Bruker Biospin Gmbh

Bruker Sa

Bruker Biospon Sa

Sadis Bruker Spectrospin, S.a.

'o.d.a.m.' Office De Distribution D'appareils Medicaux (Societe Anonyme)

Christian Brevard

Michel Weiss

Olivier Gonella

Jean-Max Tyburn

Laurent Martinache

Albert Cansell

Michel Kraemer

Jacques Felblinger

Francis Taulelle

Bernard Loewenguth

Chris Boesch

Dominique Massiot

Jean-Claude Rifflet

Jean-Pierre Coutures

Jean-Pierre Mabire

An L-C type filter module comprising at least two capacitors and at least one inductor. Each of the capacitors consists of a first elongated element made of conductive material partially fitted in a hole made in a second element made of conductive material, connected electrically to the second elements of the other capacitor(s) or possibly common to the various capacitors, at least the internal lateral surfaces defining the holes being covered with dielectric material, as are the edges of the openings of the holes or perforations and at least parts, or preferably all, of the external surfaces of the second element(s) adjoining the edges, and the coil of each inductor is carried by a support body made of dielectric material, possibly contiguous with the second element(s) or the dielectric coating at least partially covering the external face of each second element.

L-C type filter module and helical filter made up of at least two such modules

A variable capacitor includes a first component made of conductive material in the form of an at least partially hollow rod, comprising a hole or perforation extending axially into the body of the first component to form a tube portion, and a second component also made of conductive material in the form of a rod able to be fitted to a variable depth into the axial hole, the engagement depth of the second component in the first component determining the degree of capacitive coupling between them and therefore the value of the resulting capacitor. The capacitor tube portion is provided on its internal face, preferably substantially over the whole depth of the axial hole, with a layer of dielectric material, the latter extending in a continuous manner over the edge defining the access aperture of the hole and onto an adjacent part of the external face of the tube portion.

Variable capacitor, filter and NMR sensor comprising such a capacitor

A device for generating a radio frequency electrical signals, delivering at least two separate signals having different frequencies, in the form of signals delivered by different primary sources and amplified with a predetermined gain. The device comprises a combining circuit ( ), combining the signals delivered by the primary sources ( ), a single channel power amplifier ( ) and a multi-channel selection and routing unit ( ) with a parallel structure. Each channel delivers at the output an amplified signal (S) at a frequency (F) characteristic of one of the primary sources ( ) and comprises a filter circuit ( ) adjusted to be passing for one of the different characteristic frequencies (F) of the different primary sources ( ), an impedance adaptation circuit ( ) and a rejection circuit ( ) for frequencies other than the passing frequency of the filter circuit ( ) of the channel in question.

Device for generating RF signals at multiple frequencies

An excitation circuit of a probe for measuring and recovering the signal emitted in return by this latter in an NMR spectrometric apparatus, connecting the probe under conditions defined by switching elements forming a portion of the circuit, to a high frequency excitation signal generator by a portion of the line or emission line, and by a portion of the line or reception line, to a receiver for acquiring and using signals emitted by the probe as a function of the specimen to be analyzed which it contains, a device being provided to carry out or verify the tuning of the measuring probe with the excitation signal generator, associated with the circuit. The device includes a directive coupler, mounted to the portion of the emission line.

Circuit for the excitation and recovery of the signal emitted by a probe in an NMR spectrometric apparatus

A probe, particularly a urethral probe, for the heating of tissue by microwaves and for the measurement of temperature by radiometry. The probe comprises, on the one hand, at least one elongated antenna (1) formed by at least one conductive portion (2, 2') rolled up in a helicoidal manner on an elongated dielectric support (3) having a front end and a rear end, on the other hand, electrical connections (4) for the transfer of microwave signals toward and from the antenna, connected to a corresponding external generator and radiometer, and, finally, a catheter (5) covering the antenna (1) and, as the case may be, at least the portion of the electrical connections adjacent the antenna (1). The central dielectric support (3) has structure for circulation of thermostatic fluid of the antenna (1) at least present within the tubular channel delimited by the helicoidal conductor portion (2, 2'), this structure being connected to structure (6, 6', 6', 6'') for the supply and evacuation of the thermostatic fluid.

Probe, particulary a urethral probe, for heating of tissues by microwave

A detector device delivering a signal representative of the respiration of patient, adapted to be used in a charged and sensitive electromagnetic environment. The device is principally constituted by at least two non-metallic electrodes (1) and by a unit for the processing of electrical signals emitted by the heart, comprising a first module (5) for acquiring and shaping cardiac electric signals, a second module (6) for extraction of the respiratory signal, and a third module (7) for electro-optical conversion of this latter, the modules being disposed in a shielded casing (8) forming a Faraday cage and, finally, by an optical connection (9) connecting the casing (8) to at least one other apparatus or device.

NMR pickup device delivering a signal representative of breathing of a

A probe for spectrometric measurements of magnetic resonance at very high temperatures includes a resonator (3) within which is disposed a sample (9) to be analyzed. A laser beam from a laser (6) is conducted toward and focused upon the sample (9) for heating the same, and levitation of the sample (9) during measurement proceedings within the resonator (3), as a means of thermally isolating the sample (9) from its surroundings, is achieved by means of a levitation gas from a gas source (18) which is introduced into the resonator (3) by means of a constriction zone aperture (17) whereby the sample (9) is maintained within an upper cavity (16) of the resonator (3).

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Wissembourg, France

Christian Brevard