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| Number | Title | Issue Date |
| 4959246 | Screen printing process and apparatus and electrical printed circuits obtained therewith A process for providing through plated holes in a substrate by screen printing provides uniformly thick plating of the holes. One side of the substrate is screen plated while being subjected to an underpressure between 10 and 200 gr/cm2 from a ... | 09/25/1990 |
| 4793474 | Controlled delivery agricultural capsule and method of making A capsule for the controlled release of an active material, e.g. into soil, is described. The capsule comprises an insoluble tubular housing (11) containing a number of water soluble or biodegradable partition walls (13) defining one or more hermetically ... | 12/27/1988 |
| 4781276 | Hydraulically actuated wheel brake with a built-in pressure control device A hydraulically actuated wheel brake with a built-in control device comprising a brake piston including two pressure surfaces each of which defines a different one of two working chambers. The pressure fluid inlet is connected directly to one of the two w... | 11/01/1988 |
| 4730192 | Monitor for an electronic TACAN beacon A monitor for an electronic TACAN (ELTA) includes a 16-way switch whereby samples of the r.f. signal fed to each TACAN antenna element are fed via a common lead 30 to (a) means for r.f. phase correlating the samples with the transmitter generated signals,... | 03/08/1988 |
| 4715486 | Low-wear frictionally engaging device A frictionally engaging device, such as a disc brake, includes a first and a second friction element which engage one another as the device is operated to reduce the extent of and/or eliminate relative movement between these elements. The first element co... | 12/29/1987 |
| 4702599 | Rotation rate measuring instrument In the rotation rate measuring instrument, two light beams traverse a coiled optical fiber (1) in opposite directions. The two beams emerging from the optical fiber are combined, and the rotation rate is determined from the Sagnac phase difference between... | 10/27/1987 |
| 4699451 | Optical fiber coil having juxtaposed ends in same or adjacent layers for rotation rate measuring instrument An optical fiber is coiled in an instrument in such a way that its beginning and its end belong to the same layer or to adjacent layers and are close together.... | 10/13/1987 |
| 4698637 | Device for pulse modulation automatic control A device for pulse modulation automatic control, where the modulation is a combined plurality of pulse components. Each pulse component is singly controlled by a respective control voltage or current, the control voltages and/or currents being fully indep... | 10/06/1987 |
| 4691117 | Switch device A contactless electrical switch includes a switch element comprising a piezo-resistive transducer (25). Coded toothed cams (16) operated via a shaft (14) deflect the transducer (25) causing corresponding changes in stress and hence resistance. The output ... | 09/01/1987 |
| 4679251 | Optical receiver In an optical receiver for the reception of a modulated light beam, the beam falls on a PIN diode connected to the input of an amplifier which has a feedback resistor across it. This resistor is shunted by the series combination of a Schottky diode and of... | 07/07/1987 |
| 4677441 | Two-way ranging system A two-way ranging system in which deviations of transmit times of interrogation signals from a nominal transit time are determined at a transponder. These deviations are dependent upon the propagation conditions for interrogation and reply signals in the ... | 06/30/1987 |
| 4675987 | Method of sealing a relay A relay is sealed with a sealing compound when the relay housing is in a closed state, thus causing an air cushion to be formed in the inside, with an afterflow of sealing compound into the interior being prevented. Following gelling or curing of the seal... | 06/30/1987 |
| 4671905 | Method of a forming a secondary coating on an optical fiber A stable secondary coating, for example of nylon, is applied to a primary coated optical fiber by a process including high-speed (ࣙ100 meters per minute) extrusion of the secondary coating material, cooling of the extruded material by quenching in cold ... | 06/09/1987 |
| 4672387 | Antenna systems for omnidirectional pattern An antenna system which has omnidirectional coverage in azimuth and sectoral coverage in elevation. A main reflector including a reflecting surface has polar symmetry about the Z-axis. It also has a cross section in any plane containing the Z-axis which s... | 06/09/1987 |
| 4672216 | Liquid quality monitor having a plurality of photodiodes for detecting light scattered at various angles A power station boiler condensate water monitor employs a light-scatter cell for the detection of oil and/or particulates in the water. In order to determine background scatter levels, provision is made to alternatively pass clean water through the cell (... | 06/09/1987 |
| 4668914 | Circular, amorphous metal, Hall effect magnetic field sensor with circumferentially spaced electrodes A magnetic field sensor is disclosed with which the direction of a magnetic field can be determined by using the planar Hall effect. An active layer of the sensor is made of a ferromagnetic amorphous metal which is magnetically isotropic. Thus, the magnet... | 05/26/1987 |
| 4665347 | Circuit for producing the operating voltages and the horizontal-deflection current for picture-reproducing equipment In picture-reproducing equipment with higher scanning frequencies (e.g., flicker-free television, visual display unit), the generation of the horizontal-deflection current is separated in frequency from the generation of the operating voltages by supplyin... | 05/12/1987 |
| 4662818 | Tangential blower In a tangential blower having side walls near the air outlet provided with lugs projecting into the high pressure chamber.... | 05/05/1987 |
| 4662704 | Coaxial cable connection to a terminal strip A connecting arrangement comprises a crimp barrel which is crimped against the outer conductor of a coaxial cable and contains a shield wire to be connected to a wrap post of a terminal strip, and a holding device which engages the cable over the edge of ... | 05/05/1987 |
| 4661136 | Process of fabricating an elongated glass body particularly a preform for optical waveguides For fabricating porous bodies from a glass starting material, particularly in connection with the fabrication of an optical waveguide preform, it is proposed to fill powdery glass starting material under a pre-compaction into a compression mold, and to co... | 04/28/1987 |
| 4660418 | Flexible hinge device A flexible hinge device comprises a laminar silicon body having a groove portion etched away to define a thin flexible strip joining two rigid end portions. The silicon forming the hinge is usually of a single crystal structure. Break-off supports may be ... | 04/28/1987 |
| 4660972 | Arrangement for visualizing the cores of optical waveguides The spatial position of the core of an optical waveguide (1) can be observed exactly in that the optical waveguide is irradiated, in two mutually perpendicular directions, with parallel light, which thereafter passes through each time one rod lens (31, 32... | 04/28/1987 |
| 4659378 | Solderable adhesive layer Electrical contacts to or mechanical connections between components and provided by using a thin layer of an alloy consisting of metals and metalloids. Such a layer shows excellent adhesion to glass or semiconductor substrates.... | 04/21/1987 |
| 4655091 | Rotational movement A transducer responsive to rotational movement comprises a support member on which a shaft is rotatably mounted. Relative movement between the member and the shaft is sensed by flexure of a strip of a piezo-resistive mateial. Typically, the strip is facri... | 04/07/1987 |
| 4655550 | Ferro-electric liquid crystal display with steady state voltage on front electrode A ferro-electric liquid crystal display in which the individual pixels are addressed via an address matrix that includes one field effect transistor for each pixel, and a plurality of row and column conductors whereby data is written into each pixel to ch... | 04/07/1987 |
| 4653851 | Fire resistant fiber optic cable A fiber optic cable includes layers and elements for mechanical and fire protection of the cable, all having the same or substantially the same thermal coefficient of expansion as the optical fibers. The fiber optic cable core is protected against flames ... | 03/31/1987 |
| 4654810 | Facility for determining delay variations The time required for several calibration signals to traverse a signal path (1, 2, 3) is determined and compared with a nominal value. The individual calibration signals have different values for at least one signal parameter. Depending on the results of ... | 03/31/1987 |
| 4654866 | Combined narrow band and broad band telephone communication system An integrated communication system (e.g., BIGFON) includes the narrow-band telephone network and a superposed video-telephone network. The path search for setting up calls in the telephone network is carried out with the aid of the telephone call numbers.... | 03/31/1987 |
| 4653844 | Prism couplers Prism couplers are manufactured by disposing a prism (10) on an optically flat waveguide (11) such that the region therebetween is shaped for substantially optimum coupling of optical energy therebetween, and securing the prism to the waveguide without de... | 03/31/1987 |
| 4653086 | Communication terminal for processing voice and graphical information A communication terminal for processing voice and graphical information having a telephone set including a handset supported by a housing with an input device mounted within the housing for establishing communication with a distant terminal. The input dev... | 03/24/1987 |
| 4652097 | Glass article having renewable optical surfaces A transparent glass article, e.g., for use as an inspection window in contact with water, including at least a surface layer of a glass which is adapted to dissolve at a preselected uniform rate. Slow dissolution of the glass provides a continuously renew... | 03/24/1987 |
| 4649755 | Sensor for magnetizable materials A sensor for magnetizable materials is comprised of an inductive component and an evaluating circuit. The inductive component is constructed by thin-film techniques. The core is made of a ferromagnetic amorphous metal. Such a sensor can detect the presenc... | 03/17/1987 |
| 4648110 | Circuit arrangement for a voice-controlled hands-free telephone facility A voice-controlled hands-free facility contains a microphone, an internal and an external loudspeaker, and two series combinations of an input amplifier (EV), a variable attenuator (DR), and an output amplifier (AV), one for the send path and one for the ... | 03/03/1987 |
| 4647203 | Fiber optic sensor An optical fibre Fabry-Perot etalon can be used as a sensor if the parameter being monitored is allowed to influence the etalon's length, e.g. by pressure, temperature, magneto-strictive effects, piezo-electric effects, acoustically, etc. However, with si... | 03/03/1987 |
| 4647151 | Optical communication cable The cable core containing one or more optical waveguides is protected from longitudinal and transverse forces by being loosely disposed within a sheathing. The sheathing consists of a tubing which is divided into two sections in the longitudinal direction... | 03/03/1987 |
| 4647762 | Optical receiver An optical receiver of the so-called high impedance type has a photo-diode onto which the modulated light beam from an optical fiber, or received via free space, falls to produce a current in that diode. One end of the diode is coupled directly to the gat... | 03/03/1987 |
| 4646344 | Mobile radio set The mobile radio set has a rectangular parallelepiped-shaped case suitable for mounting in the dashboard of an automobile. The handset can be locked at its earpiece and mouthpiece into a cradle mounted on the front panel of the case so that the handset ca... | 02/24/1987 |
| 4646091 | Airborne set for a two-way distance-ranging system In the standard DME system, an airborne station having transmitted a pair of interrogation pulses receives a plurality of pairs of space-coded reply pulses from which the pulse pairs intended for the airborne station are selected by a decoder (DK) and a c... | 02/24/1987 |
| 4644579 | Shunt regulator for hands-free telephone In a loudspeaking telephone the power supply to the loudspeaker amplifier is shunted by a regulator which functions as a programmable Zener diode. Under conditions of low available line current, e.g. where two similar instruments are operated in parallel ... | 02/17/1987 |
| 4644315 | Push-button switch In a push-button switch, the switch element is a cantilever (2) of thin silicon strain gauge material with a small magnet (1), e.g. of samarium cobalt alloy at its free end. Adjacent to the free end there is an annular magnet (3), e.g. of plastics materia... | 02/17/1987 |
