General Electric Cgr S.a.

Thomson-Cgr

G.e. Medical Systems, S.a.

Jacques Sireul

Hans Jedlitschka

Claude Prevot

Rene Gauthier

Gauthier Rene

Bernard Rigeade

Jacob Herve

Denis Perillat

Jean-Michel Miquel

Dominique Poincloux

Hans WA Jedlitschka

The HT power supply unit modular support according to the invention comprises functional housings intended to accommodate the functional elements of the power supply unit, the insulating walls of which are formed by two protruding walls (2, 3) having overlapping complementary inclined surfaces (5, 6). Application to HT power supply units for X-ray sources.

Modular support for the functional elements of a high-voltage power

An X-ray tube is enclosed in a casing containing a cooling fluid. At least one terminal part of the casing is elongated to house a high-voltage power supply device comprising a high-voltage output terminal connected to the anode and/or the cathode and low-voltage input terminals connected to low-voltage contact elements for connection to a low-voltage supply source that is located outside the casing.

X-ray unit with high-voltage power supply device integrated into the

In a high-voltage power device for X-ray tubes, a single magnetic circuit is used to couple a primary circuit to two separate secondary circuits. Each of these secondary circuits comprises a series of secondary windings, each connected to a rectifier-doubler circuit constituted by diodes, borne by a printed circuit, and by capacitors, borne in a cellular compartment. This arrangement makes it possible notably to double the output high voltage or to obtain perfectly symmetrical high voltages in a device that occupies less space.

High-voltage power device and power pack for X-ray tube

The disclosure relates to high-voltage change-over switches that are used to apply high voltage alternately to two X-ray tubes. Each of the four switch devices constituting a change-over switch includes a fixed contact element connected to an input terminal of the high voltage and a movable contact element connected to an output terminal by a curved, flexible strip, the shifting of which is obtained by a hinged arm that is actuated by an insulator sleeve surrounding the strip. The rotation of the sleeve in one direction causes contact through a hole in the wall of the sleeve while rotation in the reverse direction causes the contact elements to move away from each other and gives rise to the interposition of the insulator wall between the contact elements at a distance. The disclosed device can be applied to radiology installations.

High voltage switch device and high-voltage change-over switch

A change-over switch comprises four input terminals connected in pairs to one of the two poles +HT and -HT of a high voltage generator and four output terminals connected in pairs to one of two X-ray tubes. It includes two identical half change-over switches with coupled control, each half change-over switch comprising two contact devices, each constituted by a fixed contact element and a movable contact element between which there is interposed an insulation device when the electrical contact is open. The movable contact elements and the insulation device of each half change-over switch are connected to one another to have combined movements.

High-voltage change-over switch with linear movement

A high-voltage connector, in particular for feeding the cathode, two cathode filaments, and two gates of an X-ray tube, wherein the connector comprises five connections, one for power supplying the cathode, two for power supplying the cathode filaments, and the last two for power supplying the two gates, the connections being disposed in such a manner that the distance between the cathode connection and a gate connection and the distance between the two gate connections are greater than the distance between the cathode connection and a cathode filament connection.

High-voltage connector for an X-ray tube

The invention relates to high-voltage power supplies for X-ray tubes in radiological apparatuses. The invention lies in the fact that the secondary windings of the transformer, the capacitors, and the diodes of the rectifier and voltage-doubler circuits, are all disposed in an enclosure made from two half-shells, whereas the primary winding and the magnetic circuit are disposed outside the enclosure.

High-voltage block for an X-ray tube, the block including a cooling tank

In an electrical device for supplying x-ray tubes, the primary and secondary windings of the transformer are wound on circular coil forms which are adapted to fit within two half-shells. The half-shells are constituted by a recessed annular structure in which capacitors are housed. The output terminals of the secondary windings are placed on one side in order to be connected to the capacitors and to diodes over very short distances.

High-voltage supply device for an x-ray tube

Examination bed for NMR or tomodensitometry apparatus

A device for monitoring a patient in a medical examination apparatus has a support on which are mounted a television camera and a mirror sending on an image of a part of the patient to the camera, said support being movable with respect to the frame of the apparatus but fixed with respect to the patient.

Device to monitor a patient in an apparatus for medical examination

A mandrel for holding gradient coils in an instrument that measures nuclear magnetic resonance is fastened directly to the magnet of this instrument. It is shown that this arrangement can be used to reduce the output of noise while, at the same time, making it easy to adjust the position of the mandrel. The device comprises two sets of brackets fastened by their struts, on either side of the magnet, to the end rings of the magnet. Each bracket exerts a holding force on the mandrel.

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Wissous, France

Jacques Sireul