Rabbe
Denis H. Rabbe, Crawford, TX US
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20090201491 | Spectroscopic Determination of Sucrose - A method for determining sugar concentration using spectropolarimetry and multivariate regression modeling A set of fixed polarizers are used in association with a spectrometer, which enables the measurement of optical rotation as absorbance values over a range of wavelengths. The adverse effects of color within the samples is corrected by measuring a background level of absorbance that is not due to optical rotation and using this as a baseline. A regression model is then developed for predicting sugar concentration in unknown samples. This method is effective even if the sample is colored. | 08-13-2009 |
Dennis H. Rabbe, Crawford, TX US
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20090302207 | Spectroscopic determination of enantiomeric purity - A new method and strategy for the quantitative determination of enantiomeric purity that combines polarimetry, spectroscopy, and chemometric modeling. Spectral data is collected after a light beam is passed through a first polarimeter, a sample of a chiral compound, and a second polarimeter oriented at a 45 degree angle relative to the first polarimeter. The spectral data for samples of known enantiomeric composition is subjected to a type of multivariate regression modeling known as partial least squares (“PLS-1”) regression. The PLS-1 regression produces a mathematical model that can be used to predict the enantiomeric composition of a set of samples of unknown enantiomeric purity. | 12-10-2009 |
Dennis H. Rabbe, Waco, TX US
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20080204712 | Dispersive near-infrared spectrometer with automatic wavelength calibration - The present invention is a dispersive, diffraction grating, NIR spectrometer that automatically calibrates the wavelength scale of the instrument without the need for external wavelength calibration materials. The invention results from the novel combination of: 1) a low power He—Ne laser at right angles to the source beam of the spectrometer; 2) a folding mirror to redirect the collimated laser beam so that it is parallel to the source beam; 3) the tendency of diffraction gratings to produce overlapping spectra of higher orders; 4) a “polka dot” beam splitter to redirect the majority of the laser beam toward the reference detector; 5) PbS detectors and 6) a software routine written in Lab VIEW that automatically corrects the wavelength scale of the instrument from the positions of the 632.8 nm laser line in the spectrum. | 08-28-2008 |
Klaus Rabbe, Hoexter DE
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20100297891 | CONNECTOR FOR HIGH ELECTRICAL POWER APPLICATIONS - A connector assembly includes a preassembly frame to which the ends of a number of high-voltage transmission lines are connected, whereupon the preassembly frame is mounted in an open-ended chamber contained in a connector housing. The frame includes a first end wall having openings that receive intermediate portions of the transmission lines, which first end wall carries a grounding plate having projections for engaging exposed portions of braided shielding layers of the transmission lines. The free ends of the transmission lines are provided with contact members that are supported by insulation sleeves in wall openings contained in a second end wall of the preassembly frame. A coding arrangement prevents the connector assembly from being connected to an unauthorized companion electrical device. | 11-25-2010 |
Sophie Rabbe, Mougins FR
Patent application number | Description | Published |
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20090287629 | Assignments of places - A method of assigning a place to a customer, including the steps of: determining a set of business rules associated with the provision of the place to the customer; determining a set of available places, the or each of the set of available places having one or more attributes; determining one or more customer preferences in respect of the one or more attributes; applying the business rules to define a set of allowed combinations of place and customer; determining a score in relation to the set of allowed combinations of place and customer; selecting the highest scoring allowed combination from the set of allowed combination of place and customer; and assigning the place to the customer based on the highest scoring allowed combination. | 11-19-2009 |