Patents Examined by R. V. Rolinec
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Patent number: 3962631Abstract: 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: GrantFiled: November 29, 1974Date of Patent: June 8, 1976Assignee: Siemens AktiengesellschaftInventor: Herbert Poppinger
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Patent number: 3961279Abstract: 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: GrantFiled: January 29, 1975Date of Patent: June 1, 1976Assignee: National Semiconductor CorporationInventor: Clark W. Davis
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Patent number: 3961245Abstract: 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: GrantFiled: November 20, 1974Date of Patent: June 1, 1976Assignee: Schonstedt Instrument CompanyInventor: Erick O. Schonstedt
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Patent number: 3961251Abstract: 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: GrantFiled: December 20, 1974Date of Patent: June 1, 1976Assignee: International Business Machines CorporationInventors: William J. Hurley, Hans P. Muhlfeld
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Patent number: 3961278Abstract: 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: GrantFiled: February 18, 1975Date of Patent: June 1, 1976Assignee: Novanex Automation N.V.Inventor: Robert Ronald Laupman
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Patent number: 3961222Abstract: 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: GrantFiled: December 16, 1974Date of Patent: June 1, 1976Assignee: Xerox CorporationInventor: Charles F. Gallo, Jr.
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Patent number: 3961252Abstract: 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: GrantFiled: December 20, 1974Date of Patent: June 1, 1976Assignee: International Business Machines CorporationInventor: Edward B. Eichelberger
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Patent number: 3961254Abstract: 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: GrantFiled: December 20, 1974Date of Patent: June 1, 1976Assignee: International Business Machines CorporationInventors: Joseph R. Cavaliere, Rocco Robortaccio
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Patent number: 3961242Abstract: 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: GrantFiled: April 30, 1975Date of Patent: June 1, 1976Assignee: Dynascan CorporationInventor: Gus C. Rose
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Patent number: 3960438Abstract: Electrically controllable reflective displays are formed which utilize ambient light and which can be viewed from a wide angular view.Type: GrantFiled: December 1, 1972Date of Patent: June 1, 1976Assignee: Honeywell Inc.Inventor: Ulrich Bonne
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Patent number: 3961249Abstract: 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: GrantFiled: July 18, 1975Date of Patent: June 1, 1976Assignee: Coulter Electronics, Inc.Inventor: Wallace H. Coulter
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Patent number: 3961255Abstract: 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: GrantFiled: August 15, 1974Date of Patent: June 1, 1976Assignee: Hekimian Laboratories, Inc.Inventor: Norris C. Hekimian
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Patent number: 3961258Abstract: 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: GrantFiled: August 26, 1974Date of Patent: June 1, 1976Assignee: Daido Metal Company, Ltd.Inventor: Nobukazu Morisaki
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Patent number: 3961241Abstract: 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: GrantFiled: April 30, 1975Date of Patent: June 1, 1976Assignee: Dynascan CorporationInventors: Richard Goldstein, Harold Feldman
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Patent number: 3961218Abstract: 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: GrantFiled: March 24, 1975Date of Patent: June 1, 1976Assignee: Okaya Denki Sangyo Kabushiki KaishaInventor: Satoshi Watanabe
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Patent number: 3959688Abstract: 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: GrantFiled: January 3, 1975Date of Patent: May 25, 1976Assignee: GTE Sylvania IncorporatedInventors: Robert P. Bonazoli, Ellison H. Kirkhuff
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Patent number: 3959682Abstract: 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: GrantFiled: February 27, 1975Date of Patent: May 25, 1976Assignee: U.S. Philips CorporationInventors: Gustaaf Adolf Wesselink, Arie Koelewijn, Hendrik Roelofs
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Patent number: 3959722Abstract: 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: GrantFiled: November 18, 1974Date of Patent: May 25, 1976Assignee: Institut de Recherches de l'Hydro-Quebec (IREQ)Inventor: Vojislav Narancic
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Patent number: 3958867Abstract: 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: GrantFiled: May 17, 1974Date of Patent: May 25, 1976Inventor: J. Robert Morgan
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Patent number: 3958142Abstract: 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: GrantFiled: August 29, 1974Date of Patent: May 18, 1976Assignee: Quantor CorporationInventor: Paul N. Seitz