Patents Examined by R. V. Rolinec
  • Patent number: 3962631
    Abstract: A circuit for determining a measured value of a rectified a-c voltage of the type having at least one compensation diode for compensating the diode threshold values in the rectifier and which is connected in series therewith, in which the diode is connected in series with the same polarity as the rectifier diodes, a compensation resistor shunted by a voltage divider is connected in series with the compensation diode and an operational amplifier is connected in parallel to the diode and compensation resistor such that the desired compensation voltage always appears across the compensation resistor.
    Type: Grant
    Filed: November 29, 1974
    Date of Patent: June 8, 1976
    Assignee: Siemens Aktiengesellschaft
    Inventor: Herbert Poppinger
  • Patent number: 3961279
    Abstract: A control circuit comprising several CMOS transistors operating in cooperation with certain dimension relationships among the CMOS transistors to provide a first reference voltage to the gates of two current sourcing transistors and to provide a second reference voltage to the gate of a current sinking transistor, the two reference voltages being related, resulting in a desired tracking between the current sinking transistor and the two current sourcing transistors. The current sink transistor operates to current limit at a value which is approximately twice the current limiting value of either of the two current source transistors such that a substantial improvement in circuit performance is obtained.
    Type: Grant
    Filed: January 29, 1975
    Date of Patent: June 1, 1976
    Assignee: National Semiconductor Corporation
    Inventor: Clark W. Davis
  • Patent number: 3961245
    Abstract: An improved flux gate sensor for a magnetic locator or the like employs a housing which enables pivotal adjustment of a tubular magnetic core contained therein in order to adjust the angular orientation of the magnetic axis of the sensor. The housing comprises an elongated bobbin having a longitudinal cavity therein for receiving the core, and an end piece connected to the bobbin. One end of the core is pivotally engaged by the bobbin, the other end of the core being engaged by the end piece which is movable transversely relative to the bobbin to adjust the angular orientation of the core in the housing. The bobbin, which may be formed in one piece or in two identical half sections, has an outer circumferential groove thereon for receiving a signal winding.
    Type: Grant
    Filed: November 20, 1974
    Date of Patent: June 1, 1976
    Assignee: Schonstedt Instrument Company
    Inventor: Erick O. Schonstedt
  • Patent number: 3961251
    Abstract: A large scale integrated (LSI) chip or semiconductor device includes a memory array and associated logic circuitry. The array is "embedded" in the sense that it is not directly accessible, either in whole or in part, from the input and output terminals or pads of the device. To facilitate testing there is added to the device gating means to the memory array and wiring extending from primary access points of the device to the memory array bypassing and in parallel with the logic circuitry. The device further includes control means operatively associated with the gating means for switching the input to the array between the logic circuitry and the primary access points. In the latter condition direct access to the array is permitted, thereby facilitating testing.
    Type: Grant
    Filed: December 20, 1974
    Date of Patent: June 1, 1976
    Assignee: International Business Machines Corporation
    Inventors: William J. Hurley, Hans P. Muhlfeld
  • Patent number: 3961278
    Abstract: A transistor amplifier comprising a first transistor having its base connected to the input terminal of the amplifier and having one of its further electrodes connected through a coupling capacitor to the output terminal of the amplifier. The transistor has the other one of its further electrodes connected to the base of a subsequent transistor having the corresponding electrode of its further electrodes connected through a second coupling capacitor to a second output terminal of the amplifier. The capacitance of the second coupling capacitor is higher than that of the first coupling capacitor.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: June 1, 1976
    Assignee: Novanex Automation N.V.
    Inventor: Robert Ronald Laupman
  • Patent number: 3961222
    Abstract: In a sodium vapor lamp, a means for rapid warm-up and/or maintaining the temperature of the discharge tube in order to quickly achieve and maintain the sodium vapor pressure at a desired level is disclosed. The discharge tube is surrounded with a resistive conductor so as to ohmically heat the tube to a desired temperature, e.g. 270.degree.C. The heating element is a resistive tube coating.
    Type: Grant
    Filed: December 16, 1974
    Date of Patent: June 1, 1976
    Assignee: Xerox Corporation
    Inventor: Charles F. Gallo, Jr.
  • Patent number: 3961252
    Abstract: An LSI semiconductor device includes a memory array incorporating address and data registers, and associated combinatorial and or sequential logic circuitry. The array is "embedded" in the sense that the memory array is not directly accessible, either in whole or in part, from the input and output terminals or pads of the device. To facilitate testing, the address registers and data registers are converted to counters by the addition of an EXCLUSIVE OR circuit to two or more positions of the register. The address and data registers are stepped through all of their states. The data register counter outputs may then be compared with the array outputs, thereby allowing one to check address selection as well as the ability to write or read at each of the storage locations.
    Type: Grant
    Filed: December 20, 1974
    Date of Patent: June 1, 1976
    Assignee: International Business Machines Corporation
    Inventor: Edward B. Eichelberger
  • Patent number: 3961254
    Abstract: An LSI semiconductor device includes a memory array incorporating address, data and buffer registers, and associated combinatorial and/or sequential logic circuitry. The array is "embedded" in the sense that the memory array is not directly accessible, either in whole or in part, from the input and output terminals or pads of the device. To facilitate testing, means which bypass the associated logic circuitry are provided for scanning information directly into the address and data registers. The information so introduced is shifted through the register strings. The interconnections from the associated logic circuitry are inhibited during the testing mode while the information shifting means are inhibited during an operative mode. The information scanned into the registers may be scanned out to determine whether there is a defect or problem in the register strings. Output levels from the array are compared with an expected output.
    Type: Grant
    Filed: December 20, 1974
    Date of Patent: June 1, 1976
    Assignee: International Business Machines Corporation
    Inventors: Joseph R. Cavaliere, Rocco Robortaccio
  • Patent number: 3961242
    Abstract: The emission of the various electron guns of a color cathode ray tube are measured and indicated preferably by a time sharing multiplexing technique where bright intensity producing emission generating voltages are fed between th cathode and control or accelerator electrodes of the various electron guns preferably in rapidly repeated sequence. The switching rate is preferably many times per second so the emission current values are displayed as steady indications on the faces of current meters with meter movements which respond to the average emission curent of the associated electron gun.
    Type: Grant
    Filed: April 30, 1975
    Date of Patent: June 1, 1976
    Assignee: Dynascan Corporation
    Inventor: Gus C. Rose
  • Patent number: 3960438
    Abstract: Electrically controllable reflective displays are formed which utilize ambient light and which can be viewed from a wide angular view.
    Type: Grant
    Filed: December 1, 1972
    Date of Patent: June 1, 1976
    Assignee: Honeywell Inc.
    Inventor: Ulrich Bonne
  • Patent number: 3961249
    Abstract: A particle analyzer for obtaining a narrow distribution of particles suspended in a liquid wherein electric pulses are produced by moving the liquid through a sensing zone. The analyzer includes elements for differentiating the pulses, short circuiting to ground pulse portions of one state and measuring the heights of pulse portions of another state as indications of particle sizes.
    Type: Grant
    Filed: July 18, 1975
    Date of Patent: June 1, 1976
    Assignee: Coulter Electronics, Inc.
    Inventor: Wallace H. Coulter
  • Patent number: 3961255
    Abstract: In a phase lock loop, the bandwidth of the phase error signal, when used for phase measurement outside the loop, is increased by summing the error signal with an integrated version of the VCO control signal derived from the loop filter circuit. The combined effect on the error signal of both the loop filter circuit and the integration provides a boost effect at low frequencies, which when summed with the unprocessed error signal results in a broadband measurement signal with a low frequency cut-off below the low-frequency cut-off of the loop itself. This technique permits extending the bandwidth of the measurement signal without affecting loop operation.
    Type: Grant
    Filed: August 15, 1974
    Date of Patent: June 1, 1976
    Assignee: Hekimian Laboratories, Inc.
    Inventor: Norris C. Hekimian
  • Patent number: 3961258
    Abstract: A pulse time interval measuring system in which a desired input signal is selected from among a plurality of input signals each consisting of a plurality of pulse signals, and the time interval between predetermined pulse signals in the desired input signal is measured by a CR time constant circuit to give a digital display of such time interval.
    Type: Grant
    Filed: August 26, 1974
    Date of Patent: June 1, 1976
    Assignee: Daido Metal Company, Ltd.
    Inventor: Nobukazu Morisaki
  • Patent number: 3961241
    Abstract: The emission of the various electron guns of a color cathode ray tube are measured and indicated by a time sharing multiplexing technique where emission generating voltages are fed to the electrodes of the various electron guns in rapidly repeated sequence and the degree of emission thereof is displayed simultaneously on the faces of current meters responsive to average current flow. Such a technique permits simultaneous display of emission current for in-line cathode ray tubes having commonly connected control and/or accelerator electrodes, where individually adjustable spot cut-off voltages are sequentially connected to the set of commonly connected electrodes involved in synchronism at any given instant with the connections of the cathode electrode thereto which is to be assigned to the adjustable voltage involved.
    Type: Grant
    Filed: April 30, 1975
    Date of Patent: June 1, 1976
    Assignee: Dynascan Corporation
    Inventors: Richard Goldstein, Harold Feldman
  • Patent number: 3961218
    Abstract: A discharge promotion member for a discharge display device consisting of a conductive plate which is provided with a plurality of apertures therethrough, and an insulating porous layer formed on the surface of the conductive plate. The discharge promotion member is located between a cathode and an anode or the like of the discharge display device in which a glow light discharge is carried out through the aperture of the discharge promotion member by a plasma discharge between the cathode and anode of the discharge display device.
    Type: Grant
    Filed: March 24, 1975
    Date of Patent: June 1, 1976
    Assignee: Okaya Denki Sangyo Kabushiki Kaisha
    Inventor: Satoshi Watanabe
  • Patent number: 3959688
    Abstract: A circuit for switching storage capacitors in a high voltage xenon flash tube circuit includes at least one storage capacitor with parallel low and high resistance paths in series with the capacitor, switching means selecting one of the two paths and a time delay device triggering discharge of the tube at a predetermined interval, the discharge time constant of said one capacitor being a substantial portion of the triggering interval. The time delay device enables operation of the switching means a substantial time after triggering discharge.
    Type: Grant
    Filed: January 3, 1975
    Date of Patent: May 25, 1976
    Assignee: GTE Sylvania Incorporated
    Inventors: Robert P. Bonazoli, Ellison H. Kirkhuff
  • Patent number: 3959682
    Abstract: Electric lamp having a hermetically sealed gas-filled hard-glass or vitreous-silica lamp envelope provided with a current lead-in which is sealed into a portion of the lamp envelope and comprises a foil mainly consisting of molybdenum and a current supply lead mainly consisting of tungsten which is secured to the foil by a welded joint and extends into the lamp envelope. The welded joint contains iron or an alloy of at least 50% by weight of iron and one or more of the elements scandium, titanium, vanadium, chromium, manganese, cobalt, nickel and copper as the welding agent.
    Type: Grant
    Filed: February 27, 1975
    Date of Patent: May 25, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Gustaaf Adolf Wesselink, Arie Koelewijn, Hendrik Roelofs
  • Patent number: 3959722
    Abstract: A test circuit for testing high voltage circuit breakers, the circuit being capable of providing a transient recovery voltage of a predetermined form to test the breaking capacity of circuit breakers. The test circuit comprises a first multi-parameter network for producing low frequency components of the transient recovery voltage, which network is constituted of a first inductance connected in series between a H.V. source and a circuit breaker, and of a capacitance-resistance unit connected to the output of the first inductance. A second multi-parameter network is provided for producing high frequency components of the transient recovery voltage. This second network is connected in series with the unit. The second network and the unit are connected across the terminals of the circuit breaker undergoing test.
    Type: Grant
    Filed: November 18, 1974
    Date of Patent: May 25, 1976
    Assignee: Institut de Recherches de l'Hydro-Quebec (IREQ)
    Inventor: Vojislav Narancic
  • Patent number: 3958867
    Abstract: An eyeglass structure for both corrective bifocal lenses and lenses for modifying light intensity wherein means are provided for changing the physical positions of the lenses on the frame to modify the optical characteristics thereof.
    Type: Grant
    Filed: May 17, 1974
    Date of Patent: May 25, 1976
    Inventor: J. Robert Morgan
  • Patent number: 3958142
    Abstract: A duplicator for making copies of a microfiche master. The master is positioned at a transfer station and a copy film is stored on a supply roll and incrementally advanced to the transfer station by a film drive disposed upstream of the transfer station so that fresh copy film is pushed downstream into registration with the master. Pressurized air supply conduits are disposed between the drive means and the transfer station and are activated so that the copy film moves downstream on an air cushion to minimize copy film drag and sticking. A film cutter is disposed immediately downstream of the transfer station in substantial registration with a downstream edge of the master to eliminate copy film waste. Exposed copy film is transported past a developing station and a curing station to a copy film discharge station.
    Type: Grant
    Filed: August 29, 1974
    Date of Patent: May 18, 1976
    Assignee: Quantor Corporation
    Inventor: Paul N. Seitz