X-ray or gamma ray systems or devices – Beam control – Shutter or chopper
Reexamination Certificate
2006-05-16
2006-05-16
Glick, Edward J. (Department: 2882)
X-ray or gamma ray systems or devices
Beam control
Shutter or chopper
C378S147000, C250S505100
Reexamination Certificate
active
07046768
ABSTRACT:
A shutter-shield system for radiation protection is applied to a an x-ray generator in a shielded station for inspecting products moving through the station on a conveyor. Deployed in a sliding attachment on a collimator housing of the x-ray generator, a shutter plate is made movable by an actuator and is configured with an aperture that, in the absence of power applied to the actuator, is made to align with a fixed aperture of the collimator so as to allow emission of the x-ray beam as required for normal inspection purposes. Whenever an anomaly in the product loading on the conveyer creates a gap that could otherwise cause an increase in environmental radiation levels, powering the actuator moves the shutter plate to an offset location that offsets the apertures to an effectively closed state to initiate a standby condition wherein x-ray radiation is substantially confined to the interior region of the collimator, without having to shut down the x-ray generator itself.
REFERENCES:
patent: 4195229 (1980-03-01), Suzuki
patent: 4366576 (1982-12-01), Annis
patent: 5172402 (1992-12-01), Mizusawa et al.
Glick Edward J.
InspX LLC
Keaney Elizabeth
McTaggart J. E.
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