Abstract: A monoblock X-ray generating device is provided. The device includes a rotor, a stator, an anode and a cathode positioned in a first module, the first module comprising a first cooling circuit. The device further includes a high voltage transformer positioned in a second module, the second module comprising a second cooling circuit. The first and second cooling circuits are positioned apart from each other, and one of the first and the second modules comprises a male connector and the other of the first and the second modules comprises a mating female connector.

Abstract: A medical imaging system including a support, an X-ray emitting tube, and, facing the latter, a detector, the X-ray emitting tube being intended to accept displacements relatively to at least one portion of the support, the system also including a remote piece of equipment providing circulation of an oil intended to provide cooling and electric insulation of the X-ray emitting tube on the one hand, pipes in which said oil circulates, connecting the remote piece of equipment and the X-ray emitting tube, and a device for dehydrating the oil on the other hand, wherein the dehydration device includes means positioned in the circuit through which the oil flows during normal use of said imaging system and which provide or maintain dehydration of said oil during this use.

Abstract: A medical imaging system including a support, an X-ray emitting tube, and, facing the latter, a detector, the X-ray emitting tube being intended to accept displacements relatively to at least one portion of the support, the system also including a remote piece of equipment providing circulation of an oil intended to provide cooling and electric insulation of the X-ray emitting tube on the one hand, pipes in which said oil circulates, connecting the remote piece of equipment and the X-ray emitting tube, and a device for dehydrating the oil on the other hand, wherein the dehydration device includes means positioned in the circuit through which the oil flows during normal use of said imaging system and which provide or maintain dehydration of said oil during this use.

Abstract: In a method for stabilizing the size of a focal spot of an X-ray tube and contrast modulation function of a X-ray tube, the tube has a cathode comprising a concentrator and a heating filament. It has an anode is placed so as to be facing the cathode. With the filament, the cathode produces an electron beam bombarding the focal spot of the anode. A bias voltage is applied between a terminal of the filament and a terminal of the concentrator. The tube has means to measure the size of the focal spot and the function of contrast modulation. It also has means to regulate the size of the focal spot and the contrast modulation function by means of a bias voltage.

Abstract: In a method for stabilizing the size of a focal spot of an X-ray tube and contrast modulation function of a X-ray tube, the tube has a cathode comprising a concentrator and a heating filament. It has an anode is placed so as to be facing the cathode. With the filament, the cathode produces an electron beam bombarding the focal spot of the anode. A bias voltage is applied between a terminal of the filament and a terminal of the concentrator. The tube has means to measure the size of the focal spot and the function of contrast modulation. It also has means to regulate the size of the focal spot and the contrast modulation function by means of a bias voltage.

Abstract: A filter plate having defects that may cause image artefacts is moved during an exposure. The movement distributes the defects of the plate in the image to a point where they can no longer be seen in the image. Preferably, the shifting of the plate is done in the plane of the plate, in a direction perpendicular to the axes of the rollers used for in the manufacture of the plate.

Abstract: A bearing assembly for the rotational mounting of a rotary anode of an X-ray emitting device on a support having at least one rolling bearing provided in order to be placed between the rotary anode and the support, the rolling bearing having a rotating ring, a non-rotating ring, and rolling elements placed between raceways of the first ring and of the second ring. At least one sleeve is intended to be mounted between an axially stressed ring of the rolling bearing and a cylindrical bearing surface of the anode or of the support, the sleeve being radially elastic in order to compensate for variations in radial dimensions between the ring and the cylindrical bearing surface, and in order to dampen the vibration, while at the same time being suitable for allowing the ring to slide axially with respect to the cylindrical bearing surface.

Abstract: An X-ray emission device and method for a radiology apparatus comprises a cathode and a rotating anode, the anode being provided with a roughly cylindrical surface. The device forms a beam of electrons that bombards a portion of the roughly cylindrical surface of the anode that constitutes the focal point of emission of the X-rays. The position of the focal point of the anode relative to a reference position is dynamically controlled.

Abstract: A filter plate having defects that may cause image artefacts is moved during an exposure. The movement distributes the defects of the plate in the image to a point where they can no longer be seen in the image. Preferably, the shifting of the plate is done in the plane of the plate, in a direction perpendicular to the axes of the rollers used for in the manufacture of the plate.

Abstract: A bearing assembly for the rotational mounting of a rotary anode of an X-ray emitting device on a support having at least one rolling bearing provided in order to be placed between the rotary anode and the support, the rolling bearing having a rotating ring, a non-rotating ring, and rolling elements placed between raceways of the first ring and of the second ring. At least one sleeve is intended to be mounted between an axially stressed ring of the rolling bearing and a cylindrical bearing surface of the anode or of the support, the sleeve being radially elastic in order to compensate for variations in radial dimensions between the ring and the cylindrical bearing surface, and in order to dampen the vibration, while at the same time being suitable for allowing the ring to slide axially with respect to the cylindrical bearing surface.

Abstract: An X-ray emission device and method for a radiology apparatus comprises a cathode and a rotating anode, the anode being provided with a roughly cylindrical surface. The device forms a beam of electrons that bombards a portion of the roughly cylindrical surface of the anode that constitutes the focal point of emission of the X-rays. The position of the focal point of the anode relative to a reference position is dynamically controlled.

Abstract: An expandable high-pressure flexible tube device for sealing piping in gas or oil fields. The device comprises two end pieces interconnected by a tubular element having an elastomeric material and sheets of coils round about its longitudinal axis at a small angle of about 10.degree. to 15.degree. relative thereto. The sheets comprise strong helical textile cords mutually separated by a predetermined spacing. A sheet having longitudinal textile cords extends over the whole length of the device, the helical cords and longitudinal cords being imbedded in the elastomeric material.

Abstract: Thermally insulating pipe lagging comprising a tube of compact and flexible elastomer type material designed to come into contact with the pipe to be insulated and shaped on its inside surface to have a helical groove which provides between its adjacent turns a coil filled with air or gas when the lagging is put into place so as to surround said pipe.

Abstract: A cassette for a device for continuously casting liquid metal between two parallel rolls, the cassette includes a metal case which has a lateral wall and is open on a side of the case, and plate of refractory material which may be preheated before casting the liquid metal. The refractory plate is preshaped in such a manner so to define a free space between the periphery of the plate and the lateral wall of the case. The cassette is provided with an arrangement for fixing and gripping the plate and exerting an elastically yieldable opposing action allowing free expansion of the plate within the case.

Abstract: According to the invention, the coupler (1) for a textile-reinforced rubber hose is of the type comprising a metal end-fitting (2) and a metal bush (3) between which one end of the hose (5) is imprisoned by crimping. The coupler (1) has three separate zones, a zone (A) providing a fastening function, a zone (ED) providing a dynamic-sealing function and an intermediate zone (ES) providing a static-sealing function. Such a coupler enables textile-reinforced rubber hoses to be used at pressures of the order of 200 bar.

Abstract: A fire-proofing protective covering for an elongate structure such as a hose, an electrical or optical cable, or pneumatic or hydraulic ducting, comprises: a first plurality of layers made of an inorganic material having a structure which is suitable for imprisoning air while still allowing the operation of the elongate structure to be maintained at relatively high temperatures, of the order of at least 850.degree. C., and for a given length of time, of the order of at least several minutes, and a second plurality of layers, with each of the layers being disposed alternately relative to each of the layers of the first plurality so that the layers of the first plurality are on the inside while the layers of the second plurality are made of a material which substantially constitutes a barrier for the air imprisoned in the corresponding layer of the first plurality. The invention is applicable to the opto-electrical industry, to the hydraulic industry, etc. . . . for protecting ducting from fire.

Abstract: The device for casting thin metal products comprises one or two rolls (1) driven in rotation and having cooled walls, and side walls (3) defining a casting space (4). The surface of each roll is divided into at least three circumferential zones, at least one (5) of said zones having a roughness (Rz) greater than the roughness of the other zones (6). This device permits carrying out the process according to the invention in which solely certain longitudinal zones of the skins of cast metal solidified on contact with the cooled walls of the rolls are preferentially driven along.

Abstract: Installation for continuous casting between two rolls (1,2) having parallel axes and defining therebetween and with two fixed lateral walls (3) a casting space for a liquid metal, each lateral wall comprising at least one lateral part (6) placed against the planar end face of an adjacent one of the rolls and constituted by a portion of a disc having an outside diameter equal to that of the adjacent roll, and a part (12) which is central relative to and confronts the casting space and is composed of an insulating refractory material. The disc portion is made from a material having properties of thermal conductivity and mechanical resistance superior to those of the refractory material and is a frustoconical disc portion whose face having the larger radius of curvature is placed against the adjacent roll and the disc portion defines a frustoconical surface which is in contact with the insulating material of the central part.

Abstract: The device for casting thin metal products comprises one or two rolls (1) driven in rotation and having cooled walls, and side walls (3) defining a casting space (4). The surface of each roll is divided into at least three circumferential zones, at least one (5) of said zones having a roughness greater than the roughness of the other zones (6). This device permits carrying out the process according to the invention in which solely certain longitudinal zones of the skins of cast metal solidified on contact with the cooled walls of the rolls are preferentially driven along.

Abstract: The surface of each roll (2, 3) has a knurling constituted by two series of parallel grooves (5, 6) which are inclined to the axis (XX) of the roll and joining up at the center of the latter so as to form a series of chevrons, the two grooves (5, 6) of each chevron downwardly converging when they are on the side of the roll (2, 3) in contact with the liquid metal. The device is completed by a cage for extracting the cast product at a speed slightly higher than the speed of rotation of the casting rolls (2, 3). This arrangement avoids the formation of longitudinal or transverse cracks on the surface of the cast thin metal strip.