Abstract: Systems and methods are provided for pumps that deliver optimized torque characteristics and volumetric efficiency. A system includes a housing defining a surface and a rotor defining a face. A face clearance is defined between the face and the surface. The face clearance is variable in magnitude and determinative of target performance characteristics of the pump system. The housing is made of a material selected to have a thermal expansion characteristic and the rotor is made of a second material selected to have another thermal expansion characteristic. The thermal expansion characteristics deliver the target performance characteristics of the pump system.

Abstract: Systems and methods are provided for pumps that deliver optimized torque characteristics and volumetric efficiency. A system includes a housing defining a surface and a rotor defining a face. A face clearance is defined between the face and the surface. The face clearance is variable in magnitude and determinative of target performance characteristics of the pump system. The housing is made of a material selected to have a thermal expansion characteristic and the rotor is made of a second material selected to have another thermal expansion characteristic. The thermal expansion characteristics deliver the target performance characteristics of the pump system.

Abstract: A chair may include a base defining a vertical axis of the chair, a seat configured to support a user thereon, and a seat support assembly disposed between the base and the seat in the direction of the vertical axis. The seat support assembly may include a height adjustment assembly configured to allow the seat to translate along the vertical axis, and a wobble assembly configured to allow the seat to tilt relative to the vertical axis in a side-to-side direction. The wobble assembly may include a wobble lock having a locked configuration, in which the wobble lock inhibits tilting of the seat relative to the vertical axis in the side-to-side direction, and an unlocked configuration, in which the wobble lock allows tilting of the seat relative to the vertical axis in the side-to-side direction.

Abstract: A marker for burying adjacent an underground structure such that a location of the underground structure can be identified from above a ground surface. The marker comprises a housing, a gimbal beacon retention device pivotally disposed within the housing, and a beacon device carried by the gimbal beacon retention device. The gimbal beacon retention device is structured and operable to orient the beacon device in a desired orientation relative to a ground surface regardless of the orientation of the housing relative to the ground surface.

Abstract: A marker for burying adjacent an underground structure such that a location of the underground structure can be identified from above a ground surface. The marker comprises a housing, a self-orienting beacon retention device disposed within the housing. The self-orienting beacon retention device comprises a coil bobbin, and an inductance-capacitance beacon device carried by the self-orienting beacon retention device. A coil of the LC beacon device is disposed around an exterior surface of the coil bobbin. The self-orienting beacon retention device is structured and operable to orient the coil bobbin and the inductor coil in a desired orientation relative to a ground surface regardless of the orientation of the housing relative to the ground surface.

Abstract: A marker for burying adjacent an underground structure such that a location of the underground structure can be identified from above a ground surface. The marker comprises a housing, a gimbal beacon retention device pivotally disposed within the housing, and a beacon device carried by the gimbal beacon retention device. The gimbal beacon retention device is structured and operable to orient the beacon device in a desired orientation relative to a ground surface regardless of the orientation of the housing relative to the ground surface.

Abstract: A marker for burying adjacent an underground structure such that a location of the underground structure can be identified from above a ground surface. The marker comprises a housing, a self-orienting beacon retention device disposed within the housing. The self-orienting beacon retention device comprises a coil bobbin, and an inductance-capacitance beacon device carried by the self-orienting beacon retention device. A coil of the LC beacon device is disposed around an exterior surface of the coil bobbin. The self-orienting beacon retention device is structured and operable to orient the coil bobbin and the inductor coil in a desired orientation relative to a ground surface regardless of the orientation of the housing relative to the ground surface.

Abstract: The present invention provides a circuit for performing a stress test on a paired line. The circuit provides for first and second balanced outlet pathways for applying an AC signals to the paired line. Although each of these first and second balanced outlet pathways include balanced capacitors, the need to vet these capacitors in order to achieve proper operation of the circuit is eliminated.

Abstract: A high R-rating window assembly storing multiple, reciprocating reflective flexible film layers defined by one or more parallel, displaced films or looped films define the layers. The layers are contained in a sealed housing between rigid transparent (e.g. glazed) layers. The glazed layers are separated on the order of 3 to 5-inches and are secured to low thermal conductivity framework pieces. The framework is capped with a motorized roller and film housing and the assembly is evacuated and filled with a desiccated, inert dry gas. Several plastic, reflective coated films are supported under tension in planar parallel relation between the glazing layers from the motorized roller and several guide rollers and guide tracks. Location sensors responsive to indicia on the films identify film position. Temperature sensors monitor ambient, internal and user set thermal conditions to control film exposure.

Abstract: A high R-rating window assembly storing multiple, reciprocating reflective flexible film layers in a sealed housing between rigid (e.g. glazed) layers. The glazed layers are separated on the order of 3 to 5-inches and are secured to low thermal conductivity framework pieces. The framework is capped with a motorized roller and film housing and the assembly is evacuated and filled with a desiccated, inert dry gas. Several plastic, reflective coated films are supported under tension in planar parallel relation between the glazing layers from the motorized roller and several guide rollers and guide tracks. Location sensors responsive to indicia on the films identify film position. Temperature sensors monitor ambient, internal and user set thermal conditions to control film exposure. The films are operable via a room control system and window controllers to define open, closed and partial exposure conditions. Alternative control functions may control film exposure in relation to room occupancy.

Abstract: A rotating magnetron assembly having a structure to reduce bearing degradation by substantially preventing the flow of current through the bearing using non-conductive materials or providing a low resistance current flow path or by allowing current to flow through the bearing in a way which prevents arcing between the various bearing components.

Abstract: A high R-rating window assembly storing multiple, reciprocating reflective flexible film layers in a sealed housing between rigid (e.g. glazed) layers. The glazed layers are separated on the order of 3 to 5-inches and are secured to low thermal conductivity framework pieces. The framework is capped with a motorized roller and film housing and the assembly is evacuated and filled with a desiccated, inert dry gas. Several plastic, reflective coated films are supported under tension in planar parallel relation between the glazing layers from the motorized roller and several guide rollers and guide tracks. Location sensors responsive to indicia on the films identify film position. Temperature sensors monitor ambient, internal and user set thermal conditions to control film exposure. The films are operable via a room control system and window controllers to define open, closed and partial exposure conditions. Alternative control functions may control film exposure in relation to room occupancy.

Abstract: A process for the preparation of a compound of formula (1) comprises reacting compounds of formulae (2) and (3) in the presence of an enzyme, wherein A is a thiol-protecting group, B, C and D are each the same or different organic groups of up to 30 C atoms, optionally functionalized at any position, provided that neither a primary amine nor a primary amide is present, and X is a group that can be displaced by NH2.

Abstract: There is provided a process for the cyclisation of 4-amino-2-halobutyric acid to azetidine-2-carboxylic acid wherein more than 20 g of 4-amino-2-halobutyric acid is cyclised per liter of reaction mixture.

Abstract: A cycloalkanol is prepared by cycloaddition between a diene and a vinyl ester, wherein the ester is derived from a carboxylic acid of sufficient molecular weight to enable the reaction to be carried out at atmospheric pressure while above 150.degree. C., and the corresponding reaction between the diene and vinyl acetate generates a pressure above 4 atmospheres.

Abstract: A process is described for obtaining a single enantiomer from a racemic mixture of the bicyclic lactam 2-azabicyclo?2.2. 1! hept-5-en-one by seeding a supersaturated solution of the lactam and a solvent with a single enantiomer of the lactam.

Abstract: Enantiomeric glutarimides such as aminoglutethimide and rogletimide are prepared by cyclisation of a corresponding ester-nitrile which is a good substrate for biotransformation with an enantiospecific esterase.

Abstract: Test apparatus for electrically and mechanically testing the condition of alternators and starters used in automobiles, trucks and the like. The apparatus, in its preferred form, includes a pair of holding fixtures for securing a starter or alternator during test, the fixtures being configured to allow quick and easy insertion and removal of the unit. Electrical circuitry is connectable to the machine under test by quick connect leads, such as alligator clips, and includes interlocking switch means for allowing starters to be tested in one condition, and alternators in another condition. The electrical circuitry includes indicators for showing the electrical condition of the machine being tested. The apparatus is structured so that a device may be tested with a minimum of effort, allowing a typical test to be completed in less than a minute.