Pretorius
Eugene Pretorius, Mt. Pleasant, SC US
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20090246068 | REFINEMENT OF STEEL - A method of forming and refining molten silicon-bearing steel by addition of a calcium-containing silicon additive. Determine if the amount of calcium in the calcium-containing silicon additive is more or less than the amount of calcium desired in the finished steel. If it is more than the amount of calcium desired in the finished steel, add the amount of calcium-containing silicon additive corresponding to the excess calcium early during steel deoxidation or in refining to combine with oxygen, sulfur and other impurities in refining, and add the calcium-containing silicon additive containing the total amount of calcium desired in the finished steel after the desulfurization of the molten steel and before casting. If the amount of calcium in the calcium-containing silicon additive does not provide the total amount of calcium desired in the finished steel, adding an additional amount of calcium after desulfurization of the molten steel and before casting to the molten steel during refining. | 10-01-2009 |
20100307709 | REFINEMENT OF STEEL - A cast low carbon steel formed by a method of forming and refining molten silicon-bearing steel by addition of a calcium-containing silicon additive. Determine when the amount of calcium in the calcium-containing silicon additive is more or less than the amount of calcium desired in the finished steel. When it is more than the amount of calcium desired in the finished steel, add the amount of calcium-containing silicon additive corresponding to the excess calcium early during steel deoxidation or in refining to combine with oxygen, sulfur and other impurities in refining, and add the calcium-containing silicon additive containing the total amount of calcium desired in the finished steel after the desulfurization of the molten steel and before casting. When the amount of calcium in the calcium-containing silicon additive does not provide the total amount of calcium desired in the finished steel, add an additional amount of calcium after desulfurization of the molten steel and before casting to the molten steel during refining. | 12-09-2010 |
Eugene B. Pretorius, Mt. Pleasant, SC US
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20100024596 | LOW COST MAKING OF A LOW CARBON, LOW SULFUR, AND LOW NITROGEN STEEL USING CONVENTIONAL STEELMAKING EQUIPMENT - A method of making a steel with low carbon less than 0.035% by weight including steps of preparing a heat of molten steel composition in a steelmaking furnace to a tapping temperature as desired for desulfurization at a VTD, tapping open into a ladle the molten steel composition with an oxygen level between about 600 and 1120 ppm, providing slag forming compound to the ladle to form a slag cover over the molten steel composition in the ladle, transporting the molten steel composition in the ladle to a VTD, decarburizing the molten steel composition at the VTD by drawing a vacuum of less than 650 millibars, after decarburizing, adding one or more deoxidizers to the molten steel composition and deoxidizing the molten steel composition, after deoxidizing, adding one or more flux compounds to desulfurize the molten steel composition, and casting the molten steel composition to form a steel with low carbon less than 0.035% by weight. | 02-04-2010 |
Francois Pretorius, Paonia, CO US
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20110118913 | RAILROAD SIGNALING AND COMMUNICATION SYSTEM USING A FAIL-SAFE VOLTAGE SENSOR TO VERIFY TRACKSIDE CONDITIONS IN SAFETY-CRITICAL RAILROAD APPLICATIONS - The present invention discloses an improved method and system for verifying trackside conditions in safety critical railroad applications by reporting the status of trackside signals and switches to a remote train control system to confirm visual signals and control train movement. The system for verifying whether a trackside signaling electrical component is energized comprises a sensor for providing trackside conditions to a remote train control system electrically connected to a circuit for providing trackside conditions to a railroad interlocking adjacent to a trackside signaling electrical component, said sensor powered by voltage applied to said circuit such that said sensor is energized only when said electrical component is engaged. The fail safe method for sensing the status of an electrical component by powering the sensing means with voltage applied to a circuit when the electrical component is energized comprises electrically connecting a sensor to an electrical circuit associated with an electrical component, said circuit energized when said electrical component is engaged, said sensor adjacent to said electrical component; powering said sensor by voltage applied to said circuit such that said sensor is energized only when said electrical component is engaged; and indicating that said electrical component is engaged when sensor is energized by transmitting sensor status to a microprocessor. | 05-19-2011 |
20150191185 | Railroad Signaling and Communication System Using a Fail-Safe Voltage Sensor to Verify Trackside Conditions in Safety-Critical Railroad Applications - A method and system for verifying trackside conditions in safety critical railroad applications by reporting the status of trackside signals and switches to a remote train control system. The system comprises at least one sensor for providing trackside conditions electrically connected to a circuit for providing trackside conditions to a railroad, said sensor being powered by voltage applied to the circuit such that the sensor is energized only when said electrical component is engaged. The system and method further comprises a method and system which is failsafe and which enables the control system to independently verify signals from each sensor. | 07-09-2015 |
Harold T. Pretorius, Cincinnati, OH US
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20090285749 | Apparatus and Method for Functional Neurological Screening - A variable focus collimator device and method for functional neurological screening. The variable focus collimator uses sets of corresponding holes in two plates of gamma shielding material, arranged so that only gamma rays emitted from a defined focal region detected. If a suitable radio-labeled tracer has been administered to the patient, this may be used to obtain and compare basal and stimulated data from a small number of regions in the brain to diagnose the presence or absence of dementias. The regions of the brain observer are typically about a cm cubed in volume, and their activity is monitored using small doses (<2 mCi) of radio-labeled, brain perfusion agents. The regions used are easily and repeatably located relative to well-known anthropological and radiological fiducials. By simply use of symmetry, ratios and cortical to cerebellar comparisons, rapid (˜15 minute) screening for dementia may be accomplished. | 11-19-2009 |
Hermanus S. Pretorius, Hooksett, NH US
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20160069640 | APPARATUS AND METHOD FOR SELF-ADJUSTING, RANGE FINDING AIM POINT FOR RIFLE MOUNTING OPTICS - A self-adjusting range finding optic system for finding aim for a rifle by acquiring the range to a target, calculating the estimated bullet drop based on the range to the target, adjusting the reticle to compensate for the estimated bullet drop and displaying the adjusted reticle on the optic to allow for an accurate shot. | 03-10-2016 |
Jacobus P. C. Pretorius, Lone Rock, WI US
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20090255627 | MANUFACTURING OF PHOTOVOLTAIC SUBASSEMBLIES - Some methods, and corresponding apparatus, for manufacturing photovoltaic subassemblies cause a plurality of desiccant beads to be adhered to an adhesive surface of sheet-like material; the sheet-like material is then, preferably, adhered to an exposed surface of a flexible and electrically non-conductive film, that covers a photovoltaic coating of a first substrate of the subassembly, such that the desiccant beads are held between the sheet-like material and the exposed surface. Some other methods, either alternatively or in addition to the above, include steps for applying the film, that covers the photovoltaic coating, wherein an opening, through the film, is cut, and then aligned, with lead wires of the photovoltaic coating, in the midst of applying the film. | 10-15-2009 |
Jacob Van Reenen Pretorius, Somerville, MA US
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20110179790 | SHAPE MEMORY ALLOY RADIATION POWER HARVESTER - A system and method for converting solar energy into mechanical and electrical energy is described. This method is based on the phase change of a material due to temperature. The change of phase is accompanied with displacement at high forces that can easily be converted into useful mechanical and electrical power. | 07-28-2011 |
20120070133 | THIN-FILM CARBON FORCED WARM-AIR-HEATING UNIT - A forced warm-air heating apparatus, a forced warm-air heating system, and method to heat warm-air using an enclosure containing a plurality of thin film carbon-based heating elements configured and arranged to heat a desired heating space driven by a fan assembly, is described. The plurality of thin film heating elements is further ured and arranged to deflect and divide air flow as it flows through the heating enclosure. | 03-22-2012 |
20140000683 | SINGLE-CELL ENCAPSULATION AND FLEXIBLE-FORMAT MODULE ARCHITECTURE FOR PHOTOVOLTAIC POWER GENERATION AND METHOD FOR CONSTRUCTING THE SAME | 01-02-2014 |
Johannes Christiaan Pretorius US
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20120015062 | EXTRACTS AND COMPOUNDS FROM "AGAPANTHUS AFRICANUS" AND THEIR USE AS BIOLOGICAL PLANT PROTECTING AGENTS - The invention relates to plant extracts, especially based on species of the genus | 01-19-2012 |
Kurt Pretorius, Victoria AU
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20140012772 | LOGISTICS SOURCING IMPROVEMENTS - The present invention provides methods and systems of identifying suppliers of applicable modes of transport that meet specified business requirements, providing a means to compare and evaluate these suppliers. Some forms of the invention provide computer-based methods for assisting a logistics decision of a potential customer, the method comprising the steps of: receiving at least one logistics related requirement from the potential customer, calculating at least one suitable logistics option from a plurality of supplier-provided logistic options, and providing an output of at least one logistics option in a form readable by the potential customer. Logistics-related requirements include a preferred or required origin point, a preferred or required destination point, a preferred or required mode of transport, a preferred or required travel time, a preferred or required delivery date, a preferred or required environmental impact caused by the logistic, a preferred or required cost, a preferred or required payment method or term, a preferred or required accreditation of a supplier, or a preferred or required level of operational performance of a supplier. | 01-09-2014 |
Marco Pretorius, Oberkochen DE
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20090046357 | CATOPTRIC OBJECTIVES AND SYSTEMS USING CATOPTRIC OBJECTIVES - In general, in a first aspect, the invention features a system that includes a microlithography projection optical system. The microlithography projection optical system includes a plurality of elements arranged so that during operation the plurality of elements image radiation at a wavelength λ from an object plane to an image plane. At least one of the elements is a reflective element that has a rotationally-asymmetric surface positioned in a path of the radiation. The rotationally-asymmetric surface deviates from a rotationally-symmetric reference surface by a distance of about λ or more at one or more locations of the rotationally-asymmetric surface. | 02-19-2009 |
20090262443 | CATOPTRIC OBJECTIVES AND SYSTEMS USING CATOPTRIC OBJECTIVES - In general, in a first aspect, the invention features a system that includes a microlithography projection optical system. The microlithography projection optical system includes a plurality of elements arranged so that during operation the plurality of elements image radiation at a wavelength λ from an object plane to an image plane. At least one of the elements is a reflective element that has a rotationally-asymmetric surface positioned in a path of the radiation. The rotationally-asymmetric surface deviates from a rotationally-symmetric reference surface by a distance of about λ or more at one or more locations of the rotationally-asymmetric surface. | 10-22-2009 |
20090268305 | ANAMORPHOTIC IMAGING OBJECTIVE - An anamorphic imaging objective having multiple effective optical surfaces. One of the effective surfaces is implemented as anamorphic and one of the effective surfaces is implemented as a free-form surface, which has an aspheric contour in at least one of the two main sections and which has precisely two planes of mirror symmetry, the main sections lying in the planes of mirror symmetry. | 10-29-2009 |
20110176120 | PROJECTION SYSTEM - A projection system having a first tilting mirror matrix, a second tilting mirror matrix, and an imaging lens, which projects the first tilting mirror matrix onto the second tilting mirror matrix, wherein each tilting mirror matrix has multiple tilting mirrors, the tilting axes of which are positioned in a modulator surface plane. The imaging lens includes a first lens and an imaging mirror, and the imaging mirror forms an aperture stop of the imaging lens, wherein the aperture diaphragm includes an uneven angle of 90° together with the normal of the modulator surface of the first tilting mirror matrix without taking into account any optical path folds. | 07-21-2011 |
20110199575 | NON-REFLECTIVE IMAGING OPTICS FOR OPTICAL DEVICES, PARTICULARLY IN OPHTHALMOLOGY - Imaging optics for optical devices, with which reflections of the illumination light, which is guided through the same optical elements as the observation light, are kept from reaching the observation pupil of the imaging beam path. The non-reflective imaging optics include at least two refractive optical elements, which are utilized for illumination as well as observation. The at least two refractive optical elements are designed approximately wedge-shaped and are tilted at a random azimuth angle of at least 5° and/or are positioned off-center in the beam path to block out the single reflections of the illumination, occurring at the optical system surfaces, for the observation. The imaging optics are for optical devices, particularly in ophthalmology thought the invention is applicable to other ophthalmological devices as well as to optical devices outside of this field. | 08-18-2011 |
20120069314 | IMAGING OPTICS AND PROJECTION EXPOSURE INSTALLATION FOR MICROLITHOGRAPHY WITH AN IMAGING OPTICS OF THIS TYPE - An imaging optics has a plurality of mirrors which image an object field in an object plane in an image field in an image plane. A pupil plane is arranged in the imaging beam path between the object field and the image field. A stop is arranged in the pupil plane. The pupil plane is tilted at an angle (α) with respect to the object plane, where α is greater than 0.1°. The imaging optics results allows for a manageable combination of small imaging errors, manageable production and good throughput. | 03-22-2012 |
20120069315 | IMAGING OPTICS AND PROJECTION EXPOSURE INSTALLATION FOR MICROLITHOGRAPHY WITH AN IMAGING OPTICS - Imaging optics includes a first mirror in the imaging beam path after the object field, a last mirror in the imaging beam path before the image field, and a fourth to last mirror in the imaging beam path before the image field. In an unfolded imaging beam path between the object plane and the image plane, an impingement point of the chief ray on a used region of each of the plurality of mirrors has a mirror spacing from the image plane. The mirror spacing of the first mirror is greater than the mirror spacing of the last mirror. The mirror spacing of the fourth to last mirror is greater than the mirror spacing of the first mirror. Chief rays that emanate from points of the object field that are spaced apart from another have a mutually diverging beam course, giving a negative back focus of the entrance pupil. | 03-22-2012 |
20120147347 | IMAGING OPTICAL SYSTEM AND ILLUMINATION OPTICAL SYSTEM - An imaging optical system has a plurality of mirrors, which image an object field in an object plane into an image field in an image plane. A reflection face of at least one of the mirrors is configured as a free form face which cannot be described by a rotationally symmetrical function. The object field has an aspect ratio greater than 1. A ratio of a minimal and a maximal transverse dimension of the object field can be less than 0.9. | 06-14-2012 |
20120188525 | CATOPTRIC OBJECTIVES AND SYSTEMS USING CATOPTRIC OBJECTIVES - In general, in a first aspect, the invention features a system that includes a microlithography projection optical system. The microlithography projection optical system includes a plurality of elements arranged so that during operation the plurality of elements image radiation at a wavelength λ from an object plane to an image plane. At least one of the elements is a reflective element that has a rotationally-asymmetric surface positioned in a path of the radiation. The rotationally-asymmetric surface deviates from a rotationally-symmetric reference surface by a distance of about λ or more at one or more locations of the rotationally-asymmetric surface. | 07-26-2012 |
20120229605 | OPTICAL OBSERVATION INSTRUMENT WITH AT LEAST TWO OPTICAL TRANSMISSION CHANNELS THAT RESPECTIVELY HAVE ONE PARTIAL RAY PATH - An optical observation instrument has two optical transmission channels for transmitting two partial ray bundles ( | 09-13-2012 |
20130010087 | METHOD AND DEVICE FOR THE TIME-SEQUENTIAL RECORDING OF THREE-DIMENSIONAL IMAGES - A method and device are provided for time-sequential recording of three-dimensional images each of which has at least one first and one second partial image. The device has a sensor ( | 01-10-2013 |
20130070339 | METHOD AND DEVICE FOR IMAGE STABILIZATION IN AN OPTICAL OBSERVATION OR MEASUREMENT INSTRUMENT - A method is provided for image stabilization in an optical instrument ( | 03-21-2013 |
20130083396 | OPTICAL IMAGE OFFSET DEVICE, OPTICAL IMAGE STABILIZATION DEVICE AND OPTICAL OBSERVATION APPARATUS - An optical image offset device for compensating for or producing a lateral offset of an image of an observation object ( | 04-04-2013 |
20130242274 | PROJECTION SYSTEM - A projection system having a first tilting mirror matrix, a second tilting mirror matrix, and an imaging lens, which projects the first tilting mirror matrix onto the second tilting mirror matrix, wherein each tilting mirror matrix has multiple tilting mirrors, the tilting axes of which are positioned in a modulator surface plane. The imaging lens includes a first lens and an imaging mirror, and the imaging mirror forms an aperture stop of the imaging lens, wherein the aperture diaphragm includes an angle of other than 90° with the normal of the modulator surface of the first tilting mirror matrix without taking into account any optical path folds. | 09-19-2013 |
20140049633 | IMAGING SYSTEM AND IMAGING METHOD - An imaging system with an imaging lens system for imaging an object into an image plane is disclosed. The imaging lens system contains an optical component for a higher depth of field, of which the refractive power is alterable and the optical effect remains rotation-symmetrical. | 02-20-2014 |
20140085615 | PROJECTION DEVICE - A projection device includes a first and a second tilting mirror matrix, each including a plurality of tilting mirrors. A cover glass covers the tilting mirrors. An imaging lens system includes a relay lens system which images the tilting mirrors of the first tilting mirror matrix onto the tilting mirrors of the second tilting mirror matrix. Thus light reflected by the tilting mirrors of the first tilting mirror matrix onto tilting mirrors of the second tilting mirror matrix, and a projection lens system, which projects light reflected by tilting mirrors of the second tilting mirror matrix, in order to produce an image, is provided. The imaging lens system further includes a correction element which corrects at least one image error caused by the light obliquely passing through the cover glasses. | 03-27-2014 |
20150301436 | PROJECTION DEVICE - A projection device includes a first and a second tilting mirror matrix, each including a plurality of tilting mirrors. A cover glass covers the tilting mirrors. An imaging lens system includes a relay lens system which images the tilting mirrors of the first tilting mirror matrix onto the tilting mirrors of the second tilting mirror matrix. Thus light reflected by the tilting mirrors of the first tilting mirror matrix onto tilting mirrors of the second tilting mirror matrix, and a projection lens system, which projects light reflected by tilting mirrors of the second tilting mirror matrix, in order to produce an image, is provided. The imaging lens system further includes a correction element which corrects at least one image error caused by the light obliquely passing through the cover glasses. | 10-22-2015 |
Petrus J. Pretorius, Surrey CA
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20090065069 | MODULAR SERVICE SADDLE - A modular outlet is used with a service saddle strap so that different outlets that can be connected to different size lines can be used with the same saddle strap. | 03-12-2009 |
P. Hendrik Pretorius, Worcester, MA US
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20150134261 | SYNCHRONIZATION OF PATIENT MOTION DETECTION EQUIPMENT WITH MEDICAL IMAGING SYSTEMS - An improved system and method to acquire physiological information about a state of a subject, such as SPECT and PET information. The system generates a predetermine sequence of pulse signals and combines that sequence with a first physiological signal to generate a time-base signal. The time-base signal is than combined with a second physiological signal. The combined signals are analyzed to determine accurate temporal synchronization of the first and second physiological signals. The system can be generalized to handle more than two physiological signals. Examples of physiological signals can be for example EKG signals, tomography signals, gross-body motion signals, respiratory motion signals, voluntary motion signals, involuntary motion signals and other signals. The analyzed data can be displayed and/or recorded, and provides physiological information about a state of the subject. | 05-14-2015 |
Terry Pretorius, New York, NY US
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20100150996 | ATHLETIC PATCH - The present invention relates to patches for the administration of an athletic supplement to subjects engaged in rigorous exercise or heavy outdoor work. The invention also relates to methods of administering nutrients to subjects using the patch of the invention. | 06-17-2010 |