Patents Assigned to SAT
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Patent number: 5151815Abstract: The present invention relates to scanning devices, for example those used in image scanning, observation and watching systems or else those used for example in aerial reconnaissance. The invention consists essentially in causing the mirror M to rotate about an axis distinct from the perpendicular to the plane of the rotating beam. In particular, this axis of rotation is set to an angle with respect to the perpendicular to the plane of the rotating beam, this angle being itself a function of the angle of incidence of the light beam.Type: GrantFiled: December 26, 1990Date of Patent: September 29, 1992Assignee: SAT (Societe Anonyme de Telecommunications)Inventor: Gerard Baillet
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Patent number: 5118282Abstract: In this process for the selective noncatalytic reduction of the emission of pollutants from oil-fired boiler plants, chemical compounds which affect the combustion process are admixed, in solutions miscible with the liquid fuel, in metered amounts to the liquid fuel or to the combustion air, among these compounds being salts of organic acids, such as naphthenates, octoates, tallates, salts of sulfonic acids, saturated or unsaturated fatty acids, such as oleic acid, and tall oil, with metals from the group of K, Ba, Mg, Ca, Ce, Mn, Fe; rare earth metals; organometallic compounds, such as carbonyl compounds, mixed cyclopentadienylcarbonyl compounds, or aromatic complexes of the transition metals Fe or Mn. For the purpose of minimizing the NO.sub.Type: GrantFiled: September 17, 1990Date of Patent: June 2, 1992Assignee: SAT Chemie GmbHInventors: Thomas Reynolds, Jan-Dirk Meurer
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Patent number: 5041890Abstract: A wafer is provided for pre-processing the output currents of detection diodes subjected to thermal radiation, comprising an input stage for integrating the output currents of the diodes and an output stage delivering a signal related the incident radiation by a transfer function. It also comprises transistors for compressing the transfer function, the transistors conducting beyond a shunt threshold current less than a clipping threshold current and having a conduction resistance such as to shunt only a part of the integrated charges.Type: GrantFiled: October 25, 1989Date of Patent: August 20, 1991Assignee: SAT (Societe Anonyme de Telecommunications)Inventor: Henri G. Pruvot
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Patent number: 5035506Abstract: A coherent optical detector has increased sensitivity for detecting a coherent optical signal by applying the coherent optical signal to be detected to a solid non linear medium pumped by two optical signals of opposite directions and coming from an auxiliary laser. The signal to be detected gives rise to an amplified signal applied with an auxiliary optical signal from the auxiliary laser, to a detector for causing these two optical signals to beat and detecting the beat and so the signal to be detected.Type: GrantFiled: November 9, 1989Date of Patent: July 30, 1991Assignee: SAT (Societe Anonyme de Telecommunications)Inventor: Michel M. Ouhayoun
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Patent number: 5029232Abstract: A satellite communication network includes an encoder for encoding a signal including message, addressing, and command information and a transmitter connected with the encoder for transmitter the encoded signal to a satellite. The message information may comprise video and/or audio information. A plurality of receivers located at a remote location from the transmitter are operable to receive selected portions of the encoded signal from the satellite in response to the addressing information contained in the encoded signal. A decoder is connected with each receiver for decoding the received portion of the encoded signal. The decoder includes a control device which is operable to control peripheral recording devices including one or more video tape recorders and a printer to record the video information from the decoded signal in response to command information contained in the encoded signal.Type: GrantFiled: January 12, 1989Date of Patent: July 2, 1991Assignee: Cycle-Sat., Inc.Inventor: David C. Nall
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Patent number: 5014270Abstract: A synchronizing device synchronizes a pseudo-binary signal particularly affected by high jitter with a regenerated clock signal into a synchronized signal. The device can be included between an output of a bipolar-to-binary converter receiving a plesiochronous bipolar signal and an input of a HDB/binary transcoder in a synchronizing circuit of a time-division multiplexer. The clock signal has a period Tj substantially lower than the nominal period of the pseudo-binary signal and offers phase jumps, particularly included between Tj/2 and Tj, for the clock signal to have a mean period equal to the nominal period.Type: GrantFiled: April 26, 1990Date of Patent: May 7, 1991Assignee: SAT (Societe Anonyme de Telecommunications)Inventor: E. Thierry Sillere
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Patent number: 5008543Abstract: A system is disclosed for determining the position of at least one target by triangulation, comprising two passive sighting devices which measure the intensity of radiation received along a sighting line which scans a vertical sighting plane. They are disposed at a distance from each other along the same vertical axis and are driven in rotation about this common axis so that their sighting planes merge. A circuit extracts the angular coordinates of the target, relative to each of the sighting devices, and computes the distance of the target by triangulation in the vertical sighting plane.Type: GrantFiled: January 17, 1990Date of Patent: April 16, 1991Assignee: Sat(Societe Anonyme de TelecommunicationsInventors: Michel P. Bertrand, Michel B. Bucher, Andre R. Delclaux
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Patent number: 4999502Abstract: A device is divulged for generating an infrared image, in which an electron beam having a section substantially equal to the area of a pixel formed from a material having high emissive power in the infrared, directly bombards this material. The energy of the beam is transformed into heat then into infrared radiation, in the material. Each pixel is supported by a slab of a material transparent to the infrared, which is heat insulating and deposited on a screen transparent to the infrared and heat conducting.Type: GrantFiled: September 28, 1989Date of Patent: March 12, 1991Assignee: SAT (Societe Anonyme de Telecommunications)Inventor: Thierry Midavaine
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Patent number: 4795230Abstract: In order to spread optical fibers emerging from an end of cable and to firmly attach the cable end with ends of protective jackets in which the spread fibers are strung, the following steps are performed by means a spreading device including mainly a grooved hollow distributor. The distributor is fastened to a sawn off end of a grooved elongated ring in the cable by pinching a central armature emerging from the cable, by jaws housed in the distributor. A split ring is strung around a grooved revolution portion of the distributor. For each fiber, a longitudinal slot of the split ring and a respective groove of the revolution portion are superposed, the end of the jacket of the fiber is entered into the groove through the slot, and the jacket is forced into the groove by partially rotating the split ring so as to superpose the slot and another distributor groove.Type: GrantFiled: April 14, 1987Date of Patent: January 3, 1989Assignees: SAT (Societe Anonyme De Telecommunications, SILEC (Societe Industrielle De Liaisons Electriques)Inventors: Marcel Garcia, Didier Suillerot
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Patent number: 4774703Abstract: A switching system is provided for application to a multichannel digital transmission network. It allows a defective channel to be replaced by an emergency channel without the user of the channel being aware of the replacement. On the emission side as well as on the reception side, switching and processing take place of bipolar signals, for example a High Density Bipolar 3 code, which allows the path doubled or extended so as to increase the operating safety of the network and provide greater flexibility in use.Type: GrantFiled: November 29, 1985Date of Patent: September 27, 1988Assignee: SATInventors: Claude J. Force, Claude C. Loisel
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Patent number: 4773607Abstract: An apparatus accumulating a filiform element in order to absorb differences in input and output travel speeds of the element, without tangling and damaging the element. Mechanical means located above an accumulation container draw the filiform element at the input speed and wind the filiform element in layers of coils stacked on the bottom of the container following an epicycloid or hypocycloid path. Two stationary concentric rings, respectively, attached to and suspended above the bottom of the container, guide the filiform element unwound at the output speed through the bottom of the container to the outside. The apparatus is particularly designed for a very fine and fragile filiform element such as an optical fiber, and is inserted between a multifibering machine and a cabling line.Type: GrantFiled: March 24, 1987Date of Patent: September 27, 1988Assignees: SAT (Societe Anonyme de Telecommunications), SILEC (Societe Industrielle de Liaisons Electriques)Inventors: Bernard M. Missout, Jean-Pierre Michaux, Jean-Louis Striebig
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Patent number: 4771175Abstract: The camera includes a chip of infrared detectors disposed in lines and a processing chip. The latter comprises integrators for integrating the output currents of the detectors, controlled by an automatic gain control loop for reducing the dynamic of the signal, delay lines, a summator for each line of detectors, error correction devices for reducing the fixed spatial noise errors, and a multiplexer receiving the signals associated with the various lines of detectors and furnishing a signal to a display device.Type: GrantFiled: December 8, 1986Date of Patent: September 13, 1988Assignee: SAT (Societe Anonyme de Telecommunications)Inventors: Michel Sirieix, Henri Pruvot, Albin Virdis
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Patent number: 4719562Abstract: The system according to the invention comprises a central microprocessor and peripheral microprocessors. A direct-access transfer memory is provided for the communication of the processors with one another. The memory is divided into as many distinct, determined zones as there are peripheral processors. The memory is connected to two addressing buses of which the latter serves equally well to address the boxes of the memory by the central microprocessor and to address the zones of the memory allocated to the peripheral microprocessors. The system is particularly well adapted to data transfers between a telephone automatic switch and subscribers' sets.Type: GrantFiled: July 18, 1984Date of Patent: January 12, 1988Assignee: SAT Societe Anonyme de TelecommunicationsInventors: Francois P. Bailly, Alain Bourgoin, Francois Vaillant
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Patent number: 4716742Abstract: A cryogenic device for radiation detectors is provided comprising an enclosure situated between a cryogenic cold finger supporting a detector and an external wall. After a brief degasification under vacuum of said enclosure, at least one gas is therein introduced, whose liquefaction or solidification temperature is higher than the temperature reached by said cold finger.Type: GrantFiled: September 26, 1985Date of Patent: January 5, 1988Assignee: SAT (Societe Anonyme de Telecommunications)Inventors: Michel M. E. Germain-Lacour, Joseph M. A. Loiseau
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Patent number: 4637030Abstract: A switching laser comprising, in a cavity, a cell of an amplification gas and a cell of an absorption gas, means for exciting said amplification gas and means for exciting said absorption gas. Said means for exciting the absorption cell comprise a radio frequency AC voltage source pulsed at a certain rate. The laser is namely used for infrared detection.Type: GrantFiled: December 4, 1984Date of Patent: January 13, 1987Assignee: SATInventors: Thierry R. Midavaine, Michel M. Ouhayoun
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Patent number: 4634216Abstract: Two optical fibers are connected by a device including a base member having a central groove for aligning and abutting the fiber ends. To connect the fibers quickly without having to dismantle any device members, the device comprises a one piece bent spring fastener having a U-shaped cross-section. Natural flexion of a flexible arm of the spring fastener presses the fiber ends into the groove in the immediate vicinity of a fiber endface connection plane. The other arm is anchored to the base member. To connect the fibers, a tool deflects the flexible arm away from the base member and the fiber ends are slide into the groove. The device is in a very slim-like housing and several can be stacked to create a multifiber connecting rack.Type: GrantFiled: January 5, 1984Date of Patent: January 6, 1987Assignees: Societe Anonyme de Telecommunications (SAT), Societe Industrielle de Liaisons ElectroiquesInventors: Robert Calevo, Vincent Dewez, Marcel Garcia
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Patent number: 4624715Abstract: The present invention relates to a process for passivation of photoconductive detectors constituted by Hg Cd Te, wherein a layer of native oxide is formed on the faces of an Hg Cd Te wafer and it is made to grow, by pure chemical oxidation in an aqueous solution of K.sub.3 Fe(CN).sub.6 and of KOH. An ordinary layer of ZnS is then formed on the oxide layer. The process makes it possible to produce high-performance infrared detectors, simply.Type: GrantFiled: October 4, 1984Date of Patent: November 25, 1986Assignee: SATInventor: Andre Gauthier
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Patent number: D284854Type: GrantFiled: July 26, 1983Date of Patent: July 29, 1986Assignee: SAT (Societe Anonyme de Telecommunications)Inventor: Francois Vaillant