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US 5,291,539 AGranted
Variable focussed X-ray grid
AssigneeGeneral Electric Company
InventorsGary J. Thumann, Jonathan C. Boomgaarden, Daniel P. Miller
Life of this patent
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Abstract
A flexible elongated slatted grid structure is suspended between a pair of spaced apart grid support frames each of which is adapted for rotation about a transverse axis intermediate the suspended ends of the grid. Mechanical adjustment means provides equal but opposite angular motion of the frames to curve the grid along a circular path.
Claims12
Adjustment means for a variable focussed X-ray grid comprising in combination
- (a) a pair of spaced apart grid support members supported for individual equal and opposite angular rotation,
- (b) a flexible resiliently stiff grid structure attached to and suspended between said grid support members,
- (c) adjustment means to adjustably rotate said support members in unison through equal but opposite angles to cause said resiliently stiff grid to bow therebetween to define a circular arc between said support members.
A variable focussed X-ray grid assembly comprising in combination
- (a) a pair of spaced apart grid support members supported for individual equal and opposite angular rotation in unison,
- (b) a flexible resiliently stiff X-ray grid attached to and suspended between said support members,
- (c) movable cam means interconnected with each said support members to rotate said support members,
- (d) drive means operatively connected to said cam means to simultaneously move said movable cam means to equally and oppositely rotate said support members in unison to impose a bending moment in said grid to bow said grid therebetween into an essentially circular arc.
1 more element
Dependencies are inferred from the claim text.