Patent application number | Description | Published |
20090095718 | Vacuum Cartridge For An Electrical Protection Apparatus Such As A Switch Or A Circuit Breaker - This cartridge comprises at least three shields comprising one shield called mid-potential shield inserted between the two contacts and at least one shield called partial shield inserted between said mid-potential shield and one of the contacts, the distance between said mid-potential shield and the contacts being selected such that the electric field present at the edge of the contact goes from the contact to the partial shield surrounding it (or vice-versa from the partial shield to the contact depending on the polarity of the voltage). | 04-16-2009 |
20100316885 | Assembly method by reactive brazing and vacuum cartridge assembled according to this method - The present invention relates to an assembly method by reactive brazing of a first metallic element such as an end cover plate of a vacuum cartridge with a second element such as the cylindrical body of said cartridge, said second element comprising an ion-covalent oxide at least at the surface by means of an alloy called added alloy designed to constitute a liquid brazing alloy designed to wet the two respectively metallic and ion-covalent oxide surfaces to be assembled of the above-mentioned two elements, said brazing alloy containing titanium and said metallic element containing nickel. This method is characterized in that in the case where the percentage by weight of the alloy elements content of the metal which can form intermetallic compounds with titanium is less than 20%, the titanium content in the brazing alloy is comprised between 2% and 5% by weight, and in the case where the percentage by weight of the alloy elements content of the metal which can form intermetallic compounds with titanium metal to be assembled is comprised between 20% and 50%, this titanium content is chosen between 5% and 10%, and in the case where the percentage by weight of the alloy elements content of the metal which can form intermetallic compounds with titanium is more than 50%, this titanium content is chosen between 2% and 5% and the percentage by weight of Ag is less than 60% so as to minimize the non-wettability areas on the surface of the second element made from ion-covalent oxide by forming a sufficiently thick and stable reactional layer at the interface of said element, and to minimize formation of intermetallic compounds in the brazed joint. | 12-16-2010 |
20110084117 | Device for assembly by brazing an end cap onto a cylindrical body and vacuum cartridge comprising one such device - The present invention relates to a device for assembly by brazing an end cover onto a cylindrical body, said end cover presenting a circular peripheral rim via which said cover is brazed onto a part of one of the end surfaces of the cylindrical body, this device being characterized in that the above-mentioned cover is shaped in such a way that, on the above-mentioned end surface of the cylindrical body, the circular peripheral part of the above-mentioned cover exerts a compressive stress, after brazing, on substantially the whole contact area between the end surface of the cover and the end surface of the cylindrical body. | 04-14-2011 |
20120145674 | Device for detecting vacuum loss in a vacuum breaking apparatus and vacuum breaking apparatus comprising one such device - A device for detecting vacuum loss in a vacuum breaking apparatus that includes an enclosure having a first part at least partially of insulating material, closed at its opposite ends by end-plates, and housing fixed and mobile electrodes. A second part of the enclosure is insulating material at least partially around the first part, this second part is an over-molding of electrically grounded conductive shielding at least a part of its outer surface. This first strip of over-molding faces both the first part and one of the electrodes, thereby providing two capacitances in series, namely, a vacuum capacitance between the electrode and the inner surface of the first part, and a solid capacitance between the inner surface of the first part and the first strip, and means for measuring change of current value in the first strip, which corresponds to a vacuum loss inside a vacuum breaking apparatus. | 06-14-2012 |
Patent application number | Description | Published |
20110050226 | RF COIL FOR MR IMAGING WHICH IS NOT VISIBLE IN X-RAY IMAGE - An RF coil used for MR imaging is designed so that it remains in place in the field of view of an X-Ray imaging system and comprises a support board on which copper conductive traces and copper printed capacitors are carried. The attenuation of the X-Rays caused by the copper traces is visible in the radiation image but this is compensated by arranging the non-conductive material of the support board such that the attenuation of substantially the whole of the RF coil located within the field of view is substantially constant throughout the field of view. | 03-03-2011 |
20120268116 | Magnetic Resonance Signal Detection Using Remotely Positioned Receive Coils - The receive coil arrangement includes an inner coil adjacent the part to be imaged so as to maximize the received MR signal and an outer coil, which may be the built in body coil of the magnet, connected by cable to the signal processing system. Both the coils are individually tuned to the common resonant frequency and the receive coil include an arrangement to halt current flow therein during the transmit stage. The first coil has no cable and is arranged to communicate the MR signal therein to the signal processing system through the outer coil by inducing the MR signal onto the outer coil. Despite inherent losses by interfering with the tuning of the loops and in the inductive coupling this magnifies the MR signal and makes the first coil wireless. Arrangements are provided for generating from the output of the second coil separate signals for separate channels of the signal processing unit. | 10-25-2012 |
20120268132 | Magnetic Resonance Signal Detection Using Remotely Positioned Receive Coils - The receive coil arrangement includes an inner local volume coil adjacent the part to be imaged so as to maximize the received MR signal and an outer coil, which may be the built in body coil of the magnet, connected by cable to the signal processing system. Both the coils are individually tuned to the common resonant frequency and the local volume coil include an arrangement to halt current flow therein during the transmit stage. The local volume coil has no cable and is arranged to communicate the MR signal therein to the signal processing system through the outer coil by inductive coupling to the outer coil. Despite inherent losses by interfering with the tuning of the loops and in the inductive coupling this magnifies the MR signal and makes the local volume coil wireless. | 10-25-2012 |
20120286786 | Phased Array MR RF Coil Which is Not Visible in X-Ray Image - An phased array RF coil used for MR imaging is designed so that it remains in place in the field of view of an X-Ray imaging system and comprises a support board on which copper or aluminum conductive traces are carried. The attenuation of the X-Rays caused by the traces is visible in the radiation image but this is compensated by arranging the non-conductive material of the support board such that the attenuation is substantially constant. The phased array includes individual coil loops which are overlapped with the traces being of half thickness at crossing locations of the traces and with one of the loops on one side and the other loop on the second side of the substrate sheet. | 11-15-2012 |
20130221966 | Magnetic Resonance Signal Detection Using Remotely Positioned Receive Coils - The receive coil arrangement includes an inner local volume coil adjacent the part to be imaged so as to maximize the received MR signal and an outer coil, which may be the built in body coil of the magnet, connected by cable to the signal processing system. Both the coils are individually tuned to the common resonant frequency and the local volume coil include an arrangement to halt current flow therein during the transmit stage. The local volume coil has no cable and is arranged to communicate the MR signal therein to the signal processing system through the outer coil by inductive coupling to the outer coil. Despite inherent losses by interfering with the tuning of the loops and in the inductive coupling this magnifies the MR signal and makes the local volume coil wireless. | 08-29-2013 |
20140128724 | MR Imaging in Separate Rooms Using a Magnet Having a Diagnostic Table - In MR imaging in a suite of rooms including a diagnostic room and a second surgical room, the magnet includes a diagnostic table separable from a docking station of the magnet and the second room includes a second surgical table. An imaging control computer controls operation of the imaging system and a movement control computer controls operation of the magnet moving system and the patient support table. During imaging in the surgical room, the diagnostic table is separated and docked at a secondary docking station while an emulating computer system cooperate with the imaging control computer system by emulating outputs from the disconnected diagnostic table for controlling operation of the imaging system. | 05-08-2014 |
20150015254 | Control of SAR Values in MR Imaging - In a method for imaging a body part of a patient particularly in relation to DBS where conductive elements can reduce a safe SAR level, the power in the RF pulses being delivered to the RF transmit coil is measured in real time by a unit associated with the FR transmit coil and is used to stop the supply of RF pulses to the RF coil in the event that the power exceeds a predetermined safe limit. As signal can also be transmitted to the MR control unit to shut off the imaging sequence. | 01-15-2015 |