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| Number | Title | Issue Date |
| 4773090 | Sub-assembly for electrical apparatus and electrical apparatus including such a sub-assembly A sub-assembly (20) of a housing for electronic equipment and which is capable of carrying electronic components. The sub-assembly (20) comprises an injection moulded plastics body having an area (21) in which a regular array of apertures (22) are formed,... | 09/20/1988 |
| 4755714 | Electromagnetic deflection unit for a television picture display tube An electromagnetic deflection unit for a television picture display tube, the deflection unit being arranged around the envelope of the display tube and comprising a first deflection coil and a second deflection coil located more closely to the display tu... | 07/05/1988 |
| 4755991 | Ring shaped digital communication system and method for accessing a message channel in such system A ring-shaped TDM digital communication system and method for enabling stations connected thereto to obtain access to a common message channel available for all of the stations. Access is unambiguously determined by an arbitration procedure which selects ... | 07/05/1988 |
| 4749962 | Clock-signal regenerator comprising a crystal oscillator incorporated in a phase-locked loop The frequency of a voltage controlled crystal oscillator is conventional pulled by means of a varicap diode forming the load capacitance of the oscillator crystal. In order to realize a wider range of frequency pulling, the load capacitance 44 is alternat... | 06/07/1988 |
| 4748615 | Digital TDM switching exchange wherein switching is effected by the read/write sequences of data stores A central exchange comprising at its input end a change-over arrangement having a change-over switch for each input line and at its output end a change-over arrangement of an identical structure having a change-over switch for each output line, which are ... | 05/31/1988 |
| 4748581 | Digital root extraction circuit A circuit for extracting the square root of a 2n-bit input binary number. The circuit comprises n successive subcircuits, the mth such subcircuit consisting of (m+1) add/subtract cells, where 1ࣙmࣘn. The successive subcircuits process succes... | 05/31/1988 |
| 4748663 | Loudspeaking telephone instrument A loudspeaking telephone instrument comprises a transmit path comprising a microphone (1) and comb filter (2); a receive path comprising a comb filter (3), a frequency shifter (4) and a loudspeaker (5); and a hybrid circuit (6). The frequency shifter (4) ... | 05/31/1988 |
| 4746836 | Flat cathode ray display tube A flat cathode ray display tube in which an electron beam (30) is directed firstly in a rear region (24) parallel to a faceplate (14) carrying a phosphor screen (16) and then reversed to travel in the opposite direction in a front region (22) before being... | 05/24/1988 |
| 4747104 | Data transmission system employing a combination of block encoding and convolution encoding for error protection A data transmission system for providing error protection of transmitted data words. The less significant bits of a data word are, by means of matrix multiplication, encoded into a first redundant proto-code word and the more significant bits are, by mean... | 05/24/1988 |
| 4746837 | Color display tube deflection unit which corrects left-right raster distortion A color display tube deflection unit having an annular magnetizable core of tapered cylindrical shape and a raster distortion correction device comprising four pole shoes positioned at the corners of a rectangle adjacent the end of the core facing the dis... | 05/24/1988 |
| 4742316 | Pulse-width modulator A pulse-width modulator comprising a square-wave generator which triggers a monostable multivibrator driven by a controllable constant current source, the multivibrator having a capacitor as a timing element. The output of the multivibrator controls a gat... | 05/03/1988 |
| 4742534 | Telephone receiving equipment for recognizing predetermined combinations of voice-frequency signalling components A telephone signalling receiver comprising speech detectors for respective voice-frequency signalling components of push-button (TDK) signals which are in a frequency band divided into lower and upper frequency subgroups. Each detector calculates the Disc... | 05/03/1988 |
| 4740938 | Apparatus for rapid reproduction of information from a record carrier An apparatus for reproducing information in the form of one or more information blocks in the track of a record carrier, for example a compact-disc digital audio player, is equipped with a memory having n storage locations for storing in each of these sto... | 04/26/1988 |
| 4741027 | Transmission path selection circuit in a telecommunication network In military telecommunication networks a functional dialling number diagram is used independent from the network configuration. As the network structure in a military telecommunication network constantly changes and the subscriber can move to a different ... | 04/26/1988 |
| 4738411 | Method and apparatus for controlling passive projectiles A method and a system for controlling explosive projectiles having homing devices or proximity fuses responsive to the reception of electromagnetic energy reflected from a target. The homing devices and the proximity fuses are passive receiving devices, f... | 04/19/1988 |
| 4737951 | Exchange with error correction A switching exchange in which data on each incoming line are applied to an encoder which produces redundant code words therefrom. The switching matrix is divided into n sub-switching matrices which each transmit a different sub-code word. The outputs of t... | 04/12/1988 |
| 4737987 | Circuit for evaluating call signals in a telecommunication system A simple and inexpensive circuit for evaluating the level and frequency ranges of call signals in a telecommunication system. For level evaluation the circuit comprises a pair of oppositely poled threshold value switches and an opto-coupler connected ther... | 04/12/1988 |
| 4735478 | Optical coupling device for optical waveguides An optical coupling device for coupling a first optical waveguide having an end face and transmitting a number N of signals of different wavelengths with a number N of further optical waveguides having end faces and each transmitting one of these signals ... | 04/05/1988 |
| 4736412 | Method of and circuit arrangement for evaluating the output signals of current flow detectors in telecommunication facilities The flow of direct current and/or ringing alternating current in a telephone line subscriber loop is detected by means of current flow detectors. The output signals produced by the current flow detectors are applied to an evaluation circuit, the zero-cros... | 04/05/1988 |
| 4730145 | Deflection unit having a thin-walled yoke ring for cathode-ray tubes A deflection unit (6) for a cathode-ray tube having a yoke ring (9) of a sintered, oxidic, ferromagnetic material. The yoke ring has a reduced wall thickness with respect to the wall thickness of conventional yoke rings, such reduced thickness being less ... | 03/08/1988 |
| 4730266 | Logic full adder circuit A logic circuit incorporating carry look-ahead in which efficiency can be achieved regarding the hardware for generating the sum signals and carry signals by a suitable choice of the adder gate, making use of the already present signal a1 .mult... | 03/08/1988 |
| 4726291 | Proximity fuse for an artillery projectile of the type having reduced aerodynamic resistance of the base A proximity fuse for an artillery projectile of the type having reduced aerodynamic resistance of the base. The fuse comprises a radar arrangement (1,2,3,4) which supplies a beat signal (Se) to a first chain for activating the trigger device (9... | 02/23/1988 |
| 4726073 | Receiver including a multipath transmission detector A diversity receiver includes a multipath transmission detector which, upon detecting multipath distortion of a received angle-modulated input signal, switches to an alternative receiving antenna. If such a receiver has high selectivity, the detector may ... | 02/16/1988 |
| 4726020 | Multiplex information transmission system A system for transmitting information between at least two stations the information originating from free or engaged channels in a multiplex frame, each station comprising at least one transmitting circuit and one receiving circuit powered from a power su... | 02/16/1988 |
| 4723272 | Telecommunication system, in particular telephone system A telephone communication system comprising a plurality of intercoupled sub-systems each of which comprises a control-unit and at least one peripheral module to which multiple terminals are connected. The control-unit of each sub-system includes destinati... | 02/02/1988 |
| 4723275 | Circuit arrangement for generating an acoustic ringing signal in a subscriber telephone set A subscriber telephone set which comprises a multifrequency dialing tone oscillator, a microprocessor connected thereto for controlling selection of the tones produced thereby, and an acoustic signal element for producing a ringing sound corresponding to ... | 02/02/1988 |
| 4723171 | Electroscopic fluid picture-display device suitable for displaying television images An electroscopic fluid picture-display device suitable for display television images and operating with pulse duration modulation. A picture signal sample-and-hold circuit (S/H) is followed by a pulse duration modulator (UG, DE) which comprises a first el... | 02/02/1988 |
| 4723276 | Two-module telephone terminal A telephone terminal whose structure separates the high voltage and the low voltage functions in separate modules; the high voltage module being specific to the telephone network and the low-voltage module being in conformity with the service provided by ... | 02/02/1988 |
| 4723277 | Loudspeaking telephone set having an anti-Larsen device for instability detection and control A loudspeaking telephone set incorporating an anti-Larsen device which upon detecting instability controls the insertion of an attenuator in either or both of the listening and transmission channels. Such device incorporates a detection circuit (6) for de... | 02/02/1988 |
| 4723318 | Active polyphase filters An active polyphase filter arrangement in which asymmetric poles and zeros are obtained using feedback. In implementing the active polyphase filter arrangement there is provided a feedforward path comprising a first polyphase filter and a feedback path co... | 02/02/1988 |
| 4723303 | Method of and circuit arrangement for measuring the quality of radio-transmission channels of a radio-transmission system Method and apparatus for measuring the quality of the radio transmission channels during the transmission in progress, and for recording co-channel interferences, fast fluctuations caused by interferences are separated from slow fluctuations caused by fad... | 02/02/1988 |
| 4721863 | Circuit for providing DC isolation between a pulse generator and a load A circuit for providing a DC isolation between a pulse generator (E) and a load (CH) of the kind comprising a primary circuit (2), a secondary circuit (4) and at least one magnetization current elimination circuit (12) on the secondary side, characterized... | 01/26/1988 |
| 4720751 | Video recording apparatus which records chrominance information at a lower frequency band coincident with the luminance signal frequency band The present invention provides a transmission method denoted as the "color shift" method. Therein the composite color video signal, which is formed by a sequence of analog line signals, is sampled, as a result of which each analog line signal is converted... | 01/19/1988 |
| 4719451 | Predictive encoding A predictive encoding arrangement for use in a video digital imaging system wherein sequences of codewords are produced by a video signal source corresponding to sequential elements of a video picture, codewords for any given picture element being success... | 01/12/1988 |
| 4718059 | Method of transmitting information in a digital transmission system A method and apparatus for transmitting information from a number of transmitters to a receiver in a digital transmission system in time-division multiplex. So as to prevent to the greatest possible extent overlap of the information transmitted by the res... | 01/05/1988 |
| 4716373 | Method and circuit arrangement for increasing the signal-to-noise ratio of a periodical electrical signal The invention relates to a method of increasing the signal-to-noise ratio of a periodical electrical signal. In general, noise suppression of a periodical signal may be obtained by means of averaging a number of successive signals. In one embodiment of th... | 12/29/1987 |
| 4715119 | Method of manufacturing a plug In accordance with the method, a supporting body (21) is formed by arranging contact members (3) so as to be adjacent and mutually parallel in a straight line and by moulding the contact members in a ribbon-like, flexible plastics body (1) while leaving c... | 12/29/1987 |
| 4714822 | Cooker with means for automatically controlling the heating of a pan with food material Cooker automatically controlling the heating process when bringing a food material to the boil on an electric hotplate and preventing it from boiling over at the end of the heating process. At the beginning of the heating process the power supplied to an ... | 12/22/1987 |
| 4713641 | Electromagnetic deflection unit An electromagnetic deflection unit for a cathode ray tube, comprising has at least one support (4) with a flange (8) at its narrow end (5), which has a tangential groove into which merge radial grooves (14). Two sets of deflection coils (18, 19) are wound... | 12/15/1987 |
| 4712073 | Frequency multiplying circuit A frequency multiplying circuit comprises a differential amplifier formed by two transistors whose emitters are connected by a current source to a low voltage supply rail, collector resistors are connected to a higher voltage rail as is also done with the... | 12/08/1987 |
