Patents Represented by Attorney J. D. Crane
  • Patent number: 4563090
    Abstract: In a grating spectrometer a signal spectrum is measured repeatedly while inserting different filters. The number of the filters and measurements correspond to the number of the occurring grating orders not suppressed. The signal spectra and the transmission characteristics of the filters are stored. A system of equations is achieved, from which a computer calculates the signal partial spectra associated with the individual grating orders. A total spectrum is composed from these signal partial spectra. Separation of the higher grating orders need not be effected optically, for example by cut-off filters.
    Type: Grant
    Filed: June 10, 1983
    Date of Patent: January 7, 1986
    Assignee: Bodenseewerk Perkin-Elmer & Co., GmbH
    Inventor: Wolfgang Witte
  • Patent number: 4558603
    Abstract: A needle is movable by a servomotor between a position of rest and an operating position in a stationary housing. The needle includes a tip and a first lateral opening close to the tip and a second lateral opening spaced therefrom. A longitudinal passage of the housing through which the needle is guided includes a pair of seals at the lower end and a seal at the upper end. A carrier gas conduit ends in the longitudinal passage axially inwards of the seals. A port communicating with atmosphere ends axially inwards of the upper seal. The arrangement permits a sample extraction from sample vessels closed by a membrane without the sample vessels having to be lifted and pressed against the needle.
    Type: Grant
    Filed: November 21, 1983
    Date of Patent: December 17, 1985
    Assignee: Bodenseewerk Perkin-Elmer & Co., GmbH
    Inventors: Wolfgang Chlosta, Wolfgang Riegger
  • Patent number: 4555936
    Abstract: A detector assembly includes means for determining the fluorescence characteristics, the ultraviolet absorbance characteristics and the electrical conductivity characteristics of a single sample of an eluate of a chromatographic separating column.
    Type: Grant
    Filed: December 13, 1984
    Date of Patent: December 3, 1985
    Assignee: The Perkin-Elmer Corporation
    Inventor: Raymond P. W. Scott
  • Patent number: 4554436
    Abstract: A sample vessel container in a sampling device for use in gas chromatography includes a rotatable metal block having a circular array of axial bores for accommodating a plurality of sample vessels. A heating jacket operative as an electric heater is non-rotatably connected to a housing, which jacket tightly surrounds in material contact with, and is adapted to heat, the rotatable metal block.
    Type: Grant
    Filed: March 15, 1984
    Date of Patent: November 19, 1985
    Assignee: Bodenseewerk Perkin-Elmer & Co., GmbH
    Inventors: Wolfgang Chlosta, Wolfgang Riegger
  • Patent number: 4553022
    Abstract: An effusion cell assembly includes a self-supporting element disposed within a housing member. The self-supporting element provides efficient heat transfer to a crucible positioned therein and permits operation at relatively lower filament tempertures.
    Type: Grant
    Filed: June 4, 1984
    Date of Patent: November 12, 1985
    Assignee: The Perkin-Elmer Corporation
    Inventor: Paul Colombo
  • Patent number: 4548713
    Abstract: A pulse damper for use in a liquid chromatographic solvent delivery system includes a cavity within a housing containing a compliant medium. The compliant medium being an elastomer. As a consequence, a solvent flow volume can be precisely formed and maintained.
    Type: Grant
    Filed: March 2, 1984
    Date of Patent: October 22, 1985
    Assignee: The Perkin-Elmer Corporation
    Inventor: Carl E. Schmid
  • Patent number: 4548497
    Abstract: In a method for introducing a sample into a graphite tube in flameless atomic absorption spectroscopy a lamella- or crucible-like sample carrier is introduced into the graphite tube from the end face in axial direction. Drying and ashing of the sample is effected outside the graphite tube. The sample carrier may be heated indirectly by radiation or directly by electric current being passed therethrough.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: October 22, 1985
    Assignee: Bodenseewerk Perkin-Elmer & Co., GmbH
    Inventors: Bernhard Huber, Rolf G. A. Tamm, Toma Tomoff, Winfried Gonner
  • Patent number: 4541452
    Abstract: The present invention is directed to a solvent pressurization system for use in liquid chromatography which includes a source of pressurized gas, a plurality of sealed vessels that are adapted to hold solvents therein, each of the vessels having a gas input port, said vessels being located within a closable compartment; a double manifold having a distribution chamber in communication with the pressurized gas from the gas source and an exhaust chamber communicatable with a venting system, a set of fittings for each vessel for controlling the gas flow from the distribution chamber to the vessel and from the vessel to the exhaust chamber, each set of fittings including inlet valve means and outlet valve means and an element for opening or closing both valve means together.
    Type: Grant
    Filed: October 10, 1984
    Date of Patent: September 17, 1985
    Assignee: The Perkin-Elmer Corporation
    Inventor: Roland C. Paradis
  • Patent number: 4540120
    Abstract: A system for assuring a more even powder flow rate in a flame spray gun. A powder metering device entrains powder into a gas. The gas with entrained powder is coupled to the flame spray gun. Vibration means, coupled to the powder and gas conduit, is provided to prevent any powder from settling in the conduit.
    Type: Grant
    Filed: July 14, 1983
    Date of Patent: September 10, 1985
    Assignee: METCO, Inc.
    Inventor: Richard A. Waszkiewicz
  • Patent number: 4537572
    Abstract: An apparatus for positioning a thermogravimetric furnace includes a furnace mounting bracket which is rotatable about and linearly translatable along a single axis. In addition, simultaneous rotational and linearly movement of the furnace is excluded.
    Type: Grant
    Filed: February 2, 1984
    Date of Patent: August 27, 1985
    Assignee: The Perkin-Elmer Corporation
    Inventors: Harold I. Hill, Stanley D. Norem, Roger Targowski
  • Patent number: 4534646
    Abstract: A lamella-shaped sample carrier is attached to a tubular carriage and is movable into a graphite tube of a graphite tube cuvette from the end fact below the measuring light beam of an atomic absorption spectrophotometer. The carriage with the sample carrier is movable between an inner position, a dosing position and an outer position. The sample carrier is electrically heated in any position by means of busses. Drying and ashing of the sample take place outside the graphite tube. The graphite tube is then heated to atomizing temperature, while the sample carrier is in its outer position. Subsequently, the sample carrier is advanced into the inner position and heated itself. Thus, rapid atomization of the sample is achieved.
    Type: Grant
    Filed: April 11, 1983
    Date of Patent: August 13, 1985
    Assignee: Bodenseewerk Perkin-Elmer & Co., GmbH
    Inventors: Rolf G. A. Tamm, Toma Tomoff
  • Patent number: 4532816
    Abstract: A sample vessel for carrying a sample and storing same in a high vacuum. The vessel includes a hollow body which is open at one end. A specimen carrier plate is coupled by a translating mechanism so that it can slide in and out of said hollow body through the opening. An O-ring seal is provided to seal the carrier plate to the vessel thereby sealing the specimen carried thereby inside the hollow body which can then be evacuated leaving a high vacuum inside.
    Type: Grant
    Filed: July 25, 1983
    Date of Patent: August 6, 1985
    Assignee: The Perkin-Elmer Corporation
    Inventor: Mark C. Miller
  • Patent number: 4533246
    Abstract: In a photometer for measuring atomic fluorescence, a partial light beam is branched off the exciting light beam by means of a mirror having a hole. The partial light beam falls on a scattering disc, from which a reference light beam impinges upon the detector through opposite windows of the measuring cell. A chopper alternately transmits the exciting light beam and the partial light beam. The signal thus obtained at the detector permits compensation of the influence of variations of the light source brightness and of contamination of the windows.
    Type: Grant
    Filed: April 4, 1983
    Date of Patent: August 6, 1985
    Assignee: Bodenseewerk Perkin-Elmer & Co., GmbH
    Inventor: Klaus Braun
  • Patent number: 4532799
    Abstract: A liquid level sensor includes a sensor coil co-axially positioned within a heater coil. Preferably, the sensor is coiled on a core of thin-walled stainless steel tubing to minimize the thermal conductivity along the axis thereof. The probe provides a continuous measurement of the level of a liquid due to the difference in thermal conductivity between the vapor and the liquid within the reservoir.
    Type: Grant
    Filed: June 17, 1983
    Date of Patent: August 6, 1985
    Assignee: The Perkin-Elmer Corporation
    Inventor: Michael J. O'Neill
  • Patent number: 4532628
    Abstract: A memory checking circuit for periodically reading the data from all locations therein. The circuit includes logic to correct and restore data from locations where an error has occurred. The circuit quickly identifies all memory locations present during search mode at a fast rate and reads all present locations at a slower rate during normal mode.
    Type: Grant
    Filed: February 28, 1983
    Date of Patent: July 30, 1985
    Assignee: The Perkin-Elmer Corporation
    Inventor: David J. Matthews
  • Patent number: 4530608
    Abstract: A differential scanning calorimeter includes a baseline correction apparatus which simultaneously corrects for both linear and curvilinear heat flow variation between the sample and reference holders.
    Type: Grant
    Filed: May 14, 1984
    Date of Patent: July 23, 1985
    Assignee: The Perkin-Elmer Corp.
    Inventor: Michael J. O'Neill
  • Patent number: 4506547
    Abstract: Apparatus for use in conducting both static and dynamic thermomechanical analysis includes a load member, one end of which is supported by the sample located in a sample receptacle, eventually in a selected gas atmosphere, in heat equilibrium and the other end of which is loaded statically by a weight or dynamically by the armature of an electromagnet.
    Type: Grant
    Filed: April 4, 1983
    Date of Patent: March 26, 1985
    Assignee: Bodenseewerk Perkin-Elmer & Co., GmbH
    Inventors: Wolfgang Kunze, Bernd Schweckendieck
  • Patent number: 4506136
    Abstract: A plasma flame spray gun suitable for being constructed physically smaller than comparable power prior art plasma flame spray guns. The gun includes a nozzle having a tapering portion on the inlet side thereof. A cathode with a flat tip is positioned to at least partially extend into the tapering portion of the nozzle. A gas distribution ring is located around the cathode for creating a vortex around the cathode tip. This causes the arc formed between the tip and the nozzle to have a root which spins around the perimeter of the nozzle tip resulting in less wear and, therefore, extended part life.
    Type: Grant
    Filed: October 12, 1982
    Date of Patent: March 19, 1985
    Assignee: Metco, Inc.
    Inventors: Richard T. Smyth, Raymond A. Zatorski
  • Patent number: 4455470
    Abstract: A plasma spray gun system with improved nozzle life. The gun includes a nozzle with a thin annular coolant passage and having a dimension optimized for nozzle life. The system also includes a deionizer to remove ions from the cooling fluid and a dissolved gas remover which also improves nozzle life. In addition, the coolant is treated to remove ions which extends nozzle life even more. Further cooling fluid treatment for even further nozzle life includes dissolved gas removal and heat removal.
    Type: Grant
    Filed: August 14, 1981
    Date of Patent: June 19, 1984
    Assignee: The Perkin-Elmer Corporation
    Inventors: John F. Klein, Chandra K. Bhansali, Thomas J. Fox, Richard T. Smyth, Raymond A. Zatorski
  • Patent number: 4450184
    Abstract: A hollow sphere ceramic flame spray powder is disclosed. The desired constituents are first formed into agglomerated particles in a spray drier. Then the agglomerated particles are introduced into a plasma flame which is adjusted so that the particles collected are substantially hollow. The hollow sphere ceramic particles are suitable for flame spraying a porous and abradable coating. The hollow particles may be selected from the group consisting of zirconium oxide and magnesium zirconate.
    Type: Grant
    Filed: February 16, 1982
    Date of Patent: May 22, 1984
    Assignee: METCO Incorporated
    Inventors: Frank N. Longo, Nicholas F. Bader, III, Mitchell R. Dorfman