Patents Represented by Law Firm Craig and Antonelli
  • Patent number: 4408279
    Abstract: For controlling an internal combustion engine for the acceleration of an automobile, a change in the amount of air passing through an intake manifold is detected and a correction for the fuel injection time is performed on the basis of the change. After the amount of air has reached a substantially constant value, the corrective control is continued for a certain period of time.
    Type: Grant
    Filed: September 6, 1979
    Date of Patent: October 4, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Masumi Imai, Kotaro Hirasawa
  • Patent number: 4393388
    Abstract: A liquid droplet projection apparatus is disclosed which comprises a nozzle arranged at a liquid droplet ejection head, a liquid droplet supply tank, and an electro-mechanical transducer section interposed on the head between the nozzle and the tank. The volume of the electro-mechanical converter means changes in volume in response to an electrical signal pulse applied thereto to cause the nozzle to eject liquid droplets in accordance with the electrical signal. When the pattern of the electrical signal applied to the electromechanical transducer section has an interruption period longer than a predetermined width and three or more successive electrical signals following the interruption period, the amplitude and/or width of the second one of the successive electrical signals is enlarged as compared with the amplitude and/or width of the other electrical signals, thus preventing the diameter of the second liquid droplet ejected following the interruption from being reduced.
    Type: Grant
    Filed: March 10, 1981
    Date of Patent: July 12, 1983
    Assignees: Hitachi Koki Co., Ltd., Hitachi, Ltd.
    Inventors: Yasumasa Matsuda, Kyoji Mukumoto, Syoji Sagae, Masatoshi Kasahara
  • Patent number: 4379231
    Abstract: An electron microscope is disclosed in which an electron beam impinges upon a specimen at a predetermined angle of incidence, the incident azimuth of the electron beam incident upon the specimen is continuously changed, and the electron beam having passed through the specimen is made large in angular spread by a magnifying lens system and then projected onto a viewing screen to form a visual enlarged image of the specimen on the viewing screen; and in which the astigmatism of the magnifying lens system is shown on the viewing screen as the blur of the image.
    Type: Grant
    Filed: March 12, 1980
    Date of Patent: April 5, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Kazuo Shii, Toshiyuki Ohashi
  • Patent number: 4378717
    Abstract: A circuit or control arrangement for an adjusting drive of a press ram of a high-speed cutting press which includes top and bottom dies respectively attached to the press ram and a platen of the press with the top die being adapted to dip or penetrate during a cutting process into the bottom die. An arrangement is provided for maintaining the depth of penetration of the upper die means into the lower die means at a constant value in dependence upon an operating condition of the high-speed cutting press. The maintaining arrangement may include at least one limit switch operatively connected with an oscillator stage which provides adjusting signals to the drive motor. In lieu of a limit switch, a cutting force measuring sensor member may be interconnected with an evaluator circuit and the oscillator means so as to control the drive motor.
    Type: Grant
    Filed: August 1, 1979
    Date of Patent: April 5, 1983
    Assignee: L. Schuler GmbH
    Inventors: Franz Schneider, Ewald Bergmann, Gerhard Gering
  • Patent number: 4375099
    Abstract: A link performance indicator card analyzes incoming analog data from a demodulator on a bit by bit basis and compares the individual bit amplitudes with a fraction of the average bit signal levels. The data bits that lack sufficient amplitude to be clear-cut "high" or "low" pulses are detected as "pseudo-errors". A bit error rate gate signal controls the detectors in order that circuits operate for only one burst or part of a burst per frame always from the same earth station. A comparator is used for comparing the output of the averaged incoming analog signal with the instantaneous value of the analog signal. Alternate clocking signals are used to perform the averaging function and the comparison function of the average signal with the instantaneous signal. This alternation of the signals frees the comparison operation from the influence of any loading on the circuit. The sample points of the incoming analog signal are adjustable by use of delays on the clock signals fed into the circuits.
    Type: Grant
    Filed: April 8, 1980
    Date of Patent: February 22, 1983
    Assignee: Harris Corporation
    Inventors: George W. Waters, Michael B. Luntz
  • Patent number: 4373188
    Abstract: Cigarette-rod weight monitoring system in which the signals from a scanner, e.g. a nucleonic device such as Molins "MODIC", are processed and stored in a memory in a digitized form, and the memory contents are used to drive an analog display device. These signals, which represent the individual cigarettes, or short lengths, are accumulated in the memory over a period which is sufficiently long for a statistically significant distribution pattern to be achieved, so that the shape of the distribution curve can be observed to determine whether it is "normal" or whether any skews or other irregularities are present. In addition the accomulated signals can be analyzed in various ways to provide quantitative measurements of overall standard deviation, or effective standard deviation either side of the mean to show whether any "skews" exist. S.D. can be calculated for whole cigarettes or short lengths for different diagnostic purposes.
    Type: Grant
    Filed: October 9, 1979
    Date of Patent: February 8, 1983
    Assignee: Molins Limited
    Inventors: John G. Dowding, Peter R. Turner, Robert J. Hudson
  • Patent number: 4372859
    Abstract: A method of and a system for removing miniuscule solid particles from liquid wherein the liquid to be processed is supplied to one end of at least one filter element which may be a porous tube filter open at opposite ends and formed with a multiplicity of tiny openings in its wall having a first surface and a second surface. The liquid flows along the first surface and a portion thereof is passed through the tiny openings from the first surface side to the second surface side because of the latter being under lower pressure than the former, to be drawn off as filtrate. The rest of the liquid or a concentrated liquid portion flows out of the other end of the filter element. The flow velocity F of the liquid flowing along the first surface and/or the flow velocity f of the filtrate through the tiny openings is controlled such that the ratio F/f can be kept at a predetermined value.
    Type: Grant
    Filed: August 7, 1980
    Date of Patent: February 8, 1983
    Assignees: Hitachi, Ltd., Hitachi Kyowa Kogyo, Ltd.
    Inventors: Yoshikazu Sugimoto, Kiyotaka Shirosaki, Masashi Kawaguchi, Masaki Takeshima
  • Patent number: 4369707
    Abstract: A short-circuit fuse for electrical igniters with a plug-in connection wherein the short-circuit is automatically eliminated upon a connection of the igniter to a current carrying line. At least one pin-shaped electrode, extending out of the igniter, is surrounded by a common socket with at least one contact spring, arranged at the socket and extending essentially in parallel to the at least one electrode, being normally in contact with the electrode when the igniter is unconnected to the current carrying line. The contact spring has an elongated and leaf-like shape and is electrically conductively connected with either a further contact spring or with the igniter casing. Upon a connection of the igniter to the current carrying line, the contact spring is lifted off the electrode by the insertion of a connector plug.
    Type: Grant
    Filed: July 10, 1979
    Date of Patent: January 25, 1983
    Assignee: Daimler-Benz Aktiengesellschaft
    Inventor: Volker Budde
  • Patent number: 4368354
    Abstract: A discriminator apparatus for a television multivoice system comprises a mixer for mixing a program identifying signal with a reference signal thereby to produce a differential beat signal. A reference signal generator includes a signal source of an original frequency, and a frequency converter for converting the original frequency to the reference frequency which is close to the frequency of the program identifying signal and so selected that the frequency of the differential beat signal is lower than the lowest audible frequency. A low-pass filter is employed for extracting the differential beat signal. Need for expensive mechanical filters of a narrow fractional bandwidth is thereby eliminated.
    Type: Grant
    Filed: January 17, 1980
    Date of Patent: January 11, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Makoto Furihata, Masanori Oguino, Noboru Sakata
  • Patent number: 4366470
    Abstract: A converter includes a voltage selector which employs IGFETs as voltage switching elements, and a controller which controls the IGFETs. Each of the IGFETs in the voltage selector is made either the P-channel type or the N-channel type, depending upon a voltage level to be thereby switched and a level of a binary signal supplied from the controller. As a result, a voltage of comparatively great level can be switched by a binary signal of small level amplitude.
    Type: Grant
    Filed: February 6, 1981
    Date of Patent: December 28, 1982
    Assignees: Hitachi, Ltd., Hitachi Microcomputer Engineering Ltd.
    Inventors: Akira Takanashi, Yasuhiko Ishigami
  • Patent number: 4361866
    Abstract: A power converter for power conversion between an a.c. system and a d.c. system includes a full-wave bridge circuit having GTO connected in at least one arm of the full-wave bridge circuit on the positive polarity side. During a conduction-enabled period of GTO which is determined by a firing phase angle, the GTO is so controlled as to perform current chopping operation by a pulse signal of a predetermined pulse width.
    Type: Grant
    Filed: May 7, 1981
    Date of Patent: November 30, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Seiya Shima, Hiroaki Kuroha, Takeki Ando, Toshiaki Kurosawa, Hiromi Inaba, Yoshio Sakai
  • Patent number: 4361829
    Abstract: A device for indicating engagement or operable condition of turn indicator blinker lights of a vehicle, wherein the vehicle is provided with a gripping member adapted to be contacted by the driver of a vehicle, such as a grip of a handlebar of a motorcycle. A kinetic signal generator is response to the operation or engagement of the turn indicator blinker lights for generating kinetic signal on the gripping member as an indication of operation of the blinker lights.
    Type: Grant
    Filed: April 11, 1979
    Date of Patent: November 30, 1982
    Assignee: Bayerische Motoren Werke AG
    Inventors: Richard Kramholler, Hartwig Lobe, Wolfgang Meyer
  • Patent number: 4361625
    Abstract: A plasticizer-containing film of a partially acetalized polyvinyl alcohol resin contains as the plasticizer a mixture of an ester of an organic cyclic acid and/or a conventional acetal plasticizer for said resin, and an ester of an oxygen acid of phosphorus.
    Type: Grant
    Filed: May 10, 1979
    Date of Patent: November 30, 1982
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Rolf Beckmann, Wilhelm Knackstedt
  • Patent number: 4355845
    Abstract: A roof assembly for vehicles, especially motor vehicles for agricultural purposes, utilizing a roof member having approximately the shape of an inverted trough that is mounted upon a roof frame. The roof is made of plastic, is releasably mounted to the vehicle, and has a segment which rests upon the roof with a sealing element interposed therebetween. This segment cooperates with a supporting part for an upper roof wall and with the roof frame by means of a holding device. In accordance with the preferred embodiment, the upper roof wall has a local extension in the vicinity of the supporting part which rests upon a bent portion of the supporting part, and the holding device is formed by a recess in a peripheral wall of the roof formed by the segment and by an element of the supporting part that projects into the recess.
    Type: Grant
    Filed: April 11, 1980
    Date of Patent: October 26, 1982
    Assignee: Dr. Ing. h.c.F. Porsche Aktiengesellschaft
    Inventors: Hermann Ziegler, Eugen Kolb
  • Patent number: 4354372
    Abstract: A method for producing, from metal strip, a cold roll formed shape strip, curved longitudinally a predetermined amount and having its edge portions on the concave side of the curvature and its web on the convex side thereof to inhibit elongation deformation of portions of the metal strip which constitute the edge portions of the shape strip.
    Type: Grant
    Filed: March 6, 1979
    Date of Patent: October 19, 1982
    Assignee: Hitachi Metals, Ltd.
    Inventors: Takesi Inoue, Kuniaki Okada
  • Patent number: 4353204
    Abstract: A method and system for controlling water level of a drum of a heat recovery steam generator for a combined cycle power plant is provided. The combined cycle power plant includes gas and steam turbines and the steam generator for recovering heat in exhaust gases from the gas turbine and for using the recovered heat to produce and supply steam to the steam turbine. At a start up operation, the water level of the drum is lowered in advance to the plant start up operation so that abrupt rise of the water level due to swelling phenomenon of the boiler water which may result in heat losses by damping water out of the plant is prevented. Also, a gas turbine load increase is maintained at a constant level during a period in which the abrupt water level rise is expected so that the swelling phenomenon is avoided.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: October 12, 1982
    Assignee: Hitachi, Ltd.
    Inventor: Tadao Arakawa
  • Patent number: 4354138
    Abstract: A television camera tube with electrostatic focusing and magnetic deflection comprises in an cylindrical envelope a beam current control, a main lens section and a sixth grid in the form of a mesh electrode. The beam current control section includes a cathode, a first grid and a second grid with an electron beam limiting diaphragm in this order. The main lens section includes third, fourth and fifth grids in the form of cylindrical electrodes disposed in this order. Around the cylindrical envelope is mounted a magnetic deflection coil whose length along the envelope axis is 0.18 to 0.40 times the distance from the beam limiting diaphragm to the mesh electrode.
    Type: Grant
    Filed: October 2, 1980
    Date of Patent: October 12, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Masanori Maruyama, Masashi Mizushima, Masakazu Fukushima, Satoru Miyamoto, Hideyuki Sakai
  • Patent number: 4353727
    Abstract: A mount having a flared portion is so located that it is coaxial with a straight glass tube having an unconstricted end part and that an end face of the flared portion lies slightly inwards with respect to an end face of the glass tube. Subsequently, an outer surface of the end part of the glass tube is uniformly heated, whereby the flared portion and the end part of the glass tube are melted and stuck to each other. At this time, a surface temperature of the whole glass tube except the melted and stuck portion is maintained at or above 40.degree. C. As a result, a fluorescent lamp having good lamp characteristics is fabricated by the use of the inexpensive glass tube.
    Type: Grant
    Filed: July 23, 1981
    Date of Patent: October 12, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Etsuo Urataki, Yoshio Takano, Yoshinobu Tomita, Mitsuru Nakagawa
  • Patent number: 4352649
    Abstract: A system for production of non-woven sheet material by the dry forming method, comprising a moving carrier web to receive a uniformly distributed layer of loose fibres and a fibre distributor unit located above and across the moving web. The distributor unit includes a closed conduit system for conducting a flow of air fluidized fibre material, this closed flow across the web being maintained by blowing action. The conduits located overhead the web are provided with outlet openings constituted by narrow slots or screen wall portion, and compressed air nozzles are arranged so as to cause fibres circulating in said flow crosswise to be moved crosswise in the flow outwardly through the outlet openings, whereby a high distributor capacity is obtained by simple means by forcing fibre material out of the outlet openings in a positive manner as distinguished from outlet by general suction from outside the outlet openings.
    Type: Grant
    Filed: March 20, 1980
    Date of Patent: October 5, 1982
    Assignee: Scan-Web I/S
    Inventors: Edmond M. Jacobsen, Otto V. Nielsen, Torsten B. Persson
  • Patent number: RE31506
    Abstract: In the production of a semiconductor integrated circuit device including a selective oxidation step at a high temperature using a nitride film as a mask for isolating respective element regions in a semiconductor wafer with oxidized regions, electrode contact regions and active regions are successively formed in each element region to be surrounded by the oxidized regions and thin oxide films are formed on exposed surfaces of the electrode contact regions, the thin semiconductor oxide films are removed simultaneously by immersed etching, and then electrode metal layers are formed thereon. The thickness of the oxide layer on which the electrode metal layers are formed is maintained almost uniform to ensure the isolation effect. Since a buried region in each element region is required only to make partial contact with the contact region at the bottom portion, the integration density of the elements in the integrated circuit can be increased.
    Type: Grant
    Filed: September 2, 1980
    Date of Patent: January 24, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Katumi Ogiue, Hiroyuki Kondo, Takashi Ishikawa, Takaaki Mori, Takahisa Nitta