Gravity actuated X-ray scanner

Details Gravity actuated X-ray scanner Gravity actuated X-ray scanner

1986-05-15

1989-12-05

Church, Craig E.

X-ray or gamma ray systems or devices

Source support

Including movable source

378195, 378196, 378198, 2503601, 25036305, H05G 102

Patent

active

048857610

ABSTRACT:
A digital scan projection radiography system is disclosed which is particularly adapted for the rigors of portable deployment. The system scans by gravity. A cam mechanism is employed which raises the pivot of a pivotally suspended scanner assembly including source, detector and other components to render gravitational potential energy of the scanner assembly approximately linear with respect to angular scanning displacement. This feature enables limiting scanning angular velocity to an approximately constant value with the aid of only a friction brake. The feature also causes the detector scanning path to more closely approximate a linear path than an arcuate path which would result from simple pivotal pendulum scanning.

REFERENCES:
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patent: 2167115 (1939-07-01), Kieffer
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patent: 2493161 (1950-01-01), Nemet
patent: 3456114 (1969-07-01), Gray
patent: 4179100 (1979-12-01), Sashin et al.
patent: 4187429 (1980-02-01), Tomita et al.
patent: 4213050 (1980-07-01), Meek
patent: 4426715 (1984-01-01), Baer et al.
patent: 4658408 (1987-04-01), Amor et al.

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