Did You Know...
...that Robert Adler has the dubious distinction of being the Father of the Couch Potato? Back in 1955 Adler was employed by what was then Zenith Radio Corp., where he was charged to invent something that would allow viewers to turn down the TV volume without leaving their chairs. After a series of flops (such as a wired contraption that people tripped over), Adler hit on the idea of using sound waves. Thus the Remote Control was born...
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| Number | Title | Issue Date |
| 6674654 | DC-DC voltage converter A DC--DC voltage converter has a controller, two switches, a transformer and two rectifying diodes. The transformer has a first winding, a second winding and a center tap. Input voltage is connected between the center tap and ground. An anode of each diod... | 01/06/2004 |
| 6404176 | Push-pull auto transformer A DC-DC voltage converter comprises a controller, two switches, a transformer and two rectifying diodes. The transformer has a first winding, a second winding and a center tap. Input voltage in connected between the center tap and ground. An anode of each... | 06/11/2002 |
| 4815820 | Method and apparatus for aligning a diffraction grating for tuning the output of a laser A method and improved apparatus for aligning a diffraction grating, as, for example, one used in tuning the output of a laser. The total angular misalignment &3xb5; between the incident and diffracted beams is a function of three angles: the tuning angle ... | 03/28/1989 |
| 4814715 | Mixer arrangement for suppression of oscillator interference in quadrature demodulators Mixer arrangement (M) comprising first and second quadrature mixer stages (M1 and M2) to which quadrature mixing signals are applied from an oscillator circuit (F0), these two mixer stages (M1 and M2)... | 03/21/1989 |
| 4810978 | Optical data link The invention concerns an optical detection matrix (9) contained within a cryogenic chamber (3). Electrical image signals produced by the matrix (9) are converted into optical signals and transmitted out of the chamber (3) on lines 42A-42T. The optical si... | 03/07/1989 |
| 4777440 | Magnetic resonance imaging apparatus in which a rotating field is generated and detected In a magnetic resonance imaging apparatus an RF rotating field is generated by applying RF energy to two mutually perpendicular coil systems, a 1/4λ lead being provided between the connection points of the systems. In that case the drive points and the d... | 10/11/1988 |
| 4777627 | Extendible sonobuoy apparatus A sonobuoy has several components slidably mounted in an elongated tube. The components are longitudinally stacked one above the other at the lower end of the tube when the sonobuoy is in a pre-deployed state and are caused to slide longitudinally upwardl... | 10/11/1988 |
| 4769835 | Method of and circuit arrangement for inserting dialling intervals between stored dialling digits A method and apparatus for providing dialling intervals in dialling sequences indirectly dialled by a register in which such sequences are stored, such intervals being in accordance with the dialling intervals produced by a user during direct dialling of ... | 09/06/1988 |
| 4765753 | Method and apparatus for handing-over a radio connection from one radio cell to another radio cell of a digital radio transmission system Base radio stations are spatially arranged in a radio transmission system in accordance with a cellular system, separating the message transmission channels from adjacent base stations being effected either by using the frequency-division multiplex method... | 08/23/1988 |
| 4760354 | SSB pulse modulator An SSB pulse modulator which attenuates unwanted even harmonics of the carrier frequency without expensive filtering. The modulator comprises two pairs of comparators (12, 14 and 16, 18), and the sine and cosine components of the carrier signal are modula... | 07/26/1988 |
| 4760587 | Device for transmitting high-frequency pulses in a certain pattern and a radio-navigation system including such a device This device comprises a high-frequency signal generator (5) fitted with a modulation control input (10) to supply said pulses at its output in relation to a modulation signal applied to its modulation input and a modulation generator (15) to provide the m... | 07/26/1988 |
| 4754453 | Digital radio transmission system with a connection-accompanying organization channel in the time-division multiplex frame Method of digital radio transmission between a base station and a plurality of mobile stations. A time division multiplexed signal frame is generated, including a plurality of time slots which repeat each frame interval. A beginning number of the time slo... | 06/28/1988 |
| 4754223 | Method for the phase correction of MR inversion recovery images During known MRI measurements, for example spin echo and inversion recovery measurements, phase errors occur in pixels, inter alia due to eddy currents caused by the application or interruption of magnetic field gradients during a measurement. There is pr... | 06/28/1988 |
| 4752968 | Antenna diversity reception system for eliminating reception interferences An antenna diversity system for the mobile reception of frequency-modulated oscillations having a receiver, antennae and a diversity processor. An optimum system according to the invention includes an FM tuner with intermediate frequency part (2) and at l... | 06/21/1988 |
| 4748681 | Integrated-services radio transmission system In a two-way radio transmission system, a fixed base station transmits and receives over at least one communication channel a plurality of messages for different types of receivers (TGAx) used in different services (DY). The base station transmits an orga... | 05/31/1988 |
| 4746918 | Split bus system interface A bus system, comprising a bus formed by a plurality of parallel lines for data transmission handshake signals and general management signals, the bus being coupled to a central processor and to a plurality of devices for transmitting and/or receiving dat... | 05/24/1988 |
| 4746927 | VOR antenna design A VOR antenna array with a plurality of radiating antenna elements spaced around and arranged on the periphery of an essentially circular path. The elements extend in the same direction around the periphery of the circular path and a central feed point is... | 05/24/1988 |
| 4743969 | Correlator An input signal comprising pulses in periodical intervals and being present as a series of digital sampling values is applied to a correlator for generating a correlator output signal which assumes an extreme value in the case of a pulse. The correlator c... | 05/10/1988 |
| 4743858 | R. F. power amplifier An r.f. power amplifier, typically a high efficiency, class E amplifier in which a reactive load circuit (18) is connected to a semiconductor switching device (10), the load circuit being designed to have the required input load angle and loaded Q so that... | 05/10/1988 |
| 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 |
| 4739448 | Microwave multiport multilayered integrated circuit chip carrier A multilayered integrated circuit chip carrier has a top layer, a signal line layer, a ground layer, a power conductor layer, and a bottom layer with a separating layer between adjacent layers. Each layer has coplanar conductive and dielectric portions, t... | 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 |
| 4736457 | Circuit arrangement for a tuner for changing over two frequency bands The invention relates to a circuit arrangement for a tuner, particularly a television tuner, for a change over switching between two frequency bands with the aid of a switching diode, said frequency bands, particularly the VHF band and the hyperband, bein... | 04/05/1988 |
| 4736248 | Method and device for generating intermediate picture signals from reference picture signals having a reduced picture frequency A known method of generating intermediate pictures is based on an assumed linear interpolation of the positional change of corresponding objects in successive reference pictures. Such intermediate pictures, however, do not correspond to real pictures, not... | 04/05/1988 |
| 4736163 | Circuit for detecting and suppressing pulse-shaped interferences The circuit arrangement for detecting pulse-shaped interferences in an electrical signal comprises an input (7), a high-pass filter (8) having a cut-off frequency lying between 40 Hz and 1000 Hz, one or two signal paths (25, 25') and an output (5). A sign... | 04/05/1988 |
| 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 |
| 4734701 | Null processing receiver apparatus and method A null processing receiver apparatus that receives and combines together a number of modulated information signals in such a fashion that an interference or jamming signal superimposed on each received signal is substantially eliminated from the combined ... | 03/29/1988 |
| 4733407 | Charge-coupled device The invention relates to a charge-coupled device, in which the channel is provided with two or more separation regions for obtaining a desired charge subdivision, for example, for a transversal filter. Due to asymmetry in the potential distribution betwee... | 03/22/1988 |
| 4730897 | Projection screen having high resolution and good mechanical stability A screen consists of a clear mechanically stable substrate and a bulk diffuser portion which is as close to the front lenticules as possible. The diffuser may be dispersed within the lenticules or in a separate area immediately adjacent to them. The scree... | 03/15/1988 |
| 4730209 | Circuit for converting a colour television time division multiplex signal into simultaneous signals A color television Y/U/V luminance-chrominance multiplex signal with signals which may or may not be compressed in time comprises for a television line the associated luminance information Y and half the chrominance information U or V. As a result the cir... | 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 |
| 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 |
| 4730295 | Apparatus for reading and/or recording a trackwise arranged optical information structure An apparatus for reading and/or recording a trackwise arranged optical structure in a record carrier including a tracking-error detection system with a beam-splitting element and four detectors. The first detector and the second detector cooperate with a ... | 03/08/1988 |
| 4728909 | Linearly frequency-modulated high-frequency oscillator with high external Q factor A high-frequency modulator which is linearly modulated in a frequency range around a center frequency and comprises a high-gain field effect transistor whose output is fed-back to the input from a coupler constituted by two relatively fine lines which are... | 03/01/1988 |
| 4729011 | Method and apparatus for digitizing television signals An arrangement for digitizing television signals, particularly the staircase portion of the vertical interval test signal transmitted by the British Broadcasting Corporation and the Independent Broadcasting Authority comprises a luminance/chrominance sepa... | 03/01/1988 |
| 4727579 | Scrambled television signals A television receiver for receiving scrambled television signals has an arrangement (3) which provides scrambled video components (V) and packet arranged sound/data components (D) some of which are also scrambled. The components (D) are applied to a packe... | 02/23/1988 |
| 4727560 | Charge-coupled device with reduced signal distortion The invention relates to a CCD input and reference charge generator, in which the occurrence of electron injection into the substrate (due to cross-talk to the substrate) and hence undesired signal distortions is prevented. For this purpose, the generator... | 02/23/1988 |
| 4726828 | Method of manufacturing rotationally symmetrical glass bodies A method of manufacturing rotationally symmetrical glass bodies. The starting material for the glass body is a thixotropic suspension consisting of powered glass in a liquid dispersing agent. The suspension is introduced into a hollow mold whose geometry ... | 02/23/1988 |
