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| Number | Title | Issue Date |
| 6335856 | Triboelectric device A triboelectric device includes a voltage source, a polarizing amplifier, and electrodes to apply a polarizing voltage to a first material of the device. The electrodes are not fixed to the first material, allowing relative rubbing displacement between th... | 01/01/2002 |
| 6180809 | Method of preparing silicon and boron oxynitrides A boron and silicon oxynitride obtained by preparing a polyborosiloxane precursor, conducting nitriding pyrolysis of the precursor to obtain an amorphous boron and silicon oxynitride, and optionally conducting additional pyrolysis to obtain a crystallized... | 01/30/2001 |
| 5939667 | Subsea thermoelectric generator with thermoelectric modules disposed in sleeves A subsea thermoelectric generator has a plurality of flat thermoelectric modules attached concentrically to the outside wall of an undersea line in which petroleum products extracted from a subsea drilling well circulate. The thermoelectric modules are di... | 08/17/1999 |
| 5694374 | Process and device to reduce the resonant frequency of the cavities of the submersible transducers The invention is directed to the class of submersible electro-acoustic transducers such as double "Tonpilz" transducers, wherein it is desirable to reduce the resonant frequency of the transducers while maintaining a given output power emitted by the tran... | 12/02/1997 |
| 5579287 | Process and transducer for emitting wide band and low frequency acoustic waves in unlimited immersion depths The present invention relates to a process and transducer for emitting wide and and low frequency acoustic waves in unlimited immersion depth. The invention is applied to tranducers comprising at least one electro-acoustic motor (1) causing any wall 3 of the sa... | 11/26/1996 |
| 5551368 | Container for launching a lightweight torpedo from a surface craft A container is intended for containing a lightweight torpedo type weapon to e launched from a surface craft. The weapon includes activation structure for the batteries supplying energy to the weapon, an extraction device of the activation safety device whe... | 09/03/1996 |
| 5469406 | Method of emitting very low frequency high power acoustic waves, and corresponding transducers therefor A transducer includes one or more electro-acoustic motors located on a same internal plane or as a peripheral ring of a flexible envelope to which they are interdependent by at least one-of their ends by an assembling device and to which they transmit the... | 11/21/1995 |
| 5043953 | Pressure compensation device for an immersed volume of gas, in particular for an underwater electroacoustic transducer This pressure compensating device for a volume of immersed gas is equipped with mobile or deformable walls and includes an immersed compensation bladder. The bladder is secured in a housing and communicates with the volume to be compensated. It is arrange... | 08/27/1991 |
| 4811307 | Tonpilz type piezoelectric transducer capable of operating alternately as wideband receiver and emitter A Tonpilz type piezoelectric transducer which can be used alternately as a wide-band receiver and an emitter includes a stack of pairs of piezoelectric segments separated by electrodes, the stack being placed between a horn and a countermass. An emitter i... | 03/07/1989 |
| 4766812 | Varnish protecting a caseless or combustible-case round of ammunition against thermoinitiation The invention concerns a protective varnish applied to a caseless or combible-case round of ammunition against thermoinitiation. This varnish includes at least one reactive layer applied to the ammunition, consisting of a synthetic resin and an oxidizer ... | 08/30/1988 |
| 4708077 | Hull shapes for surface effect ship with side walls and two modes of operation The present invention concerns hull shapes for a surface effect ship, including a catamaran type supported structure with two side walls (100) connected by a center platform (200), able to operate either as a buoyant displacement vehicle, or as an air cus... | 11/24/1987 |
| 4575689 | High frequency oscillator with a compensated isochronism deficiency The high frequency oscillator includes a piezo-electric crystal (1) which is connected to at least two exciter electrodes (3, 4) and means which make it possible to apply on the one hand to the electrodes (3, 4) electric excitation power for the crystal a... | 03/11/1986 |
| 4357401 | Macromolecular material of ionic conduction A solid electrolyte formed of a cross-linked elastomeric complex material charged with one or more ionizable salts of high ionic conduction.... | 11/02/1982 |
| 4284224 | Riveting device using a shaped charge A rivet apparatus is provided for securing together a first element to a second element made of solid metal. The apparatus comprises a support 3 which is common to the first element and to a hollow charge 4. A metal rivet or nail 5 embedded in the charge ... | 08/18/1981 |
| 4135108 | Quartz resonator with electrodes that do not adhere to the crystal Quartz resonator with electrodes that do not adhere to the crystal. Quartz resonator having improved medium-term and long-term stabilities and permitting easier placing on frequency. The resonator comprises, inside a tight housing 1, a condenser formed by... | 01/16/1979 |
