Patents Represented by Attorney Marianne Rich
  • Patent number: 4562591
    Abstract: A digital dynamic range converter of the forward control type for varying the dynamic range of a digital audio signal constituted by a sequence of audio signal samples. Each audio signal sample x(n) is multiplied by a control signal sample s(n) which is delivered by a digital control signal generator. This control signal generator has applied to it unipolar signal samples x(n) which are derived via a transmission channel from the audio signal samples x(n). In order to cause this dynamic range converter to respond rapidly to abrupt variations in the audio signal and to render it moreover universally usable, the control signal generator is provided with a digital peak-value detector which converts the sequence of unipolar signal samples x(n) into a sequence of peak-value samples x(n). The latter are applied to a digital non-linear amplitude transformation circuit which has an adjustable amplitude transmission characteristic curve determined by adjustment quantities R and a.
    Type: Grant
    Filed: February 2, 1984
    Date of Patent: December 31, 1985
    Assignee: U.S. Philips Corporation
    Inventor: Eduard F. Stikvoort
  • Patent number: 4561112
    Abstract: A broadcast receiver comprises a mixer to which an aerial signal and an oscillator signal are applied for generating an intermediate-frequency signal. The oscillator signal is produced by a generator and its frequency is determined by a tuning value which is applied to the generator. In addition, the receiver comprises a number of (N) preselection keys to each of which a predetermined fixed tuning value is assigned, so that by operating such a key that relevant tuning value is directly applied to the generator. Assigning a tuning value to a preselection key is effected by a micro-computer. This micro-computer produces a fixed sequence of auxiliary tuning values which are sequentially applied to the generator. The intermediate-frequency signal obtained in response to each auxiliary tuning value is converted into a test value in a conversion circuit. These test values are compared to reference values from a fixed sequence of decreasing reference values.
    Type: Grant
    Filed: July 1, 1983
    Date of Patent: December 24, 1985
    Assignee: U.S. Philips Corporation
    Inventor: Wouterus Ridder
  • Patent number: 4560942
    Abstract: A demodulator circuit for demodulating a signal which varies substantially sinusoidally with time, such as a stereo signal having a carrier frequency, comprises a mixer circuit having a first input with a linear transfer characteristic which receives the stereo multiplex signal u.sub.m to be demodulated and having a second input with a substantially hyperbolic tangent transfer characteristic, the second input receiving a signal u.sub.d. The signal u.sub.d is a voltage having a triangular wave shape superimposed with the triangular wave shape having the carrier frequency. A stereo output signal L and R is produced having minimal third and fifth harmonics of the carrier frequency is produced from a matrix circuit as a result of the triangular shape and amplitude of the signal u.sub.d.
    Type: Grant
    Filed: April 3, 1985
    Date of Patent: December 24, 1985
    Assignee: U.S. Philips Corporation
    Inventors: Dieter Janta, Wolfgang Nolde
  • Patent number: 4555729
    Abstract: An error protection code which acts on subpictures together constituting a television picture for the transmission of data for reconstructing the television picture at the receiving end. First each subpicture transformed by, Hadamard functions. Of the coefficients thus formed, a number of most significant coefficient bits which are associated with low frequency transformation functions are protected against a bit error. Moreover, a comparatively small number of coefficient bits within said number are protected against an additional bit error.
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: November 26, 1985
    Assignee: U.S. Philips Corporation
    Inventor: Leonardus M. H. E. Driessen
  • Patent number: 4539693
    Abstract: In an asynchronous transmission mode, the bit synchronization arrangement receives data signals in the form of binary pulse trains (at A). It includes an oscillator (3) whose output signal (at C) has a frequency F.sub.OS approximately equal to twice the binary rate of the pulse trains and a transition detector (1, 22) which supplies a calibrated voltage pulse (at B.sub.2) at each data signal transition. The oscillator supplies a triangular internal signal (at D) at the frequency F.sub.OS and a phase correction circuit (2) is provided to reduce the algebraic value of the slope of this signal during each calibrated pulse so as to produce a predetermined constant advancing or delaying phase shift according as the calibrated pulse occurs during a negative or a positive ramp of this signal.
    Type: Grant
    Filed: April 25, 1983
    Date of Patent: September 3, 1985
    Assignee: Telecommunications Radioelectriques et Telephoniques T.R.T.
    Inventor: Robert Boudault
  • Patent number: 4528893
    Abstract: A hydraulic motor either of the radial or axial piston type is used for swivelling a hanging load about an upright axis. The motor has a distributor for controlling the flow of hydraulic fluid to the input and drain ducts of the motor. The motor further has hydraulic ducts extending from the stator to the rotor for transmitting fluid required for operation of the actuator of a gripping device or bucket. The distributor floats, so that radial and axial play as well as deformation of the rotor relative to the stator may be taken up without stress. At least some of the hydraulic ducts pass through the distributor, connections being made by suitable rotary transmissions and connecting points within the motor.
    Type: Grant
    Filed: February 10, 1982
    Date of Patent: July 16, 1985
    Assignee: Heinz Thumm Oelhydraulische Antriebe GmbH
    Inventor: Gunther Neumann
  • Patent number: 4517655
    Abstract: Multiplier circuit for multiplying an information signal x(t) by a periodic signal y(t) having frequency f.sub.o, more specifically for amplitude modulation purposes in a stereo decoder. The multiplier circuit comprises N switching circuits 21(k) wherein k=0, 1, . . . N-1 which are each connected to a clock pulse generator 221, 222 by means of a control channel 25(k) and are each connected to an input of an adder device 28 by means of a signal channel 26(k). In addition, each switching circuit 21(k) receives the information signal x(t). A series of clock pulses g(k;t) is applied to each control channel in such a manner that for the control channel having number k these clock pulses occur at the instants t.sub.o +k(T.sub.o /N)+iT.sub.o wherein t.sub.o represents a constant T.sub.o =1/f.sub.o and i=. . . , -2, -1, 0, 1, 2, . . . Each signal channel 26(k) comprises a weighting network 27(k) having a constant weighting factor W(k) defined by the relation W(k)=y(t.sub.o +k(T.sub.o /N)).
    Type: Grant
    Filed: September 10, 1982
    Date of Patent: May 14, 1985
    Assignee: U.S. Philips Corporation
    Inventors: Theodoor A. C. M. Claasen, Albert J. Stienstra, Arthur H. M. van Roermund
  • Patent number: 4492943
    Abstract: An electromagnetic deflection unit is disposed around a portion of a display tube and comprises a first deflection coil for producing, when energized, a frame deflection field and a second deflection coil for producing, when energized, a line deflection field the second deflection coil and being located coaxially within the first deflection coil, each deflection coil having two diametrically oppositely located deflection coil units.
    Type: Grant
    Filed: February 23, 1984
    Date of Patent: January 8, 1985
    Assignee: U.S. Philips Corporation
    Inventors: Albertus A. S. Sluyterman, Nicolaas G. Vink
  • Patent number: 4492976
    Abstract: A television receiving system for converting a video signal of one line standard to a video signal of another line standard. A field delay circuit is provided which separates the video signal of the one line standard into a high frequency and low frequency portion. The low frequency portion of the signal is processed to have a delay during one field different from the delay of a subsequent field. Independent processing means for the high frequency portion of the separated signal is provided. The processed high frequency and low frequency signals are combined to provide a video signal for converting to a different line standard. By processing the high frequency and low frequency portions of the video signal differently, a savings in hardware components is realized without material degradation in performance.
    Type: Grant
    Filed: September 10, 1982
    Date of Patent: January 8, 1985
    Assignee: U.S. Philips Corporation
    Inventors: Marinus C. W. vanBuul, Johannes G. Raven, Wilhelmus H. C. A. van de Ven
  • Patent number: 4475409
    Abstract: The measuring element for a dynamometer consists of a band-shaped substrate of amorphous metal. The band-shaped substrate has one or two necked-down sections on which strain gauge resistors are arranged in the direction of load application. The resistor or resistors may be connected in a bridge circuit together with reference resistors. The load-dependent elongation of the resistors unbalances the bridge circuit to create the desired output measuring signal. Use of a suitable alloy of amorphous metal results in good mechanical characteristic of the measuring element. Specifically, there is a high resistance to creep and to hysteresis effects, while relatively high loads may be measured. Further, such a measuring element is also immune to temperature variations.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: October 9, 1984
    Assignee: Mettler Instrumente AG
    Inventor: Hans-Rudolf Zulliger
  • Patent number: 4465152
    Abstract: Slots are provided in at least one wall or surface common to the weighing chamber and the chamber housing the weighing mechanism. These slots are located so that air currents streaming through them will not affect the weighing dish and thereby the measured results. The slots are preferably located in the bottom near the front wall or the rear wall of the weighing chamber. The air currents can then effect rapid temperature and pressure compensation.
    Type: Grant
    Filed: November 15, 1982
    Date of Patent: August 14, 1984
    Assignee: Mettler Instruments AG
    Inventor: Albert Schmitter
  • Patent number: 4451817
    Abstract: The transducing apparatus for a dynamometer includes a band shaped measuring element which is subjected to a load-dependent tensile force. The measuring element is made of an amorphous metal. It is band-shaped and may have one or two necked-down portions whose resistance varies as a function of applied force. Such measuring element has particularly desirable mechanical characteristics such as high limits of permissible applied force, resistance to creep, low hysteresis, and stability with respect to temperature variations.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: May 29, 1984
    Assignee: Mettler Instrumente AG
    Inventor: Hans-Rudolf Zulliger
  • Patent number: 4440250
    Abstract: A scale has a load receiving member and a force receiving member coupled to the load receiving member by flat springs. The force receiving member transmits the force to be measured to a measuring cell. A hydraulic damper is connected in the force transmission path between the load receiver and the force receiver rather than between the force receiver and the frame of the scale as is current practice. The effects of viscous friction in the damper on the accuracy of the scale are thereby eliminated. The container holding the hydraulic fluid of the damper is sealed by a simple packing ring. Overload protection for the measuring cell is provided by a preloaded spring which is connected in series with the damper in the force transmission path.
    Type: Grant
    Filed: February 5, 1982
    Date of Patent: April 3, 1984
    Assignee: Mettler Instrumente AG
    Inventor: Max Sigg
  • Patent number: 4440251
    Abstract: In a scale wherein the force or load receiver is guided along a vertical path by a parallel guidance system having an upper and a lower plate, the lower plate cooperates with a recess in the lower part of the housing to form an air damper. Specifically, the lower plate of the parallel guidance system constitutes the piston of the air damper. For the scale with a capacitive sensor, the plate constituting the piston of the air damper is a metallic plate which also constitutes the movable plate of the measuring capacitor.
    Type: Grant
    Filed: April 29, 1982
    Date of Patent: April 3, 1984
    Assignee: Mettler Instrumente AG
    Inventor: Peter Kunz
  • Patent number: 4390074
    Abstract: The key provided for manual operations of the functioning of an electrical scale is constituted by an elongated bar which rests on two control switches. The control switches are connected to the control circuit of the scale so that activation of either one will result in the furnishing of the same control signal to the control circuit. The location of force applied to the activating member is immaterial, since no matter where the bar is touched, one or both of the switches will be depressed. This permits the operator to control the functioning of the scale without moving his eyes from the display.
    Type: Grant
    Filed: November 18, 1981
    Date of Patent: June 28, 1983
    Assignee: Mettler Instruments AG
    Inventor: Karl Vogel
  • Patent number: 4381826
    Abstract: A single unit made of a light metal or alloy preferably in a diecast process is shaped to constitute the frame, the levers, and hinged bearings of a platform scale. Even the measuring element can be integrated into this one-piece unit. The resultant scale has a very low profile and is particularly suitable for mass manufacture for applications not requiring excessive resolution as, for example, post office scales or scales for home use.
    Type: Grant
    Filed: October 27, 1980
    Date of Patent: May 3, 1983
    Assignee: Mettler Instrumente AG
    Inventor: Walter E. Kupper
  • Patent number: 4351182
    Abstract: A sensor measuring the partial oxygen pressure in furnace exhaust gas has an active layer of palladium. When the sensor is maintained at a particular temperature, for example about 700.degree. C., the palladium changes to palladium oxide at a specific air number, namely 1.2. The change from palladium to palladium oxide and vice versa causes a change in conductivity by a factor of approximately 20. This change in conductivity is a clearly defined output signal which can be adjusted to occur at any desired air number in the region from 1.05-1.4, depending upon the temperature at which the sensor is maintained. Two sensors may be used, each maintained at a different temperature so that a control region is defined as the air number region wherein the sensor maintained at the lower temperature is oxidized while the second sensor is reduced. Preferably, the active layer consists not only of the metal oxide but also of a ceramic component such as cerium oxide which is doped with 0.5-10% by volume of Nb.sub.2 O.sub.
    Type: Grant
    Filed: March 26, 1980
    Date of Patent: September 28, 1982
    Assignee: Dornier System GmbH
    Inventor: Rainer Schmidberger
  • Patent number: 4348611
    Abstract: A pyroelectric or ferroelectric sensing element consists of a substrate with a thin layer of sodium nitrite. Electrodes may be applied to both sides of the sodium nitrite layer, or, alternatively, only one electrode may be used. In one embodiment, an array of electrodes is applied to one side of a continuous sodium nitrite layer, while the other side has a continuous electrode. In another embodiment, the sodium nitrite layer consists of separate portions, each interposed between one electrode of an electrode array and either the substrate or a second, continuous electrode.
    Type: Grant
    Filed: December 5, 1980
    Date of Patent: September 7, 1982
    Inventors: Wolfgang Ruppel, Ullrich Hetzler, Horst Vogt, Peter Wurfel
  • Patent number: 4328875
    Abstract: In a scale having a digital display, the available weight range, that is the difference between the maximum allowable weight on the scale and the then-present weight on the scale, is displayed in response to activation of the tare key. The available weight range number may be displayed for a predetermined time interval or it may be displayed while the tare key is depressed, release of the tare key causing the normal display of net weight to resume.
    Type: Grant
    Filed: April 7, 1980
    Date of Patent: May 11, 1982
    Assignee: Mettler Instrumente AG
    Inventor: Hans-Peter Lechner
  • Patent number: 4316516
    Abstract: When the difference between the weight proportional signal and the tare value is less than a predetermined threshold value, it is assumed that the zero point is changing. Main difference signals less than the threshold signal are stored and subsequently generated ones algebraically added to the first one. The so-created cumulative difference signal is compared to a predetermined limiting value. When it exceeds the limiting value the cumulative difference signal is divided by the number of differences which together created the cumulative difference signal. The so-formed average difference signal is added to the tare value prior to generation of the next main difference signal.
    Type: Grant
    Filed: October 9, 1980
    Date of Patent: February 23, 1982
    Assignee: Mettler Instrumente AG
    Inventor: Walter Kupper