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| Number | Title | Issue Date |
| 4709228 | Electronic data input keyboard comprising keys provided with conductive contacts In matrix keyboards whose keys are provided with conductive contacts and are arranged at respective crosspoints of conductors, a diode is connected in series with each key contact in order to allow for n-key rollover, i.e. the simultaneous actuation of se... | 11/24/1987 |
| 4587439 | Pulse generator comprising at least two voltage comparison circuits A pulse generator for generating pulses having pulse edges at instants at which a varying amplitude input voltage is equal to one of at least two threshold values produced by a voltage source. The pulse generator has at least two voltage comparison circui... | 05/06/1986 |
| 4587498 | Circuit for recovering the carrier of an amplitude-and-phase-modulated input signal A circuit for recovering the carrier of an amplitude-and-phase-modulated input signal (in particular QAM signal) is provided with a frequency-controlled oscillator for producing the carrier, with a quadrature detector for supplying signals representing th... | 05/06/1986 |
| 4580237 | Digital tone control arrangement Digital tone control arrangement for a digital audio signal, comprising a recursive digital filter whose transfer function contains as many poles as there are zeros, the recursive filter also comprising a recursive portion and a non-recursive portion each... | 04/01/1986 |
| 4579338 | Video game device with automatic standby mode A video game device for use with a conventional television receiver includes microprocessor-based game control circuitry for generating audio and video signals in accordance with a series of digital instructions contained in a removable game cartridge. A ... | 04/01/1986 |
| 4579473 | Pivot mechanism for television receiver cabinet A pivot mechanism for pivotably mounting a television receiver cabinet on a swivel base includes a molded pivot socket and a molded pivot pin. The pivot socket includes deformable tabs for locking engagement within an aperture in the swivel base. The pivo... | 04/01/1986 |
| 4574302 | Television signal encoder A television signal encoder for luminance and chrominance signals presented in digital form comprises luminance and chrominance channels in which the blanking and color burst signals are inserted digitally before the signals are converted to analogue form... | 03/04/1986 |
| 4571625 | Television camera with a solid-state pick-up device A television camera has a solid-state pick-up device having pick-up elements arranged in rows and columns, wherein a charge transfer can be effected in the columns by means of control electrodes and an associated control circuit. To have the pick-up devic... | 02/18/1986 |
| 4570063 | Device for the optical scanning of a document The device comprises a transducer (3) with photoelectric elements (31) and a coupling member (5) which comprises an entrance face (9) which is to be aimed at the document and an exit face (11) which is optically coupled to the transducer. The coupling mem... | 02/11/1986 |
| 4568978 | Method of a circuit arrangement for producing a gamma corrected video signal A gamma correction factor is applied to a video signal without need of the normally used multiplier by forming the logarithm of the logarithm of the video signal and algebraically adding this signal to a second signal representing the logarithm of the cor... | 02/04/1986 |
| 4568887 | Apparatus for synchronizing the output frequency of a clock oscillator to a data signal The clock signal output of an oscillator is synchronized to the frequency of a data signal by detecting the phase difference between the two signals. The control signal signifying the difference is quantized into a number of standard units and a remainder... | 02/04/1986 |
| 4569072 | Clock-controlled filtering arrangement A clock-controlled filtering arrangement for suppressing a number of interference frequencies related to a clock frequency, which comprises a time-discrete comb filter included in a negative feedback loop for a selective negative feedback of the said inte... | 02/04/1986 |
| 4567522 | Line synchronizing circuit for a picture display device A line synchronizing circuit for a picture display device comprising a voltage-controlled oscillator for generating a signal whose frequency is higher than the line frequency, a frequency dividing circuit for dividing the frequency of the oscillator signa... | 01/28/1986 |
| 4567518 | System for decoding and displaying encoded television pictures An error protection code which acts on subpictures for the transmission of television picture information. First the picture is subpicture-wise transformed (124) by means of transformation functions, for example, Hadamard functions. Of the coefficients th... | 01/28/1986 |
| 4567523 | Television receiver input circuit A television receiver of the type capable of displaying standard VHF and UHF televison signals is provided with a single coaxial antenna input terminal. A passive input circuit within the receiver includes two filter sections for separating the VHF and UH... | 01/28/1986 |
| 4566120 | Loudspeaker system and loudspeaker for use in a loud-speaker system for converting an n-bit digitized electric signal into an acoustic signal A loudspeaker system for converting an n-bit digitized electric signal (11) into an acoustic signal comprises an electrodynamic loudspeaker (1) with n voice-coil sections (4.1, 4.2, . . . 4.n) which cooperate with a magnet system (3). The loudspeaker syst... | 01/21/1986 |
| 4562591 | Digital dynamic range converter 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 d... | 12/31/1985 |
| 4562570 | Video disc turntable having clamping device A turntable for use in a video disc playback unit includes a hub assembly adapted to fit within a central spindle aperture in the disc. The disc is secured in position by a plurality of clamp members pivotally mounted for movement in a radial direction ar... | 12/31/1985 |
| 4560942 | Demodulation circuit having triangular wave for blocking harmonics 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 ... | 12/24/1985 |
| 4561112 | Broadcast receiver with automatic broadcast station storage 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... | 12/24/1985 |
| 4556990 | Tuner A tuner with a radio-frequency pre-stage (1) and a mixer stage (2), provided with an oscillator signal. The mixer is formed by a transistor (12) incorporating an emitter resistor (13) in its emitter circuit. The radio-frequency signal is taken from the ou... | 12/03/1985 |
| 4555729 | System for transmitting television picture information using an error-protection code 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 coe... | 11/26/1985 |
| 4555810 | Distribution system for a local area network A distribution system for a local area network has a distribution unit which is coupled to a plurality of subscribers' premises via optical transmission links. Each subscriber is provided with a terminal unit having an input coupled to an optical transmis... | 11/26/1985 |
| 4539693 | Bit synchronization arrangement for a data modem or data receiver 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 FOS approximately equal to twice... | 09/03/1985 |
| 4528893 | Powered swivel connection for turning hanging loads about an upright axis 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 h... | 07/16/1985 |
| 4517655 | Multiplier circuit for multiplying an information signal by a periodic signal Multiplier circuit for multiplying an information signal x(t) by a periodic signal y(t) having frequency fo, more specifically for amplitude modulation purposes in a stereo decoder. The multiplier circuit comprises N switching circuits 21(k) wh... | 05/14/1985 |
| 4492943 | Device for displaying television pictures and deflection unit therefor 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 f... | 01/08/1985 |
| 4492976 | Line standard conversion circuit for a television signal 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 frequenc... | 01/08/1985 |
| 4475409 | Transducer for dynamometer 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 o... | 10/09/1984 |
| 4465152 | Precision balance with improved immunity to temperature and pressure variations 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 measure... | 08/14/1984 |
| 4451817 | Dynamometer transducer utilizing an amorphous metal 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 ... | 05/29/1984 |
| 4440251 | Scale with simplified guidance-damper construction 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, t... | 04/03/1984 |
| 4440250 | Weighing scale having a hydraulic damper intercoupled between the load receiver and the measuring cell 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 transmis... | 04/03/1984 |
| 4390074 | Operating key for electrical scales 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 on... | 06/28/1983 |
| 4381826 | Weighing scale of unitary construction 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... | 05/03/1983 |
| 4351182 | Oxygen sensor for monitoring exhaust gases 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° C., the palladium changes to palladium oxide at a specific air numbe... | 09/28/1982 |
| 4348611 | Ferroelectric or pyroelectric sensor utilizing a sodium nitrite layer 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 arra... | 09/07/1982 |
| 4328875 | Scale with digital display of available weight range 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 weigh... | 05/11/1982 |
| 4316518 | Automatic zero correction apparatus for weighing balances To achieve an automatic stabilization of the zero point in a scale having a digital display, any difference between the load proportional signal and the stored reference signal (for example, the tare value) is compared to a threshold value. Differences wh... | 02/23/1982 |
| 4316517 | Weighing scale with improved zero correction A stabilization of the zero point of a digital display in a periodically operating weighing scale is accomplished by obtaining the difference between the then-present weight signal S and a stored reference signal, for example the tare value. Resulting dif... | 02/23/1982 |
