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US 4,399,551 AGranted
X-Ray tube having rotatable transversely oscillatory anode
OwnerJohn K. Gradyinventor
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Abstract
An X-ray tube including a chamber enclosing an anode disc rotatable about an axis, and movable transversely with respect to that axis, the tube also enclosing an electron beam source for projecting electrons along a beam directed towards a planar surface of the anode disc. The beam source is disposed so as to direct its beam at an acute angle of incidence to the planar surface of the anode disc and produce X-rays which are thereupon reflected from the anode disc through a window in the chamber.
Claims7
An X-ray tube comprising:
- a chamber enclosing an electron beam source including a cathode for projecting electrons along a beam axis and a window in said envelope through which X-rays may emerge;
- an anode-disc rotatable about a shaft, said disc having a planar surface normal to said axis of rotation, said beam source being disposed so as to direct said electron beam at an angle of incidence to said normal surface to produce an X-ray which is transmitted through said window;
- and
- means to impart transverse movement to said disc during rotation thereof including support means engaging respective ends of the shaft, guide means slidingly receiving at least one support means and holding the shaft at a fixed angle to the electron beam axis, and means imparting translatory movement to the shaft, thereby to minimize the quantity of electron beams striking any given path on said disc in any particular time interval.
1 more element
Dependencies are inferred from the claim text.