| Leco Corporation Patent applications |
| Patent application number | Title | Published |
|---|
| 20120039749 | PRESSURIZED GAS PURGE SEAL FOR COMBUSTION FURNACE - An analytical combustion furnace has an input port for receiving a holder for an analytical sample. A purge block is coupled to the input port of the combustion furnace and has an input end for receiving the holder and a gas inlet and a gas outlet. A door selectively closes the input end of the purge block, and a pressurized seal is coupled between the purge block and the door. A source of purging gas is coupled to the gas inlet of the purge block for pressurizing the seal. The gas outlet of the purge block communicates with the seal to allow purging gas to escape the area of the seal. In one embodiment, a pressurized seal surrounds a push rod, which seal is pressurized by a purging gas to continuously purge the entry of the push rod into the purge block, thereby eliminating atmospheric contamination. | 02-16-2012 |
| 20120036673 | COMBUSTION FURNACE AUTO CLEANER - An automatic cleaning assembly for an analytical furnace is detachable from the filter chamber above the combustion tube. The cleaning assembly includes a rotating brush which is lowered through the filter chamber and into the combustion tube while a vacuum is drawn through the lower seal of the combustion tube. This results in a higher vacuum pressure differential and improved flow rate for removing dust from the filter of the furnace and the combustion tube. | 02-16-2012 |
| 20110192969 | METHOD AND APPARATUS FOR ION MANIPULATION USING MESH IN A RADIO FREQUENCY FIELD - Ion manipulation systems include ion repulsion by an RF field penetrating through a mesh. Another comprises trapping ions in a symmetric RF field around a mesh. The system uses macroscopic parts, or readily available fine meshes, or miniaturized devices made by MEMS, or flexible PCB methods. One application is ion transfer from gaseous ion sources with focusing at intermediate and elevated gas pressures. Another application is the formation of pulsed ion packets for TOF MS within trap array. Such trapping is preferably accompanied by pulsed switching of RF field and by gas pulses, preferably formed by pulsed vapor desorption. Ion guidance, ion flow manipulation, trapping, preparation of pulsed ion packets, confining ions during fragmentation or exposure to ion to particle reactions and for mass separation are disclosed. Ion chromatography employs an ion passage within a gas flow and through a set of multiple traps with a mass dependent well depth. | 08-11-2011 |
| 20110150609 | CRUCIBLE SHUTTLE ASSEMBLY AND METHOD OF OPERATION - A crucible handling shuttle includes a pair of opposed dual crucible-gripping arms mounted on a rotatable head. The shuttle is removably plugged into a sliding block of a carriage to move between a furnace and a crucible loading station. The carriage includes mechanical, electrical, and pneumatic plugs or sockets which couple to mating sockets or plugs of the shuttle. A linear actuator extends between the carriage and the furnace base to raise and lower the carriage and shuttle coupled thereto. | 06-23-2011 |
| 20110075696 | EASILY REMOVABLE COMBUSTION TUBE - A combustion tube mounting system releasably mounts a combustion tube to an aperture in the floor of a furnace housing. The combustion tube has a base assembly with a cam and can be manually or automatically unlocked by cam pins in the floor for selectively engaging the cam for lowering the combustion tube from the floor of the furnace. When a new combustion tube is placed on the lower seal assembly and raised, it automatically aligns and engages the upper furnace seal and engages cams on the floor of the furnace housing which lock the combustion tube in place as it is introduced into the furnace. | 03-31-2011 |
| 20110071788 | METHOD AND APPARATUS FOR THE CALCULATION OF COAL ASH FUSION VALUES - The IT and FT values for coal and coke samples can be accurately predicted by applying equations to determined ST and HT temperatures. For reducing atmospheres, the equations are IT=C | 03-24-2011 |
| 20090090861 | DATA ACQUISITION SYSTEM FOR A SPECTROMETER - A data acquisition system and method are described that may be used with various spectrometers. The data acquisition system may include an ion detector, an initial/transient processing module, and a spectra processing module. The initial/transient processing module is provided for processing the ion detection signals and for supplying processed signals to the spectra processing module. The transient processing module may contiguously sample the ion detection signals at a rate of at least 1.5 GHz. The spectra processing module may generate spectra from the transients at a rate of at least 50 spectra per second. The initial processing module may be configured to have a sensitivity that is sufficient to detect a single ion received within one of over at least 100 transients and to detect and quantify a number of ions simultaneously striking said ion detector up to at least 10 simultaneously striking ions. | 04-09-2009 |
| 20090014642 | DATA ACQUISITION SYSTEM FOR A SPECTROMETER USING HORIZONTAL ACCUMULATION - A data acquisition system and method are described that may be used with various spectrometers. The data acquisition system may include an ion detector, an initial processing module, and a spectra processing module. The initial processing module is provided for receiving, sampling, and processing ion detection signals received from the ion detector, and for supplying processed signals to the spectra processing module. The initial processing module includes a horizontal accumulation circuit that combines a fractional number of adjacent samples of the ion detection signals into bins. The number of adjacent samples to combine into bins may vary as a function of: (1) the time of arrival at the ion detector corresponding to that sample; (2) the mass corresponding to that sample; (3) the resolution corresponding to that sample; and/or (4) an operational mode of the spectrometer. The spectra processing module receives the processed signals and generates spectra. | 01-15-2009 |
