Patents Represented by Attorney Allison C. Collard

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  • Semicontinuous process for the manufacture of pure silicon
    Patent number: 4312850
    Abstract: Pure silicon is obtained in a cyclic process by reducing quartz sand with aluminum; the finely divided quartz is dissolved in an aluminum sulphide slag and is reduced by molten aluminum. The molten aluminum also serves as a solvent for the elemental silicon which crystallizes out and precipitates as the temperature falls. Aluminum oxide formed during the reduction is extracted from the slag and passed on for melt electrolysis in order to recover the aluminum.
    Type: Grant
    Filed: October 14, 1980
    Date of Patent: January 26, 1982
    Assignee: Helictronic Forschungs- und Entwicklungs- Gesellschaft fur Solarzellen-Grundstoffe mbH
    Inventors: Josef Dietl, Claus Holm, Erhard Sirtl
  • Arrangement for baking dry flat bread
    Patent number: 4311088
    Abstract: An arrangement for producing dry flat bread, using flour, water and leaven, biologically fermenting the leaven by mixing flour and water and subsequently cooling mash. The mash is stored for 70 hours. The baking dough is also mixed from flour and water and leaven is added, before further cooling to below 12.degree. C. The dough is baked in baking plate sets. Both leaven and baking dough may be pumped through a pipeline network to successive processing stations. The arrangement comprises leaven and dough storage tanks, a mixing tank, moving containers, remote-controlled valves, a heat exchanger and a cooler, all processing stations controlled from a central control panel.
    Type: Grant
    Filed: September 27, 1979
    Date of Patent: January 19, 1982
    Inventors: Karl Hohn, Olaf Hohn, Wolfgang Hohn
  • Method for the deposition of pure semiconductor material
    Patent number: 4311545
    Abstract: The invention relates to a method and device for making pure semiconductor aterial by thermal decomposition of compounds of the semiconductor material on suitable carrier elements. The quantity and quality of the obtained semiconductor material is increased in accordance with the invention by introducing the compounds to be decomposed into the reactor chamber in at least a partially liquid state through a nozzle having a plurality of discharge openings.
    Type: Grant
    Filed: March 3, 1980
    Date of Patent: January 19, 1982
    Assignee: Wacker-Chemitronic Gesellschaft fur Elektronik-Grundstoffe mbH
    Inventors: Erwin Bugl, Rudolf Griesshammer, Helmut Lorenz, Helmut Hamster, Franz Koppl
  • Bimetallic controlled steam trap
    Patent number: 4311272
    Abstract: A steam trap has a bimetallic control element provided on the prepressure side and a locking part which is biased by the prepressure in the opening direction and which is actuated by the bimetallic control element. The bimetallic control element is provided with at least one bimetallic snap disk and the valve seat is stroke-movably positioned, whereby the maximum stroke path of the valve seat is only a part of the operating stroke of the locking part.
    Type: Grant
    Filed: August 7, 1980
    Date of Patent: January 19, 1982
    Assignee: GESTRA-KSB Vertriebsgesellschaft mbH & Co. KG
    Inventor: Werner Foller
  • Process for the isolation of monochloroacetaldehyde
    Patent number: 4311563
    Abstract: The invention relates to a process for the isolation of chloroacetaldehyde which is obtained as a by-product during the synthesis of acetaldehyde from ethylene and air in an aqueous palladium/cupric chloride solution by the 2-stage process. The mixture to be worked-up to chloroacetaldehyde is taken from the acetaldehyde distillation column and transferred to a distillation and extraction system, where it is fractionally condensed. The chloroacetaldehyde-containing fraction is extracted with water and the aqueous extract is subjected to purification distillation.
    Type: Grant
    Filed: March 31, 1981
    Date of Patent: January 19, 1982
    Assignee: Wacker-Chemie GmbH
    Inventors: Werner Opavsky, Josef Reisner, Alois Maier
  • Deburring apparatus
    Patent number: 4308630
    Abstract: A protective device is provided for a front face deburring of workpieces or profiles, particularly pipes, in a deburring machine having a rotating tool, e.g., a brush or a grinding wheel, or the like, which acts on the workpiece. The device includes an adjustable retaining means mountable on a workpiece retainer means in front of the rotating operating tool for receiving an upstanding interchangeable protective guard and guide plate having an opening for the workpiece.
    Type: Grant
    Filed: April 21, 1980
    Date of Patent: January 5, 1982
    Inventor: Rainer Schmidt
  • Method of producing dry flat bread
    Patent number: 4308285
    Abstract: An arrangement for producing dry flat bread, using flour, water and leaven, biologically fermenting the leaven by mixing flour and water and subsequently cooling mash. The mash is stored for 70 hours. The baking dough is also mixed from flour and water and leaven is added, before further cooling to below 12.degree. C. The dough is baked in baking plate sets. Both leaven and baking dough may be pumped through a pipeline network to successive processing stations. The arrangement comprises leaven and dough storage tanks, a mixing tank, moving containers, remote-controlled valves, a heat exchanger and a cooler, all processing stations controlled from a central control panel.
    Type: Grant
    Filed: November 3, 1978
    Date of Patent: December 29, 1981
    Inventors: Karl Hohn, Olaf Hohn, Wolfgang Hohn
  • Method of purifying metallurgical-grade silicon
    Patent number: 4308245
    Abstract: A method of purifying metallurgical-grade silicon for the production of silicon solar cells is provided, in which metallurgical-grade silicon is dissolved in aluminum and brought into contact with an aluminum sulphide extraction melt. Thereafter, the silicon is crystallized out and separated off by cooling the melt to a minimum temperature of 600.degree. C. The aluminum melt remaining can then be recharged with silicon, heated, brought into contact with the extraction melt, so that additional silicon can be crystallized out.
    Type: Grant
    Filed: October 14, 1980
    Date of Patent: December 29, 1981
    Assignee: Heliotronic Forschungs- und Entwicklungsgesellschaft fur Solarzellen-Grundstoffe mbH
    Inventors: Josef Dietl, Claus Holm
  • Method for lime stabilization of wastewater treatment plant sludges
    Patent number: 4306978
    Abstract: A method for the lime stabilization of wastewater sludge, includes the steps of dewatering sludge so as to produce a sludge cake containing from about 10 to 60% by weight of dry solids and rapidly and intimately mixing and reacting the sludge cake with calcium oxide so as to produce stabilized sludge pellets. An apparatus for performing the process is also provided.
    Type: Grant
    Filed: July 14, 1980
    Date of Patent: December 22, 1981
    Assignee: Willow Technology, Inc.
    Inventor: William O. Wurtz
  • Lawn care device
    Patent number: 4306407
    Abstract: A lawn care device is provided which essentially consists of support beams or rotary cutter blades which are mounted onto the vertically disposed drive shaft of conventional lawn motors. The support beams are provided with receiving means, support-like bars, trunnions and the like, for pivotably mounting work tools thereon. The work tools are moved into an operating position by the forces resulting from the rotation of the support beam and are pivoted to a non-operative position when engaging an obstacle.
    Type: Grant
    Filed: December 18, 1978
    Date of Patent: December 22, 1981
    Assignee: Firma RUX KG
    Inventor: Jurgen Dambroth
  • Process for separating acetaldehyde from mixtures with chloroform, methylene chloride and chlorofuran
    Patent number: 4306092
    Abstract: The invention provides a process by which acetaldehyde can be separated off from mixtures with chloroform, methylene chloride and chlorofuran. In this process, the aldehyde is separated off by adding water to separate the mixture into an aldehyde-containing phase and a phase comprising chloroform, methylene chloride and chlorofuran.
    Type: Grant
    Filed: July 11, 1980
    Date of Patent: December 15, 1981
    Assignee: Wacker-Chemie GmbH
    Inventors: Werner Opavsky, Josef Reisner
  • Process for purifying metallurgical-grade silicon
    Patent number: 4304763
    Abstract: A process is provided for purifying metallurgical-grade silicon for the manufacture of solar cells, wherein the acid treatment of the silicon, known per se, is combined with vacuum evaporation. This may be optionally combined with slag extraction and directional solidification.
    Type: Grant
    Filed: August 11, 1980
    Date of Patent: December 8, 1981
    Assignee: Consortium fur Elektrochemische Industrie GmbH
    Inventors: Josef Dietl, Michael Wohlschlager
  • Detection system
    Patent number: 4303910
    Abstract: A system for monitoring the position of a receptor reradiator in a surveillance zone having a first means for transmitting a first signal through the zone, and a receptor reradiator operable in response to reception of said signal to radiate at least one reply signal which is a function of the first signal and of the position of said receptor reradiator in the zone. There is also a receiver for receiving the reply signal, means controlled by the receiver, dependent upon the reply signal to indicate the position of the receptor reradiator in the zone, and an alarm triggerable by the receiver responsive to the latter for receiving the reply signals.
    Type: Grant
    Filed: April 25, 1978
    Date of Patent: December 1, 1981
    Assignee: Parmeko Limited
    Inventor: John D. McCann
  • Rotary punch having a helically clamped abutment
    Patent number: 4301701
    Abstract: A rotary punch for the production of pre-shaped outer and inner cuts on mng webs or individual blanks of paper or the like, and more particularly, for the preparation of envelopes, flat bags or the like, includes rotating cutting tools whose cutting edges describe an envelope cylinder and at the instant of cutting impinge on a stationary abutment aligned at a slight inclination to the axis of rotation of the tools and so clamped that the operative edge of the abutment is everywhere at the same radial distance from the axis of rotation. The punch has a holder for the abutment, which holder has a bed molded from a curable liquid, and a cutting ledge of circular cross-section which is secured in the bed.
    Type: Grant
    Filed: February 7, 1980
    Date of Patent: November 24, 1981
    Assignee: Winkler & Dunnebier Maschinenfabrik und Eisengiesserei GmbH & Co. KG
    Inventor: Siegfried Fuchs
  • Hot water surface heating device
    Patent number: 4301859
    Abstract: A hot water surface heating device that includes a plurality of coupled individually-prefabricated, plate-like assemblies, each of which includes a base plate, a cover plate and at least one plastic pipe disposed between the base plate and the cover plate. The plates each having a reinforcing layer and an inner surface opposing the inner surface of the other plate provided with at least one channel for the partial receipt therein of the pipe. The heating device is extremely thin and is especially suitable for installation in old buildings.
    Type: Grant
    Filed: May 14, 1979
    Date of Patent: November 24, 1981
    Inventor: Karl Hollemann
  • Process for cementing semiconductor discs to carrier plates and product so obtained
    Patent number: 4300965
    Abstract: Process for cementing semiconductor discs to a carrier plate for subsequent olishing, which comprises applying to the discs a cementing solution being composed of(a) a resin of a melting range between 50.degree. and 180.degree. C. and a melt viscosity between 1000 and 6000 P;(b) a substance acting as plasticizer for the resin at cementing temperatures; and(c) a solvent for the resin and the plasticizer, which evaporizes at cementing temperatures,while avoiding during the application the occlusion of air bubbles between discs and cementing layer, and exerting pressure onto the plates at a temperature between cementing temperatures and 30.degree. C. below the same. The invention also comprises the carrier plate carrying one or more discs cemented thereto by the above process.
    Type: Grant
    Filed: February 7, 1977
    Date of Patent: November 17, 1981
    Assignee: Wacker-Chemitronic Gesellschaft fur Elektronik-Grundstoffe mbH
    Inventors: Dietrich Schmidt, Bruno Meissner, Heinz-Jorg Rath, Dieter Regler, Jurgen Voss
  • Agglomerated mixtures of highly dispersed metal oxides and opacifiers
    Patent number: 4298387
    Abstract: An agglomerated mixture includes 30-95% by weight of highly dispersed metal oxides produced by flame hydrolysis and 5-70% by weight of inorganic opacifiers that have at least one absorption maximum in the range between 1.5 and 10 .mu.m, selected from the group consisting of inorganic oxides and mixed oxides, carbides and nitrides. The invention also relates to a process of manufacturing the mixtures and to their use as heat-insulating material and the like.
    Type: Grant
    Filed: December 11, 1979
    Date of Patent: November 3, 1981
    Assignee: Consortium fur Elektrochemische Industrie GmbH
    Inventors: Gunter Kratel, Hans Katzer, Stephan Loskot, Wilfried Lang, Klaus Weis
  • Self-adhesive crossover foil of metal and polyester
    Patent number: 4298642
    Abstract: A self-adhesive crossover foil for use in security alarm systems consisting of a lead conductor foil, a Mylar insulating foil, adhesively joined to one surface of the lead foil, the Mylar strip being at least as wide as the lead foil, and a pressure-sensitive adhesive, disposed on the exposed surface of the Mylar foil opposite the surface adjoining the insulator to the lead foil. The crossover foil additionally includes a release strip which is coupled to the pressure-sensitive adhesive. In a further embodiment, the Mylar insulating strip is substantially wider than the lead foil strip.
    Type: Grant
    Filed: May 3, 1979
    Date of Patent: November 3, 1981
    Inventor: John W. Walter
  • Belt filter press
    Patent number: 4297215
    Abstract: A belt filter press has a lower and an upper endless filter belt and a lower and an upper endless support belt which support the upper and lower belts in engagement against a lower and upper row of rollers along a press path, respectively, which rows of rollers define therebetween a press slot which is laterally sealed. To effect lateral sealing of the press slot, two additional rows of rollers are disposed on the two opposite sides of either the upper or lower rows of rollers at such an angle that they bend and press the edge of the corresponding upper or lower belts against the other belts.
    Type: Grant
    Filed: March 31, 1980
    Date of Patent: October 27, 1981
    Assignee: Hein, Lehmann AG
    Inventors: Hans J. Altmeyer, Josef Gebel
  • Triple dresser or similar article
    Patent number: D261962
    Type: Grant
    Filed: February 13, 1978
    Date of Patent: November 24, 1981
    Assignee: The Bennington Company
    Inventor: David M. Handel