Abstract:
Gaseous flux laser oscillator of the type in which a gaseous mixture is excited axially within the optical resonant cavity by an electrical discharge. A hole drilled in one of the mirrors of the optical cavity enables both the exiting of the light beam produced and the inserting of the gas in the discharge tube in the form of a high-speed jet causing a swirling flow. Application to the increasing of the power of gaseous flux lasers.
Abstract:
In a cryogenic connection wherein tubular conductors insulated by a vacuum and carrying a cryogenic fluid, provides a fluid connection between the vacuum surrounding the current conducting tubular conductors with the annular cavity also subjected to vacuum pressure between inner and outer enclosures providing thermal insulation to the cryogenic connection. The coupling of connection elements is effected in a sequential conductor laying process, utilizing rectilinear sections of 20-metre enclosures and of semirigid conductor tubes of similar length.
Abstract:
An arrangement for controlling the operation of a series, parallel, or series-parallel connected assembly of semiconductor devices comprising at least two generators for providing control signals at respective predetermined control frequencies and controlled by a common source, and a respective general control circuit supplied with the control signals by each generator and being at least in part tuned to the respective predetermined control frequency, each general control circuit being arranged to supply the control signals simultaneously to all the semiconductor devices.
Abstract:
A LASER GENERATOR HAVING A LIQUID ACTIVE MEDIUM CONSISTING OF A SOLVENT COMPRISING PRODUCTS OF THE HYDROLYSIS OF THIONYL CHORIDE AND OF ANTIMONY CHLORIDE IN WHICH A DOPING MEDIUM IS DISSOLVED.
Abstract:
BASIC CELL WITH HYDROCARBON FUEL, IN WHICH A DECARBONIZATION OF THE ELECTROLYTE IS CARRIED OUT. IT COMPRISES TWO DIAPHRAGMS RESPECTIVELY ANODIC AND CATHODIC WHICH INSULATE A CENTRAL COMPARTMENT WHEREIN THERE LOCALLY APPEARS A PH VALUE SUFFICIENTLY LOW TO GIVE RISE TO A CARBON DIOXIDE EMISSION.
THE INVENTION MAY BE USED FOR FUEL CELLS HAVING A HIGH OVERALL ENERGETIC YIELD.
Abstract:
The triggering electrode is butted against an opening in the cathode, against the inside face of this cathode, closing a solid dielectric sheet with an opening perforated in it. This permits, on the one hand, the precise positioning of this electrode with respect to the cathode, with a small interval, 12 microns, for example, and on the other hand, the lowering of the voltage necessary to provide the pulse for the triggering. The invention applies particularly to rapid spark arresters where the triggering voltage is less than 2 kV.
Abstract:
A device on board a ship for recording ultrasonic holograms of submerged objects. Ultrasonic waves back-scattered by the heterogeneities of the layer of water neat to the object studied are used as a reference signal. The irregularities of the propagation speed of the waves in the water are thus eliminated.
Abstract:
A device for measuring the concentration of an electrolyte utilizing measuring electrodes and a current generating means supplying the electrodes with a small current for maintaining them in their initial charge state and voltage measuring means connected to the electrodes for indicating the concentration of the electrolyte.
Abstract:
An antenna having a large spherical reflector and a small reflector, wherein the main lobe may be oriented with respect to the large spherical reflector by virtue of the displacement of the small reflector, these displacements being rotations around the center of curvature of the large reflector, and the waves irradiating the small reflector being spherical around the same center, the beam formed by these waves shifting with the displacement of the small reflector.
Abstract:
IS PERFORMED BY ELECTRONIC MEANS, T being the rotation period of the said unit, the value of the resulting signal being g, which is the characteristic of the angle defining the position of the unknown reference direction in relation to the known reference direction. A process and an apparatus are disclosed for determining an unknown reference direction by means of a rotating unit which transmits a signal f( Alpha - phi ), Alpha being the angular position of the unit in relation to a known reference direction, phi being the angle between the said unknown reference direction and the known reference direction. A signal f( Alpha ) identical to the signal f( Alpha - phi ) is generated to the nearest constant multiplying factor. The operation