General Electric Cgr S.a.

Sixte De Fraguier

Francois Caire

Catherine Thomas

Gilles Lemestreallan

Problems of thermal resistance both of the anode and of the cathode of an x-ray tube are solved by constructing a flat cathode which is set within a stair-step focusing device. It is shown that, depending on the shape of this device, the heat output on the anode is constant irrespective of the load on the x-ray tube.

X-ray tube having a variable focus which is self-adapted to the load

Problems of thermal resistance of the cathode of an x-ray tube are solved by constructing a flat cathode in the form of a hollow beam. This ensures rigidity of the cathode which is inherent in its beam shape without being attended by the disadvantages of excessive thermal inertia.

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Grasse, France

Sixte De Fraguier