Patents Represented by Law Firm Craig & Antonelli
  • Apparatus for feeding articles
    Patent number: 4339025
    Abstract: A conveyor system for cigarettes and other rod-like articles includes a reservoir consisting of a conveyor which is preferably laterally flexible and moves along a helical path so that a long thin stack of articles can be taken into the reservoir and can be delivered from the reservoir when necessary. The conveyor may consist of a plastic surface member which has a flexible zig-zag shape and is driven by a chain. The conveyor system may be overhead and may receive the articles from an elevator consisting of two parallel bands moving upwards along a sinuous path so as to grip the articles between them.
    Type: Grant
    Filed: April 14, 1978
    Date of Patent: July 13, 1982
    Assignee: Molins, Ltd.
    Inventor: Alan K. McCombie
  • String of a synthetic resin
    Patent number: 4339499
    Abstract: A string for the stringing of rackets, bows, musical instruments and the like which has a thread-like structure of polyvinylidene fluoride. The string is obtained by extruding a rod of polyvinylidene fluoride at a melt temperature of the polyvinylidene fluoride, cooling the rod at a temperature between 60.degree.-150.degree. C., and then axially stretching the rod at this temperature following by cooling the rod to room temperature and thereafter cold-stretching the monofil. The string is characterized by an elasticity that approaches that of natural gut string.
    Type: Grant
    Filed: April 2, 1980
    Date of Patent: July 13, 1982
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Gunther Tappe, Bertram Gasper, Herbert Laubenberger, Richard Weiss
  • Nuclear magnetic resonance spectrometer
    Patent number: 4339717
    Abstract: In a nuclear magnetic resonance spectrometer, this invention relates to an improvement of a lock system for stabilizing a magnetic field intensity. It is an object of the present invention to dissolve a low stability by using a conventional voltage control oscillator and a complex operation in the case of varying a reference material for locking. In the present invention, a radio frequency of a high stable reference frequency source is demultiplied by a variable frequency divider so that a frequency modulation or a modulation of the magnetic field is effected by the output thus demultiplied. When the reference material is changed, the operation can easily be made by varying the demultiplication ratio of the variable frequency divider.
    Type: Grant
    Filed: August 15, 1979
    Date of Patent: July 13, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Munetaka Tsuda, Hiroshi Yokokawa, Yoshiharu Utsumi
  • Method and apparatus for diagnosis of disease
    Patent number: 4338811
    Abstract: A disease diagnostic method and apparatus in which a two-dimensional pattern diagram representing the relation between integrated values of peaks and the retention times in a chromatogram of substances in a body fluid of a subject is obtained to be geographically compared, for disease diagnostic purpose, with a two-dimensional pattern diagram representing the relation between integrated values of peaks and the retention times in a chromatogram obtained through separating and detecting substances in a body fluid of a normal person, and also with two-dimensional pattern diagrams representing the relation between integrated values of peaks and the retention times in chromatograms obtained through separating and detecting substances in a body fluid of abnormal patients classified by diseases.
    Type: Grant
    Filed: October 29, 1980
    Date of Patent: July 13, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Hiroyuki Miyagi, Yoshinori Takata, Junkichi Miura, Mamoru Taki
  • Method of cooling a gas turbine blade and apparatus therefor
    Patent number: 4338780
    Abstract: Part of high-pressure air is extracted from the vicinity of the final stage of a compressor and is introduced into a water spraying chamber, and water at the normal temperature is injected into the high-pressure air from a nozzle installed in the water spraying chamber, to prepare a cooled coolant. The coolant sometimes contains water drops. The cooled coolant is fed into coolant passageways which are provided inside a moving blade in a manner to extend from the root part to the tip of the moving blade. When the coolant passes through the passageways, the moving blade is cooled by the coolant, and after the cooling, the coolant is emitted into a turbine main gas passageway. In case where the water drops are contained in the coolant, they vaporize during the cooling of the moving blade, to cool the air of the coolant, to suppress the temperature rise of the coolant and to enhance the cooling effect.
    Type: Grant
    Filed: November 29, 1978
    Date of Patent: July 13, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Takeshi Sakamoto, Shunichi Anzai, Nariyoshi Kobayashi, Ryoichiro Oshima
  • Method and system for controlling input/output in process control
    Patent number: 4339794
    Abstract: Novel method and system for controlling input/output in a process control wherein state signals of object processes to be controlled are applied to a CPU via a process input/output unit and operated in the CPU in accordance with a logic programmed and stored in advance, and results of the operation are delivered out to the object processes to control the same. A buffer memory is interposed between the CPU and the process input/output unit. While reception and delivery of data are performed between the CPU or processor unit and the buffer memory, fetching of the state signals of the object processes or delivery of the process controlling signals is performed between the buffer memory and the object processes, thereby attaining a high rate processing as viewed from the overall processing of the system.
    Type: Grant
    Filed: September 12, 1979
    Date of Patent: July 13, 1982
    Assignees: Hitachi, Ltd., Nissan Motor Co, Ltd.
    Inventors: Keiji Hideshima, Haruo Koyanagi, Shuichi Senda, Kazuyoshi Asada, Norio Murayama, Yoshiyuki Nihashi, Masaoki Takaki
  • Temperature control system for an element analyzer
    Patent number: 4339201
    Abstract: Disclosed is a system for controlling the temperature of an atomizer for an element analyzer, said system comprising a birefringent prism arranged on the optical axis of radiant light emitted out of the atomizer, and a light sensor for detecting the radiant light which passes through said birefringent prism.
    Type: Grant
    Filed: April 1, 1980
    Date of Patent: July 13, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Makoto Yasuda, Seiichi Murayama, Masaru Ito
  • Column for heat and mass transfer
    Patent number: 4339398
    Abstract: A column for heat and mass transfer between a liquid and a gaseous phase has stage plates of which each is made up of a fixed ring part joined to the wall of the column, and a wheel part fixed to a turning shaft within the column. Each ring part and each wheel part are made bell-shaped or conical and the wheel part is nested within the fixed ring part and has blades on its lower face.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: July 13, 1982
    Inventor: Vaclav Feres
  • Ski brake
    Patent number: 4337964
    Abstract: A ski brake of the type having a pair of brake arms and a boot plate which, when depressed, holds the brake arms in an in-use skiing position and which, when released, enables the brake arms to pivot to an in-use braking position under application of spring force, the brake arms partially overlying the top surface of the ski in the in-use skiing position, is improved with respect to the manner in which the ends of the brake arms are transversely pulled-in during movement to said in-use skiing position. According to a preferred embodiment, this improvement comprises the provision of control elements for achieving the transverse pulling-in of the braking arms that comprise right-angular shoulders on a bearing plate and diverging wire sections on an actuating part of the ski brake.
    Type: Grant
    Filed: September 8, 1980
    Date of Patent: July 6, 1982
    Assignee: GEZE GmbH
    Inventors: Peter Biermann, Ralf Storandt, Rudi Feucht
  • Switch for optical transmission lines
    Patent number: 4337995
    Abstract: Disclosed is an optical switch for changing over the mode connecting two optical transmission lines comprising two optical fibers directly to each other and the mode connecting an optical communication device between the two transmission lines. In this optical switch, in order to reduce the insertion loss, first, second, third and fourth optical fibers, each having an optical connector attached to one end, are attached to a substrate so that at least parts of the respective optical fibers are fixed to the substrate, and the ends of the first and second fibers are arranged on the substrate movably so that the end face of the first optical fiber confronts the end faces of the second and third optical fibers and the end face of the second optical fiber confronts the end faces of the first and fourth optical fibers.
    Type: Grant
    Filed: November 8, 1979
    Date of Patent: July 6, 1982
    Assignees: Hitachi, Ltd., Hitachi Cable, Ltd.
    Inventors: Toshiki P. Tanaka, Minoru Maeda, Satoshi Aoki, Shoji Yamada
  • Tape running time indication system
    Patent number: 4338645
    Abstract: In a video tape recorder or audio tape recorder, the remaining tape length indicated as time or taken-up tape length indicated as time is calculated by use of microcomputer and then accurately indicated as a time length by detecting the angular velocities of a supply reel and a take-up reel. A rotational period of time of each reel is detected twice, so that the tape running speed is calculated from the two detected values and the known tape caliper thickness, thus calculating and indicating the remaining tape length indicated as time and the taken-up tape length indicated as time. The remaining tape length and taken-up tape length indicated as time in such operation modes of a tape recorder as fast forward, and rewind, as well as recording and reproduction are accurately indicated.
    Type: Grant
    Filed: November 2, 1979
    Date of Patent: July 6, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Katsuo Mohri, Yoshinori Okada
  • Induction motor control system and method
    Patent number: 4338558
    Abstract: A sine wave of a frequency to be generated in an inverter is compared with a triangular wave having a frequency N times (N: 15, 9, 3, 1) the frequency of the sine wave, so that a modulated pulse train is generated thereby to control the inverter. This inverter supplies power to an induction motor. With the increase in motor speed, N is reduced until it finally becomes 1. When the inverter transfers from an idle state to an active state, N is inhibited from becoming 1 but set to 3 even if the motor is running at high speed.
    Type: Grant
    Filed: October 23, 1980
    Date of Patent: July 6, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Shigetoshi Okamatsu, Takashi Tsuboi, Masahiko Ibamoto, Hiroshi Narita
  • Voltage polarity switching circuit
    Patent number: 4338656
    Abstract: In a reference voltage generation circuit consisting of a capacitor, a reference voltage source for generating a predetermined voltage for charging the capacitor and a voltage polarity switching circuit for selectively inverting or not inverting the charged voltage of the capacitor to produce an output voltage at an output terminal, and capable of being fabricated in a semiconductor integrated circuit, the improvement wherein the voltage polarity switching circuit includes a second capacitor for compensating for an error between positive and negative reference voltages due to the stray capacitors.
    Type: Grant
    Filed: July 2, 1980
    Date of Patent: July 6, 1982
    Assignee: Hitachi, Ltd.
    Inventor: Kazuo Yamakido
  • Handling rod-like articles
    Patent number: 4338057
    Abstract: A mobile reservoir system for rod-like articles such as cigarettes in which trays are moved in trolleys and each tray is capable of receiving articles in stack formation from an overhead mass flow outlet at a combined loading/unloading station. The mass flow outlet is closable by a rolling gate closure device. Each tray has parallel compartments for simultaneously receiving batches from streams passing from a producing machine and contains captive platforms movable by drive means at the loading/unloading station to progressively lower the articles into each compartment. Articles may be returned through the mass flow outlet by reversal of the drive means and upward movement of the platform; side bands may engage the articles through slots in the trays to aid this upward movement.
    Type: Grant
    Filed: November 1, 1979
    Date of Patent: July 6, 1982
    Assignee: Molins Limited
    Inventor: Desmond W. Molins
  • Automatic gain control apparatus for a motor servo system
    Patent number: 4338554
    Abstract: When the number of revolutions of a motor, or a motor speed is reduced half, a gain of a frequency-voltage converter is doubled. By taking advantage of this fact, a gain of an error signal amplifier disposed at the poststage of the frequency-voltage converter is automatically changed to be half interlocking with a switching operation for switching the number of the motor revolutions to the half.
    Type: Grant
    Filed: April 23, 1980
    Date of Patent: July 6, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Isao Fukushima, Hideo Nishijima, Kenji Satoh, Tunehiko Teshima
  • Method for operating electrophotographic copying apparatus
    Patent number: 4338019
    Abstract: There is disclosed a method for operating an electrophotographic copying apparatus having a latent image forming unit for forming an electrostatic latent image on a recording medium, a development unit for visualizing the electrostatic latent image with a developer containing toner and carrier to produce a visible toner image, and a fixing unit for fixing the toner image. In this operation method, the development unit is raced until the amount of charge on the toner in the developer reaches a predetermined level, and thereafter a usual electrophotographic copying procedure commences, whereby reduction in density of developed images during the initial operation of the electrophotographic copying apparatus can be prevented and developed images of high quality can be obtained.
    Type: Grant
    Filed: November 20, 1980
    Date of Patent: July 6, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Isamu Terashima, Shigeru Uchida, Eiiji Senba
  • Rear of an automobile, preferably a passenger car
    Patent number: 4337976
    Abstract: A rear body construction for an automobile vehicle of the type having a door opening at the rear of the vehicle body, has a body element that closes the door opening by way of horizontal and upright walls that form a receptacle that has a topside open toward the exterior of the vehicle. According to a preferred embodiment, the receptacle has the configuration of a trough (such as found on pick-up trucks) and is constructed so as to be utilized interchangeably with a trunk door (such as a windowed fast-back type hatch) for the purpose of closing the door opening at the rear of the vehicle, the receptacle itself having an upright section that includes a window pane which forms the rear window of the vehicle, even vehicles having front and rear seats.
    Type: Grant
    Filed: January 28, 1980
    Date of Patent: July 6, 1982
    Assignee: Dr. Ing. h.c.F. Porsche Aktiengesellschaft
    Inventors: Anatole Lapine, Reinhold Schreiber
  • Semiconductor pressure detector apparatus with zero-point temperature compensation
    Patent number: 4337665
    Abstract: A semiconductor pressure detector apparatus has a strain--electric signal conversion bridge which is composed of four semiconductor strain gauges, and an amplifier which serves to hold at a predetermined value the sum of currents flowing through the bridge. The midpoints of two arms constituting the bridge are respectively connected to the noninverting inputs of two negative feedback amplifiers. Outputs from the two negative feedback amplifiers are applied to a differential amplifier, and an output proportional to the difference of the outputs of the former amplifiers appears at an output terminal of the latter amplifier.
    Type: Grant
    Filed: February 13, 1980
    Date of Patent: July 6, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Hideo Sato, Kanji Kawakami, Motohisa Nishihara
  • Garnet film for magnetic bubble device
    Patent number: 4338372
    Abstract: A magnetic garnet film for a magnetic bubble memory device in which parts of rare earth element and iron are replaced by predetermined quantities of Gd and Ge, respectively. The garnet film exhibits very small temperature-dependency of the bubble collapse field as well as high Curie temperature, whereby magnetic bubbles of very small diameter can be sustained and controlled with stability over a wide temperature range.
    Type: Grant
    Filed: September 15, 1980
    Date of Patent: July 6, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Norio Ohta, Fumihiko Ishida, Tadashi Ikeda, Keikichi Ando, Yutaka Sugita
  • Process for producing polyimide-amide-carboxylic acid
    Patent number: 4338427
    Abstract: Polyimide-amide-carboxylic acids produced by reacting an aromatic diamine with an aromatic tetracarboxylic acid dianhydride in amounts of 1.5 to 2.0 moles of the latter per mole of the former in the presence of an inert solvent, and reacting the resulting intermediate reaction product with an aromatic diisocyanate in about equivalent amounts at a temperature of 50.degree. to 100.degree. C. while removing generated carbon dioxide from the reaction system are good in heat resistance, wear resistance, chemical resistance, etc.
    Type: Grant
    Filed: April 10, 1980
    Date of Patent: July 6, 1982
    Assignee: Hitachi Chemical Company Ltd.
    Inventors: Iwao Maekawa, Daisuke Makino