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| Number | Title | Issue Date |
| 6098189 | Relay station for wireless communication traffic A relay station utilizes the frequency hopping principle for the purpose of protection against intentional interference. Normally, the frequency hopping range available cannot be utilized for the frequency hopping operation because an indispensable minimu... | 08/01/2000 |
| 5303077 | Optical switch and switching module therefor A switching device for being connected to switch optical input signals received on a plurality of optical input signal lines into optical output signals on a plurality of optical output signal lines; each device has a time slot interchanger or a wavelengt... | 04/12/1994 |
| 5170168 | Identification of friend from foe device An identification of friend from foe (IFF) device is described containing a radio transceiver (F) which, in addition to being designed for communication purposes, is equipped for transmitting, receiving, and evaluating IFF signals. The IFF device further ... | 12/08/1992 |
| 5058156 | Network interface and communication terminal According to the invention, for connections between terminals connected to different networks, the terminals intended for connection to the network having the higher capacity are so equipped that, alternatively (I, II), they could also operate at the netw... | 10/15/1991 |
| 5045849 | Access device for an ISDN connecting device of a public terminal An access device at a public communications terminal enables an authorized user to gain access, via a connecting device, to an integrated services digital communications network. The access device includes a connecting device (2) behind a protective membe... | 09/03/1991 |
| 5043641 | Circuit for and method of controlling 4-phase brushless DC motors A control circuit bipolarly controls the stator of a 4-phase brushless DC motor in which the staor windings are connected in a ring circuit with only four semiconductor switches. Also, two control sequences are possible: a first control sequence consistin... | 08/27/1991 |
| 5016257 | Receiver for bandspread signals, particularly GPS receiver Receivers for bandspread signals have a carrier PLL (20) for the carrier frequency and phase and a code PLL (20, 30 . . . 34) for the code frequency and phase. To be able to receive even very noisy signals, the carrier PLL, in particular, must have a very... | 05/14/1991 |
| 4973825 | Circulation fan for baking ovens A circulation fan for circulating air in the baking muffle of an oven in which a conductive connection is made between the drive shaft and the back wall of the baking muffle whereby the RF energy passing outward over the surface of the drive shaft is shor... | 11/27/1990 |
| 4939747 | Digital communication system with addressable repeaters and devices for fault isolation For a digital communication system comprising a plurality of repeaters between two terminals from one of which the repeaters are to be selectively controllable for fault-location or remote-control purposes, repeaters are disclosed each of which has its ad... | 07/03/1990 |
| 4918271 | Pushbutton type keyboard switch A low-profile keyboard switch having an improved guide structure for guiding the vertical motion of the keys. Each key assembly comprises a guide member and a key including a keypad, a downwardly projecting central plunger and a downwardly projecting leg ... | 04/17/1990 |
| 4837456 | Pulse generator A pulse generator having a plunger for actuating several contacts. The plunger is guided in a housing and is slidable in the direction of and rotatable about its longitudinal axis against the action of a spring and is provided with at least one actuating ... | 06/06/1989 |
| 4827277 | Antenna with a main reflector and a subreflector The antenna has a main reflector (1), a subreflector (4a, 4b, 5a, 5b), and a feed radiator (2) which are all rotationally symmetric about a common axis (10). In a section in the direction of this axis of symmetry (10), the subreflector has the shape of tw... | 05/02/1989 |
| 4805986 | Method of producing polarization-maintaining single-mode optical waveguides and preforms used therein A method of producing polarization-maintaining single-mode optical waveguides is provided wherein the preform from which the optical waveguide is produced consists of a tube, a rod of core and cladding material centrally disposed in said tube, and two dif... | 02/21/1989 |
| 4801814 | Pulse generator A pulse generator is disclosed comprising a toothed disk which is rotatable with a rotary shaft and is capable of actuating at least two contact pairs for generating pulses and for sensing the direction of rotation of the rotary shaft via a rocker engagin... | 01/31/1989 |
| 4794306 | Flat picture-reproducing device In a flat picture-reproducing device having a phosphor-coated faceplate (1) and a tray-shaped rear housing (2), a cathode formed by a periodic array of heating wires (7) is provided. This heating-wire array is followed by layers of focusing wires (8) and ... | 12/27/1988 |
| 4792498 | Picture-reproducing device In a vacuum-tight picture-reproducing device having a flat glass faceplate and a metal tray-shaped back case with an outwardly curved bottom and a continuous flange, the flange has a perpendicular extension. The faceplate has end surfaces embraced by the ... | 12/20/1988 |
| 4786268 | Liquid-crystal display manufacturing method The introduction of liquid-crystal material into a liquid-crystal cell is simplified by cooling the liquid-crystal material until it has a paste-like viscosity suitable for printing. After a spacer has been positioned on a first substrate, the liquid-crys... | 11/22/1988 |
| 4782243 | Pulse generator A pulse generator with a pin-shaped switching plunger for actuating at least one contact is so designed that many switching positions are possible. It is characterized in that the switching plunger (3), which is guided in a housing, is slidable in the dir... | 11/01/1988 |
| 4779788 | Hermetically sealed glass fiber bushing To avoid having to metallize a bare glass fiber prior to soldering it into a hole of a metal part to obtain a hermetically sealed lead-through bushing, the solder is permitted to shrink onto the glass fiber. This is achieved by either soldering an additio... | 10/25/1988 |
| 4776271 | Silk-screen printing method using predistorted second screen During silk-screen printing, the stencil (3) is stretched as a result of the pressure exerted by the squeeges (6) This results in a distorted pattern on the material (4) to be printed. To eliminate this error, the design (7') in the stencil (3) is predist... | 10/11/1988 |
| 4771220 | Picture tube heater supply circuit In a television receiver with a drive transformer for the horizontal output stage, the heater voltage for the picture tube is inductively obtained from the drive transformer.... | 09/13/1988 |
| 4764772 | Scanning-beam microwave landing system In the basic configuration of the microwave landing system, an azimuth station (2) and an elevation station (1) are interconnected by a data link for transferring data and sync signals, and each of the stations includes a monitoring facility (10, 15; 3, 8... | 08/16/1988 |
| 4762988 | Circuit arrangement for stabilizing an optical resonator A circuit arrangement including a controllable optical resonator having a filter characteristic with a transmission peak arranged to pass laser radiation at a wavelength in the region of the transmission peak, wherein the resonator is positioned to receiv... | 08/09/1988 |
| 4761115 | Axial-flow fan A frame-supported fan in which the mounting portions between the motor and the frame are formed in the shape of an arrowhead and/or are provided with sculptured edges extending to the frame or are provided with interfering bodies mounted to the outer ends... | 08/02/1988 |
| 4761795 | Receiver for bandspread signals An improved receiver for modulated bandspread carrier signals is disclosed. The invention includes an antenna for intercepting a plurality of modulated carrier signals bandspread at a first clock rate; a radio frequency section in communication with the a... | 08/02/1988 |
| 4742325 | Thin-film circuit and method of making the same A thin-film circuit including integrated resistors and conductors. The conductors consist of two superposed Au layers having a Pd layer sandwiched between them. The conductors have a sheet resistivity of R 10 m and are solderable and bondable. The thin-fi... | 05/03/1988 |
| 4730142 | Color picture tube The shadow mask of a color picture tube is connected to studs in the faceplate via hold members. To secure the hold members in position, screw or pressfit fasteners are inserted into the free ends of the studs. The heads of the fasteners force the hold me... | 03/08/1988 |
| 4726965 | Metallizing transparent conductive paths To metallize transparent conductive paths of indium tin oxide (ITO) on substrates of display devices, a solderable metal layer is applied by electroless deposition. If the metal layer is adjacent a liquid crystal display device, the display device may be ... | 02/23/1988 |
| 4726010 | Optical communication system in the subscriber loop The invention relates to an optical communication system for transmitting subscriber-assigned information in both directions between a center (1) and a plurality of subscribers (3ato 3n), particularly to the subscriber loop of a broadband communication sy... | 02/16/1988 |
| 4720657 | Implosion protection for shallow image display device having front screen with rearwardly projecting walls A shallow electronic image display device having a trough-shaped display screen of glass with a slightly convex exterior surface and a planar phosphor coated interior surface with a peripheral side wall terminating in an edge defining a common plane in se... | 01/19/1988 |
| 4719469 | Direction-determining system A direction determining system having a Global Positioning System (GPS) receiver, a linear antenna array and a fast switching facility, the linear antenna array comprised of at least two antenna elements and the GPS receiver including two Costas Loops. Th... | 01/12/1988 |
| 4712976 | Tangential blower In a tangential blower, the vortex former is provided on the suction (intake) side with a sharp-edged interfering body at least extending over one-half of its length. The interfering body reduces siren like noise which would otherwise be produced.... | 12/15/1987 |
| 4708678 | Adjustment apparatus for video display device and method therefor An apparatus for the assembly and alignment of a video display device having a base plate and a holding device, the base plate including a plurality of movable adjusting studs projecting therefrom for engaging a plurality of alignment holes located in a p... | 11/24/1987 |
| 4709272 | Implosion protection for video reproducing device A video reproducing device having a flat screen loosely placed in a mounting frame. The flat screen supports an elastic safety sheet affixed thereto for providing implosion protection if the flat screen shatters. A space is created between the frame and t... | 11/24/1987 |
| 4704031 | Rotation rate measuring device A rotation rate measuring device is disclosed in which two beam portions travel around an optical-fiber coil (6) in opposite directions, and in which the Sagnac phase difference between the two beam portions after passage through the optical-fiber coil is... | 11/03/1987 |
| 4702559 | Liquid-crystal display made from continuous plastic film split and folded through 90 degrees To simplify the liquid-crystal display film fabrication process, a single film strip is used which is divided into two films prior to the positioning of spacing means. After the spacing means have been positioned on the second film, the first film is fold... | 10/27/1987 |
| 4701012 | Optical multiplexer/demultiplexer The multiplexer/demultiplexer consists of a plurality of elements (105, 106, 107, 108) made of optically transparent material which are cemented together and on which filter layers (101, 102, 103, 104) are deposited so as to form wavelength-selective beam... | 10/20/1987 |
| 4695477 | Method of producing a plane phosphor screen In coating a smooth glass faceplate panel with phosphor to produce a phosphor screen for use with flat color picture tubes, a basic mask is placed onto the glass faceplate panel. Thereafter; one at a time, one coating mask for each respective color is pla... | 09/22/1987 |
| 4688089 | Circuit arrangement for detecting motion in a television picture To detect horizontally moving portions of a TV frame formed from two adjacent fields, the vertical local frequency at a vertical edge of the moving portion of the picture is measured with a narrow-band-pass filter circuit which is tuned to the local frequ... | 08/18/1987 |
| 4686671 | Cellular communication system operable with transmission pathfault A communication system with fixed stations (FS), mobile stations (MS), and control stations (LS) is disclosed in which the control stations are interconnected by transmission paths and have additional, closed transmission paths connected to them. In the t... | 08/11/1987 |
