet having at least one index card formed therein and detachable therefrom. The system further includes a binding mechanism that binds the storage sheet and the supply sheet together.

Abstract: A notebook with a wire guard including a front cover having a plurality of openings located generally adjacent to a binding edge of the front cover, a back cover having a plurality of openings located adjacent to a binding edge of the back cover, and a plurality of sheets of paper. Each sheet of paper a plurality of openings located adjacent to a binding edge thereof. The notebook further includes a generally helical binding coil having a plurality of turns, and each of the plurality of openings of the front cover, back cover, and the plurality of sheets of paper receives a turn of the coil therethrough to bind the front cover, back cover and plurality of sheets of paper together.

Abstract: Filtration media is comprised of a mixture of glass and synthetic polymeric fibers. Binder fibers are also preferably incorporated into the mixture of glass and synthetic polymeric fibers so as to achieve a structurally coherent mass of such fibers. Most preferably, a combination of thermoplastic and at least partially water soluble binder fibers will be present in the fibrous filtration media of this invention so as to promote structural integrity during processing and end use applications. In this regard, the fibrous filtration media is preferably made by wet-laying an aqueous slurry mixture of glass fibers and synthetic fibers onto a foraminous forming member (e.g., a forming wire) using conventional Fourdrinier or foam-type fiber wet-laying processes. Thereafter, the slurry mixture is dewatered to form a fibrous dewatered sheet of the glass and synthetic fibers. If present, the binder fibers are physically dispersed in the slurry mixture when laid onto the forming member.

Abstract: A system detects relative movement between an optical sensor unit and a set of finely spaced, parallel grid lines. Unlike prior optical line detection systems, each set of lines is applied to a surface of an object at an angle relative to movement between the optical sensor unit and the object. The system is particularly useful for monitoring rotating members, such as shafts, but is also useful with linearly moving members. In a preferred shaft monitoring application, a plurality of optical units are provided, with a plurality of corresponding sets of parallel lines at different angles on the shaft. Signal output phase differences between the optical units are compared to precisely determine movement of the shaft in seven directions of freedom, including rigid body displacement components along three translational and three rotational axes, and shaft twist.

Abstract: Methods and apparatus for precisely applying finely spaced grid lines to an existing shaft on site include, in a first embodiment, attachment of a master grid line carrier to the shaft. In preferred embodiments, the carrier is helically wrapped about the shaft or mated at a diagonal seam across the carrier. Photosensitive material is then applied to the shaft at one or more axial locations. The shaft is rotated and passage of the grid lines on the master is sensed. A light source synchronized to the detection of the master grid lines exposes the photosensitive material as the shaft is rotated to create identical sets of finely spaced grid lines at multiple axial locations on the shaft. The invention also includes a synchronous laser Dopper velocimeter (SLDV) which accurately senses the passage of the lines on the shaft. An extremely accurate torsional interferometer can be constructed using the SLDVs.

Abstract: An optical system for monitor vibration, particularly applicable to power shafts in rotating power systems such as those found in trucks, naval vessels, turbogenerators, hydroelectric and nuclear generators, and helicopters, has an optical unit including IRLED radiation sources aimed at grid lines applied around the circumference of the shaft. The reflection of the radiation is imaged through lenses and a matching Ronchi grid onto a photodiode which produces a periodic wave signal from which indications of rotational irregularities can be derived. In one embodiment, duplicate radiation sources and imaging apparatus are arranged in diametric opposition across the shaft to permit compensation for pitch and plunge shaft vibration. In another preferred embodiment, a second, duplicate optical unit is located at a distance along the shaft from the first unit.