| Patent Number |
Title Of Patent |
Date Issued |
| D273280 |
Electronic balance |
April 3, 1984 |
|
| 7404707 |
Sample mounting press |
July 29, 2008 |
| A hydraulic sample mounting press utilizes a face seal against the top face of a molding cylinder. The face seal employs a hydraulic cylinder to press a disk-shaped surface of a cap piece against the top annular face of the mold cylinder for a metallographic mounting press. The face seal |
| 7404670 |
Analytical furnace with predictive temperature control |
July 29, 2008 |
| An analytical furnace includes a predictive temperature control which is trained to model crucible temperature during analysis by employing a pair of temperature sensors, with one sensor being mounted in the furnace in fixed relationship and a second sensor which can be positioned within |
| 7402280 |
Automatic crucible and sample loading system and method |
July 22, 2008 |
| A crucible and sample handling system and method provides a crucible-holding cartridge which is prepackaged to hold a plurality of crucibles. Upon removal of an end cap exposing an exit aperture, it is loaded onto a crucible delivery assembly which discharges individual crucibles fro |
| 7385187 |
Multi-reflecting time-of-flight mass spectrometer and method of use |
June 10, 2008 |
| A multiple reflecting time-of-flight mass spectrometer (MR-TOF MS) and method of analysis are disclosed. The flight path of ions is folded along a trajectory by electrostatic mirrors. The longer flight path provides higher resolution while maintaining a moderate instrument size. |
| 7375569 |
Last stage synchronizer system |
May 20, 2008 |
| A pulse jitter reduction circuit employs a low jitter system clock coupled to synchronize a pulse generating device and an ultra low jitter flip-flop to generate substantially jitter-free trigger signals employed to generate high voltage pulses for a flight tube of a time-of-flight m |
| 7326925 |
Multi-reflecting time-of-flight mass spectrometer with isochronous curved ion interface |
February 5, 2008 |
| The present invention relates generally to a multi-reflecting time-of-flight mass spectrometer (MR TOF MS). To improve mass resolving power of a planar MR TOF MS, a spatially isochronous and curved interface may be used for ion transfer in and out of the MR TOF analyzer. One embodime |
| 7196324 |
Tandem time of flight mass spectrometer and method of use |
March 27, 2007 |
| To provide comprehensive MS--MS analysis, a time-nested separation is employed using two time-of-flight (TOF) mass spectrometers. Parent ions are separated in a slow and long TOF1, operating at low ion energy (1 to 100eV), and fragment ions are mass analyzed in a fast and short TOF2, |
| 7139422 |
Indentation hardness test system |
November 21, 2006 |
| An indentation hardness test system includes a frame including an attached indenter, a movable stage for receiving a part attached to the frame, a camera, a display, a processor and a memory subsystem. The camera captures images of the part, which can then be provided on the display. |
| 7070738 |
Analyzer with variable volume ballast chamber and method of analysis |
July 4, 2006 |
| An analyzer having a combustion furnace includes a gas flow stream including a combustion detector in the stream of byproducts of combustion and a variable volume ballast chamber for receiving byproducts of combustion and which has a movable piston which moves in response to the intr |
| 6996264 |
Indentation hardness test system |
February 7, 2006 |
| An indentation hardness test system includes a frame having a movable turret, a movable stage for receiving a part, a camera, a display, a processor and a memory subsystem. The turret includes an objective lens of a microscope and an indenter and the movable stage is configured for r |
| 6827903 |
Inert gas fusion analyzer |
December 7, 2004 |
| A single pass analyzer includes multiple infrared sensors, a catalytic converter, a scrubber and a thermal conductivity cell all coupled in series to provide a single pass (i.e., one sample) analyzer which allows for fast analysis, allows for the speciation of hydrogen samples, requires |
| 6623699 |
Analyzing system for high accuracy nitrogen determination |
September 23, 2003 |
| An analyzer compensates for gas flow perturbations by providing a makeup flow of carrier gas to maintain the pressure and/or flow rate of analyte and inert gas through a detector constant such that a accurate determination of a low concentration of an analyte in the presence of a hig |
| 6357279 |
Control circuit for thermal conductivity cell |
March 19, 2002 |
| A control circuit for a thermal conductivity cell employs a constant resistance bridge drive circuit which automatically adjusts to maintain a measurement filament at a constant resistance. A reference filament provides a differential signal representative of the concentration of an |
| 6326620 |
Switched mode NDIR system |
December 4, 2001 |
| A low noise amplifier circuit modulates input signals at a frequency of about 1 kHz, subsequently demodulates and filters the signals to provide an analog DC output level in which the 1/f noise of the amplifier is effectively eliminated due to the selection of the modulation frequency |
| 6316768 |
Printed circuit boards as insulated components for a time of flight mass spectrometer |
November 13, 2001 |
| The present invention is embodied in a method and apparatus for utilizing inherently insulative material, such as the glass and epoxy resins used in construction of printed circuit boards, for construction of components in a time of flight mass spectrometer. By using printed circuit boar |
| 6291802 |
Sample introduction assembly |
September 18, 2001 |
| A sample introduction system includes a drop chamber which can be sealed and outgassed and which includes a movable jaw selectively holding the sample in position above a conduit communicating with an open crucible for receiving a sample once the jaw has been moved to an open position |
| 6270727 |
Analytical crucible |
August 7, 2001 |
| An analytical crucible is made of a ceramic material with openings to allow the escape of gaseous byproducts of combustion through the crucible while holding the sample. In a preferred embodiment, the crucible is made of a porous ceramic material having a mean pore diameter of from about |
| 6180069 |
Cleaning system and method for cleaning a flow restrictor in a supercritical fluid extraction sy |
January 30, 2001 |
| A source of oxidizing gas is coupled to a flow restrictor during a cleaning cycle in which the flow restrictor is heated to a temperature for a period of time sufficient to oxidize and remove built up residue from prior analysis. In one embodiment compressed air is supplied at a pressure |
| 6163032 |
Tapered or tilted electrodes to allow the superposition of independently controllable DC field g |
December 19, 2000 |
| The present invention is embodied in a method and apparatus for transporting ions via a path generated by RF electrodes having a controllable DC field gradient generated thereon which does not suffer from mass discrimination. In a preferred embodiment, the number of electrodes are do |
| 6023330 |
Centered sphere spectrometer |
February 8, 2000 |
| A detection system for an atomic emission spectrometer includes a spherical convex diffraction grating having a radius of curvature which is one-half the radius of curvature of a pair of concave spherical mirrors. The diffraction grating and mirrors are positioned within a chamber such t |
| 5981946 |
Time-of-flight mass spectrometer data acquisition system |
November 9, 1999 |
| A system intended for use in time-of-flight mass spectroscopy for detecting at least one ion species in an ion spectra including a signal acquisition circuit for detecting the ions in the spectra and generating output signals indicative thereof, a sequence and storage control circuit for |
| 5879634 |
High pressure containment assembly |
March 9, 1999 |
| An assembly for extracting analytes from a sample using a fluid under pressure, and embodying the invention, includes an extraction cell receiving the sample and having a chamber body closed at one end by a translatable slide block assembly in fluid communication with the fluid under |
| 5712480 |
Time-of-flight data acquisition system |
January 27, 1998 |
| A system intended for use in time-of-flight mass spectroscopy for detecting at least one ion species in an ion spectra including a signal acquisition circuit for detecting the ions in the spectra and generating output signals indicative thereof, a sequence and storage control circuit for |
| 5646726 |
Atmospheric seal for glow discharge analytical instrument |
July 8, 1997 |
| This invention provides a gas atmosphere surrounding a seal between the face of a glow discharge lamp assembly and the sample surface to eliminate the possibility of the introduction of atmospheric gases into the glow discharge lamp. A groove concentric with the O-ring seal in the face o |
| 5547876 |
Combustion accelerators, processes for their production and processes for their use in elemental |
August 20, 1996 |
| Non-toxic combustion decomposition accelerators and processes for their production for elemental analysis. The non-toxic accelerators may be either single component or multicomponent. The single component non-toxic accelerators are glass frit, niobium pentoxide, and inorganic phosphate |
| 5408315 |
Glow discharge analytical instrument for performing excitation and analyzation on the same side |
April 18, 1995 |
| A non-conductive isolator for supporting a sample to be analyzed by radio frequency energy induced glow discharge techniques has a conductive ring for coupling a source of radio frequency energy to the same surface of a sample which is in direct contact with the induced glow discharge. A |
| 5395586 |
Sample autoloader for use with an analytical combustion furnace |
March 7, 1995 |
| A sample autoloader loads a sample into a furnace and removes a sample from the furnace. The sample autoloader includes a sealing plate for sealing the furnace. The sample autoloader also includes a mechanism for pushing a sample into the furnace and removing a sample from the furnace. T |
| 5322360 |
Isothermal calorimeter |
June 21, 1994 |
| A calorimeter for determining the calorific value of a sample on the basis of the difference in temperature, measured on a real time basis, between the temperature of the water in a bucket containing the sample in a conventional calorimeter bomb and the temperature of the water in a |
| 5315091 |
Resistively heated sample preparation apparatus |
May 24, 1994 |
| An electrical resistance heated oven is used to heat a crucible to melt a sample and to simultaneously heat a casting dish into which the molten sample can be poured. The oven is cooled with the crucible and casting dish within the oven in order to prepare a sample bead for analysis. In |
| 5314662 |
Sample autoloader for use with an analytical combustion furnace |
May 24, 1994 |
| A sample autoloader loads a sample into a furnace and removes a sample from the furnace. The sample autoloader includes a sealing plate for sealing the furnace. The sample autoloader also includes a mechanism for pushing a sample into the furnace and removing a sample from the furnace. T |
| 5313047 |
Analytical sample preparation system |
May 17, 1994 |
| An interchangeable module for supporting a receptacle into which a molten sample, prepared by a fluxer, can be poured for analysis. One module can support a resistively heated casting dish into which a molten sample can be poured and cooled to form a solid sample for instrumental analysi |
| 5277493 |
Analytical sample preparation system |
January 11, 1994 |
| An apparatus for melting samples in crucibles above burners while moving the crucibles to mix the contents. The crucibles are supported by movable shafts on a movable subframe. The shafts can oscillate in a horizontal plane to mix the contents of the crucible. The subframe can also oscil |
| 5269827 |
Analytical sample preparation system |
December 14, 1993 |
| An instrument and system for the preparation of a sample for analysis provides a crucible holder which improves the holding and control of a melting crucible during operation of the device for agitating a powdered sample and flux while being heated. The crucible holder is coupled to an |
| 5246667 |
Analytical furnace |
September 21, 1993 |
| An analytical furnace includes a pair of generally vertically extending coaxially mounted spaced furnace tubes mounted to a support. The inner tube is made of a material which does not react with the specimen during pyrolysis to produce intereferring byproducts. An analytical sample |
| 5236353 |
Vertical combustion furnace |
August 17, 1993 |
| A vertical resistive combustion furnace having a vertically oriented combustion zone in which first and second coaxially aligned tubes depend. The first tube is open at one end and closed at the other. The second tube is open at one end and partially closed at the other end and is mounte |
| 5233308 |
Thermal conductivity cell |
August 3, 1993 |
| A thermal conductivity cell in the form of a bridge is used as one of the resistors in a Wheatstone bridge network. The output of the thermal conductivity cell is applied to the input of a low noise amplifier, the output of which is differentiated by an R-C coupling network having a time |
| 5211857 |
Gate safety arrangement |
May 18, 1993 |
| A method and apparatus for loading a gate into a valve mechanism with a gate safety arrangement for physically preventing the gate from being loaded in the valve mechanism unless the gate has a prescribed orientation with respect to the loading path into the valve mechanism. |
| 5155547 |
Power control circuit for inductively coupled plasma atomic emission spectroscopy |
October 13, 1992 |
| A multiple frequency plasma torch activation circuit includes a system driver circuit with a pair of different frequency sources and a selector switch which allows one of the sources to be coupled to a splitter assembly which applies signals to a pair of independent power amplifiers |
| 5064617 |
Combustion system |
November 12, 1991 |
| A combustion chamber includes an inner cylindrical member concentrically mounted within an outer cylindrical member with a cylindrical space therebetween. The outer cylindrical member is enclosed at one end and both cylindrical members are open at an opposite end for access to the co |
| 5011050 |
Stepped gate safety arrangement |
April 30, 1991 |
| Apparatus for loading a gate into a valve mechanism with a gate safety arrangement for physically preventing the gate from being loaded into the valve mechanism unless the gate has a prescribed orientation with respect to the loading path into the valve mechanism. |
| 4689132 |
Etching charge measurement system |
August 25, 1987 |
| An analyzer for acid-soluble aluminum in a steel sample precisely controls the etching charge by monitoring the etching current level and integrating the current with time. Once a predetermined charge is reached, the etching current is terminated. In a preferred embodiment, the etching c |
| 4646578 |
Molten metal sampling device |
March 3, 1987 |
| A sampling device for obtaining samples from a molten metal bath includes a pair of concentric vitreous tubes spaced from one another and coupled to each other such that the inner tube can be readily removed once the sample is taken. The outer tube is cylindrical and includes a restricti |
| 4643032 |
Frangible molten metal sampling device |
February 17, 1987 |
| A sampling device for obtaining samples from a molten metal bath includes a pair of concentric tubes spaced from one another and coupled at at least one end by a frangible interconnection such that the inner tube can be readily removed once the sample is taken and the frangible connectio |
| 4624149 |
Sampling tube |
November 25, 1986 |
| A sampling tube includes a sealed metallic tube having a fusible end cap at an extending end which, when submerged in a molten bath, admits the molten sample into the evacuated tube. The tube has a liner which is either frangible or has a nonadhering surface defining a substantially unif |
| 4622009 |
Carbon, hydrogen, and nitrogen analyzer |
November 11, 1986 |
| The specification discloses an analyzer for determining the carbon, hydrogen, and nitrogen content of an organic material. The analyzer includes a vertically oriented, U-shaped furnace including a combustion chamber containing a crucible in which the sample is combusted into constitu |
| 4616938 |
Apparatus for measuring thermal and other quantities of substances |
October 14, 1986 |
| Apparatus for measuring the calorific value and other quantities of combustible substances. The apparatus includes a support structure to which a pressure vessel is mounted. The pressure vessel has a cap which provides access to a combustion chamber within the pressure vessel. The pr |
| 4579313 |
Sample mounting system |
April 1, 1986 |
| A sample mounting system includes a coupon holder having a plurality of apertures defining in part mold cavities for supporting a plurality of printed circuit board coupons on the holder. A removable mold is also provided and engages the coupon holder to define mold cavities into which |
| 4573910 |
Carbon, hydrogen, and nitrogen analyzer |
March 4, 1986 |
| The specification discloses an analyzer for determining the carbon, hydrogen, and nitrogen content of an organic material. The analyzer includes a vertically oriented, U-shaped furnace including a combustion chamber containing a crucible in which the sample is combusted into constitu |
| 4530660 |
Analytical furnace window assembly |
July 23, 1985 |
| The specification discloses a window assembly for an analytical furnace enabling the window to be readily and easily removed and reinstalled to facilitate servicing of the window. The assembly includes a one-piece fused silica housing having concentric inner and outer tube portions. The |
