X-ray tube

Details X-ray tube X-ray tube

1976-07-21

1978-06-27

Rolinec, Rudolph V.

Electric lamp and discharge devices

Cyclotrons

313 45, 291484B, 291484L, 308241, 308DIG8, H01J 3504

Patent

active

040977595

ABSTRACT:
An X-ray tube includes a rotor body having an outer sleeve of copper and an inner sleeve of steel, the two sleeves being joined by brazing. A black coating is applied to the outer surface of the copper sleeve and the inner surface of the steel sleeve, as well as to the outer surface of a copper bearing housing concentrically disposed within the rotor body. A steel spindle is concentrically and rotatably supported within the housing by a bearing structure and is rigidly affixed to the rotor body to support the rotor body for rotation. The X-ray tube also includes an anode comprised of molybdenum having a coating of rhenium-tungsten. The anode is supported on a shaft comprised of a material having a low coefficient of thermal conductivity such as niobium, an alloy of niobium, molybdenum, or an alloy of molybdenum. The X-ray tube further includes a bearing structure having portions lubricated by lead. The bearing structure includes a grooved outer race which is coated with ion-implanted lead, an inner race comprising a grooved portion of the spindle, and a plurality of lead-burnished balls disposed between the races.

REFERENCES:
patent: 2345723 (1944-04-01), Atlee et al.
patent: 3720853 (1973-03-01), Atlee et al.

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