Patents Assigned to I
  • Snap-fitting
    Patent number: 4135773
    Abstract: A fitting which can be snap-fit into a housing and used as a journal bearing, bushing fastener, or other machine element, comprising a unitary annular body of a resilient polymeric material, with molecular weight greater than 1,000,000. The body has two intersecting peripheral surfaces. A protuberance is located at such intersection to removably retain the body in the housing. The disclosures include steps for making the article. The article features greatly improved wear and life-cycle characteristics over similarly used prior art.
    Type: Grant
    Filed: July 28, 1977
    Date of Patent: January 23, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John G. Van Remoortel
  • Device for braking containers of pneumatic tube transport installations
    Patent number: 4135685
    Abstract: The present invention relates to pneumatic transport installations and more particularly it relates to a device for braking a container train in a pneumatic transport installation. The tube of the pneumatic transport installation has a plug which seals off the tube, and a hole for the discharge of propelling air. The plug may be constituted either by the end wall of the receiving station, or by a previously braked container. Before the plug the tube is provided with a flow-restricting hole intended to let out the air compressed between the container and the plug, the air braking the container in the braking zone. To ensure the optimum braking conditions, the flow-restricting hole is provided with a controllable bypass valve. The valve is actuated by a special control system.
    Type: Grant
    Filed: September 1, 1977
    Date of Patent: January 23, 1979
    Assignee: Vsesojuzny Nauchno-Issledovatelsky I Proektno-Konstruktorsky Institut Po Truboprovodnym Konteinernym Sisteman
    Inventors: Igor I. Girshovich, Vadim Y. Pripadchev, Vladimir Tsernes, Valery I. Bagryantsev, Valery V. Berdnik, Naum Y. Kershenbaum, Jury B. Petrakov, Semen M. Zelvinsky, Tatyana D. Yastrebova
  • Production of HCN from organic nitriles
    Patent number: 4136156
    Abstract: Hydrogen cyanide is produced by reacting an organic nitrile with hydrogen at temperatures of 400-700.degree. C in the presence of selected catalysts. Exemplary is the reaction of benzonitrile and hydrogen at 600.degree. C in the presence of chromia on alumina to produce hydrogen cyanide.
    Type: Grant
    Filed: August 30, 1976
    Date of Patent: January 23, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Frank J. Weigert
  • Stabilized copolyetherester compositions
    Patent number: 4136090
    Abstract: Copolyetheresters are stabilized against oxidative degradation due to exposure to heat and light by incorporating into the polymer effective concentrations of a phenolic antioxidant and copolymerized hindered amine photostabilizer units having the formula ##STR1## wherein A is ethylene and/or propylene, X is a divalent hydrocarbon radical of 2 to 18 carbon atoms and (n + m) equals 5 to 40, said photostabilizer units being connected to ester units in the copolyetherester through ester linkages.
    Type: Grant
    Filed: March 2, 1978
    Date of Patent: January 23, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Guenther K. Hoeschele
  • Extrusion process for recovery of polymers from their dispersions in liquids
    Patent number: 4136251
    Abstract: Polymers are isolated from their dispersions in liquid media in a twin-screw extruder, wherein the screws in the feed area are intermeshing and fully wiping each other and the extruder bore, the polymer dispersion or latex (which is coagulated in the first zone) being conveyed to a high pressure seal zone, liquid being forced upstream and out of the extruder, and the polymer being conveyed through the seal, into a reduced pressure zone, where most remaining liquid is removed, and finally into a pumping zone from which it is extruded. The invention avoids high pressure pumping of polymer dispersions and also is applicable to dispersions of sticky thermoplastic or elastomeric materials, which have caused considerable difficulties in the past.
    Type: Grant
    Filed: September 12, 1977
    Date of Patent: January 23, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Archie R. Bice, Donald K. Burchett
  • Steam-polymer separation apparatus
    Patent number: 4134736
    Abstract: The spiral agitator in a vessel for separating steam from polymer is modified by providing holes in the ribbon flight at locations adjacent to the locations where the ribbon flight is supported by struts for the purpose of allowing the polymer to flow through the holes and sweep the area directly behind the struts to prevent gel buildup in these locations.
    Type: Grant
    Filed: February 22, 1978
    Date of Patent: January 16, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Leon F. Hammond, Jr.
  • Device to effect control over the friction clutch of a transport vehicle
    Patent number: 4134482
    Abstract: A device comprising housing communicating with a pressure source and with e atmosphere through a traversable member operatively interconnected with the engine crankshaft, a link mounted in the housing interior traversably in response to pressure variation thereinside and operatively associated with the clutch actuator. Said link and said traversable member are interconnected through an elastic element. An embodiment of the device of the present invention can be used for transport vehicles with the friction clutches of any type.
    Type: Grant
    Filed: August 20, 1976
    Date of Patent: January 16, 1979
    Assignee: Tsentralny Nauchno-Issledovatelsky Avtomobilny I Avtomotorny Institut
    Inventors: David G. Polyak, Evgeny I. Lebedev, Jury K. Esenovsky-Lashkov, Boris N. Pyatko, Vladimir M. Mosyagin
  • Process for producing a metal hydroxide adduct of a triarylborane
    Patent number: 4134923
    Abstract: Process for producing an alkali and/or alkaline earth metal hydroxide adduct of a triarylborane from the amine adduct thereof which comprises reacting an aqueous mixture of said amine adduct with an alkali and/or alkaline earth metal hydroxide at elevated temperature, e.g., 60-130.degree. C, removing substantially all of the amine liberated during the reaction, e.g., by stripping with an inert gas and thereby forming the metal hydroxide adduct of said borane. The process is preferably applied to the ammonia adduct of triphenylborane which adduct is generated in the treatment of a waste stream from the hydrocyanation process. Sodium is the preferred metal because the sodium hydroxide adduct is an intermediate in the production of triarylboranes which are useful as catalyst promoters.
    Type: Grant
    Filed: September 2, 1977
    Date of Patent: January 16, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ronald A. Reimer
  • Poly(ethylene terephthalate)filaments
    Patent number: 4134882
    Abstract: Poly(ethylene terephthalate) filaments of enhanced dyeability, low boil-off shrinkage (even in as-spun condition), good thermal stability over a large temperature range, and useful as texturing feed yarns and/or as hard yarns requiring no further drawing are prepared by spinning at extremely high speeds, and are characterized by a long period spacing above 300 A in their as-spun condition, and, whether in as-spun condition or after heat-treatment, by a low skin-core value as measured by a differential birefringence in relation to their stress measured at 20% extension (which correlates approximately with the spinning speed), a large crystal size, and low amorphous orientation. The continuous filament yarns may be draw-textured to provide textured yarns which also show enhanced dyeability. The staple fiber yarns also have very useful properties as compared with conventional staple yarns.
    Type: Grant
    Filed: June 2, 1977
    Date of Patent: January 16, 1979
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Hans, R. E. Frankfort, Benjamin H. Knox
  • Method and apparatus for rejuvenating ion sources
    Patent number: 4135094
    Abstract: Ion sources which become coated with insulative materials are rejuvenated by forming the repeller electrode in the ion source of gold and bombarding such repeller electrode with ions to sputter the gold onto the coated surfaces to render them conductive again. Gold sputtering is accomplished by bombarding the gold repeller electrode with inert argon ions.To perform this method, the slit of the extractor plate on the ion source is greatly reduced in cross-sectional area such that the normally higher sputtering pressures may be maintained within the ion source itself. If a direct sample probe is used, it too may be formed of gold and used to provide the gold sputtering source.
    Type: Grant
    Filed: July 27, 1977
    Date of Patent: January 16, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Charles W. Hull
  • Electrical pulse train comparator
    Patent number: 4135082
    Abstract: A digital data acquisition system wherein a succession of electrical impulses whose frequency is characteristic of an operation to be measured is compared with a reference electrical pulse series.
    Type: Grant
    Filed: September 13, 1977
    Date of Patent: January 16, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Raymond S. Borders, Jr., Michael H. Shearon
  • Product and process
    Patent number: 4133844
    Abstract: There is disclosed an acid and disperse dyeable polyolefin composition consisting essentially of from about 80-98% by weight of a polyolefin, from about 1-10% by weight of a N-vinyl-2-pyrrolidone polymer having a moisture regain, measured at 37.8.degree. C and 98% relative humidity, of at least 10% and a ratio of mole fraction of N-vinyl-2-pyrrolidone units in the polymer to moles of water regained for 100 g of polymer of from greater than 0:1 to about 0.3:1, and from about 1-10% by weight of a polyamide having tertiary amine nitrogen atoms, ##STR1## where all three carbon atoms are saturated, said polyamide being normally a solid at 22.degree. C, melting at a temperature of 235.degree. C or below, and having a structure number, N, as defined herein, of from 10-18. At least 25 mole % of all units in the polyamide have a basic tertiary amine nitrogen atom.
    Type: Grant
    Filed: July 22, 1977
    Date of Patent: January 9, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jack D. Taylor
  • Method for obtaining of meat from marine crustacea, especially from Antarctic krill
    Patent number: 4133077
    Abstract: In accordance with the method invented for obtaining meat from the abdomi section of a body of Antarctic krill, a thermal treatment is applied, this treatment being followed by subjecting the treated krill to acceleration by using mechanical, hydraulic or pneumatic means, and to a sudden deceleration (braking), in order to cause the destruction of the krill body and to extract the meat out of the abdominal section of this body, the edible meat of krill being then separated from other non-edible fragments of the body by using a hydro-dynamic or gas-hydro-dynamic method, namely by flotation.
    Type: Grant
    Filed: September 7, 1977
    Date of Patent: January 9, 1979
    Assignee: Prezedsiebiorstwo Polowow Dalekomorskich i Uslug Rybackich "Dalmor"
    Inventors: Zbigniew Jasniewicz, Jan Knyszewski, Tadeusz Osrodek, Lech Stefanski
  • Electrolytic cell with switching means
    Patent number: 4133728
    Abstract: An electrolytic cell is provided for the electrochemical separation of selected metals from electrodissociatable compounds thereof in the molten state utilizing as electrode separator a plurality of solid electrolyte tubes which, under the influence of an electrical potential, are permeable to the flow of selected cations, but impermeable to fluids and the flow of anions and other cations. Electrical switching means are provided with each tube for starting and stopping production of molten metal therein, and for providing a removable electrical path between a cathodic element of the cell and the molten metal in each tube.
    Type: Grant
    Filed: January 26, 1978
    Date of Patent: January 9, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Steven A. Cope
  • Recovery of fluoride values
    Patent number: 4132765
    Abstract: The fluoride values of fluorapatite ores can be recovered by using reactive metal compounds, e.g., the sulfates, phosphates or hydroxides of aluminum, iron, titanium, zirconium, antimony or chromium, to tie up the fluorides during acid attack on the ores and thus minimize the formation of fluosilicic acid. The soluble metal fluoride salts formed can subsequently be separated and treated with acid to recover hydrogen fluoride.
    Type: Grant
    Filed: December 28, 1976
    Date of Patent: January 2, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Paul C. Yates
  • Driverless vehicle shuttle
    Patent number: 4132174
    Abstract: A shuttle vehicle reciprocates between sets of tracks for driverless vehicles. The linear movement of the shuttle vehicle causes a turntable on the shuttle vehicle to rotate. The turntable is adapted to support a driverless vehicle to be transported from one set of tracks to another.
    Type: Grant
    Filed: October 13, 1976
    Date of Patent: January 2, 1979
    Assignee: S I Handling Systems, Inc.
    Inventors: Barry L. Ziegenfus, Russell H. Scheel
  • Abrasive particles consisting of crystalline titanium diboride in a metal carbide matrix
    Patent number: 4132534
    Abstract: This invention relates to abrasive particles and process for their preparation. The particles consist essentially of a matrix of titanium carbide, zirconium carbide and tantalum carbide, at least partially in solid solution form and grains of crystalline titanium diboride dispersed throughout the carbide matrix. These abrasive particles are particularly useful as components of grinding wheels for abrading steel.
    Type: Grant
    Filed: September 27, 1977
    Date of Patent: January 2, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Herbert Valdsaar
  • Stabilizer assembly
    Patent number: 4132324
    Abstract: A stabilizer assembly for a construction vehicle having at least one stabilizer arm which can be pivoted laterally inwardly of the fixed pivot point of an associated fluid cylinder power unit. Preferably the stabilizer arm has a pair of spaced stabilizer arm members which define a passageway therebetween for passage of a single fluid ram during pivoting of the stabilizer arm.
    Type: Grant
    Filed: December 29, 1977
    Date of Patent: January 2, 1979
    Assignee: J. I. Case Company
    Inventor: Elton B. Long
  • Unitized combination starter
    Patent number: 4132967
    Abstract: A unitized combination motor starter includes a unitized insulating base for an electromagnetic contactor section and a circuit breaker section having automatic trip means. The unitized base is part of a common insulating housing for the contactor and circuit breaker sections and circuit elements serially connecting these sections are disposed within the common housing.
    Type: Grant
    Filed: April 29, 1976
    Date of Patent: January 2, 1979
    Assignee: I-T-E Imperial Corporation
    Inventor: Carl E. Gryctko
  • Method of vacuum carburizing
    Patent number: RE29881
    Abstract: A method and apparatus of vacuum carburizing by changing the surface chemistry of a metal article through absorption and thermal diffusion of carbon, wherein oxidizing gases and other impurities are initially removed from the chamber in which the metal article is treated by evacuation and the temperature in the chamber is maintained at a level above normal carburizing temperatures, but at a point that is compatible with the physical characteristics of the chamber and the article; whereafter a source of carbon is introduced into the evacuated chamber in accordance with a preselected cycle and at a concentration that is controlled by the absolute pressure of the carbon in the chamber, so that the carbon is absorbed and diffused into the metal article at a controlled rate.
    Type: Grant
    Filed: March 26, 1975
    Date of Patent: January 16, 1979
    Assignee: C. I. Hayes Inc.
    Inventors: Herbert W. Westeren, Vincent Scotto, Ernest C. Gronquist, Jr., Donald A. Taft