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| Number | Title | Issue Date |
| 5157456 | Double monochromator A double monochromator comprises an inlet slit 20, which is imaged in the plane of an intermediate slit 34 through a first grating monochromator 36. The intermediate slit 34 is imaged in the plane of the outlet slit 34 through a second grating monochromat... | 10/20/1992 |
| 5148234 | Method and device for analyzing samples by means of atomic absorption spectroscopy Method for analysis of samples by means of atomic absorption spectroscopy with electrothermal atomization of sample consists of the method steps: (a) introducing a liquid sample into a furnace, (b) heating the furnace up to a drying temperature for drying... | 09/15/1992 |
| 5094530 | Atomic absorption spectrometer An atomic absorption spectrometer with electrothermal atomization of the sample and background compensation by use of Zeeman effect comprises a furnace (130) for the electrothermal atomization of the sample which furnace is heated transverse to the direct... | 03/10/1992 |
| 5071624 | System for introducing a sample substance into a spectroscopical analytical instrument A system for introducing a sample substance into a spectroscopical analytical instrument which includes a first pump which, when on, pumps a sample liquid and a buffer liquid, and a second pump which, when on, pumps an eluting liquid and rinsing liquid. T... | 12/10/1991 |
| 5066123 | Device for electrothermal atomizing of samples for spectroscopic purposes A device for electrothermal atomization of samples for spectroscopic purposes with a furnace body made of graphite, designed such that electrical current can be passed through, and a pot-shaped sample receptacle which is separated from the furnace body an... | 11/19/1991 |
| 5066124 | Atomic absorption spectrophotometer for simultaneous multi-element analysis In an atomic absorption spectrophotometer for multielement analysis, the light from a plurality of light sources each of which emits the resonance lines of one associated looked-for element is superimposed into a single light beam by means of interconnect... | 11/19/1991 |
| 5059812 | Control apparatus for controlling an aspirator tube in an automatic sample dispenser The control apparatus controls the lowering motion of an aspirator tube into a sample vessel in an automatic sample dispenser in a manner such that the smallest possible portion of an external surface of the aspirator tube is wetted by a liquid present in... | 10/22/1991 |
| 5054914 | Apparatus for analysis of volatile samples by atomic spectroscopy The volatile sample is entrained by a carrier gas flow leading to a measuring arrangement of an atomic spectrometer through a carrier gas conduit. A tube section containing a gas permeable, inert filling is placed in the carrier gas conduit. A cooling jac... | 10/08/1991 |
| 5053621 | Electro-optical ion detector for a scanning mass spectrometer and method of making same An improved electro-optical ion detector comprising a channel electron multiplier assembly located at the angled focal plane of the magnetic sector of a scanning mass spectrometer with a twisted fiberoptic window with a means for precisely optically coupl... | 10/01/1991 |
| 5046850 | Driving mechanism for driving an oscillating polarizer In a driving mechanism for driving an oscillating polarizer in a polarimeter, the polarizer is driven by a stepper motor which is controlled by a computer to make a reciprocating movement. A reference position sensor is connected to the oscillating polari... | 09/10/1991 |
| 5045476 | Method and device for analyzing solid substances on mercury For analyzing solid substances on mercury by measuring the atomic absorption, the substance is heated in order to expel the mercury. The generated mercury vapor is conveyed with a carrier gas flow over a body having a large surface made of an amalgam-gene... | 09/03/1991 |
| 5045196 | Apparatus for pre-concentration of a sample for spectroscopical reasons An apparatus for the pre-concentration of a sample substance for spectroscopical reasons in the flow injection analysis having an ion-exchanger column of conical shape filled with a granular ion-exchanger. For pre-concentration of the sample, the sample l... | 09/03/1991 |
| 5032283 | Low dispersion fluid conduit useful in chromatography systems A fluid conduit including a tube having a two-dimensional serpentine opening therethrough and exhibiting low peak dispersion is applicable as an extra-column connection.... | 07/16/1991 |
| 5028800 | Two-beam photometer using specific beam chopper arrangement In a double-beam photometer comprising a light source providing a light beam, detector means, a sample area, optical means for guiding the light beam as a measuring light beam through the sample area onto the detector means, means for guiding the same lig... | 07/02/1991 |
| 5026652 | Method and device for mercury analysis An apparatus and method for analyzing mercury by the atomic absorption spectrometry technique consisting of a quartz collecting tube containing a metallic net for collecting an amalgam of mercury sample, a heater for heating the collecting tube sufficient... | 06/25/1991 |
| 5020901 | Multimode laser diode system for range measurement A laser system includes a multimode laser diode positioned at a range from a target. Backscatter from the target returns into the diode and to modify the emission. An induced modulation frequency in the emission effects oscillatory mode transitions to cre... | 06/04/1991 |
| 5015093 | Electromagnet for an atomic absorption spectrometer A solenoid serves for generating a magnetic field at the location of a sample which is to be atomized in an atomic absorption spectrometer. A shift of the absorption lines of the atoms in a sample relatively to the emission lines in a measuring light beam... | 05/14/1991 |
| 5005977 | Polarimeter A polarimeter for measuring the rotation of optically active samples comprises a light source which generates a measuring light beam, a polarizer mounted for rotation about the beam axis of the measuring light beam, a driving mechanism for reciprocating r... | 04/09/1991 |
| 5005976 | Electrothermal atomization of a sample for spectroscopic purposes A device for electrothermal atomization of a sample for spectroscopic purposes comprises a furnace (10) which is held between two contacts (54, 56). The contacts (54, 56) surround the furnace (10 ) and form a cavity (58) with an insulating gap (88) being ... | 04/09/1991 |
| 5002518 | Belt tensioning apparatus A belt tensioning apparatus using a spring to provide the proper tension in a belt. A belt/pulley assembly is disclosed with one pulley slidably mounted on a bracket. A spring compressed to a fixed distance to provide a known force is attached to the brac... | 03/26/1991 |
| 5002390 | Atomic emission spectrometer for simultaneous multi-element measurement of elements in a sample An atomic emission spectrometer for multi-element measurement of elements in a sample comprises an apparatus to atomize the sample and to excite the atoms for emitting characteristic spectral lines, a dispersion device which generates a spectrum of the li... | 03/26/1991 |
| 4995163 | Method of assembling a chromatography column Disclosed is a method of assembling a chromatography column including the steps of providing a cylindrical core element, winding an innermost layer of uniformly spaced fibers helically about the core element, winding a plurality of concentric annular laye... | 02/26/1991 |
| 4994676 | Electro-optical ion detector for a scanning mass spectrometer A scanning mass spectrometer (10) in combination with an electro-optical detector (100) which enable greatly increased speed of mass determinations by detecting a limited range of masses simultaneously, thus reducing the number of discrete magnetic field ... | 02/19/1991 |
| 4991960 | Atomic absorption spectrometer In an atomic absorption spectrometer, a burner 16 for atomizing a sample is movable between a first and a second position. In the first position, the "cloud of atoms" is formed in the area of the housing-fixed measuring light beam 14. In the second positi... | 02/12/1991 |
| 4991610 | Rinsing liquid apparatus for analytical instruments The present application is directed to new and improved apparatus for use in analytical instruments which includes an elongated dosing tube having a tip at one end which is constructed and arranged to move between a sample vessel, a rinsing vessel and an ... | 02/12/1991 |
| 4989976 | Device for supplying liquid to a nebulizer in a spectrometer In a device for supplying liquid to an atomization device operating with a nebulizer (22) in a spectrometer, the liquid is fed to the nebulizer (22) by a peristaltic pump (10) through a supply conduit (12). A valve (18) responding to liquid pressure is ar... | 02/05/1991 |
| 4989975 | Atomic absorption spectrometer In an atomic absorption spectrometer with an atomizing device (190) and a line emitting light source (16), an optical system (22,28 . . . ) for generating a measuring light beam (18), and a photo-electrical detector (38), which are arranged in a housing (... | 02/05/1991 |
| 4981356 | Method and apparatus for electrothermal atomization of samples Sample liquid is vaporized by a thermospray vaporizer with a heated capillary tube. The end of the capillary tube is inserted into a graphite tube furnace while the furnace and a vertical sample platform in the furnace is at an above-ambient deposition te... | 01/01/1991 |
| 4975582 | Pressure-modulated infrared gas analyzer and method A gas analyzer (10) for detecting low concentrations of a specific gas which has a sample chamber comprising passages (14, 30, and 32) through which radiant energy is directed and which is pressure modulated by a loud speaker (36) both of which provide a ... | 12/04/1990 |
| 4966787 | Method of creating isolated plates on the inside surface of a metallized substrate A method for forming an electrostatic field deflector tube (50) for use in an electron beam machine (10) which comprises the use of a rigid boring bar (88) with a diamond scribe tip (90) and a rigid holder (92) for the metal coated tube. The scribe tip (9... | 10/30/1990 |
| 4962045 | Time-resolved fluorimetric detection of lanthanide labeled nucleotides Nucleotides conjugated with a chelating agent and labeled with a lanthanide, especially terbium, are readily detected by time-resolved fluorimetry during and following gel electrophoresis. The labeled nucleotide conjugates are very stable, highly fluoresc... | 10/09/1990 |
| 4956024 | Non-contacting method of cleaning surfaces with a planoar gas bearing A non-contact method of cleaning a surface comprising forming a thin gas film (10) of high velocity gas between a surface (14) to be cleaned and a cleaning device (16). The gas film (10), being also a gas bearing, supports the cleaning device (16) and thu... | 09/11/1990 |
| 4953960 | Optical reduction system An unobscured catadioptric optical reduction system wherein all refractive elements are made of the same material. From its long conjugate end to its short conjugate end the system comprises a first lens group, a beamsplitter, a second lens group, a mirro... | 09/04/1990 |
| 4952372 | Flow injection apparatus for carrying out chemical analyses In a flow injection analysis apparatus, the flow of reagent to a measuring apparatus is generated by means of a peristaltic pump. A sample liquid which is contained in a loop of tubing is introduced into the flow of reagent by a change-over valve with the... | 08/28/1990 |
| 4952858 | Microlithographic apparatus This invention is directed to electro-magnetic alignment apparatus which includes a monolithic stage, a sub-stage, an isolated reference structure, force actuators interposed between the monolithic stage and the sub-stage for suspending and positioning th... | 08/28/1990 |
| 4949056 | Unconventional adaptive optics An improved adaptive optics system is disclosed for correcting atmospheric phase aberrations. A satellite (10) laser beacon is operated at the Stokes shifted Raman wavelength. After passing through the atmosphere (A), the signal is phase conjugated (16) a... | 08/14/1990 |
| 4933714 | Apparatus and method for reproducing a pattern in an annular area A master disk is positioned such that a radial portion thereof is within a restricted field having good imagery of an optical projection system. A second blank disk is positioned such that the image location extends along a radial portion thereof. As the ... | 06/12/1990 |
| 4929139 | Passive electrostatic vacuum particle collector Disclosed are passive electrostatic particle collectors (10 & 12) for use in vacuum chambers (24 & 32) especially for a particle beam machine system (30 & 36) to collect particulates, such as dust and debris, generated by moving parts (16) within such cha... | 05/29/1990 |
| 4927532 | Device for the compensation of the baseline drift of a chromatographic separating column The baseline drift occurring during a temperature or flow rate program in a chromatographic separating column is compensated for by signals from a function generator. The function generator supplies a computed baseline signal which is a representation of ... | 05/22/1990 |
| 4917493 | Furnace for electrothermal atomization of samples for analysis by atomic absorption spectrophotometry An electrically heated tubular body fabricated of pyrolytic graphite in coaxial layers serves to atomize samples for analysis by atomic absorption apectrophotometry. Radially extending graphite rods engage the medial portion of the tubular body at diametr... | 04/17/1990 |
