| Patent Number |
Title Of Patent |
Date Issued |
| 4832432 |
Optical switching element between two optical guides and optical switching matrix constituted by |
May 23, 1989 |
| An optical switching element including two parallel optical guides G.sub.1 and G.sub.2 each constituted by a strip of a semiconductor material having a refractive index n.sub.1 formed on a semiconductor substrate having a lower refractive index n.sub.0, the switching operation being obta |
| 4831588 |
Integrated memory circuit having a differential read amplifier |
May 16, 1989 |
| A monolithic integrated memory includes a differential read amplifier circuit which is associated with a column of the memory and which has two source-coupled field effect transistors, the coupling point of which is controlled by a current source which itself is controlled by the output |
| 4831425 |
Integrated circuit having improved contact region |
May 16, 1989 |
| Method of manufacturing a semiconductor device and semiconductor device manufactured by the use of such a method.The invention describes a method of contacting narrow regions, such as narrow polysilicon gates of a CCD having a width of, for example, 4 .mu.m. Poly 2 and poly 3 layers, whi |
| 4830514 |
Temperature measuring arrangement |
May 16, 1989 |
| A temperature measuring arrangement employs a semiconductor element whose internal resistance depends on the temperature and the current direction and which is driven by an a.c. signal from an a.c. signal source. A measuring device determines the difference in semiconductor element c |
| 4830453 |
Device for optically coupling a radiation source to an optical transmission fiber |
May 16, 1989 |
| A device is described for optically coupling a radiation source unit to at least one optical monomode transmission fiber. The fiber core has a tapered end portion by which it can be connected to a known radiation source housing without very stringent requirements on the positional ac |
| 4829582 |
Electrodynamic transducer |
May 9, 1989 |
| An electrical transducer comprising a magnet system (1), a diaphragm (5) and a voice-coil device (3, 4), coupled to the diaphragm. The voice coil (3) is situated in an air gap (2) of the magnet system and the magnet system is coupled to a chassis (7). The chassis is provided with a c |
| 4829581 |
Electrodynamic transducer comprising a two-part diaphragm |
May 9, 1989 |
| An electrodynamic transducer (1) comprises a diaphragm with a central part (2) and a peripheral part (3) and a voice-coil device (9, 10) coupled to the central part (2). The diaphragm (2, 3) cooperates with an enclosed volume (6), the enclosed volume being such that ##EQU1## wher |
| 4829464 |
Arrangement for filtering a multiplexed video signal |
May 9, 1989 |
| Arrangement for cancelling spurious signals inherent to a multiplexed video signal, comprising an arrangement of random access memories ("1"), ("2"), and ("3") and adders (AD1, 2 and 3) and having for its object to obtain by a digital signal processing operation the average value (Y) of |
| 4829231 |
Current mirror having a high output voltage |
May 9, 1989 |
| A current mirror that comprises a first branch which includes the series arrangement of a diode (D.sub.1) and the main current path of a transistor (T.sub.1), and a second branch comprising the series arrangement of the main current path of a transistor (T.sub.2) and a diode (D.sub.2). I |
| 4829159 |
Method of optimizing control of plural switched electric loads to reduce switching transients |
May 9, 1989 |
| A method of controlling several clocked loads controllable individually and independently of each other, more particularly heating loads of an electric oven, for minimizing the demand on an alternating current mains due to switching transients. More particularly, the loads are energized |
| 4827613 |
Shaving apparatus |
May 9, 1989 |
| A shaving apparatus comprising a housing, a cutting plate and a cutting member which can be driven so as to be rotatable with respect to the cutting plate, said cutting member comprising a holder with cutting elements, said cutting elements comprising cutting sides at the radial ends |
| 4825455 |
Collimator for an X-ray mammography apparatus |
April 25, 1989 |
| The invention relates to a collimator for an X-ray mammography. A cone which is connected to the radiation source defines a radiation field which corresponds to the format of the image pickup. This radiation field is further restricted by a pivotable diaphragm plate arranged in the cone. |
| 4825443 |
Circuit arrangement for starting and operating a gas discharge laser |
April 25, 1989 |
| A circuit arrangement for starting and operating a gas discharge laser comprises two supply lines (4,5) adapted to supply a direct current to the gas discharge laser (1). A ballast resistor (7) is connected in at least one of the supply lines. By shunting the ballast resistor with means |
| 4824195 |
Monomode optical transmission fibre having a tapered end portion provided with a lens and method |
April 25, 1989 |
| A monomode optical transmission fibre (1) is described, having a tapered end portion (5) on which a lens (10) is arranged. This lens is obtained by immersing the fibre end in a transparent liquid material (7) whose melting temperature is lower than that of the fibre materials and whose r |
| 4823460 |
Method of manufacturing an electromagnetic deflection unit |
April 25, 1989 |
| A pair of saddle-shaped deflection coils are wound in a jig and are then assembled with other components. During winding the coil an electrically insulating support having electrically conductive connection points for the coil terminators is used, the terminators being connected to the |
| 4823337 |
Device for recording information on or reading information from an information disc |
April 18, 1989 |
| Clamping device (21) for clamping an optical disc on a turntable comprises a disc-pressure means (23), a support (5) for the disc-pressure means, which support is movable between an operating position and a rest position, and a permanent-magnet system comprising a first axially magne |
| 4823046 |
Color picture tube with astigmatism correction means |
April 18, 1989 |
| 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 symmetrically with respect to the plane |
| 4823013 |
Charged particles exposure apparatus having an optically deformable beam bounding diaphragm |
April 18, 1989 |
| In a beam shaper superpositions of a deformed first diaphragm and a deformed or non-deformed second diaphragm can be realized by means of a quadrupole system. As a result of this a great freedom for adapting the spot cross-section to the patterns to be formed is obtained, as a result |
| 4821166 |
Power-supply circuit |
April 11, 1989 |
| A power-supply circuit receives its power from an a.c. source (1) which, in specific time intervals is connected to a power-storage device (6) to feed power thereto. The power supply circuit includes a switch (10) which is periodically actuated by a control circuit (13) to take power fro |
| 4821036 |
Method of and apparatus for producing a digital indication of the time-integral of an electric c |
April 11, 1989 |
| A digital representation of the time-integral of the illumination-dependent electric current flowing in a photo-conductive diode (1) is produced by feeding the current initially to the first capacitor (3a) of a series of capacitors (3a-3d). When the voltage across this first capacitor re |
| 4820936 |
Integrated CMOS circuit comprising a substrate bias voltage generator |
April 11, 1989 |
| In CMOS integrated circuits, "latch-up" problems may arise if no special steps are taken. One way to counteract a "latch-up" state is to apply a substrate bias voltage. In an integrated circuit, an externally-clocked substrate bias voltage pump and a stand-by bias voltage generator are |
| 4817160 |
Amplifier with automatic gain control |
March 28, 1989 |
| An amplifier in which the gain (A.sub.i) is automatically controlled to a maximal value comprises means (D.sub.i) for detecting ringing tones and means (V.sub.i) for reducing the gain upon the detection of ringing tones. Also proposed is a circuit (D.sub.i) for detecting ringing tones. A |
| 4817097 |
Method of and device for pulse-mode driving a semi-conductor laser |
March 28, 1989 |
| A method of and a device for pulse-mode driving a semiconductor laser in which the semiconductor laser (60) is operated by first driving the laser into the LED region with a pedestal current pulse from a first current source (41) and by superposing thereon an information current pulse fr |
| 4817076 |
Electro-optical scanning device having bridge members through tracking coils |
March 28, 1989 |
| The invention relates to an electro-optical device, comprising a frame (1), a movable holder (5) in which an objective (7) having an optical axis (9) is secured, bearing pin (25) fixed to the holder (5) and bearings (27, 29) fixed relative to the frame (1) supporting the holder so that i |
| 4816927 |
Magnetic-tape apparatus, having means for optimizing tape speed |
March 28, 1989 |
| Rotatable head support (6) carries at least one magnetic head (7) which scans the tracks of a magnetic tape (1) guided across an arcuate guide surface (5) over an angle smaller than 180.degree.. The angle of inclination (.alpha.) of a head relative to a reference plane (100) is adjus |
| 4816821 |
Clocked direct voltage converter |
March 28, 1989 |
| A clocked direct voltage converter has a controlled output at which a controlled voltage is produced. The converter also produces an uncontrolled voltage at an uncontrolled output. The latter voltage, is obtained by coupling to one of the energy storage elements in the converter. In |
| 4816779 |
Amplitude stabilized oscillator having positive and negative feedback |
March 28, 1989 |
| An oscillator circuit which includes a differential amplifier in combination with a negative feedback network and a positive feedback network connected to the amplifier. One of these networks determines the frequency of the generated oscillation. In order to obtain an oscillation of |
| 4816721 |
Circuit arrangement for operating a high-pressure gas discharge lamp |
March 28, 1989 |
| A circuit arrangement for operating a high-pressure gas discharge lamp (3) with a pulsatory direct current produced from an alternating voltage supply (A, B) via a full-wave rectifier (1). The output of the full-wave rectifier is shunted by a series arrangement of a diode (4) and a c |
| 4816718 |
Segmented photomultiplier tube |
March 28, 1989 |
| Photomultiplier tube 10 segmented into a plurality of elementary photomultipliers 11 comprising a photocathode 12 and a multiplier 13 of the type using sheets partitioned into a plurality of elementary multipliers 14. According to the invention the input space of the tube 10 located |
| 4816051 |
Method of manufacturing glass bodies by means of extrusion |
March 28, 1989 |
| A method of manufacturing glass bodies, in which the starting material for the glass body, being an extrusion mass consisting of microdispersed SiO.sub.2 particles, a binder and a dispersing liquid, is used to form a porous green body by extrusion, which is subsequently dried, purified a |
| 4815558 |
Device for accomodating a loudspeaker into a cut-out of a sound panel |
March 28, 1989 |
| A device for fitting a loudspeaker (17) into a cut-out of a sound panel, in particular into cut-outs of the most varied types of sound panel of motor vehicles. The loudspeaker can be fitted by its frame border (15) in each case into a mount adapted to the cut-out and which mount has a so |
| 4815199 |
Method of manufacutring a thermal imaging device with thermally insulated sensor elements |
March 28, 1989 |
| A thermal imaging device is manufactured by providing electrodes on opposite sides of a slab of ferroelectric or pyroelectric material. A sheet of electrically and thermally insulating material is bonded to the signal electrode layer on one side of the slab. An electrically conductive |
| 4815026 |
Slave-type interface circuit |
March 21, 1989 |
| A slave-type interface circuit which can receive signals from a bus if the coding A.sub.0, A.sub.1 and A.sub.2 of its inputs S.sub.0, S.sub.1 and S.sub.2 corresponds to that mode of operation. The signals from the bus are then delivered to the inputs L.sub.1 and L.sub.2. With another mod |
| 4813755 |
Optical fiber connection to an optical IC |
March 21, 1989 |
| To avoid production-technical and optical problems when connecting optical waveguides to conductor paths leading to the edge of the IC, the connection point is removed from the edge into the lateral face of the optical IC. In that region an optical conductor which extends in the inte |
| 4813074 |
Method of and device for segmenting an electric signal derived from an acoustic signal |
March 14, 1989 |
| A method and device for segmenting an electric (acoustic) signal. A number of parameters, for example "log area" parameters, are derived as a function of time from the electric signal (block 2). For consecutive instants the signals of the parameters located within a time interval aro |
| 4813031 |
Apparatus for reproducing information from an optically readable record carrier |
March 14, 1989 |
| An apparatus is described for reading an optically readable record carrier, in which apparatus various control signals are derived from signals obtained by sampling the signals supplied by two optical-detector halves with the bit frequency both during the intermediate areas and the pits, |
| 4812762 |
Fast method and device for determining an NMR distribution in a region of a body |
March 14, 1989 |
| The invention relates to a method of making NMR images (density distributions, location-dependent spectroscopy) utilizing two alternating gradient fields whose gradient directions are mutually perpendicular. Thus, a two-dimensional "plane" in the 3-D image frequency space can be fill |
| 4812753 |
Method and arrangement for determining a corrected MRI surface coil image |
March 14, 1989 |
| In MRI (Magnetic Resonance Imaging), the signal-to-noise ratio with nuclear magnetic resonance signals received by a surface coil from an excited body is considerably larger than with corresponding signals received by a body coil in the relevant region. The sensitivity pattern of a surfa |
| 4812736 |
Circuit arrangement for operating high-pressure gas discharge lamps |
March 14, 1989 |
| A circuit for operating high-pressure gas discharge lamps comprises a full-wave rectifier (2) which is connected to an alternating voltage supply source and supplies an output direct voltage to a combinatorial circuit part comprising a switching transistor (3), a choke coil (4), a fl |
| 4812734 |
Current-mirror arrangement |
March 14, 1989 |
| A current-mirror arrangement comprising a first branch including two series-connected diodes and a second branch including the series-connected base-emitter paths of two transistors. The ratio between the input and output currents of the current mirror is proportional to the root of the |
| 4812704 |
Color television display tube |
March 14, 1989 |
| A color selection electrode (29) for a color television display tube is suspended in the corners of the display window (20) with the aid of suspension means which comprise a flat resilient element (27). The resilient element (27) comprises an embossment (28). The embossment (28) fall |
| 4812691 |
Device for improving the stability of rotation of the rotor of a single-phase synchronous motor |
March 14, 1989 |
| The invention relates to a device for improving the stability of rotation of the rotor of a single-phase synchronous motor mounted in an apparatus housing. The motor exhibits an average motor torque on which strong alternating torques are superimposed and which drives a preferably ro |
| 4811484 |
Dry-shaving apparatus |
March 14, 1989 |
| A dry-shaving apparatus comprises a housing; a longitudinally extending shear plate; a holder for the shear plate, the holder being removable from the housing; and a longitudinally extending cutter rotatable relative to the shear plate. The cutter includes a carrier having cutting elemen |
| 4811483 |
Dry-shaving apparatus with self adjusting blades |
March 14, 1989 |
| A dry-shaving apparatus comprises a longitudinally extending shear plate provided with hair-entry apertures; and an associated longitudinally extending cutter rotatable about an axis of rotation, such cutter including a spindle coaxially positioned with respect to the axis of rotatio |
| 4811391 |
Telephone set comprising a line voltage stabilizer having a DC supply point |
March 7, 1989 |
| A telephone set comprising an active line voltage stabilizer circuit having two output terminals 10-1 and 10-2 between which it produces a stabilized direct voltage which is independent of the line current. A series arrangement of a capacitor (14) and a resistor (16) is connected between |
| 4811334 |
Method of operation of a nodal telephone and data communication network to provide specific faci |
March 7, 1989 |
| A method of operation of a telephone and data PABX communication network which comprises a set of nodes interlinked by means of TDM-transmission lines. Each node serves an individual switching exchange and comprises its own control module. To a user the network is manifested as a single |
| 4811010 |
Monitor system for traffic-lights |
March 7, 1989 |
| A monitor circuit arrangement for traffic lights wherein energy is supplied from an alternating voltage supply source(s) to a lamp (L 1) via a controlled switch (SD 1) and energization of the unit is monitored by a voltage comparator connected in cascade with a sensing latch (SL 1). The |
| 4810993 |
Adjustable electromechanical component |
March 7, 1989 |
| An electromechanical component, in particular a rotary potentiometer having an integrated center click or optionally more fixed intermediate positions. The fixed intermediate position is obtained by a combination of two teeth and a lug. The two teeth are integrated with the element of th |
| 4810968 |
Magnetic resonance imaging apparatus comprising a pin diode uncoupled detection coil |
March 7, 1989 |
| In a magnetic resonance imaging apparatus comprising a surface coil, the circuit in which the surface coil is included is interrupted by means of a PIN diode in the non-active state of the coil. In addition to the PIN diode in the resonant circuit of the surface coil, PIN diodes are incl |
| 4810059 |
Display device with three-level drive |
March 7, 1989 |
| A three-level drive for a display device is obtained by choosing two levels for the "non-selection" voltages of a display device driven by a diode matrix. This three-level drive reduces the cut-off voltage across the diodes in the diode matrix, which provides a wider choice of diodes. |
