Method for assembling a high vacuum rotating anode X-ray tube

Details Method for assembling a high vacuum rotating anode X-ray tube Method for assembling a high vacuum rotating anode X-ray tube

1983-09-19

1985-02-26

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

313 40, 29460, 277 1, H01J 900

Patent

active

045015660

ABSTRACT:
A method of vacuum assembling a rotating anode X-ray tube of the type having a rotor and a shaft extending therefrom with a magnetic fluid for vacuum sealing about the shaft. The tube is subjected to a high temperature bake-out whereby gases are sufficiently evolved from exposed metal parts that a stable low pressure region is created. A static seal is used to temporarily seal the region during bake-out with the anode temporarily rendered non-rotatable and the permanent magnetic vacuum seal protected from the high temperature. The system is then allowed to cool off before the permanent magnetic vacuum seal is moved into its operational position within the high vacuum. Assembly tooling is provided ensuring that the high vacuum is maintained throughout the installation. Bearings are installed external to the region of high vacuum to transmit rotary motion of the shaft through the permanent seal. Finally, the tube is rendered operational by displacing the static seal thereby permitting the anode to be rotated.

REFERENCES:
patent: 3846006 (1974-11-01), Atlee et al.
patent: 4144471 (1979-03-01), Hartl
patent: 4309637 (1982-01-01), Fetter

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