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"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 5023857 | Optical information storage apparatus including eccentricity compensator An optical information recording and/or read system comprises an optically readable record carrier (1) and an optical read and/or recording apparatus (FIG. 2). The record carrier (1) is provided with substantially concentric tracks (2). The record carrier... | 06/11/1991 |
| 5008740 | Apparatus and method for creating digitally remodulated video from digital components Apparatus and methods for remodulating digital luminance and color difference components for display as PIP information, or together with other composite video components for multi-PIP and test pattern applications are disclosed. A digital encoder is used... | 04/16/1991 |
| 4870508 | Record carrier body with an optical servo track and optical apparatus for writing and reading information from the carrier Disclosed is a system for optically recording information on a disc-shaped record carrier body along an information track, with the write spot being accurately guided in the radial and tangential directions. The record carrier body comprises a servo track... | 09/26/1989 |
| 4866405 | Amplitude modulation apparatus An amplitude modulation apparatus characterized in that a high frequency modulation circuit is provided at the down-stream side of an automatic output control circuit which inputs a low frequency signal, the high frequency signal level of an output of sai... | 09/12/1989 |
| 4864407 | Pick up device having pick up elements arranged in a predetermined pattern and smear component reduction varying independence upon the position of a pick up element in the pattern A sensor (CTD) which is formed with pick-up elements (D) for converting incident radiation (L) into electric charge packets which can be shifted to a sensor signal output (TO) through sensor elements under the control of clock pulse signals (CS1) may be b... | 09/05/1989 |
| 4864643 | Radio transmission system providing adjacent channel and image frequency rejection A radio transmission system a base station comprises a plurality of transmitters arranged to transmit from the same site and having substantially the same output power, each transmitting on an individual channel within a dedicated block of contiguous chan... | 09/05/1989 |
| 4859013 | Magneto-optical waveguide device with artificial optical anisotropy A magneto-optical waveguide device for changing the radiation modes propagating in the structure comprises a magneto-optical layer in which the modes propagate and which is externally magnetized. This magneto-optical layer is carried by a substrate and is... | 08/22/1989 |
| 4860293 | Supervision circuit for a non-encoded binary bit stream An error supervision circuit for a non-encoded binary bit stream running through an elastic store comprising a memory having n locations, the bit rate of the stream supplied to the input of the memory differing from the bit rate of the stream produced at ... | 08/22/1989 |
| 4851785 | Circuit arrangement for detecting whether a predetermined frequency swing is exceeded A circuit arrangement for detecting whether the frequency of an input signal exceeds a predetermined frequency swing. The arrangement includes a detector circuit which supplies an error-indication signal if the phase shift between the input signal and a s... | 07/25/1989 |
| 4850033 | Method of and control arrangement for selecting a control channel by a mobile radio station In prior cellular radio transmission systems a base radio station (BS) periodically transmits references identifying control channels associated with such base radio station, references identifying control channels of adjoining base stations, and referenc... | 07/18/1989 |
| 4847834 | Local area network A local area network including a controller connected to a transmission medium. A plurality of terminals are connected to the transmission medium to initiate a request for an address. Each of the terminals includes a means for locally generating and stori... | 07/11/1989 |
| 4843602 | Apparatus providing extended range of proportional control of the radial excursion of a write/read light spot on the tracks of a disc-shaped record carrier An apparatus for writing and/or reading information in substantially concentric tracks on a disc-shaped record carrier. The tracks are scanned by a beam of radiation focussed into a light spot thereon, and detection means responsive to the light reflected... | 06/27/1989 |
| 4841513 | Sequential buffer device A sequential buffer device for connection to a serially readable memory. The device has an input for serially receiving successive data frames, which frames contain user data, error detection data and error correction data in a predetermined pattern; a ra... | 06/20/1989 |
| 4841564 | DC-supply arrangement for a telecommunication line A switched mode DC power supply circuit for a telecommunication line, including a switched converter for charging an output capacitor from a DC source. The converter is controlled by a periodic control signal having a variable duty cycle so as to maintain... | 06/20/1989 |
| 4839882 | Record carrier with an optically readable trackwise-arranged information structure A record carrier is described with an optically readable trackwise-arranged information structure, and an apparatus for reading said carrier. The distances between the tracks of the information structure vary so that by projecting, in addition to a read s... | 06/13/1989 |
| 4837850 | Hierarchic synchronization method and circuit arrangement for exchanges of a mesh telecommunication network In a mesh telecommunication network in which a hierarchic synchronization method is used for synchronizing the clock pulses of exchanges in such network, a class identification is assigned to the clock pulses of each echange corresponding to a hierarchica... | 06/06/1989 |
| 4829506 | Apparatus for optically scanning an information plane An apparatus for scanning the information plane of an optical record carrier with a radiation beam from a diode laser. The reflected radiation from the information plane is separated from the scanning beam and split into two sub-beams by a composite diffr... | 05/09/1989 |
| 4826270 | Optical scanning apparatus An apparatus is described for optically scanning an information surface by moving said surface relative to a beam, which apparatus comprises a radiation source for supplying a beam, a collimator lens and an objective for focusing the beam to a spot in the... | 05/02/1989 |
| 4823046 | Color picture tube with astigmatism correction means An in-line color picture tube including a deflection unit having a system of deflection coils accommodating two sets of soft magnetic correction elements. The first set is provided in the proximity of the center of the vertical deflection field and symmet... | 04/18/1989 |
| 4819221 | Apparatus for reading record carriers having substantially concentric or spiral tracks A read apparatus for reading a record carrier (1) having a concentric track pattern comprises a scanning device (2, 3) for reading the information, and a separator circuit (4) for extracting a periodic synchronizing signal (Ps) from the information read. ... | 04/04/1989 |
| 4815026 | Slave-type interface circuit A slave-type interface circuit which can receive signals from a bus if the coding A0, A1 and A2 of its inputs S0, S1 and S2 corresponds to that mode of operation. The signals from the bus a... | 03/21/1989 |
| 4810073 | Optical scanning apparatus An optical apparatus is described for scanning an optical record carrier comprising a radiation source supplying a scanning beam, a reflector for directing the scanning beam to the record carrier and an objective lens for focussing the beam to a scanning ... | 03/07/1989 |
| 4807211 | Apparatus for inscribing and/or reading a record carrier An apparatus for recording and/or reproducing information on an optically inscribable and readable disc-shaped record carrier with a previously formed track pattern containing a first track modulation, in order to obtain a clock signal, and a second track... | 02/21/1989 |
| 4807214 | Apparatus for recording and/or reading information on an optical record carrier provided with preformed tracks An apparatus for recording and/or reproducing information in and/or from an optically inscribable and readable disk-shaped record carrier with a pre-formed tracks with a track modulation constituted by a radial wobble, in order to obtain a tracking signal... | 02/21/1989 |
| 4807209 | Record carrier body with a follow-on track and apparatus for recording information thereon A disk-shaped record carrier body for storing information which is recorded thereon by a beam of radiation. The carrier body comprises a follow-on track which is capable of being scanned with an opto-electronic system so as to produce an electrical signal... | 02/21/1989 |
| 4800547 | Optical record carrier scanning apparatus with scanning beam focus error detection Apparatus for scanning the information surface of an optical disc record carrier with a radiation beam. Errors in beam focus on such surface are detected by providing two optical gratings in succession in the path of the radiation reflected from the recor... | 01/24/1989 |
| 4794584 | Method and apparatus for scanning the recording surface of a rotating disc-shaped record carrier A method and apparatus for scanning a plurality of concentric or spiral tracks on the surface of a rotating disc-shaped record carrier with a beam of radiation which may be modulated with information to be recorded on such surface. The beam is produced by... | 12/27/1988 |
| 4794447 | Method and apparatus for transmitting and receiving a high definition NTSC compatible television signal over a single DBS channel in time division multiplex form A high definition television signal having 525 lines per frame, a sequential scan, and 59.94 frames per second is encoded into a time multiplex signal for transmission. The encoder drops alternate line, but creates line difference signals which allow reco... | 12/27/1988 |
| 4789841 | Circuit arrangement for noise reduction at the minimum volume setting of an amplifier The invention relates to a circuit arrangement for a low-frequency amplifier having volume control, particularly in car radios, for noise reduction when the volume control means (10) is set at minimum. The noise reduction is achieved in that the signal pa... | 12/06/1988 |
| 4788591 | Switched-mode power supply for a television receiver provided with a stand-by system Television receiver including a switched-mode power supply which is regulated and capable of functioning both in self-oscillating mode and under the control of a line frequency synchronization. During normal operation there is synchronization, and the lin... | 11/29/1988 |
| 4785350 | TV input source identifier The disclosed circuit determines whether a video signal is from a video tape player or a broadcast signal source by measuring jitter of the vertical synchronization pulses. In one embodiment, every other time interval between the vertical synchronization ... | 11/15/1988 |
| 4783775 | Driver for an objective of an optical scanning unit An optical scanning unit with an objective for the focussing a beam of radiation along an optical axis into a scanning spot on the surface of an information carrier. The scanning unit also has an electromagnetic drive for correcting the position of the ob... | 11/08/1988 |
| 4780626 | Domino-type MOS logic gate having an MOS sub-network The invention relates to a logic MOS gate of the domino type, having a precharging transistor, a validation transistor and logic transistors. To prevent unwanted discharging of a precharged high level, which may be induced by at least one input data being... | 10/25/1988 |
| 4780687 | Differential amplifier circuit for regenerating low-amplitude complementary signals A differential amplifier circuit for regenerating complementary analog signals of low amplitude includes a differential pair of field effect transistors whose common sources are connected to a first supply voltage VSS via a load, a pair of load... | 10/25/1988 |
| 4779080 | Electronic information display systems An electronic information display system which is organized as a reference information display system. The system comprises a reference source in the form of a compact disc CD ROM, which constitutes a mass read-only memory for the system. The disc contain... | 10/18/1988 |
| 4777521 | High voltage semiconductor devices A high voltage semiconductor device includes a two-dimensional array of polygonal regions in a higher resistivity body portion of the opposite conductivity type. The p-n junction between these regions and the body portion may be, for example, a drain junc... | 10/11/1988 |
| 4775806 | Integrated circuit having capacitive process-scatter compensation In integrated circuits the delay of the signal transitions has to lie within specified limits. This delay is partly determined by variations in the manufacturing process (process scatter). To compensate for the effect of this scatter a load capacitance is... | 10/04/1988 |
| 4774522 | Method of recording a binary signal on an optically readable record carrier and apparatus for carrying out the method A method and apparatus are described for recording a binary information signal on a record carrier having an information layer whose optical properties are modified upon heating. An information pattern corresponding to the information signal is obtained b... | 09/27/1988 |
| 4774511 | Universal remote control unit The remote control unit has a selection mechanism for selecting any one of a number of categories of equipment to be controlled. The commands available for keyboard input in any given category are automatically displayed to the user upon selection of the ... | 09/27/1988 |
| 4773055 | Videodisc focusing and tracking servo An electro-optical apparatus comprising an objective (7) scans an optical disc (3) having a transparent protective layer (5) by means of a radiation beam (10) which, through the transparent layer, is focussed on a reflecting recording surface (4). The obj... | 09/20/1988 |
