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| Number | Title | Issue Date |
| 4829521 | Test circuit for detecting short duration pulses A test assembly for automatically testing and diagnosing digital printed-circuit boards has a driver circuit for supplying a stimulus pulse to the circuit board to be tested, a sensor circuit for detecting the output from the circuit board in response to ... | 05/09/1989 |
| 4190861 | Method and arrangement for redundancy-reducing picture coding With known methods for predictive decorrelation this decorrelation only applies to one or more previously scanned elements of the same picture line. In accordance with the invention a picture to be scanned is divided into sub-pictures wherein a number of ... | 02/26/1980 |
| 4188540 | X-ray apparatus comprising a weight compensation device An X-ray apparatus, comprising a weight compensation device which is suspended from the ceiling and which includes a carriage which is displaceable along the ceiling. A component is displaceable along a patient table is suspended from the carriage by mean... | 02/12/1980 |
| 4188640 | Apparatus for making laminar radiograms In tomosynthesis, as is known, a series of individual images taken in different orientations, are superimposed. By shifting the individual images relative to each other the position of the layer which is sharply reproduced can be changed. However, there m... | 02/12/1980 |
| 4186728 | Apparatus for adapting a skull for the application of a pressure transducer Means for adapting a skull for the application of a pressure transducer comprising a hollow screw which can be introduced into the skull and which can accommodate the pressure transducer, a tool for introducing the screw, and an indicator for indicating w... | 02/05/1980 |
| 4184487 | Electrocardiograph An electrocardiograph for recording electrocardiograms on fan-folded paper, comprising a manually operable derivation selection switch and a motor control member for the paper transport motor. The paper transport is automatically stopped when the recordin... | 01/22/1980 |
| 4185236 | Current stabilizer A current stabilizing arrangement with a first and a second current circuit in which currents with a fixed ratio relative to each other are sustained. These currents respectively flow through a first semiconductor junction and a second semiconductor junct... | 01/22/1980 |
| 4184043 | Method of providing spacers on an insulating substrate In a method of providing spacers on an insulating substrate, by which spacers the thickness of a connection between an electrical component and a substrate is adjusted, the spacers are rigidly provided on the substrate as a thick film pattern simultaneous... | 01/15/1980 |
| 4183037 | Semiconductor device The invention relates to a semiconductor device in which a crossing connection is realized by using parts of a layer of refractory conductive material already present for masking as a part of a current conductor separated from a crossing conductor by an i... | 01/08/1980 |
| 4180859 | System for measuring the speed of rotation of a synchro by means of a sampling technique By combining three single-phase output voltages of a synchro, signals are obtained which are proportional to the sine and the cosine of the angle of rotation of the synchro shaft. Said signals are sampled at predetermined instants by switching means contr... | 12/25/1979 |
| 4180067 | Apparatus for delivering fluids with controlled rates of flow An apparatus for delivering fluid at a controlled rate of flow wherein fluid is forced from a container by the piston of a vacuum cylinder. A flow restricting valve is provided, either at the output of the container or at the output of a second cylinder w... | 12/25/1979 |
| 4180828 | Hybrid circuit having a semiconductor circuit A hybrid circuit comprises an insulating substrate which is provided with conductors and on which a semiconductor circuit is provided consisting of a semiconductor element connected to an insulating flexible foil having conductor tracks, and in which the ... | 12/25/1979 |
| 4179687 | Analog-to-digital converter circuit employing iterative subtraction An analog-to-digital conversion circuit having a number of series-connected stages, each stage determining the difference between a signal current input and a reference current input, and at positive values of said difference transferring a current propor... | 12/18/1979 |
| 4178510 | Device for measuring the spatial distribution of radiation absorption in a slice of a body In third-generation transversal tomography scanners, where the total body slice to be examined is irradiated by a flat, fan-shaped radiation beam, the probability that a detector which measures part of the radiation in the radiation beam becomes defective... | 12/11/1979 |
| 4178102 | Process and apparatus for measuring the concentration of a molecule of selective spectrum in a sample substance A method and apparatus are described for measuring the concentration of a molecule of selective spectrum in a sample substance in which errors from spurious light signals due to diffused light or from spurious fluorescent or phosphorescent light due to tr... | 12/11/1979 |
| 4178620 | Three state bus driver with protection circuitry A protective circuit arrangement for three state bus drivers, incorporating insulated gate field effect transistors, affords protection against short circuiting of the output bus. The protective circuit senses the short circuit condition at the output bus... | 12/11/1979 |
| 4177094 | Method of treating a monocrystalline body utilizing a measuring member consisting of a monocrystalline layer and an adjoining substratum of different index of refraction A method in which a monocrystalline body is subjected in a gas atmosphere to a treatment for changing the thickness of the body, in which the thickness of the body is controlled by means of a measuring member which is subjected to the same treatment and w... | 12/04/1979 |
| 4177406 | Circuit for adjusting tube anode current in an X-ray generator Filament current values associated with different X-ray tube anode currents and voltages are stored in various locations of a memory. For an X-ray exposure, the measured value of filament current or anode current is compared with the values stored and the... | 12/04/1979 |
| 4176336 | Lacquer-encapsulated carbon film resistor A lacquer-encapsulated carbon film resistor having a ceramic substrate coated with a carbon film, a silicon nitride layer, an organic lacquer layer and termination electrodes.... | 11/27/1979 |
| 4176016 | Forming electrically insulating layers by sputter deposition A method of making inclined sides on a metal pattern which is grown on a substrate by electroplating as a preliminary measure to the coating of the substrate with the metal pattern by an insulating layer. The main deposition of the insulating layer by spu... | 11/27/1979 |
| 4172756 | Method for the accelerated growth from the gaseous phase of crystals, and products obtained in this manner A method of growing gallium arsenide crystals obtained by reaction of a first gaseous phase containing hydrogen and arsenic trichloride and a liquid gallium phase, in which the reaction forms a second gaseous phase from which gallium arsenide is deposited... | 10/30/1979 |
| 4172269 | Circuit for overshoot supression in X-ray generators Transient voltage overshoot is known to occur when primary current in a multi-phase X-ray generator high voltage transformer is switched on. Transient overshoot is supressed by connecting an impedance in series with the primary current switch. A second sw... | 10/23/1979 |
| 4171509 | Bridge drive circuit and method A bridge circuit for a measurement bridge of the type using four impedance arms provides an output referenced to ground which is a function of the impedances in the respective arms. The bridge circuit includes an impedance bridge comprising first, second,... | 10/16/1979 |
| 4169755 | Growth of crystalline rods of gallium arsenide in a crucible of specially treated fibrous silicon dioxide A method of manufacturing a rod of crystalline material in a crucible formed at least partly by a fabric of refractory fibrous material. Prior to its use the crucible is subjected to a preparatory treatment consisting mainly of wetting the inner face by means ... | 10/02/1979 |
| 4169684 | Control device for a matrix printer A control device for a matrix printer. At the beginning of a line, a chaining unit is filled with a starting column address, a starting row address and a starting character address, the latter being to address a line buffer containing data of a line of ch... | 10/02/1979 |
| 4169256 | Digitally controlled oscillator A digitally controlled oscillator is provided with a memory, storing the half periods Ti (i=1, 2, ..., n) of corresponding frequencies fi =1/(2Ti) to be generated, and with a digital feedback circuit, in which circuit the ... | 09/25/1979 |
| 4168444 | Imaging devices An imaging device includes a semiconductor body and a array of photosensitive elements arranged in rows and columns at a first portion of the body. A plurality of charge-transfer lines interdigitated with the columns of the array are provided for transfer... | 09/18/1979 |
| 4167758 | Method and device for transmitting facsimile picture signals With the facsimile transmission of pictures the run-lengths (plurality of successive picture elements of the same luminance value) are often transmitted in coded form to save transmission time and transmission bandwidth respectively. Herein the shortest r... | 09/11/1979 |
| 4167731 | Integrating code converter Arrangement for converting a differential code into an absolute code which comprises a non-recursive interpolating digital filter, to which input code words are applied, with a sampling frequency fs, for supplying auxiliary code words occurring... | 09/11/1979 |
| 4167039 | Device for measuring the distribution of the absorption of the emission of radiation in a layer of a body In devices for reconstructing the adsorption distribution in a layer of a body on the basis of the measuring values obtained by means of a CT scanner, the measuring values (or values derived therefrom) are "spread" along strips which occupy the same posit... | 09/04/1979 |
| 4166379 | Apparatus for the detection of volatile organic substances An apparatus for detecting the presence of volatile, organic substances in gaseous mixtures comprises a filament on which the substances are absorbed when the filament is cold and released when hot, an electron capture device to detect the emitted substan... | 09/04/1979 |
| 4165507 | Non-linear digital to analog conversion by intermediate conversion to time interval A circuit network for the non-linear digital-to-analog conversion of a periodic pulse signal having a linear average value which depends on a digital value into a direct current signal, wherein said network has different charge and discharge time constant... | 08/21/1979 |
| 4165506 | Control unit for the brightness of video signals on a raster scan display A control unit for the brightness of video signals on a raster scan display is provided with a random-access memory. The data stored in each element of this memory determines the brightness of the video signals on the raster scan display at a position cor... | 08/21/1979 |
| 4165516 | Semiconductor device and method of manufacturing same A high voltage transistor having successively an emitter zone, a highly doped base part, a low doped base part, a low doped collector part and a highly-doped collector part. At a distance from the highly doped base part, a groove is provided which extends... | 08/21/1979 |
| 4164656 | Parallel safety coupling for X-ray table tilt drive A safety coupling for an X-ray table tilt drive. An auxiliary coupling means in parallel with the main mechanical drive coupling has a substantially constant amount of free play over the entire operational tilt range of the table so that it ordinarily car... | 08/14/1979 |
| 4163991 | Arrangement for examining objects An arrangement for detecting foreign objects in products. The products are X-rayed to produce a quantized raster scanned signal. The samples thus obtained for each line are combined with the bit samples of the next line, shifted by at least one position, ... | 08/07/1979 |
| 4163265 | Magnetic disc memory and magnetic disc for this memory A magnetic disc memory having a device for positioning a magnetic head on a track. A disc is sub-divided into sectors comprising groups of data tracks and, alternating therewith, sectors having groups of servo tracks which define the data tracks which are... | 07/31/1979 |
| 4162406 | X-ray apparatus comprising an intermittently displaceable film holder An X-ray apparatus comprising a film holder which is displaceable between a number of recording positions and a parking position and which can be locked in each of the recording positions by means of a latch co-operating in the parking position, with a ca... | 07/24/1979 |
| 4161741 | Semiconductor memory device The invention relates to a JFET memory in which the information at the gate electrodes of the JFET's is stored and read-out non-destructively. Each JFET has an IGFET structure situated entirely within the JFET and the gate of which is coupled to the sourc... | 07/17/1979 |
| 4161745 | Semiconductor device having non-metallic connection zones A semiconductor device includes a silicon substrate having an insulating layer with a window. A silicon layer is deposited on the insulating layer and on the silicon substrate surface in the window. This silicon layer has n-type and p-type conductive laye... | 07/17/1979 |
