Commissariat a L'energie Atomique

Crismatec

Michel Brochier

Jean-Jacques Chaillout

Marcel Locatelli

Claude Moreau

Jean Chavand

Rene Ranc

Jacques Gaidry

Bruno Ferrieu

Francois Lissalde

Franccois Moutet

Pierre Bathelet

Maurice Pichon

A device for induction measurement of a medium adjacent a cylindrical, metallic, magnetic walled well of a well casing includes at least two magnetic circuits for magnetically saturating the metallic wall. Each of the magnetic circuits has a plate-like central portion, situated between two lateral portions, each of which lateral portions has a lateral end which comes into contact with the wall, along a zone parallel to the cylindrical axis of the wall. After magnetic saturation of the metallic wall, an induction signal is induced into the medium beyond the metallic wall and retransmitted by the medium in response to the induction signal.

Induction measurement in the presence of metallic, magnetic walls

Finger joint prosthesis for metacarpophalangeal and interphalangeal

The invention relates to a monocrystal pulling head. A carriage carrying the vertical pulling spindle, in which is placed a weight transducer, moves parallel to said axis under the action of a torque motor, which is controlled in position and speed and which is directly connected to the threaded rod of a screw - nut system. During its displacement, the carriage is guided by a rail, on which roll at least two pairs of rollers. A torque motor is mounted in the carriage for directly rotating the pulling spindle. Thus, the spindle displacement speeds are very accurately controlled. An electronic system integral with the pulling spindle processes the signals from the weight transducer. Contactless means make it possible to supply the electronic system, feed the useful information to the fixed parts and return thereto control instructions.

Machine for pulling monocrystals

An apparatus for breaking up metal parts is characterized in that it comprises at least two conductive supports connected to an electric power supply and able at least partly to support the part to be broken up. Application to the breaking up of metal parts by a thermoelectric effect.

Apparatus for breaking up metal parts

A vertical electrolytic cell has an anode separated from a cathode by a diaphragm. The cathode comprises continuous threads of mercury flowing down by gravity from evenly distributed apertures in the bottom wall of at least one channel fed with mercury.

Vertical elecrolytic cells

Growing community of inventors

Haute Jarrie, France

Michel Brochier